Pendolomitan Batugamping Formasi Rajamandala di Lintasan Gua Pawon, Bandung Barat

Sigit Maryanto

Abstract


http://dx.doi.org/10.17014/ijog.vol4no3.20095

Diagenetic process records could be observed based on the petrography and XRD mineralogy labo- ratory analyses from thirty-two samples of limestone taken from the Rajamandala Formation at Pawon Cave Section, West Bandung. These laboratory analyses show that the rocks have partially been affected by a dolomitization. The dolomitization recorded at the limestone is a fabric selective dolomitization of the rock matrix, continued to the whole components of the limestone. The dolomite crystals are generally idiotopic to xenotopic mosaic rhombohedral in shapes with fine to moderate crystal sizes. Dolomite mainly consists of magnesium ion initiated from water formation trapped soon after the rock deposited. The middle part of the Rajamandala Formation, which is commonly affected by dolomitization is generally associated with meteoric water dissolution and creates several caves.

 


Keywords


dolomite; fabric selective; petrography; meteoric dissolution; cave

References


Bemmelen, R.W. van, 1949. The Geology of Indonesia, Vol. IA, General Geology. Martinus Nijhoff, The Hague. Netherlands, 732 h.

Choquette P. W. dan Pray, L . W., 1970. Geological Nomenclature and Classification of Porosity in Sedimentary Carbonates. American Association of Petroleum Geologist Buletin, 54, h. 207-50.

Clements, B. dan Hall, R., 2007. Cretaceous to Late Miocene Stratigraphic and Tectonic Evolution of West Java. Proceedings Thirty-First Annual Convention and Exhibition Indonesian Petroleum Association, May 2007.

Dunham, R.J., 1962. Classification of Carbonate Rocks According to Depositional Texture. In: W.E. Ham (ed.), Classification of Carbonate Rocks. American Association of Petroleum Geologist Memoir, 1, h. 108-121.

Embry, A.F. dan Klovan, J.E., 1971. A Late Devonian Reef Tract on North-Eastern Banks Island, North West Territory. Bulletin of Canadian Petroleum Geology, 19, h. 730-781.

Flügel, E., 1982. Microfacies Analysis of Limestones. Springer- Verlag Inc., Berlin, Heidelberg, New York, 633 h.

Hall, R., Clements, B., Smyth, H.R., dan Cottam, M.A., 2007. A New Interpretation of Java’s Structure. Proceedings Thirty-First Annual Convention and Exhibition Indonesian Petroleum Association, May 2007.

Harting, A, 1929. Tagogapoe. Fourth Pacific Science Congress. Geological Survey Bandoeng, 14 h.

James, N.P., 1991. Diagenesis of Carbonate Sediments. Notes to Accompany a Short Course. Geological Society of Australia, Jeffrey, B.M., 2008. Facies Characterization and Mechanism of Termination of a Tertiary Carbonate Platform: Rajamandala Formation, West Java (Abstract). 2008 Joint Annual Meeting of Celebrating the International Year of Planet Earth. 5-9 October 2008, Houston, Texas

Maryanto, S., Mulyono, dan Sihombing, T., 2008. Laporan Penambahan Data Sekunder Dengan Metode Geostatistik Mineralogi pada Batugamping Formasi Rajamandala di Daerah Citatah, Bandung Barat dan Sekitarnya, untuk Mendukung Penelitian Cekungan Bandung. Laporan Teknis Intern Pusat Survei Geologi, Bandung.

Musper, K.A.F.R., 1939. Report on Field Work in June – July 1939. Geological Survey of Indonesia. Unpublished report.

Sibley, D.F. dan Gregg, J.M., 1987. Classification of Dolomite Rock Textures. Journal of Sedimentary Petrology, 57, h. 967-975.

Siregar, M.S., 2005. Sedimentasi dan Model Terumbu Formasi Rajamandala di Daerah Padalarang, Jawa Barat. Jurnal Riset Geologi dan Pertambangan, 16, (1), h. 61-80.

Sudjatmiko, 2003. Peta Geologi Lembar Cianjur, Jawa, Skala 1 : 100.000. Pusat Penelitian dan Pengembangan Geologi, Bandung.

Tabri, K.N., 2006. Studi Fasies Batugamping dan Pola Kekar dalam Peningkatan Efisiensi Produksi Tambang Batu Ornamen/Marmer Komersial di Daerah Gunung Guha, Desa Cihea, Kec. Bojongpicung, Kab. Cianjur. Jurnal Geoaplika, 1, (1), h. 031-045.

Tucker, M.E. dan Wright, V.P., 1990. Carbonate Sedimentology. Blackwell Scientific Publications, Oxford, London, Edinburg, Cambridge, 482 h.

Wilson, J.L. 1975. Carbonate Facies in Geologic History. Springer-Verlag, New York, Heidelberg, Berlin, 471 h.


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