#TITLE_ALTERNATIVE#

• Main Author: NOVIAN SAPUTRA (NIM 12006054), WAHYU
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/13891
• Institution: Institut Teknologi Bandung

The research area is located administratively at Karang Dalam village, Lahat Regency, South Sumatera Province and geographically at UTM zone -48 334000 mE – 337500 mE and 9572000 mN– 9568500 mN, which covers area around ± 12,25 km2 (3,5km x 3,5 km). Geomorphological units in the research area are divided into three units, that are Complex Ridge, Terrace and Flood Plain, Volcanic Ridge Units. The research area is divided into four stratigraphy units from the oldest to the youngest in age, which are Sandstone unit, Claystone unit, Volcanic Breccias Unit, and Alluvium Unit. Geological structures which can be identified are northwest-southeast dipped beds, three strike slip faults with northeast-southwest orientation. Geological history of the research area was started in Early Miocene with the development of South Sumatera Basin, which was indicated by deposition of Sandstone Unit Gumai Formation in Midlle Early Miocene (N7) that bed was deposited in middle - outer neritic, subsequently Claystone Unit of Gumai Formation was deposited during Late Early Miocene(N8). Then a tectonic compression happened during Pliocene with trend north - south which caused the development of strike slip fault in the surrounding areas such as Puntang Fault, Kuba Fault, Asam Fault. Then during quarter there is a deposition of volcanic breccias. Present days alluvium unit deposited on the Sandstone Unit and Claystone Unit, along Lematang River. There are geochemistry data gathered in the research area, in claystone unit Gumai Formation. Geochemistry analysis data taken from sample code KDL-09 and LMT-11. Geochemistry interpretation from HI vs Tmax graphic show that LMT-11 has been mature in the oil zone. This data show that Gumai Formation role as a source rock in the South Sumatera Basin’s petroleum system.