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首页> 外文期刊>Journal of Asian earth sciences >Seismic characteristics and strontium isotope ages of the Middle Miocene Ngrayong Formation in the Madura Strait Basin: Implications for the paleogeographic reconstruction of East Java
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Seismic characteristics and strontium isotope ages of the Middle Miocene Ngrayong Formation in the Madura Strait Basin: Implications for the paleogeographic reconstruction of East Java

机译:马都拉海峡盆地中新世中格列雍组的地震特征和锶同位素年龄:对东爪哇古地理重建的启示

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摘要

East Java, on the southeastern margin of the Sundaland Shelf, is an ideal and pilot location to study paleogeographic changes due to the interactions of the Eurasian and the Indian-Australia plates. Many studies have been conducted; however, some issues remain poorly understood, such as the initial compression stage and associated paleogeography of East Java. Here, we report newly acquired high-resolution seismic data and drilling wells in the area of the Madura Strait. We systematically reconstruct a three-dimensional model on the paleogeography of East Java in the Middle Miocene in combination with others' results. Different depositional environments and characteristics of the related lithofacies observed on both sides of the Middle Miocene volcanic arc imply that weak subaerial and subaqueous volcanism existed in East Java. The extensive Ngrayong fining in the southward elastic sequences, located north of the mentioned volcanic arc, were deposited in a bathyal marine environment, which showed an oversteepening slope and basinal characteristics with outer neritic to bathyal facies within the present-day Kendeng Zone and Madura Strait area. This differs from the northern region of the present-day Rembang-Madura Inversion Zone and the northern offshore region of East Java, which were deposited in a transitional and neritic marine environment. We identified two new turbidite fans showing opposite source directions based on 3D seismic data within the Madura Strait area. Four controlling factors contributed to the formation of the Ngrayong turbidite fans, including the paleotopography of the underlying Kujung Formation, short-term intense regional tectonic events, high rates of sediment supply and occasional volcanic activity.
机译:位于Java他台架东南边缘的东爪哇省是研究因欧亚大陆板块和印度-澳大利亚板块相互作用而引起的古地理变化的理想先导位置。已经进行了许多研究。但是,一些问题仍然知之甚少,例如东爪哇的初始压缩阶段和相关的古地理。在这里,我们报告了马杜拉海峡地区新获得的高分辨率地震数据和钻井。我们结合其他人的研究结果,系统地重建了中新世中期东爪哇古地理的三维模型。在中新世中部火山弧两侧观察到的不同沉积环境和相关岩相的特征表明,东爪哇存在弱的地下和水下水下火山作用。位于上述火山弧以北的向南弹性层序中广泛的Ngrayong细屑沉积在海床海洋环境中,该海床在现今的肯登地区和马都拉海峡内显示出一种加深的斜度和盆地特征,外缘有从浅到海的海相相。区。这不同于现今伦邦-马杜拉反转带的北部地区和东爪哇的北部近海地区,它们沉积在过渡性和尖锐的海洋环境中。根据马都拉海峡地区的3D地震数据,我们确定了两个新的浊浊扇,它们显示出相反的源方向。形成Ngrayong浊浊扇的四个控制因素,包括下伏的Kujung组古地形,短期强烈的区域构造事件,高沉积物供应率和偶尔的火山活动。

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  • 来源
    《Journal of Asian earth sciences》 |2020年第1期|104109.1-104109.17|共17页
  • 作者

  • 作者单位

    China Geol Survey Qingdao Inst Marine Geol 62 Fuzhounan Rd Qingdao 266071 Peoples R China|Qingdao Natl Lab Marine Sci & Technol Funct Lab Marine Mineral Resources Qingdao 266237 Peoples R China;

    Petro China Hangzhou Res Inst Geol Hangzhou 310023 Peoples R China;

    China Geol Survey Qingdao Inst Marine Geol 62 Fuzhounan Rd Qingdao 266071 Peoples R China|Shandong Univ Sci & Technol Qingdao 266590 Peoples R China;

    China Geol Survey Qingdao Inst Marine Geol 62 Fuzhounan Rd Qingdao 266071 Peoples R China|China Univ Petr Qingdao 266580 Peoples R China;

    Ocean Univ China Coll Marine Geosci Qingdao 266100 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Middle Miocene paleogeography; Seismic facies; Turbidite fans; Formation mechanism; Ngrayong Formation; East Java;

    机译:中新世中古地理地震相浊度迷;形成机理;Ngrayong组;东爪哇;

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