Minarwan, Kemunculan volkanik di Selat Makassar itu lebih mungkin sebagai rifting volcanics, bukan subduction-related volcanics yang membentuk arc. Arc hasil subduksi di tenggara Sundaland itu ada di Lengan Sulawesi Selatan. Maka penyebaran rifting volcanics itu hanya spot-spot yang di penampang seismic punya ciri conical structures yang tak gampang dibedakan dengan build up reef. Saat Makassar Strait rifted, elevated heatflow yang mendekati ke permukaan akan punya konduit via sesar pembatas antara rifted horst dan rifted graben. Volcanics itu lalu duduk di horst block persis build up reef growth. Betul data petrokimia dari sampel volcanics ini akan menentukan tipe origin of volcanics.
salam, Awang --- On Thu, 8/27/09, MINARWAN <[email protected]> wrote: > From: MINARWAN <[email protected]> > Subject: Re: [iagi-net-l] Extending Eastern Margin of Sundaland to > Tomini-Bone Bay Line ? > To: [email protected] > Date: Thursday, August 27, 2009, 2:17 PM > Pak Awang, > > Apakah bisa jika kemunculan volkanik di Selat Makassar kita > kaitkan > dengan subduksi di bagian tenggara Sundaland? > > Mungkin dengan data geokimia jenis volkanik yang telah > ditembus oleh > sumur itu tentu akan bisa diketahui, cuma data seperti ini > pasti > rahasia deh yah. > > Salam menyimak, > mnw > > 2009/8/26 Awang Satyana <[email protected]>: > Sebelum rifting terjadi - saya tafsirkan rifting sebagai > proses > dispersi (lihat paper saya di PIT IAGI-HAGI, 2003 tentang > akresi dan > dispersi Sundaland), terjadi akresi Paternoster ke > Kalimantan, lalu > terjadi dispersi melalui rifting Selat Makassar pada > Paleogen. > Elevated heatflow terjadi di tengah Selat Makassar yang > memunculkan > beberapa volkanik di Selat Makassar sekarang (satu volkanik > telah > ditembus sumur Rangkong-1 Exxon Surumana). Gravity dan > magnetik > regional yang memotong Selat Makassar sangat kontras > menunjukkan > attenuated > > basement kontinen yang menipis akibat elevated > heatflow. > > > > salam, > > Awang > > > > > -- > - when one teaches, two learn - > http://www.geotutor.tk > http://www.linkedin.com/in/minarwan > > -------------------------------------------------------------------------------- > PP-IAGI 2008-2011: > ketua umum: LAMBOK HUTASOIT, [email protected] > sekjen: MOHAMMAD SYAIFUL, [email protected] > * 2 sekretariat (Jkt & Bdg), 5 departemen, banyak > biro... > -------------------------------------------------------------------------------- > ayo meriahkan PIT ke-38 IAGI!!! > yg akan dilaksanakan di Hotel Gumaya, Semarang > 13-14 Oktober 2009 > ----------------------------------------------------------------------------- > 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 > Pembayaran iuran anggota ditujukan ke: > Bank Mandiri Cab. Wisma Alia Jakarta > No. Rek: 123 0085005314 > Atas nama: Ikatan Ahli Geologi Indonesia (IAGI) > Bank BCA KCP. Manara Mulia > No. Rekening: 255-1088580 > A/n: Shinta Damayanti > IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ > IAGI-net Archive 2: http://groups.yahoo.com/group/iagi > --------------------------------------------------------------------- > DISCLAIMER: IAGI disclaims all warranties with regard to > information posted on its mailing lists, whether posted by > IAGI or others. In no event shall IAGI and its members be > liable for any, including but not limited to direct or > indirect damages, or damages of any kind whatsoever, > resulting from loss of use, data or profits, arising out of > or in connection with the use of any information posted on > IAGI mailing list. > --------------------------------------------------------------------- > > -------------------------------------------------------------------------------- PP-IAGI 2008-2011: ketua umum: LAMBOK HUTASOIT, [email protected] sekjen: MOHAMMAD SYAIFUL, [email protected] * 2 sekretariat (Jkt & Bdg), 5 departemen, banyak biro... -------------------------------------------------------------------------------- ayo meriahkan PIT ke-38 IAGI!!! yg akan dilaksanakan di Hotel Gumaya, Semarang 13-14 Oktober 2009 ----------------------------------------------------------------------------- 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 Pembayaran iuran anggota ditujukan ke: Bank Mandiri Cab. Wisma Alia Jakarta No. Rek: 123 0085005314 Atas nama: Ikatan Ahli Geologi Indonesia (IAGI) Bank BCA KCP. Manara Mulia No. Rekening: 255-1088580 A/n: Shinta Damayanti IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ IAGI-net Archive 2: http://groups.yahoo.com/group/iagi --------------------------------------------------------------------- DISCLAIMER: IAGI disclaims all warranties with regard to information posted on its mailing lists, whether posted by IAGI or others. In no event shall IAGI and its members be liable for any, including but not limited to direct or indirect damages, or damages of any kind whatsoever, resulting from loss of use, data or profits, arising out of or in connection with the use of any information posted on IAGI mailing list. ---------------------------------------------------------------------
