Re: [meteorite-list] Randall on ebay! Want those aerial shots?!!
Yes Sterling...I also found this...!! At first I thought someone else was having a joke...but apparently not! http://cgi.ebay.com/Ultra-high-res-photos-of-the-Carancas-meteorite-crater_W0QQitemZ300159255522QQihZ020QQcategoryZ3239QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Sterling K. Webb wrote: Hi, A search of the user name on eBay US site turns up this less than detailed listing: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemcategory=3810item=300158570494 Sterling K. Webb -- - Original Message - From: ensoramanda [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Sunday, October 07, 2007 9:14 PM Subject: [meteorite-list] Randall joke on ebay! Ok...who is the one with the sense of humour after the carancas fragment on ebay...bidding here :-) Made me laugh anyway. http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167268481 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Thin Sections of Carancas Meteorite Chondritic or not
Hi Elton, I thought these looked like shock veins...still having trouble knowing the difference between shock veins and slickenslides in this one? http://i117.photobucket.com/albums/o43/LaburnumStudio/DSCN6902.jpg Graham Mr EMan wrote: As to what Rob has raised--I did see several chondrules in the photos. This looks much like the friable L;s we have seen and contains slickensides which would tend to make it a monomyct breccia. However these large metal blebs are intriguing and might make this an anomalous stone. I didn't see any thing in the photos which appeared to be a true shock vein, only the slicken sides. However for there to be large blebs/clasts of iron and or olivine in the stone it must have had a very shocked history with possibly injected components of an iron or pallasite. If so, this might explain the initial declaration that this was a chondritic pallasite. Elton --- Rob Matson [EMAIL PROTECTED] wrote: Based only on the images of the exteriors, I would consider the specimens very unlikely to be chondritic. But there~are~ some chondrite-like features in the thin sections (though I wouldn't call them unambiguously chondrules). The rims are indistinct, there are no shock veins visible, and the interference colors don't seem quite right. I'll forward the images to a few experts to get their opinions, but if this is a chondrite, it would seem to be a metamorphised, highly brecciated one. --Rob __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Randall joke on ebay!
It looks like he's shilling his auction __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD - Ebay Auctions ending soon
at some hours some my auctions ended. Take a look to the rappresentation of the Holbrook fall in the Domenica del Corriere newspaper in perfect conditions, rare to find. http://members.ebay.com/ws/eBayISAPI.dll?ViewUserPageuserid=mcomemeteorite Matteo __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rocks From Space Picture of the Day - October 8, 2007
http://www.spacerocksinc.com/October_8_2007.html ** See what's new at http://www.aol.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Publications of the Carancas event
Hello list members, I have just reached the Carancas' publication list site in Peru: http://fcpn.umsa.bo/fcpn/app?service=page/Planetarium_PublicationList where some articles have already been introduced by some list members, but the rest ones are not introduced yet and seem indeed interesting, although I cannot understand Spanish at all. Does anyone translate and introduce their summary? Best wishes, Katsu OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Publications of the Carancas event
Sorry the link is by Mayor de San Andres Universitys Web site (UMSA) in Bolivia. Katsu - Original Message - From: K. Ohtsuka [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Monday, October 08, 2007 11:37 PM Subject: Publications of the Carancas event Hello list members, I have just reached the Carancas' publication list site in Peru: http://fcpn.umsa.bo/fcpn/app?service=page/Planetarium_PublicationList where some articles have already been introduced by some list members, but the rest ones are not introduced yet and seem indeed interesting, although I cannot understand Spanish at all. Does anyone translate and introduce their summary? Best wishes, Katsu OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Randall joke on ebay!
