Open AccessGeology Study and Granite Characteristics in Penandingan Area, Tanjung Sakti Pumi, Lahat, South Sumatra
Author(s) -
Etra Marleta Oktapiani,
Endang Wiwik Dyahastusti
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1363/1/012027
Subject(s) - geology , lithology , fault (geology) , petrography , geochemistry , lava , stratigraphic unit , lapilli , mining engineering , volcano , sedimentary rock , seismology
The study was conducted at Tanjung Sakti PUMI, southwest of Lahat regency, South Sumatra, located at 4 ° 08′19 ″- 4 ° 13′13″ LS and 103 ° 02′30 ″-103 ° 06′28″ BT with total area 63 km2 (9×7 km2). These include the Barisan Mountains which are controlled by the main Sumatran Fault that forms hills and mountains in the northwest-southeast direction. The method used in this study is a literature study based on research that has been published by previous researchers and direct field observation. Geomorphology of the study area is divided into 4 forms of land, there is a form of fluvial land, occupying 26% of the total area; the form of volcanic land, as much as 28% of the total area, the form of denudasional land occupying 31% and the rest is the form of structural land (15%). The lithologic conditions are divided into 6 units of rock, namely the Hulusimpang Formation Unit (Tomh), the Seblat Formation (Toms) black unit, the Granite unit (Tmg), above the Granite unit which is incompatible with the lapilli tuff (Qv) unit, lava (Qhv) and alluvium deposits from the transport (Qal). The geological structures developed in the research area are the fault of Masam Bulau, the horizontal fault of Tanjung Bulan, the horizontal fault of Anak Kemang and the horizontal fault of Marang Batu. Petrographic analysis was conducted as many as 25 rock samples with various rock characteristics such as granite rocks, clay stone and tuff rock