INDIKASI KETERDAPATAN ENDAPAN PLASER PEMBAWA TIMAH DAN UNSUR TANAH JARANG (REE), DI PERAIRAN TODAK, SINGKEP, KEPULAUAN RIAU

Udaya Kamiludin, I Nyoman Astawa, Moch. Akrom Mustafa

DOI: http://dx.doi.org/10.32693/jgk.13.2.2015.266

Abstract


Penelitian geofisika di Perairan Todak, Singkep, Kepulauan Riau menggunakan seperangkat peralatan seismik pantul dangkal saluran tunggal. Tujuan penelitian ini adalah untuk menunjang penelitian keterdapatan endapan plaser pembawa timah dan unsur tanah jarang (REE). Hasil interpretasi rekaman seismik diperoleh terdapatnya lembah/mangkuk yang terbentuk secara alami akibat adanya terobosan batuan granit, di mana lembah/mangkuk-mangkuk ini merupakan tempat terjadinya sedimentasi dari hasil pelapukan batuan di sekitarnya. Hasil interpretasi rekaman seismik pantul saluran tunggal analog di perairan Todak, Singkep, dapat diklasifikasikan menjadi 3 runtunan yaitu runtunan A, B, dan runtunan C.

Kata kunci Data seismik, endapan plaser, lembah/mangkuk, Perairan Todak.


Geophysical research at Todak, Singkep, Riau Archipelago Province, by using single channel sahllow seismic refletion. The purpose of research is to support placer deposit bearing tin and rare earth element research at this area. From seismic interpretation can be recognized the distribution of valley/bowls which is naturally formed, caused by granite rock intrusion. Those valleys are sedimentation places of wheathered rock from the surrounding area. Beside that, the seismic research also for determining the placer deposit thickness. Interpratation of analog single channel seismic records in the Todak waters, Singkep, result 3 seismic sequences and intrusive feature, A sequences, B, and C.

Keywords: Seismic data, placer deposit, valley/basin, Todak Watres.


Keywords


Data seismik; endapan plaser; lembah/mangkuk; Perairan Todak

References


Batchelor, B.C., 1983. Late Cenozoic Coastal and Offshore Stratigraphy in Western Malaysia and Indonesia, Thesis Ph.D., Dept. Of Geology, University Malaya, Kuala Lumpur.

Camm, G.S., dan Hosking, K.F.G., 1985. Stanniferous Placer Development on an Evolving Landsurface with Special Reference to Placers Near St Austell, Cornwall, Journ. Geological Soc. Vol. 142, No. 5, p803-813.

Cameron, N.R., Clarke, M.C.G., Aldiss, D.T. Aspden, J.A. & Djunuddin, A. 1980. The geological evolution of Northern Sumatera. Proceeding of the Indonesian Petrolium Association, 9th Annual Convention, 149-187.

Cobbing, E.J., 1992, The Granite of the South-East Asia Tin Belt, British Geological Survey, London.

Gafoer, S., Amin, T.C. Setyogroho, B. 1972. The Geological Map of Indonesia. Palembang Quadrangle Scale 1:10,000,000. GRDC, Bandung.

Hamilton, W., 1979. Tectonics of the Indonesia Region. United States Geological Survey, Professional Paper 1078.

Katili, J.A. 1969. Permian Volcanism and Its Relation to the Tectonic Development of Sumatera. Bull. Volcan., 33, p. 530-540

Mustafa, M.A., Kamiludin, U., Astawa, I.N., Surachman, M., Kurnio, H., 2014. Laporan Penelitian Keterdapatan Endapan Plaser Pembawa Timah dan Unsur Tanah Jarang (REE), di Perairan Pantai Todak dan Sekitarnya, Singkep, Provinsi Kepulauan Riau. Pusat Penelitian dan Pengembangan Geologi, Bandung, laporan intern, tidak dipublikasi.

Ringis, J., 1986. Seismic Stratigraphy in Very High Resolution Shallow Seismic Data, CCOP, Tech. Pub. 17, p. 115-126.

Sutisna, K., G. Burhan, dan B. Hermanto, 1994. Peta Geologi Lembar Dabo, Sumatera, Pusat Penelitian dan Pengembangan Geologi, Bandung.




DOI: http://dx.doi.org/10.32693/jgk.13.2.2015.266

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