That´s even better ::)) http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167029071 Stefan Ok...who is the one with the sense of humour after the carancas fragment on ebay...bidding here :-) Made me laugh anyway. http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167268481 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Sale - Nevada meteorite- Starvation Flat , Arizona- Franconia
Hi, I have a couple of meteorites for sale. Nevada meteorite Starvation Flat L-5 recently listed in the meteorite bulletin.Total mass 1250 grams . This is one of the larger pieces that I have. Most of the other pieces have been spoken for. This is the first time it has been offered for sale. 3.00 per gram for a 158 gram piece. I have two Franconia meteorites that were pictures in Meteorite Magazine August 2004 issue. I am asking $2.00 per gram. It would be hard to find specimens like these anymore. These are some of the nicest ones from the area. I have a 507 and a 617 gram. I will include in situ pictures. These meteorites can be viewed on my web page under Arizona meteorites. Email me off list for pictures. Sonny www.nevadameteorites.com Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Randall joke on ebay!
I guess Randall's 4 kilos is not enough, he needs to buy this piece as well. I am selling and shipping pieces today, anyone who wants one, no need to risk your money in Bolivia, you can have it sent out this afternoon. Mike --- Stefan Brandes [EMAIL PROTECTED] wrote: That´s even better ::)) http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167029071 Stefan Ok...who is the one with the sense of humour after the carancas fragment on ebay...bidding here :-) Made me laugh anyway. http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167268481 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] New Arizona meteorite on E bay Ad/ Sacramento Wash 02
Hi everyone I think I had this formatted wrong so I am sending it again. I apologize if it comes across twice. Thanks Hello everyone sorry to bother you with another E bay a Ad But I do have something that some of you might be interested in. It is the first piece of Sacramento Wash 02 ever offered for sale. It is a 41.4 gram fragment, it is the actual piece that ASU cut and classified as an H4 S1 W1. It fits on to the only other piece I have like a puzzle. The only other piece known was donated to ASU. So if I cut this meteorite any other material will be in the form of slices. I also have a couple of pieces of the Warm Springs meteorite on there. Thanks to Maria Haas here is a link to my E bay offerings. http://search.ebay.com/_W0QQsassZflattoprocks Thanks -- Mike Miller 230 Greenway Dr. Kingman Az 86401 www.meteoritefinder.com 928-753-6825 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD - my hand made extraordinary scale cube ending on ebay in 4 hours
Hello List, i have produced a scale cube from Seymchan meteorite material. The time for producing this cube was more than 7 hours. A realy extraordinary cube for your collection. This cube ending in 4 hours on ebay . http://cgi.ebay.com/Meteorite-extraordinary-scale-cube-SEYMCHAN-etched_W0QQitemZ300156192929QQihZ020QQcategoryZ3239QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Thank you for interest Mirko Graul IMCA#2113 www.meteorite-mirko.de Yahoo! Clever: Stellen Sie Fragen und finden Sie Antworten. Teilen Sie Ihr Wissen. www.yahoo.de/clever __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Questions about Uruacu - Shiny Black Inclusions / Images / Etching
I am processing some Uruacu and some of the pieces have huge shiny black inclusions that almost have a mirror like reflective surface. Does anyone know what these are, you can see a lot of them in this 354 gram slice: http://i131.photobucket.com/albums/p298/BobaDebt/Uruacu/354grSlice1.jpg Does anyone have any tips on photographing this material. It doesn't have a lot of contrast but the etch looks 1000% better then what this image shows: http://i131.photobucket.com/albums/p298/BobaDebt/Uruacu/354grSlice2.jpg I have tried shooting it from various angles, with and with out flash, inside, outside, nothing seems to really capture the look of the etch Speaking of the etch, does anyone have any ideas on how to get more contrast, I have tried a variety of Nitric Acid and Ferric Chloride Solutions and I have even tried various combination of both. If anyone can offer any help it would be greatly appreciated. Thanks __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Randall joke on ebay!
