Publications

Talangakar formation is known as one of the productive hydrocarbon reservoir formation in the South Sumatera basin. In some location in South Sumatra Basin, this formation outcrops exposed clearly which made it easy to learn the provenance characteristic of the formation. The research aims to identified and compare the sources of the Talangkar Formation, on this research showed by two main subbasin in South Sumatra Basin, Jambi Subbasin in north of the basin and South Palembang Subbasin located in Southwest of the basin.The methods on the research consist of field observation and laboratory analysis. The field obervation held by Measuring Section in two locations that Sukamoro area, Banyuasin Regency as Jambi Subbasin sample and Mendah, East OKU Regency as South Palembang Subbasin sample. Laboratory analysis performed by conglomerate clast counts and modal sandstone petrology of both samples which comparing on the outcrop characteristic and provenance of samples to identify the source of the formation.The Jambi Subbasin sample shows Quartoze Recycled settings that implied by largely occurs of granite fragment, monocrystalline quartz, plagioclase, rarely calcite and feldspar, while montmorilonite and illite shows as matrix on the section, indicate that the Talangakar Formation in Jambi Subbasin source likely form older rock such as Granite rocks basement located in northern area of the basin. Meanwhile, the Talangakar; South Palembang Subbasin sources from Transitional Arc settings due to the sample that shows the diabase and diorite fragments, while sedimentary rock rarely visible on the section, and it also shows the abundance of feldspar and plagioclase mineral, while pyroxene and some mafic minerals can still be observe. The results indicates that sources from the Talangakar Formation is diverse due to the location of the sediment deposit, though it happens in same chronological time.