Geologi dan Analisis Mikrofasies dalam Penentuan Lingkungan Pengendapan Batugamping Formasi Kalipucang Daerah Urug, Kecamatan Jatiwaras, Kabupaten Tasikmalaya, Provinsi Jawa Barat
Abstract
Formasi Kalipucang sebagai kelompok batuan karbonatan yang terdiri dari satuan batugamping terumbu dan batugamping klastik berumur Miosen Tengah dijumpai pada daerah penelitian. Penelitian dilakukan di Desa Urug dan sekitarnya, Kecamatan Jatiwaras, Kabupaten Tasikmalaya, Provinsi Jawa Barat dengan tujuan untuk mengidentifikasi jenis fasies serta menentukan lingkungan pengendapan batugamping pada daerah penelitian. Metode pengumpulan data yang digunakan dalam penelitian ini ialah pemetaan geologi yang meliputi pengamatan singkapan, pengukuran, dan pengambilan pemerconto batuan yang selanjutnya akan melalui tahap analisis laboratorium berupa analisis petrografi. Berdasarkan hasil analisis pada 8 (delapan) sampel batugamping, maka diperoleh 3 (tiga) fasies yang meliputi wackestone or floatstone which whole fossils, bioclastic packstone or wackstone with worn skeletal grain, dan grainstone or packstone with abundant foram. Mengacu pada model fasies oleh Wilson [16], daerah penelitian terendapkan pada Platform Interior – Open Marine (FZ 7) dan Platform Interior – Restricted (FZ 8).
The Kalipucang Formation is a group of carbonate rocks consisting of reef limestones and clastic limestones of the Middle Miocene age that was found in the study area. The study was conducted in the village of Urug and its surroundings, Jatiwaras District, Tasikmalaya Regency, West Java Province to identify the types and determine the limestone depositional environment in the study area. The data collection method used in this study is geological mapping which includes outcrop observations, measurements, and rock sampling which will then go through a laboratory analysis stage in the form of petrographic analysis. Based on the analysis results on 8 (eight) limestone samples, 3 (three) facies were obtained which include wackestone or floatstone which whole fossils, bioclastic packstone or wackestone with worn skeletal grain, and grainstone or packstone with abundant forams. Referring to the facies model by Wilson [16], the research area was deposited on the Interior Platform – Open Marine (FZ 7) and Interior Platform – Restricted (FZ 8).
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DOI: https://doi.org/10.31284/j.semitan.j.2022.v1i1.4946
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