British humo(u)r striking again (...after that certain Proud T)?? Alex Berlin/Germany Original-Nachricht Datum: Mon, 8 Oct 2007 17:47:09 +0200 Von: Stefan Brandes [EMAIL PROTECTED] An: Meteorite-list@meteoritecentral.com Betreff: Re: [meteorite-list] Randall joke on ebay! That´s even better ::)) http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167029071 Stefan Ok...who is the one with the sense of humour after the carancas fragment on ebay...bidding here :-) Made me laugh anyway. http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBidsitem=180167268481 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NEW Angrite - NWA 4801 - AD
Dear List Members, Another week, another rare and exciting meteorite offering. I would like to introduce NWA 4801, what I feel may be the most beautiful angrite yet discovered (along with NWA 4590 Tamassint). I have loaded all that I have except for a few small fragments on eBay under my seller name, NaturesVault. Click here to see all that I currently have to offer, just scroll through the pages to see the NWA 4801 Angrite specimens: http://search.ebay.com/_W0QQsassZnaturesvault Here are a couple quick links to show the beauty and importance of NWA 4801: Photograph of slice displaying matrix and large white anorthite clasts: http://www.lunarrock.com/nwa4801/nwa4801slice.jpg Optical thin section image of a 1.5 cm wide slice in partially cross-polarized light showing clinopyroxene and olivine (colors), anorthite (white to gray) and spinels (black): http://www.lunarrock.com/nwa4801/nwa4801ts.jpg Link to the abstract on NWA 4801 for the Workshop on Chronology of Meteorites and the Early Solar System in November 2007: http://www.lpi.usra.edu/meetings/metchron2007/pdf/4050.pdf Link to abstract reporting ages of NWA 4801, NWA 4590 Tamassint and NWA 2999: http://www.lpi.usra.edu/meetings/metchron2007/pdf/4061.pdf I hope you enjoy the photos and if you are interested, Good Luck getting that special specimen for your collection! See all that I have currently have on eBay here: http://search.ebay.com/_W0QQsassZnaturesvault too many to list in this email but you will certainly see something you like! This Wednesday I have a number of other eBay auctions ending, many still at just 99 cents. There are also several specialties with Buy it Now so if you are interested in anything from planetary, ordinary to extraordinary, or 1-2 kilo lots, you will find it available by me, seller NaturesVault. Best regards and Thank You for bidding and/or looking, Greg Greg Hupe The Hupe Collection NaturesVault (eBay) [EMAIL PROTECTED] www.LunarRock.com IMCA 3163 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] SALE - Uruacu and Toluca Slices / End Cuts For Sale
Uruacu and Toluca Slices / End Cuts For Sale I etched a few pieces of Uruacu and Toluca today and wanted to post them here before I listed them on ebay. I am in the process of taking pictures and updating my web site but that will take a few days You can see some of what I have for sale on my web site at: http://home.ec.rr.com/bobadebt/Rocks/FS.htm If you check back be sure to refresh your browser to get the newest images For now here is a list of everything I have, if you would like pictures of info email me off list at bobadebt at ec.rr.com Thanks URUACU - 75 CENTS TO $1 PER GRAM These pieces look a lot better then the images, I have a difficult time capturing the etch with digital images. 354 Gram Slice $300 506 Gram End Cut $506 268 Gram End Cut $268 83 Gram End Cut $83 66 Gram Slice $49 TOLUCA - 75 CENTS PER GRAM 623 Gram End Cut $468 168 Gram End Cut $126 76 Gram End Cut $57 69 Gram End Cut $52 54 Gram End Cut $40 94 Gram Slice $70 72 Gram Slice $54 28 Gram Slice $21 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Mars Exploration Rover Update - October 8, 2007
http://marsrovers.jpl.nasa.gov/mission/status.html SPIRIT UPDATE: Rover Experiences Data Backlog - sol 1329-1336, October 08, 2007: Spirit is in good health and on the move toward an appealing field of boulders at the southwest corner of Home Plate. Preliminary data from the miniature thermal emission spectrometer indicates these boulders may be compositionally related to Comanche-class rocks first encountered on Husband Hill. Flash memory limited the rover's activities as the volume of memory in use edged up to more than 70 percent of capacity. After completing work on a 360-degree panorama from site 3, Spirit had more than 711 megabits of unsent data in flash memory, 