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Latest Eocene and Oligocene tectonic controls on carbonate deposition in eastern Java and the south Makassar Straits, Indonesia
Journal of Asian Earth Sciences ( IF 2.7 ) Pub Date : 2021-07-27 , DOI: 10.1016/j.jseaes.2021.104900
Xiwu Luan 1, 2 , Peter Lunt 2, 3
Affiliation  

This review examines the development of carbonates and their enclosing siliciclastic sediments, from the Late Eocene until the end of the Oligocene, in eastern Java and the southern Makassar Straits. Five genetic sedimentary sequences are recognised, which correlate to other studies in the area, and points to an episodic sedimentary history controlled by tectonism. An additional intra Late Miocene uplift and unconformity is also described as it illustrates the speed at which tectonic transitions occurred. These genetic sedimentary sequences are part of a regional stratigraphic framework that describes the tectonic evolution of Sundaland. Two unconformities, in mid-Oligocene and at terminal Oligocene times, correlating across the entire eastern margin of Sundaland, are highlighted as part of a new regional tectonic model.

Quantitative approaches such as geohistory analysis are used to integrate stratigraphy with tectonic controls on accommodation space, and closely spaced wells are correlated to show abrupt facies shifts during tectono-stratigraphic transitions. A zone under the modern island of Java and continuing northeast through the centre of the Makassar Straits is, by far, the most tectonically active region, and also is the site of the largest hydrocarbon discoveries, yet is the least understood area. Measurement and mapping of the highly variable unconformities appears to be the key to understanding the development of this dynamic plate margin, and reaching a better understanding of carbonate reservoirs, all elements of petroleum systems, and the tectonic development of Sundaland.



中文翻译:

最新始新世和渐新世构造控制东爪哇和印度尼西亚南望加锡海峡碳酸盐岩沉积

这篇综述考察了从晚始新世到渐新世末期,在爪哇东部和望加锡海峡南部的碳酸盐岩及其包围的硅质碎屑沉积物的发育。确认了五个成因沉积序列,它们与该地区的其他研究相关,并指向由构造运动控制的片断沉积历史。还描述了一个额外的晚中新世内部隆起和不整合面,因为它说明了构造转变发生的速度。这些成因沉积层序是描述巽他大陆构造演化的区域地层框架的一部分。作为新区域构造模型的一部分,突出显示了与整个巽他兰东部边缘相关的渐新世中期和渐新世末期的两个不整合面。

使用地质历史分析等定量方法将地层学与可容纳空间的构造控制相结合,并且紧密间隔的井相互关联以显示构造地层过渡期间的突然相变。现代爪哇岛下的一个区域一直向东北方向穿过望加锡海峡的中心,是迄今为止构造最活跃的地区,也是最大的油气发现地点,但也是了解最少的地区。对高度可变的不整合面的测量和绘图似乎是了解这一动态板块边缘的发育以及更好地了解碳酸盐岩储层、石油系统的所有元素以及巽他大陆构造发展的关键。

更新日期:2021-08-13
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