PENENTUAN LINGKUNGAN PENGENDAPAN LAPISAN BATUBARA D, FORMASI MUARA ENIM, BLOK SUBAN BURUNG, CEKUNGAN SUMATERA SELATAN
DOI:
https://doi.org/10.30556/jtmb.Vol14.No1.2018.182Kata Kunci:
lapisan batubara D, lingkungan pengendapan, blok Suban Burung, cekungan Sumatera SelatanAbstrak
Lapisan batubara D termasuk ke dalam Blok Suban Burung, Formasi Muara Enim, Subcekungan Palembang Tengah, Cekungan Sumatera Selatan, berumur Miosen Tengah sampai Miosen Akhir. Penelitian ini bertujuan untuk mengetahui karakteristik batubara dan lingkungan terhadap percontoh Lapisan Batubara D dari kegiatan pengeboran penelitian gasifikasi bawah permukaan. Metode yang digunakan adalah analisis petrografi batubara, nilai reflektansi vitrinit, dan interpretasi lingkungan pengendapan berdasarkan diagram Diessel dan diagram Calder. Lapisan batubara ini didominasi oleh vitrinit, rata-rata sekitar 71,1%, diikuti inertinit 17,6%, liptinit 5,9%, dan mineral 6,4%. Nilai reflektansi vitrinit berkisar antara 0,25-38%, termasuk ke dalam peringkat lignit-subbituminus. Berdasarkan hasil rekonstruksi lingkungan pengendapan menggunakan empat parameter TPI (Tissue Preservation Index), GI (Gelification Index), GWI (Ground Water Index) dan VI (Vegetation Index) dan diplot dalam diagram Diessel dan diagram Calder diketahui bahwa Lapisan Batubara D diendapkan dalam lingkungan pengendapan limnik.
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