453 of which were data from the panoramic camera. Spirit now has enough power to transmit data to Earth during overnight Odyssey passes and took advantage of two of those opportunities this week. Sol-by-sol summary In addition to starting and ending each day by measuring atmospheric dust levels (known as a tau measurement) and surveying the sky and ground with the miniature thermal emission spectrometer, Spirit completed the following activities: Sol 1329 (Sept. 29, 2007): Spirit restarted the Moessbauer spectrometer and collected data for 22 hours from a target known as Texas Chili. The rover acquired a 3-by-2-frame mosaic of images of site 3 with the panoramic camera. Sol 1330: Spirit acquired a microscopic image mosaic of Texas Chili and a bore sight of the microscopic imager with the panoramic camera to check the accuracy of its alignment. The rover then stowed the robotic arm, surveyed the external calibration target, and acquired a 5-point survey of the sky and ground with the miniature thermal emission spectrometer. During the afternoon overpass of the Odyssey orbiter, Spirit acquired data from a target known as Harmony Point2 with the miniature thermal emission spectrometer. Sol 1331: Spirit acquired a 5-by-1 image mosaic of site 3 with the panoramic camera and completed acquisition of the 360-degree panorama of the rover's surroundings as viewed from site 3. Spirit also acquired a 6-by-1 mosaic of images with the navigation camera and took thumbnail images of the sky with the panoramic camera. During the afternoon Odyssey overpass, the rover surveyed a target known as Ohridiski2 with the miniature thermal emission spectrometer. Sol 1332: Spirit acquired a 5-by-1 image mosaic of site 3 and a 4-by-1, pre-drive image mosaic with the panoramic camera. The rover bumped backward 50 centimeters (20 inches) and acquired full-color images of the work volume studied by instruments on the robotic arm using all 13 filters of the panoramic camera. Spirit drove 10.1 meters (33.1 feet) toward a target area known as site 3a, pausing to take mid-drive images with the navigation camera. The rover acquired a 5-by-1, post-drive image mosaic with the navigation camera and a 4-by-1 image mosaic with the panoramic camera. Sol 1333: Martian winds cleared away some dust from the solar panels, resulting in a 1-percent increase in solar power, or about 10 watt-hours. Total solar output for the day was 361 watt-hours (100 watt-hours is the amount of energy needed to light a 100-watt light bulb for 1 hour). Spirit surveyed the horizon with the panoramic camera and completed a full-color, systematic ground survey using all 13 filters of the panoramic camera. Sol 1334: Spirit completed a survey of rock clasts using the panoramic camera and then continued to drive toward site 3a. After the drive, the rover acquired images with the hazard avoidance cameras and a 4-by-1 image mosaic with the navigation camera. Spirit transmitted data to Odyssey during the overnight pass of the orbiter. Sol 1335: Spirit completed a 5-point survey and then a 7-point survey of the sky and ground using the miniature thermal emission spectrometer. Sol 1336 (Oct. 6, 2007): Spirit monitored dust on the panoramic camera mast assembly and acquired images with the navigation camera in support of observations with the miniature thermal emission spectrometer. The rover then completed a 7-point survey of the sky and ground as well as a systematic foreground survey with the miniature thermal emission spectrometer. Spirit transmitted data to the Odyssey orbiter during its overnight pass. The rover was slated to conduct a 5-point survey of the sky and ground the next morning with the miniature thermal emission spectrometer. Odometry: As of sol 1333 (Oct. 3, 2007), Spirit's total odometry was 7,244.32 meters (4.5 miles). __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Cassini is on the Trail of a Runaway Mystery (Iapetus)
