Advances in Earth Science ›› 2022, Vol. 37 ›› Issue (3): 253-267. doi: 10.11867/j.issn.1001-8166.2021.080
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Weimin RAN 1 , 2( ), Xiwu LUAN 3( ), Xinyuan WEI 4, Yintao LU 5, Hong LIU 1 , 2, Chuanhong YE 3, Jia WANG 4, Qing HU 3, Dandan ZHANG 2
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Weimin RAN, Xiwu LUAN, Xinyuan WEI, Yintao LU, Hong LIU, Chuanhong YE, Jia WANG, Qing HU, Dandan ZHANG. Middle Miocene Sedimentary Characteristics and Main Controlling Factors in the Southern Margin of Kalimantan Island[J]. Advances in Earth Science, 2022, 37(3): 253-267.
Kalimantan Island is located in central Southeast Asia. Since the Cenozoic, the most significant tectonic feature of Kalimantan Island has been that it experienced counter-clockwise rotation as a result of plate tectonic movement in Southeast Asia. This study focuses on the regional tectonic-sedimentary response characteristics of large-scale tectonic events in Southeast Asia during the Miocene. Based on a systematic review of the characteristics of the Miocene delta sedimentary system in the Kutei Basin (Southeast Kalimantan Island), and the analysis of the characteristics of the Miocene semi-deep bathyal slope and basin floor sedimentary system in the East Java Basin (South Kalimantan Island), this paper comprehensively discusses the characteristics and sedimentary response to the Miocene regional tectonic inversion in the southern margin of Kalimantan Island. Approximately 15 Ma during the Middle Miocene, a large-scale Mahakan progressive delta depositional system was formed. According to the drilling and seismic data constraints, the initial development time of the Miocene semi-deep bathyal slope and basin-floor sedimentary system in the East Java Basin is approximately 16-15 Ma. The initial development times of the two sedimentary systems were similar. The paper holds that the large-scale tectonic inversion events during the Middle Miocene in Southeast Asia are the main controlling factors for the development of the two sedimentary systems in the southern margin of Kalimantan Island. In the same period, the open deep-water environment of the Kutei Basin and the East-West narrow extended semi-deep bathyal environment of the East Java Basin created sufficient space for the development of a large-scale progradational delta sedimentary system in the Kutei Basin and semi-deep bathyal turbidite in the East Java Basin.