SERPIH SILAT DAERAH NANGASERAWAI, KABUPATEN SINTANG, PROVINSI KALIMANTAN BARAT DAN POTENSINYA SEBAGAI SERPIH GAS
Abstract
Serpih Silat termasuk di dalam Cekungan Melawi yang terendapkan pada lingkungan lakustrin dan delta.Satuan ini tersusun oleh batuan serpih berwarna abu-abu kehitaman-kecoklatan, struktur laminasi,
menyerpih, keras dan getas. Setempat-setempat terdapat sisipan batupasir halus berwarna kelabu
kekuningan.
Hasil analisis geokimia organik dan maseral pada conto serpih terindikasi mengandung material organik
dengan kategori sedang-baik. Material organik tersebut terdiri dari maseral vitrinit dan liptinit. Maseral
vitrinit berasal dari tumbuhan tinggi, dan maseral liptinit berasal dari lemak tanaman atau alga laut.
Berdasarkan hasil analisis TOC, kandungan organik pada serpih tersebut berkisar 0,54 -1,15%, yang
merupakan kerogen tipe III dan campuran antara kerogen tipe 11/111. Kerogen tipe III memiliki
kecenderungan untuk menghasilkan gas, sedangkan campuran kerogen tipe IIIIII memiliki
kecenderungan menghasilkan gas dan minyak.
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