Putri, Wahyu Dwi (2021) Investigasi Biomarka Sebagai Indikator Sumber Senyawa Organik dan Kematangan Termal Batuan Sedimen Polaman 4 (PLM-4) Formasi Ngrayong, Cekungan Jawa Timur Utara. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Investigasi biomarka untuk mengetahui karakteristik geokimia organik batuan sedimen Polaman 4 (PLM-4) Formasi Ngrayong telah dilakukan menggunakan Kromatografi Gas-Spektrometri Massa (KG-SM). Hasil analisis kromatogram menunjukkan adanya kelimpahan n-alkana rantai medium (n-C19 – n-C26) dan n-alkana rantai panjang (n-C27 -n-C37), senyawa hopanoid, de-A-lupana, alkil benzena, serta kalamena. Dominasi n-alkana rantai panjang terhadap pendek, keberadaan senyawa de-A-lupana, kalamena, alkil benzena, hopanoid, serta rasio Paq sebesar 0,4 mengindikasikan senyawa organik berasal dari berbagai sumber, antara lain tumbuhan tingkat tinggi terrestrial, bakteri, serta makrofita akuatik. Keberadaan senyawa 17β(H)-22,29,30-Trisnorhopana, 17β(H), 21β(H)-Hopana,17β(H),21α(H)-30-Normoretana, nilai rasio C29ββ/αβ > 0,15; C31αβS/(S+R) < 1, serta nilai parameter CPI > 1 mengindikasikan sedimen memiliki tingkat kematangan yang rendah. Kelimpahan senyawa kalamena, senyawa de-A-lupana, dan beberapa senyawa hopanoid juga mengindikasikan lingkungan pengendapan bersifat oksik.
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Investigation of biomarker to determine the organic geo-chemistry characteristics of Polaman 4 (PLM-4) sedimentary rock Ngrayong Formation has been carried out using Gass Chomatography-Mass Spectrometry (GC-MS). The result of the chromatogram analysis showed the abundance of medium chain n-alkanes (n-C19 - n-C26) and long chain n-alkanes (n-C27 – n-C37), hopanoid compounds, des-A-lupane, alkyl benzene, and calamene. The dominance of long chain to short chain n-alkanes, the presence of des-A-lupane, calamene, alkyl benzene, hopanoids, and Paq ratio of 0.4 indicates organic compounds derived from various sources, including terrestrial higher plants, bacteria, and aquatic macrophytes. The presence of 17β(H)-22,29,30-Trisnorhopane, 17β(H), 21β(H)-Hopane, 17β(H),21α(H)-30-Normoretane, the ratio value of C29ββ/αβ > 0,15; C31αβS/(S+R) < 1, and the CPI parameter value > 1 indicates the sediment has low maturity level. The abundance of calamene, des-A-lupane, and some hopanoid compounds also indicates an oxic depositional environment.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | biomarka, Formasi Ngrayong, kematangan, KG-SM, sedimen Polaman, biomarker, Ngrayong Formation, maturity, GC-MS, Polaman sediment |
| Subjects: | Q Science > QD Chemistry > QD471 Chemical compounds - Structure and formulas |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Wahyu Dwi Putri |
| Date Deposited: | 31 Aug 2021 03:26 |
| Last Modified: | 31 Aug 2021 03:26 |
| URI: | http://repository.its.ac.id/id/eprint/90798 |
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