http://www.jpl.nasa.gov/news/news.cfm?release=2007-113 Cassini is on the Trail of a Runaway Mystery Jet Propulsion Laboratory October 08, 2007 NASA scientists are on the trail of Iapetus' mysterious dark side, which seems to be home to a bizarre runaway process that is transporting vaporized water ice from the dark areas to the white areas of the Saturnian moon. This thermal segregation model may explain many details of the moon's strange and dramatically two-toned appearance, which have been revealed exquisitely in images collected during a recent close flyby of Iapetus by NASA's Cassini spacecraft. Infrared observations from the flyby confirm that the dark material is warm enough (approximately minus 230 degrees Fahrenheit or 127 Kelvin) for very slow release of water vapor from water ice, and this process is probably a major factor in determining the distinct brightness boundaries. The side of Iapetus that faces forward in its orbit around Saturn is being darkened by some mysterious process, said John Spencer, Cassini scientist with the composite infrared spectrometer team from the Southwest Research Institute, Boulder, Colo. Using multiple instruments on Cassini, scientists are piecing together a complex story to explain the bright and dark faces of Iapetus. But yet to be fully understood is where the dark material is coming from. Is it native or from outside the moon? It has long been hypothesized that this material did not originate from within Iapetus, but instead was derived from other moons orbiting at a much greater distance from Saturn in a direction opposite to Iapetus. Scientists are now converging on the notion that the darkening process in fact began in this manner, and that thermal effects subsequently enhanced the contrast to what we see today. It's interesting to ponder that a more than 30-year-old idea might still help explain the brightness difference on Iapetus, said Tilmann Denk, Cassini imaging scientist at the Free University in Berlin, Germany. Dusty material spiraling in from outer moons hits Iapetus head-on, and causes the forward-facing side of Iapetus to look different than the rest of the moon. Once the leading side is even slightly dark, thermal segregation can proceed rapidly. A dark surface will absorb more sunlight and warm up, explains Spencer, so the water ice on the surface evaporates. The water vapor then condenses on the nearest cold spot, which could be Iapetus's poles, and possibly bright, icy areas at lower latitudes on the side of the moon facing in the opposite direction of its orbit. So the dark stuff loses its surface ice and gets darker, and the bright stuff accumulates ice and gets brighter, in a runaway process. Scientists say the result is that there are virtually no shades of gray on Iapetus. There is only white and very dark. Ultraviolet data also show a non-ice component in the bright, white regions of Iapetus. Spectroscopic analysis will reveal whether the composition of the material on the dark hemisphere is the same as the dark material that is present within the bright terrain. The ultraviolet data tell us a lot about where the water ice is and where the non-water ice stuff is. At first glance, the two populations do not appear to be present in the pattern we expected, which is very interesting, said Amanda Hendrix, Cassini scientist on the ultraviolet imaging spectrograph team at NASA's Jet Propulsion Laboratory, Pasadena, Calif. Because of the presence of very small craters that excavate the bright ice beneath, scientists also believe that the dark material is thin, a result consistent with previous Cassini radar results. But some local areas may be thicker. The dark material seems to lie on top of the bright region, consistent with the idea that it is a residual left behind by the sublimated water ice. Some other mysteries are coming together. There are more data on the signature mountain ridge that gives Iapetus its walnut appearance. In some places it appears subdued. One big question that remains is why it does not go all the way around. Was it partially destroyed after it formed, or did it never extend all the way around the moon? Scientists have ruled out that it is a youthful feature because it is pitted with craters, indicating it is old. And the ridge looks too solid and competent to be the result of an equatorial ring around the moon collapsing onto its surface. The ring theory cannot explain features that look like tectonic structures in the new high resolution images. Over the next few months, scientists hope to learn more about Iapetus' mysteries. New Iapetus images, temperature maps and other visuals on Iapetus are available at: http://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini . The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages the Cassini mission for NASA's
Re: [meteorite-list] Publications of the Carancas event
