Muh Yohanes, koesoema and Choiriah, Siti Umiyatun (2006) Batas Sikuen Plio-Pleistosen dan petroleum Sistem di Daerah Blungun-Cepu, Cekungan Jawa Timur Utara. Jurnal Ilmu Kebumian Teknologi Mineral, 19 (2). pp. 71-75. ISSN 0854-2554
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Abstract
Outcrops of the erosional surface are found in Kali Blungun, Blungun and Kalimiri village, Blora, Northeast Java Basin. This erosional surface is a boundary of distinct contact between massive marls Mundu Formation (lower part), Late Pliocene / N.20, and foram sandstone of Selorejo Formation (upper) and Early Pleistocene (N.21). The erosional surface (sequence boundary) based on a new geological concept that is a sequence stratigraphy occurred by global sea level dropped (low stand sea level) during Pio–Pleistocene. The global sea level affected all of the world has also be affected Cepu area, Northern part of East Java Basin. The depositional environment of marl Mundu Formation is Outer Neritik, which caused by sea level dropped at the and of Pliocene (2,9 MA) or Plio-Pleistocene (N20 / N21). This condition changes the depositional environment to be outer Neritik. This caused the unreasonable environment for the planktonik foram. This condition resulted in the extinction of the plankton foram and deposited its to become foram sandstone of Selorejo Formation. This formation has a good porosity (35%-40%) and permeability so it is good as reservoir for gas accumulation in the Balun, about 300 meters below of Cepu city. The forming of gas Balun anticline trap is a result of compression activity process of Late Neogene (Plio-Pleistocene).
| Item Type: | Article |
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| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Ir., MT SITI UMIYATUN CHOIRIAH |
| Date Deposited: | 28 Jan 2020 05:00 |
| Last Modified: | 28 Jan 2020 05:01 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/22250 |
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