#TITLE_ALTERNATIVE#

• Main Author: ALEX BERNARDUS MARBUN (NIM: 12008039); pembimbing: Dr. Ir. Dardji Noeradi, WILSON
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19675
• Institution: Institut Teknologi Bandung

Study area is located in the 375800-396200 mE and 9740200-9747530 mN (UTM-48S, WGS84) with an area of 149.532 km2 ± (20.4 km x 7.33 km) extending west - east <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> and below the surface to the data is limited to 372200 - 400000 mE and 9735200-9753400 mN (505.96 km2). Administratively, the research area is located in the District Tungkal Jaya, Banyuasin Regency, South Sumatra Province. The Geomorphology of research area consists of hilly areas which exist at an elevation of 10-75 meter asl and is formed by endogenous processes such as folding and faulting followed by exogenous processes such as weathering and erosion which shape the geomorphological manifestation and can be grouped into three units, namely Anticline Hills Unit, Syncline Hills Unit, and Homokline Hills Unit, which indicates that geomorphic processes in the research area has reach the mature stages. In Lithostratigraphy, the rocks data achived from outcrop and core/cutting in research area can be grouped into seven successive lithological unit from old to young: <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> Basement predicted to be pretertiary (?), then nonconformably overlaid by of Lemat Formation in Early Oligocene in fluvio-deltaic environment, And then deposition of Talang Akar formation at Late Oligocene-early Early Miocene in Fluvial Channel environment <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> unconformably with the underlying formations, after that Baturaja formation was deposited during early Early Miocene-middle Early Miocene in shallow marine environment conformable with the underlying formations, after that the Gumai formation conformably <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> deposited above it during middle Early Miocene-late Early Miocene in shallow-sea marine environment, after then Air Benakat Formation (sandstone-mudstone unit) was deposited <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> conformably above Gumai Formaiton during early Middle Miocene-early Late Miocene in shallow marine – offshore bar environment, after then Muara Enim Formation (Claystone inserts Coal and Claystone Unit) conformably above Air Benakat Formaiton during early Late Miocene-late Late Miocene in delta plain environment and the last deposit is Kasai formation (Tuffaceous Sandstone Unit) conformably above Muara Enim Formation at Pliocene in Fluvil-Beach (?) environment. Tectonic strain started on Oligocene-Middle Miocene generating half-graben/ syn-rift <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> deposit, then at early Middle Miocene the fault that controlled syn-rift deposit cease and leads to tectonic sagging, after that tectonic compression occured at Plio-Pleistocene which causes several Formations to be folded and faulted. Deposition of alluvial deposit until recently has covered existing units/ formations unconformably.