Hi, Katsu, List, and Petrological Fans Everywhere, Here is a first rough cleaned-up machine translation of one of the documents on the University of San Andres website, the most recent petrographic analysis. Please, any absurdities and holes in the road are likely mine. A smart machine, the translator; it identified several usages as Costa Rican. I wonder if oine of the authors was from Costa Rica. If so, my respect for translating machines just went up... Here it is, from http://fcpn.umsa.bo/fcpn/app?service=external/PublicationDownloadsp=232 ANALYSIS by Ing. Hugo Alarcón, Docente titular de Yacimientos Minerales Metálicos Ing. Elena Gorinova, Docente Titular de Mineralogía. The polished section of a fragment of the meteorite to been observed by means of light polarized in the microscope of reflection, deciding the following minerals or metals: MINERAL COMPONENTS AND APPROXIMATE PERCENTAGES TEANITE (Alloy of Fe with Ni)25-30 % Mackiwanita-vallerita ((Fe, Ni, Cr) 9S8* 8-10% Un-identified phase1 % Rock 50 -- 60 % * This phase can be named also as TROILITE AND/OR cosmic periodotite, depending on its chemical elements and nature with relation to their origin. GENERAL DESCRIPTION OF THE SAMPLE The sample is constituted basically by a rock counterfoil, which includes fragments of teanite, troilite, of millimeter dimensions, primarily and minor dimensions to 0.5 mm secondarily, existing also as particles spread in the rock with dimensions much changed in the range from 50 to 200 microns and minors to 20 microns. (Photograph 1) TEANITE It appears in anhedral particles with a metallic sheen of soft color, generally it presents inclusions of silicates and less of troilita. The Teanite seems to be partially replaced by the rock and this way the glazing presents irregular forms. (Photograph 2) TROILITE The troilite corresponds to another phase of mineral in the sample, it is of pink color and strongly anisotrópic, very similar to periodotite, the library [literally, bibliography] characterizes this one mineral as Mackiwanita-Vallerita, a isomorphic series of sulfides of iron with Iron, Nickel, Chromium and Cobalt but it can be named Troilite when it has a cosmic origin or also cosmic perriodite. The TroIlite happens as inclusions in rock and also as inclusions in the Teanite. (Photograph 3). UN-IDENTIFIED PHASE A un-identified third phase happens as inclusions in the Teanite, the phase is of light gray color, isótropic and it might possibly be loadstone (?). (Photograph 4) ROCK The rock is characterized by presenting glazing of the silicates, and it grazes very thin, the rock has been characterized as a Peridotite in the petrographic analysis. CONCLUSIONS The studies so far of petrography as mineragraphy in the sample might indicate the sample corresponds to a METEORITE OF THE TYPE CONDRITE. The sample is characterized by the predominance of the lithic phase over the metallic phase (a pallasitic condrite or siderolite) with a hetereogenous cummulative texture and the following mineralogical composition: Orthopiroxene 70 - 73 % Olivine 5 - 6 % Condrules 2 - 3 % Fitosilicato (mafic mica?) 0.5 % Metallic Minerals8-10 % Oxides and hydroxides of Fe 3 - 4 % Glass 5 - 7 % The orthopiroxene is probably represented by the variety bronsite, is in the anhedral form, sometimes of fibrous aspect. It shows perfect exfoliation, numerous breaks and texture of printfingers. The sizes are heterogeneous, changing between thin particles of 450 micrometers of length. (Photographs 5,6). The olivine with anhedral forms is subrounded, sporadically stuffed into the intergranular spaces of the orthopiroxenes and generally it happens as heaps in the rock. Sizes of olivines are homogeneous between 70 and 100 micrometers of diameter. They are observed some light features of alteration, probably interacting in the interstices [literally, probably talking each other of idingstita.] (Photographs 7 and 8) In the very limited quantity there happens the fitosilicato (mafic mica) of a scaly aspect, the thinnest, whose exact identification needs study under the microprobe. The presence of chondrules is clear with forms that are ferrule-like [esferulìticas ?], refilled by one thinnest substance of the scaly aspect, fibrously distributed in radial form. (Photographs 9 and 10). The metallic phase happens as inclusions and diseminations in the rock. The glass occurrence is observed, formed by impact in the meteorite. IDENTIFICATION OF THE SAMPLE: METEORITE -- CONDRITE OF THE TYPE (SIDEROLITE) WITH THE LITHIC PHASE PREDOMINANT, REPRESENTED BY PERIDOTITE ( THE VARIETY: ORTHOPIROXENITE OLIVINE).
