Implikasi Biomarka pada Karakteristik Geokimia Organik Sedimen Polaman-1 (PLM-1) Formasi Ngrayong, Cekungan Jawa Timur Utara

Salsabila, Darin (2021) Implikasi Biomarka pada Karakteristik Geokimia Organik Sedimen Polaman-1 (PLM-1) Formasi Ngrayong, Cekungan Jawa Timur Utara. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Telah dilakukan analisis biomarka fraksi hidrokarbon alifatik dan aromatik pada sedimen PLM-1 Formasi Ngrayong untuk mengetahui implikasinya terhadap karakteristik geokimia organik. Analisis biomarka dilakukan melalui metode ekstraksi, fraksinasi, serta identifikasi struktur senyawa menggunakan Kromatografi Gas-Spektrometri Massa (KG-SM). Pola distribusi bimodal senyawa ¬n-alkana, parameter seperti CPI (1,30); OEP (1,19); LHCPI (0,03); Wax Index (0,21); ACL (28,83); AlkTerr (0,39); n-C17/n-C31 (0,03); n-C29/n-C17 (32,67); n-C31/n-C19 (36,81) serta beberapa senyawa fraksi hidrokarbon aromatik menunjukkan masukan bahan organik dari berbagai sumber. Rasio C31αβ 22S/(22S+22R)>1 serta keberadaan senyawa hopanoid dengan konfigurasi bb dan ba menunjukkan tingkat kematangan sedimen yang rendah. Selain itu, teridentifikasinya senyawa de-A-lupana dan C31 homohopana mengindikasikan bahwa sedimen terendapkan dalam lingkungan yang bersifat oksik. Analisis biomarka yang dilakukan terhadap sampel sedimen PLM-1 Formasi Ngrayong menunjukkan karakteristik geokimia organik seperti masukan bahan organik dari berbagai sumber, tingkat kematangan yang rendah, serta lingkungan pengendapan yang bersifat oksik. ================================================================================================ Biomarker analysis of aliphatic and aromatic hydrocarbon fractions in the PLM-1 sediment of the Ngrayong Formation has been carried out to determine the implications for organic geochemical characteristics. Analysis of biomarkers was carried out through extraction, fractionation, and identification of compound structures using Gas Chromatography-Mass Spectrometry (GC-MS). Bimodal distribution pattern of n-alkane compounds, parameters such as CPI (1,30); OEP (1,19); LHCPI (0,03); Wax Index (0,21); ACL (28,83); AlkTerr (0,39); n-C17/n-C31 (0,03); n-C29/n-C17 (32,67); n-C31/n-C19 (36,81) as well as some compounds of the aromatic hydrocarbon fraction indicate the input of organic matter from various sources. The ratio of C31αβ 22S/(22S+22R)>1 and the presence of hopanoid compounds with configurations of bb and ba indicate a low level of sediment maturity. In addition, the identification of de-A-lupane and C31 homohopane compounds indicated that the sediment was deposited in an oxic environment. Biomarka analysis conducted on PLM-1 sediment samples of the Ngrayong Formation showed organic geochemical characteristics such as input of organic matter from various sources, low maturity level, and oxic depositional environment.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Biomarka, Sedimen Polaman, Formasi Ngrayong, Hidrokarbon Alifatik, Hidrokarbon Aromatik, KG-SM. Biomarkers, Polaman Sediments, Ngrayong Formation, Aliphatic Hydrocarbons, Aromatic Hydrocarbons, KG-SM
Subjects: Q Science > QD Chemistry
Q Science > QD Chemistry > QD251.2 Chemistry, Organic. Biochemistry
Q Science > QD Chemistry > QD471 Chemical compounds - Structure and formulas
Q Science > QD Chemistry > QD63 Extraction
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User: Darin Salsabila
Date Deposited: 29 Aug 2021 18:33
Last Modified: 29 Aug 2021 18:33
URI: https://repository.its.ac.id/id/eprint/90501

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