REKONSTRUKSI PALEOBATIMETRI DAN PENENTUAN BATAS PENGENDAPAN BERDASARKAN KELIMPAHAN FORAMINIFERA: STUDI KASUS PADA SEDIMEN INTI SO189/2-04KL DI CEKUNGAN BENGKULU

Taufan Wiguna (Balai Teknologi Survei Kelautan, Badan Pengkajian dan Penerapan Teknologi (BPPT))
Sri Ardhyastuti (Pusat Teknologi Reduksi Risiko Bencana, Badan Pengkajian dan Penerapan Teknologi (BPPT))

Jurnal Riset dan Rekayasa Kelautan
Vol. 2 No. 1 (2021): Oseanika: Jurnal Riset dan Rekayasa Kelautan - Juni 2021

[Paleobathymetry Reconstruction and Depositional Boundary Based on Foraminifera Abundance: a Case Study on So189/2-04kl Sediment Core in Bengkulu Basin] Paleobathymetry reconstruction and deposition boundary determination in an oil and gas industry has been used widely to study geological history on a basin. Those approaches could be done by microfossil proxy, including use of foraminifera. Using the foraminifera abundance and P/B ratio, this study tries to reconstruct paleobathymetry and determine depositional boundary on sediment core SO189/2-04KL 600-900 cmbsf in Bengkulu Basin. As a result, both parameters show paleobathymetry changes between outer neritic and inner bathyal. Inner bathyal only appear on interval 780-785 cmbsf. Maximum flooding surface appear on depth 640, 736.5, and 825 cmbsf while transgressive surface appears on depth 701, 765, and 890 cmbsf. Keywords: paleobathymetry, maximum flooding surface transgressive surface, P/B ratio, foraminifera abundance