Reintepretation of Lampung Cretaceous-Paleogene Granitoids Genesis and Its Tectonic Implications

Reintepretasi Genesa Pembentukan Granitoid Lampung Berumur Kapur-Paleogen dan Implikasi Tektoniknya

Authors

  • Angga Jati Widiatama Program Studi Teknik Geologi, Institut Teknologi Sumatra, Indonesia; Pusat Riset dan Inovasi Teknologi Mineral dan Kebumian, Institut Teknologi Sumatra, Indonesia
  • Rezki Naufan Hendrawan Program Studi Teknik Geologi, Institut Teknologi Sumatra, Indonesia; Pusat Riset dan Inovasi Teknologi Mineral dan Kebumian, Institut Teknologi Sumatra, Indonesia

DOI:

https://doi.org/10.20956/geocelebes.v6i2.19633

Keywords:

Granitoid, Lampung, tectonostratigraphy, Woyla-West Sumatra

Abstract

Granite in Lampung Province is widely exposed but not much has been discussed so that it is still causing debate, especially in the context of the tectonic episode of its formation. This study aims to reconstructed formation of the Lampung granitoid in a tectonostratigraphic framework. The research was carried out by mapping the field in four places, Tanjung Bintang, Branti, Padean, and Tarahan to reconstructed genesis of granitoid formation using a tectonic approach based on the order of rock age. This study shows that the Lampung granitoids can be divided into three different tectonostratigraphy, are subduction related granitoids, collision-delamination granitoids, and post-orogrnic granitoids. Subduction related granitoids characterized by granitoid to tonalite lithology that cross cutting metamorphic rocks. Collision-delamination related granitoids are characterized by migmatite to leucogranite and foliated granodiorite. Post-orogenic collapse granitoids characterized by microgranite associated with mafic-intermediet rock such as basalt, diabas, and andesite.

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Published

2022-10-31

How to Cite

Widiatama, A. J., & Hendrawan, R. N. (2022). Reintepretation of Lampung Cretaceous-Paleogene Granitoids Genesis and Its Tectonic Implications: Reintepretasi Genesa Pembentukan Granitoid Lampung Berumur Kapur-Paleogen dan Implikasi Tektoniknya. JURNAL GEOCELEBES, 6(2), 135 - 144. https://doi.org/10.20956/geocelebes.v6i2.19633

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Vol. 6 No. 2: October 2022

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