Karakteristik Petrologi dan Geokimia Batuan Gunungapi Berumur Oligosen Akhir - Miosen Di Daerah Gunung Muro, Kalimantan Tengah

Authors

  • Joko Wahyudiono Pusat Survei Geologi

DOI:

https://doi.org/10.33332/jgsm.geologi.v18i2.266

Abstract

Mount Muro is located in Purukcahu District of Central Kalimantan and geologically dominated by Late Oligocene-Miocene volcanic rocks. The purpose of this research mainly to understand the geodynamic evolution, including rock type, magmatic suites and tectonic environment during Late Oligocen to Miocene of the research area. Eight samples from that region were collected and prepared for petrographic and geochemistry analyses. Petrography analysis using polarization microscope was   carried out for rock classification, whereas XRF and ICP were used mainly to detect the presence of major, trace and rare earth elements. Based on petrographic analyses the eight rock samples studied can be classified into basalt, andesite-basalt and diorite. Cross plot of weight percent SiO2  versus weight percent (Na2O + K2O) revealed that the rocks are differentiated into basalt, andesite-basalt, basalt trachy-andesite to andesite. The weight percent SiO2 versus weight cross plot percent K2O demonstrated that rocks samples of the studied area included in calc-alkaline magmatic series. This implies that the rock samples were originally from a convergent plate margin tectonic environment. The existence of Nb through in the spider diagram has been explained in terms of retention of this element in the source during partial melting.

 

Keywords: petrology, geochemistry, tectonic, geodynamics, magmatic series

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References

Abidin, H.Z., 1996, The Tectonic History and Mineral Deposits of Tha East-Central Kalimantan Volcanic Belt, Indonesia: A Comparative Study of The Kelian Muyup and Masuparia Gold Deposits, Unpublished, PhD Thesis, Department of Geology and Geophysics, Faculty of Geoscience, The University of Adelaide, Australia.

Carlile,J.C and Mitchell, A.H.G., 1994. Magmatic arcs and gold- copper mineralisation in Indonesia, in Mineral Deposits of Indonesia- Discoveries of the past 25 years. Eds. T.M. van Leeuwen, J.W.Hadenquist, L.P.James and J.A.S.Dow. Journal of Geochemical Exploration, Special issue, 50:91-142.

Hall R., and Blundell D., 1996. Tectonic of Southeast Asia, Geological Society of London Special Publikasi No. 106, pp. 153-184.

Hall R., 2009. Sundaland: Basement Character, Structure and Tectonics Development, IPA Proceedings, 2009.

Hall, R. dan Sevastjanova, I. 2012. Australian crust in Indonesia. Australian Journal of Earth Sciences. 59. Pp. 827-844.

Hamilton, W., 1979. Tectonics of the Indonesian region. United States Geological Survey, Professional Paper, 1078.

Idrus, A., Setijadji., L.D. dan Thamba, F.,2011. Geology and Characteristics of Pb-Zn-Cu-Ag Skarn Deposit at Ruwai, Lamandau, Central Kalimantan. Jurnal Geologi Indonesia. V.6. No.4. Pp. 191-201.

Moss, S.J., A. Carter., S.Baker., A.J. Hurford., 1998. A Late Oligocene tectono-Volcanic event in East Kalimantan and the implications for tectonics and sedimentation in Borneo. Journal of the Geological Society.

Petrelli M., Poli G., Perugini D. & Peccerillo A. (2005) Petrograph: a New Software to Visualize, Model, and Present Geochemical Data in Igneous Petrology, Geochem. Geophys. Geosyst., Vol. 6, Q07011, DOI 10.1029/2005GC000932, 26 July 2005

Pollard J.P., 2008. Copper potential of the Kalimantan Surya Kencana Contract of Work, Central Kalimantan, Indonesia. www.kalimantan.com/i/pdf/2009-11-11_NR.pdf, diakses tanggal 20 Februari 2008.

Wahyudiono, J. dan Elhami Y., 2008. Laporan Akhir Penelitian Petrologi dan Geokimia Batuan Gunungapi Tersier-Kuarter Daerah Gunung Muro Kalimantan Tengah, Laporan Tak Terbit, Pusat Survei Geologi, Bandung.

Soeria-Atmadja, R., Noeradi, D. & Priadi, B., 1999. Cenozoic magmatism in Kalimantan and its related geodynamic evolution. J. Asian Earth Sci. 17, pp 25-45.

Supriatna, 1995. Peta Geologi Lembar Muaratewe, Pusat Penelitian dan Pengembangan Geologi, Bandung.

Williams, Howel, Francis J. Turner, and Charles M. Gilbert, 1982. Petrography: An Introduction to the Study of Rocks in Thin Sections. San Francisco: Freeman.

Wilson M., 1991. Igneous Petrogenesis, HarperCollins Academic, London.

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Published

2017-05-30

Issue

Vol. 18 No. 2 (2017): Jurnal Geologi dan Sumberdaya Mineral

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