Dear Explorasionist, IAGI Luncheon Talk will be held on : Date: Tuesday, 7 October 2003 Time: 11.30-13.30
Venue: Andrawina-1 Room, Sahid Jaya Hotel, Jl. Jend. Sudirman No. 86 Jakarta 10220 Speaker Andang Bachtiar About the speaker Andang Bachtiar is presently the President of IAGI (Indonesian Association of Geologists), the position of which he serves from year 2000 until 2005. He used to be an explorationist with VICO Indonesia for 17 years, before decided to be independent geology consultant since year 2000. Theme: Kutai Basin Potpourri: Fact, Opinion and Controversies Abstract Kutai Basin has a unique character among the other so-called back-arc basins in Western Indonesia, especially due to its distinctive tectono-stratigraphic evolution and its very own Mahakam Delta. Despite common understanding about the basin and the delta, many subjects still being debated. This paper describes several loose facts, opinions, and some controversies related mostly to tectonic, stratigraphy, and sedimentology of the basin. They are based on contrasting published arguments on different concepts and facts, direct field observation, as well as on unpublished formal and informal discussions during several seminars, workshops, and field trips. On the tectonic subject, the aulacogen concept of the Kutai Basin formation is contrasted with the ordinary back-arc extension concept related to arc-trench system dynamics. The concept might be fit into the overall basin tectonic evolution as long as the exact timing of the aulacogen formation can be resolved. Field observation on chert pebbles in Middle Miocene conglomeratic sandstone has been used to verify the Lower-Middle Miocene tectonic event in the basin. Some loose facts on the occurrence of radiolaria in Kutai deltaic sediments may be tightened up with some more detailed analyses and synthesis to come up with possible new understanding of Miocene stratigraphy and sedimentology. The co-existence of several paleo-deltas along with paleo-Mahakam Delta has been explored and visualized to highlight the urgency of precautionary action in applying the Mahakam Delta model to any subsurface delta in the area. Other subjects to be touched upon in the potpourri includes: quartenary volcanism, clinkers vs real volcanic rocks, mahakam lowstand delta, fan-delta model in southern kutai, lithostratigraphy nomenclature for deltaic sediments, clastic-carbonate interaction in deltaic settings, lack of commercial discovery in miocene carbonate reservoirs, and west-flank & east-flank play concepts. Cost IAGI Member : Rp. 125.000,- Non IAGI Member : Rp. 150.000,- Registration Reservations and cancellations will be accepted until 11:00 am on Monday October 6, 2003. Please call Ijul / Benz at Phone / Fax : (62-21) 83702848, 83702577 or E-mail at : [EMAIL PROTECTED] No Reservations and cancellations Will be accepted after this time. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] Visit FOGRI Website: http://fogri.or.id FOGRI Archive: http://www.mail-archive.com/fogri%40iagi.or.id/ ---------------------------------------------------------------------