Re: [meteorite-list] Publications of the Carancas event ADDITIONAL
Hi, I downloaded all the publications on the site (URL below) and started translating then, but... One is the earlier analysis which I already translated and posted a week ago. The two PowerPoint presentations are general presentations of craters (very nicely done, BTW -- muy bueno!) but don't mention Carancas. One is a press-release style .pdf that describes the event and spends a lot of time explaining what a meteorite is, that they come from the asteroids, that there are craters elsewhere on the planet, that the world is not ending, the usual... There are a few more .pdf are press releases. The only document with any specifics is their physical estimates of the impact and such, all taken from playing with the LPI online Impact Calculator; I recognize the language! Like I haven't already done that 300 times this last week (and you too). And if you're keeping score, the Bolivians (unlike the Peruvians) got the Universal Time of the event right. Sterling K. Webb - Original Message - From: K. Ohtsuka [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Monday, October 08, 2007 9:37 AM Subject: [meteorite-list] Publications of the Carancas event Hello list members, I have just reached the Carancas' publication list site in Peru: http://fcpn.umsa.bo/fcpn/app?service=page/Planetarium_PublicationList where some articles have already been introduced by some list members, but the rest ones are not introduced yet and seem indeed interesting, although I cannot understand Spanish at all. Does anyone translate and introduce their summary? Best wishes, Katsu OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] new fall south mali.
hello list concerning the new fall south mali , or where ever it falls, we are still collecting information, for the date of fall and looking if there is any witnesses, it's realy not easy to get comunication on border's with nomades you need to send a bird to get the information.or to wait.outside that now it's ramadan and the speed is very slow. this apart, this new fall is very very fresh and it's a fantastic meteorite looking like the best fall i have seen lately , it's 90/100 a type 3.that is probaly an h chondrite, showing some beauty's inside. we will be ready with photo soon. and be ready to get a wonderfull meteorite. all the best aziz _ Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Slickensides vs Shock Veins Revisited
Hello Graham, Bernd, list While there is no technical definition of a shock vein so far as I know, it is in wide use and I hold it to be a version of a healed fracture; healed by the 1) injection or accumulation of adjacent wall melt where the filling material has an origin in high pressure, high temperature phase change or 2) formed by shock front passage: compression melting followed by decompression solidification. In the later case, material goes from crystalline solid to non crystalline liquid to non crystalline solid aka glass within a nano to micro to a second of time. Feldspars form masklynite glass but since fledspar in meteorites are usually limited to small blebs it isn't a major shock vein component. Other silicates such as olivine go through a phase change and melt only to recrystallize into the mineral ringwoodite. In this case the high pressure squeezes all the extra space out of the crystal matrix on an atomic level by repacking them but maintaining molecular bonds There are other minerals that are formed by other pyroxenes resulting in similar phase shifts (majorite, akimotoite, NaAlSi3O8--a felspar, hollandite and jadeite). Oxides such as chromite also morph. there presence of these minerals provide information about the shock history of the parent. Fractures occur when there is a physical rupture of adjacent material. It may be unhealed-- meaning a void filled only by liberated gases or it may be healed by any one of a several processes. If that process is shock melting, it is a high pressure, high temperature event where a rapid cycling of solid-melt- solid, expands to cement the adjacent sides and strengthening the fracture. As such, meteorites almost never fragment along shock veins but across them, from personal observation. When vewing under a hand lens or microscope, Ringwoodite has a dark almost black yet translucent appearance, with a slight purple hue. Maskylenite is transparent and clear. A fracture can be a slickenside filled with smectite: a low temperature,low to mid pressure, mechanical weathering mixture produced as adjacent surfaces mill and grind each other down. Separation of surfaces along these is more common as they are natural lines of weakness. Slickensides are striated and the striations generally orientated in the same direction; shock veins are smooth and may be branched. Slickensides are opaque and look like dark shale, graphite, or fusion crust in color and texture. I believe that formation of slickensides and shock veins at the same location in the same event are