He he he gara gara presentasi kemarin ya pak Awang ?.
Maklum di kantor semua istilah pake bahasa perancis sehingga akhirnya
refleksnya apa yang sering didengar itu.
Tapi akibatnya bahasa jadi campur aduk, kecuali bahasa padang tetap lancar
.......
Memang repot kalau kerja ditempat yang bahasa pengantarnya bukan indonesia
atau inggris, kalau kita nggak ikutan berbahasa itu bahaya...bisa bisa
orang ngata-ngatain kita didepan kita tanpa kita sadari .....
itu sering terjadi lho .... didua pihak lagi he he he ....teman teman bule
ngomongin teman yang nggak berbahasa perancis (nggak banyak juga yang bisa
kan) didepan orangnya...atau yang lebih serign sih kita ngata ngatain bule
didepan orang itu tanpa dia tau (misalnya sial wong ini kok bau banget sih
tadi udah mandi belum ya .... )
Kakak saya (Zulharmen Zed dari Petrochina) bilang dia juga terpaksa belajar
bahasa mandarin ..... wah kalau ini sih lebih repot kayaknya karena nggak
ada mirip miripnya dengan inggris
Ngomong ngomong katanya BPMigas mengeluarkan dekrit yang mengharuskan semua
komunikasi harus dalam bahasa Indonesia, temen temen bule udah pada ribut
apa bener ?.
salam
yuriza
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| | Awang Satyana |
| | <[EMAIL PROTECTED]|
| | oo.com> |
| | |
| | 20/01/2006 02:29 |
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| Subject: Re: [iagi-net-l] Need info : Mud Volcano
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Cretace inferieur yang dimaksud Bu Yuriza itu maksudnya Kapur Bawah, maklum
Bu Yuriza suka keceplosan bicara Prancis he..he..
Ya memang kalau di passive margin seperti Congo, Angola, Campos Brazil,
GOM juga Makassar dan Tarakan baik salt maupun shale bisa punya dua peranan
: (1) sebagai detachment/decollement/bidang gelincir - yang nanti pada saat
deformasi akan menjadi floor/toe thrust, dan (2) sebagai massa yang
bergerak (hialokinesis atau argilokinesis) ke atas dan membentuk semua
perangkap yang berhubungan dengan diapir (rim synclines, turtle back
structure, domal trap, sub-salt structure). Kalau diapir serpih cukup dekat
ke permukaan (kedalaman 1500 meter) dan menemukan lines of weakness seperti
sesar2, maka sering terjadi diatremas - seperti rambut2 menuju permukaan
dan di permukaan (sea bed atau onshore) diletuskan sebagai mud volcanoes.
Keberadaan pockmarks di sea bed bisa mengindikasi akar-akar diatremas ini.
Kedua peranan di atas dapat dilihat dengan jelas di seismic sections yang
berarah barat-timur di Tarakan deep offshore (Nunukan, Bukat, Ambalat, East
Ambalat blocks). Di situ banyak toe-thrust structures yang membentuk trap
dengan shale sebagai decollement, tetapi ke depannya menuju timur, banyak
free-reflector zones di seismik yang menunjukkan keberadaan diapir serpih.
salam,
awang
[EMAIL PROTECTED] wrote:
Pak Shofi,
Setahu saya di daerah Congo dan Angola (dan juga belahannya di america
selatan bagian timur : misalnya Campos basin di Brazil), mempunyai bidang
luncur (decolement surface) yang sama yaitu lapisan garam yang 'tumbuh
disana' setelah rifting pada cretace inferieur ....orang orang menyebut
structur yang tergelincir disana rado alias raft alias rakit ...
Si salt ini selain jadi bidang gelincir memang suka naik keatas jelas
kelihatan diseismic ...
Setahu saya lagi kalau di daerah Nigeria bidang gelincirnya berupa shale
dan setahu saya shale ini ada dibawah dan tidak kelihatan naik naik
diseismiknya menjadi mud volcano ..... tapi saya itu cuma kerja disatu blok
kok di africa barat jadi mestinya nggak tahu banyak ......
Mudah mudahan ada yang bisa cerita banyak ....
salam
yuriza
|---------+---------------------------->
| | Shofiyuddin |
| | | | l.com> |
| | |
| | 19/01/2006 03:30 |
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| | Please respond to|
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Mas Minarwan dan rekan, terima kasih untuk infonya. Sumur yang sedang
drilling ada di basin Caspian sea and akhir tahun drilling di offshore
Morocco.
