Paleoenvironment of the Miocene Lemau Formation Based on the Palynology Analysis in Seluma, Bengkulu

Sakilla Gia Mentari; Winantris Winantris; Lia Jurnaliah

doi:10.34312/jgeosrev.v5i1.17150

Paleoenvironment of the Miocene Lemau Formation Based on the Palynology Analysis in Seluma, Bengkulu

Sakilla Gia Mentari, Winantris Winantris, Lia Jurnaliah

Abstract

The Lemau Formation is a rock formation that forms the Bengkulu Basin in the Bengkulu Strip. The rocks in this formation contain hydrocarbon reserves in the form of coal. There has yet to be any research on the palynomorphs in the coal-bearing rocks in this formation. Palynomorph analysis was performed on nine samples from the P.T. Bara Indah Lestari, Seluma. The study aims to reconstruct the paleoenvironment and age of the coal-bearing rocks. The sampling technique uses stratigraphic measurements and hydrogen peroxide preparation. There were four changes in the depositional environment, namely the deposition of BIL 10-BIL 11 in the form of a freshwater peat swamp environment and BIL 12 in the form of a mangrove environment in the Early Miocene marked by the presence of Florschuetzia levipoli. The environment changed to a lagoon, indicated by the presence of foraminifera lining test and dinocyst in the deposition of BIL 13-BIL 15 samples in the Middle Miocene with a marked presence of Alnipollenites verus. The environment changed again during the deposition of BIL 16-BIL 18 to become a mangrove environment in the Middle Miocene. Overall, the paleoenvironment of the Lemau Formation is a freshwater peat swamp to a lagoon. Environmental changes are possible due to tectonic activity and climate change.

Keywords

Lemau Formations; Paleoenvironment; Palynomorph; Pollen; Spores

Full Text:

PDF

References

Adojoh, O., Adebayo, L., & Dada, S. (2015). Palynolocycles, Paleocology and System Tracts Conceps: A Case Study from Miocene Okan-1 Well, Niger Delta Basin, Nigeria. Ecology and Environmental Sciences, 3(3), 66-74. https://doi:10.12691/aees-3-3-1

Barber, A.J., Crow, M.J., & Milson, J.S. (2005). Sumatra: Geology, Resources, and Tectonic Evolution (Vol.31). London: The Geological Society. https://doi.org/10.1144/GSL.MEM.2005.031

Fajrina, D., Winantris, & Fauzielly, L. (2016). Sejarah Perubahan Iklim Berdasarkan Analisis Palinologi Daerah Derwati, Bandung, Jawa Barat. Prosiding Seminar Nasional MIPA 2016, Oktober, 198-204.

Gafoer, S., Amin, T.C., & Pardede, R. (1992). Peta Geologi Lembar Bengkulu, Sumatra, Skala 1:250.000. Bandung : Pusat Penelitian dan Pengembangan Geologi.

Haseldonckx, P. (1974). A Palynological Interpretation Of Paleoenvironmentals In SE Asia. Sains Malaysiana, 3,119-127.

Hastuti, S., Sukandarrumidi & Pramumijoyo, S. (2001). Kendali Tektonik Terhadap Perkembangan Cekungan Ekonomi Tersier Ombilin, Sumatera Barat. Teknosains,14(1), 1-12.

Heryanto, R., & Suyoko, S. (2007). Karakteristik Batubara di Cekungan Bengkulu. Indonesian Journal on Geoscience, 2(4), 247-259. https://doi: 10.17014/ijog.2.4.247-259

Husein, S., Barianto, D.H., Novian, M.I., Putra, A.F., Saputra, R., Rusdiyantara, M.A., & Nugroho, W. (2018). Persepektif Baru Dalam Evolusi Cekungan Ombilin Sumatera Barat. Proceeding, Seminar Nasional Kebumian Ke 11: Perspektif Ilmu Kebumian Dalam Kajian Bencana Geologi Di Indonesia, September 2018.

Metcalfe, I. (1996). Pre-Cretaceous evolution of SE Asian terrane (Vol. 106). London: The Geological Society, Special Publication. https://doi.org/10.1144/GSL.SP.1996.106.01.09

Morley, R. J. (1991). Tertiary Stratigraphic Palynology In Southeast Asia: Current Status And New Directions. Geological Society Of Malaysia, 28, 1-36. https://doi: 10.7186/bgsm28199101

Purnama, A.B., Salinita, S., Sudirman, Sendjadja, Y.A., & Muljana, B. (2018). Penentuan Lingkungan Pengendapan Lapisan Batubara D, Formasi Muara Enim, Blok Suban Burung, Cekungan Sumatera Tengah. Jurnal Teknologi Mineral dan Batubara, 1(1), 1-18. https://doi: 10.30556/jtmb.Vol 14.No 1.2018.182

Pulunggono, A., Agus Haryo, S., & Kosuma, C. G. (1992). Pre-Tertiary and Tertiary Fault Systems as a Framework of the South Sumatra Basin; A Study of SAR-Maps. 21st Annual Convention Proceedings Indonesian Petroleum Association (pp. 339-360). https://doi:10.29118/ipa.24.339.360

Tarigan, S. A., & Sutriyono, E. (2018). Geologi Dan Lingkungan Pengendapan Formasi Lemau Daerah Tanjungdalam Dan Sekitarnya, Bengkulu Utara (Skripsi, Universitas Sriwijaya). Diperoleh dari https://repository.unsri.ac.id/7718/

Trilaksana, M.J. (2017). Pola Struktur Geologi Dan Evolusi Tektonik Daerah Bengkulu, Lahat, Muara Enim dan Pagar Alam Cekungan Bengkulu Sumatera Selatan Berdasarkan Data Permukaan (Skripsi, Universitas Trisakti). Diperoleh dari http://repository.trisakti.ac.id

Yulihanto, B., Situmorang, B., Nurdjadjadi, A., & Sain, B. (1995). Structural Analysis of the onshore Bengkulu Forearc Basin and Its Implication for the Future Hydrocarbon Exploration Activity. 24th Annual Convention Proceedings Indonesian Petroleum Association (pp. 85-96). https://doi:10.29118/ipa.2287.85.96

Yulianto, E., Sukapti, W.S., & Setiawan R. (2019). Palinostratigrafi, Paleoekologi dan Paleoklimatologi Plistosen Awal Berdasarkan Studi Palinologi Formasi Pucangan di Daerah Sangiran. Jurnal Geologi dan Sumberdaya Mineral, 20(3), 133-141. https://doi: 10.33332/jgsm.2019.v20.3.133-141p

DOI: https://doi.org/10.34312/jgeosrev.v5i1.17150

This work is licensed under a Creative Commons Attribution 4.0 International License.

Editorial Office of Jambura Geoscience Review:

Department of Earth Science and Technology, Universitas Negeri Gorontalo

Prof. Dr. Ing. B. J. Habibie Street, Moutong, Tilongkabila, Bone Bolango Regency 96119, Gorontalo, Indonesia

Tel. +62-822-59506768 , +62-822-92284121 (Call/SMS/WA)

E-mail: geosrev@ung.ac.id

Jambura Geoscience Review (P-ISSN: 2623-0682, E-ISSN: 2656-0380) is licensed under a Creative Commons Attribution 4.0 International License.

Username
Password
Remember me