mutually exclusive. So as to your question. I believe that all the veins seen in this photo represent mid to low pressure, low temperature fractures of which slickensides are a subset. Without examination under a microscope, one would not be able to positively determine if any shock veins are present. Given the clear presence of slickensides and the appearance of the matrix of this meteorite to others which have an easily crumbled consistency (i.e. friable), the occurrence of shock veins is unlikely--Furthermore, it is extremely remote that any of these features are from terrestrial impact. This meteorite over all appears to have had a really brutal cosmic history. EPILOGUE: That said there is a report that slickensides in meteorites might be better interpreted as shock fractures as opposed to analogues of terrestrial slickensides. http://adsabs.harvard.edu/abs/1966Metic...3...31D Elton For more reading: http://adsabs.harvard.edu/abs/2004AGUFMMR11A0925X http://www.nsls.bnl.gov/newsroom/science/2004/06-Chen.htm http://www3.sympatico.ca/jeff.rowell/Shock.htm http://www.meteorites.com.au/features/sahara99898.html http://adsabs.harvard.edu/abs/1966Metic...3...31D http://books.google.com/books?id=ZnUPIAAJpg=PA182lpg=PA182dq=slickensides+in+meteoritessource=webots=YfWcqNTll-sig=kIPuKfITF2U4paiP_RBNB36db9g --- ensoramanda [EMAIL PROTECTED] wrote: Hi Elton, I thought these looked like shock veins...still having trouble knowing the difference between shock veins and slickenslides in this one? http://i117.photobucket.com/albums/o43/LaburnumStudio/DSCN6902.jpg Graham __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] photographing irons
Regarding photographing irons - I have had good success scanning them on a flatbed scanner. I typically use 1200 dpi and color. Note, this can produce a large file. I'll try and send a link to an image tomorrow. Laurence CMS ASU Message: 5 Date: Mon, 8 Oct 2007 15:38:56 -0400 From: David Kitt Deyarmin [EMAIL PROTECTED] Subject: [meteorite-list] Questions about Uruacu - Shiny Black Inclusions /Images / Etching To: meteorite-list@meteoritecentral.com Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original I am processing some Uruacu and some of the pieces have huge shiny black inclusions that almost have a mirror like reflective surface. Does anyone know what these are, you can see a lot of them in this 354 gram slice: http://i131.photobucket.com/albums/p298/BobaDebt/Uruacu/ 354grSlice1.jpg Does anyone have any tips on photographing this material. It doesn't have a lot of contrast but the etch looks 1000% better then what this image shows: http://i131.photobucket.com/albums/p298/BobaDebt/Uruacu/ 354grSlice2.jpg I have tried shooting it from various angles, with and with out flash, inside, outside, nothing seems to really capture the look of the etch Speaking of the etch, does anyone have any ideas on how to get more contrast, I have tried a variety of Nitric Acid and Ferric Chloride Solutions and I have even tried various combination of both. If anyone can offer any help it would be greatly appreciated. Thanks -- __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] photographing irons
some my examples http://www.imagehosting.com/show.php/1233977_WabarMin.jpg.html http://img166.imageshack.us/img166/8708/udeistation4mingh3.jpg Matteo - Original Message - Da : Laurence Garvie [EMAIL PROTECTED] A : meteorite-list@meteoritecentral.com Oggetto : [meteorite-list] photographing irons Data : Mon, 8 Oct 2007 22:26:47 -0700 Regarding photographing irons - I have had good success scanning them on a flatbed scanner. I typically use 1200 dpi and color. Note, this can produce a large file. I'll try and send a link to an image tomorrow. Laurence CMS ASU Message: 5 Date: Mon, 8 Oct 2007 15:38:56 -0400 From: David Kitt Deyarmin [EMAIL PROTECTED] Subject: [meteorite-list] Questions about Uruacu - Shiny Black Inclusions /Images / Etching To: meteorite-list@meteoritecentral.com Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original I am processing some Uruacu and some of the pieces have huge shiny black inclusions that almost have a mirror like reflective surface. Does anyone know what these are, you can see a lot of them in this 354 gram slice: http://i131.photobucket.com/albums/p298/BobaDebt/Uruacu/ 354grSlice1.jpg -- -- Does anyone have any tips on photographing this material. It doesn't have a lot of contrast but the etch looks 1000% better then what this image shows: http://i131.photobucket.com/albums/p298/BobaDebt/Uruacu/ 354grSlice2.jpg I have tried shooting it from various angles, with and with out flash, inside, outside, nothing seems to really capture the look of the etch -- -- Speaking of the etch, does anyone have any ideas on how to get more contrast, I have tried a variety of Nitric Acid and Ferric Chloride Solutions and I have even tried various combination of both. If anyone can offer any help it would be greatly appreciated. Thanks -- __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
