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Tectonic Evolution of Granitoid Rock Granit Garba Based on Major Element in Tanjung Beringin, Muaradua, South OKU, South Sumatra Salsyabillah Nurul Aini; Endang Wiwik Dyah Hastuti
Journal of Education, Science, Geology, and Geophysics (GeoScienceEdu) Vol. 3 No. 1 (2022): June
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceedu.v3i1.168

Abstract

Granit Garba is one of the basements that make up the Garba Hills. Research on granitoid rocks that make up Granit Garba was carried out in the village of Tanjung Beringin and its surroundings, Muaradua District, South OKU Regency, South Sumatra Province. The formation of Granit Garba occurs due to the double subduction between Meso – Tethys with Woyla Arc and West Sumatra Block. The complete subduction of the Meso-Tethys plate then caused the collision between the two plates. The characteristics and tectonic evolution of the granitoid rocks were analyzed by conducting an XRF geochemical analysis of the major elements. The results of the analysis of the major elements of granitoid rocks have SiO2 content values ​​ranging from 63.71% to 69.55% it showing that Granit Garba is composed of quartz monzonite and granodiorite. The magma affinity of the two rocks is included in the calc-alkaline series with alumina saturation levels in the form of peraluminous and showing I-type granite.
Analisis Tahapan Diagenesis Pada Batupasir Formasi Talang Akar Daerah Airbatu dan Sekitarnya, Kabupaten Banyuasin Sumatera Selatan Muhammad Raihan Mustaqim; Yogie Zulkurnia Rochmana; Endang Wiwik Dyah Hastuti
Journal of Geology Sriwijaya Vol 2 No 1 (2023): The Journal of Geology Sriwijaya
Publisher : Fakultas Teknik Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.8240496

Abstract

Batupasir merupakan salah satu batuan sedimen yang memiliki porositas dan permeabilitas yang dapat membuatnya menjadi reservoir ataupun akuifer yang berguna dalam industri perminyakan ataupun industri air tanah. Penelitian ini bertujuan untuk mengetahui proses diagenesis yang berkembang pada Batupasir Formasi Talang Akar di Daerah Airbatu termasuk fase pelarutan yang dapat meningkatkan nilai porositas ataupun permeabilitas pada batupasir tersebut. Penelitian dilakukan dengan menggunakan metode observasi dan pengambilan data lapangan serta analisis laboratorium meliputi analisis petrografi dan analisis diagenesis. Proses diagenesis yang berkembang pada Batupasir Formasi Talang Akar meliputi fase kompaksi, fase pelarutan, fase sementasi, dan authigenesis sehingga dapat diketahui bahwa batupasir tersebut telah mengalami tahapan eogenesis, mesogenesis, dan telogenesis pada kedalaman 2 Km – 3,5 Km dan suhu berkisar 60oC – 100oC pada tingkat kematangan semi-mature hingga mature ‘B’.