Oh ya, dari penampang seismic, ketinggiannya bisa mencapai ribuan meter dan
pelemparan sampai puluhan kilometer.
sekali lagi, terima kasih.
On 1/19/06, Minarwan wrote:
>
> Mas Shofi, hasil bertanya kepada Google:
>
> Mud Volcanoes, Shale Diapirs, and Fluid Systems:
> Making Mud Pies on a Grand Scale
>
> Lesli J. Wood
>
> ABSTRACT:
>
> Mud volcanoes are explosive "mud mounds" that sometimes reach several
> tens of kilometers in diameter and can be hundreds of meters high.
> They are found principally in convergent-margin settings around the
> world. These settings are most commonly areas of rapid sedimentation,
> lateral tectonics, or geologically recent magmatic activity. Although
> thousands of mud volcanoes have been documented in both subaerial and
> submarine settings, it is likely that hundreds of thousands exist. In
> the larger picture, mud volcanoes are only a single component; they
> are the pressure release valves, if you will, of the larger systems
> that lie at depth: mobile shale basins. Mobile shale basins occur
> throughout the world. Some examples are the North Sea, the Caspian
> Sea, offshore Morocco, Niger Delta, Mackenzie Delta, the Barbados
> Accretionary Prism, offshore Trinidad, New Zealand, Borneo, Venezuela,
> onshore Texas, and the Gulf of Mexico. Mobile shale basins may be
> characterized by buried diapirs, shale walls, and deep mobile shale
> bodies that exhibit no explosive nature.
>
> Mobile shales have their own internal means of propulsion. When shale
> burial depths reach certain diagenetic transition zones, such as the
> montmorillonite to illite transition limit (approximately 100 degrees
> C) the result is expulsion of lattice-locked water and rise of fluid
> pressure in the shales. Fluid increase can also happen due to thermal
> expansion of pore fluids or hydrogen gas generation during subsidence.
> Active tectonic movement can not only destabilize fluidized shales but
> can also compress deep shales with an explosive result similar to
> squeezing a mud pie in both hands. These systems, unlike salt, can go
> through long periods of dormancy while their fluids "recharge" until
> another phase of migration occurs.
>
> Mud volcanoes and shale diapirs are erratic phenomena that influence
> fluvial, coastal, and marine sedimentation in complex ways. Shale
> mobility rise or subsidence can cause changes in base level, and
> uplifts can alter river courses and affect upstream and downstream
> sediment types, avulsion histories, channel pattern, and channel
> locations. Deltaic systems prograde around uplifted diapirs and
> volcanoes and often dump significant sediment loads due to these local
> changes in accommodation space and base level. Volcanoes and diapir
> activities in the offshore environment likely have a similar effect on
> shelfedge, slope, and deep marine depositional systems, although the
> effect of active tectonics on these marine systems is poorly
> understood. Mud volcano fields are often associated with gas hydrate
> development in deep marine environments. The combination of eruptive
> seafloor volcanoes and easily destabilized frozen methane (gas
> hydrate) in the shallow seafloor create the potential for explosive
> submarine landslides, methane release into the oceans and atmosphere,
> tsunamis, and both offshore and onshore infrastructure destruction.
>
> Lalu ada lagi bahan kuliah tentang Mud Volcano/Shale Diapir (bukan
> Salt Diapir) dari Institut Teknologi Trinidad & Tobago:
> http://www.gstt.org/teaching/origin.html
>
> Sedangkan mengenai salt diapir (yang setahu saya tidak sama dengan mud
> volcano atau shale diapir), mungkin bisa dicari juga di Google.
>
> Min
>
> On 1/19/06, Shofiyuddin wrote:
> > Matur nuwun mas,
> > kalo mau pesen di siapa ya? ada yang mau bantu? Kebetulan sekarang lagi
> > monitor untuk sumur sumur di pantai barat afrika juga mid afrika, deket
> > deket bekas jajahannya sovyet dulu, yang kayaknya drilling cukup worry
> > mengingat beberapa rig blow out gara gara menembus lapisan yang diduga
> > sebagai mud volcano atawa salt diapir.
> > Aku tunggu khabarnya. Mudah mudahan ada yang mau bantu aku, mas
Syaiful,
> > tolong dong.
> >
> > Salam
> >
> > Shofi
> --
> Minarwan
> Skype me: minarwan
>
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Salam hangat
Shofi
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