Memang Morley mempublikasikan bersamaan dengan publikasi east african rift. Tapi kalau dia menggunakan east african rift apakah justru akan menunjukkan non mrine yg lebih banyak, btw saya ngga memiliki referensi ini : ref :Morley, C. K. 1999 Comparison of hydrocarbon prospectivity in rift systems. In Continental rifting in East Africa, structural and sedimentary geometries, processes and evolution: as revealed by hydrocarbon exploration (ed. C. K. Morley). American Association of Petroleum Geologists Special Publication.
Yang lebih jelas ada di konklusinya : moga-moga definisi synrifnya sama dengan yg kita persepsikan. === quote == 7. Conclusions (1) The occurrence of hydrocarbons in rift basins is strongly controlled by the style of post-rift tectonics and the nature of the basin- ll stratigraphy. Rifts with sag basins contain most of the known recoverable oil reserves, and rifts with marine fillll are more prolific than non-marine rifts. ================ end quote On 2/22/06, Awang Satyana <[EMAIL PROTECTED]> wrote: > Wah saya tak bilang syn-rift tak bisa marin. Coba deh diperjelas dulu > definisi syn-rft yang jadi diskusi ini, sebab syn rift itu tak hanya syn-rift > as a whole, ia juga punya banyak stages-nya seperti peri-graben, inferior, > dst sampai ke late syn-rift yang memang marin menjelang post-rift dan sagging. > > Saya hanya menyoroti bahwa itu non-marine untuk early stages of syn-rift. > Saya pikir Christ Morley banyak menganalogikan soal syn-rift nya dari > beberapa penelitian lapangannya di East African Rift System. Coba cek di AAPG > Bull. > > Dan, jangan lupa mengaitkannya ke sejarah termal mantel di bawahnya, sebab > rifting hanya ekspresi di crust, ada domain termal yang mengendalikannya di > bawah sana. > > salam, > awang > > Rovicky Dwi Putrohari <[EMAIL PROTECTED]> wrote: > Marine syn-rift why not ? > > Hydrocarbons in rift basins: the role of stratigraphy By Joseph J. > Lambiase and Christopher K. Morley yg diterbitkan Royal Society. > Menyebutkan ada kemungkinan juga bahwa syn-rift terisi oleh marine > sedimen. > Namun dalam jumlah minyak yg dihasilkan oleh source rock synrift > sesuai statistic yg dibuat oleh Morley, (1999), hanya 1 % yg berupa > simple syn-rift marine, 1% untuk marine synrift and pasive margin, > namun 53% untuk marine synrift and sag. > > === quote > > The distribution of the reserves is skewed very heavily towards rifts > that have a sag basin associated with them; ca. 88% of all the > reserves, or 1:79 1011 barrels, occur in rifts with sag basins > (figure 13). Marine syn-rift and sag basins account for approximately > 1:06 1011 barrels, or 53% of the total, while 4:8 1010 barrels, or > 24%, occur in non-marine syn-rift and sag basins and 13% (2:5 1010 > barrels) in non-marine syn-rift and marine sag basins. Surprisingly, > marine simple rifts account for only 1% or 2 109 barrels. > > == end quote > > Pasti deh kepingin papernya :) > aku cuplik abstractnya saja ya dibawah sana ... > > RDP > ============================== > Hydrocarbons in rift basins: the role of stratigraphy > > J. J. Lambiase, C. K. Morley > > Abstract: > > Hydrocarbon occurrence and distribution in rift basins is largely a > product of the stratigraphic succession in the syn- and post-rift > phases of basin evolution. Most of the known reserves of recoverable > hydrocarbons occur in rifts with post-rift sag basins and in those > basins that are dominated by marine fill. Simple rifts and passive > margins are significantly less prolific. Key factors are the style of > post-rift tectonics and whether the basin fill is dominated by > non-marine or marine strata. Tectonically derived topography is the > prime control on both sedimentary processes and facies distribution, > which results in a consistent geographical and stratigraphic > distribution of hydrocarbon source rocks, reservoirs and seals in > syn-rift successions. Potential reservoirs are abundant throughout the > syn- and post-rift successions and include a wide variety of sandstone > and, less commonly, carbonates. Source rocks occur less frequently and > are restricted to specific stratigraphic horizons; their presence or > absence is one of the limiting factors in hydrocarbon distribution. > Good seals tend to be uncommon in continental syn-rift successions and > their absence often prevents the formation of hydrocarbon > accumulations. Seals are more common in post-rift successions and > widespread in marine syn-rift successions. The reserve distribution is > largely controlled by seal distribution, which is best in sag-basin > successions and in basins filled with marine strata. A strategy for > the efficient exploration of rift basins can be derived from post-rift > basin geometry and the nature of the stratigraphic fill. Plays can be > developed that identify the most prospective areas within the syn- and > post-rift successions by predicting the distribution of hydrocarbon > source rocks, reservoirs and seals from stratigraphic architecture. > > -- > http://rovicky.blogspot.com > --Writer need 10 steps faster than readeR -- > > --------------------------------------------------------------------- > To unsubscribe, send email to: iagi-net-unsubscribe[at]iagi.or.id > To subscribe, send email to: iagi-net-subscribe[at]iagi.or.id > Visit IAGI Website: http://iagi.or.id > IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ > IAGI-net Archive 2: http://groups.yahoo.com/group/iagi > Komisi Sedimentologi (FOSI) : Ratna Asharina > (Ratna.Asharina[at]santos.com)-http://fosi.iagi.or.id > Komisi SDM/Pendidikan : Edy Sunardi(sunardi[at]melsa.net.id) > Komisi Karst : Hanang Samodra(hanang[at]grdc.dpe.go.id) > Komisi Sertifikasi : M. Suryowibowo(soeryo[at]bp.com) > Komisi OTODA : Ridwan Djamaluddin(ridwan[at]bppt.go.id atau [EMAIL > PROTECTED]), Arif Zardi Dahlius(zardi[at]bdg.centrin.net.id) > Komisi Database Geologi : Aria A. Mulhadiono(anugraha[at]centrin.net.id) > --------------------------------------------------------------------- > > > > > --------------------------------- > Yahoo! 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