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首页> 外文期刊>Journal of Asian earth sciences >Seismostratigraphic architecture of the sulaiman fold-thrust belt front (Pakistan): Constraints for resource potential of the cretaceous-paleogene strata in the east gondwana fragment
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Seismostratigraphic architecture of the sulaiman fold-thrust belt front (Pakistan): Constraints for resource potential of the cretaceous-paleogene strata in the east gondwana fragment

机译：Suriaiman折叠推力带前面（巴基斯坦）的地震震动架构：东峡谷碎片中白垩纪 - 古代地层的资源潜力约束

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摘要

Interpretation of seismic reflection profiles tied to well controls allowed assessing the stratigraphic and structural style of the Sulaiman Fold-Thrust Belt (SFTB) including the Zindapir Anticline (ZA) and the adjacent Sulaiman Foredeep. Seismic attributes and facies analysis have shown that in the subsurface of the Sulaiman Foredeep, the presence of shallow marine shelfal deposits is seismically characterized by well-imaged prograding systems of the Paleocene-Eocene age. This same stratigraphic unit also contains packages of divergent reflections fanning towards the west, forming a prominent stratigraphic thickness expansion. The presence of prograding units and the occurrence of stratigraphic thickening are explained with a phase of accelerated subsidence, likely related to an early stage of the SFTB orogeny during the Indian Plate-Afghan Block collision that caused crustal flexure and the formation of an initial foreland basin to the east.Progressive deformation towards the east is evidenced by well-developed, 2-14 km wide, Neogene faulted detachment folds in the ZA area, that contrast with open folds of the same age observed further to the east, affecting the near surface strata. This recent deformation event may indicate the influence of the Indian-Afghan collisional tectonics during the Oligocene-Miocene. The evolution of the SFTB in this study has significant implications for exploration of new petroleum plays.
机译：对良好控制的地震反射曲线的解释允许评估Sulaiman折叠带（SFTB）的地层和结构风格，包括Zindapir Billinine（Za）和相邻的Suleaiman Foreep。地震属性和相片分析表明，在苏拔队的地下表面，浅海洋垫片沉积物的存在是通过古茂丙烯期的良好成像促进系统的地理表征。相同的地层单元还包含扇形西部的发散反射的包，形成突出的地层厚度膨胀。促进单元的存在和地层增厚的出现，其加速沉降的阶段解释，可能与SFTB Orogeny的早期阶段相关的印度板 - 阿富汗块碰撞导致地壳弯曲和形成初始前陆池的形成在东方的东方反弹被宣传，ZA地区的良好发达，宽阔的脱裂折叠，ZA地区的较为突出的折叠，与进一步向东观察到的开放褶皱，影响了近地表地层。该最近的变形事件可能表明印度 - 阿富汗碰撞构造在寡茂 - 中茂期间的影响。该研究中SFTB的演变对新石油剧勘探具有重大影响。

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  • 来源
    《Journal of Asian earth sciences》 |2021年第1期|104598.1-104598.15|共15页
  • 作者

    Khan Natasha; Scarselli Nicola;

  • 作者单位

    Univ Peshawar Natl Ctr Excellence Geol Peshawar 25130 Pakistan|Royal Holloway Univ London Fault Dynam Res Grp Dept Earth Sci Queens Bldg Egham TW20 0EX Surrey England|Abbottabad Univ Sci & Technol Dept Earth Sci Abbottabad Khyber Pakhtunk Pakistan;

    Royal Holloway Univ London Fault Dynam Res Grp Dept Earth Sci Queens Bldg Egham TW20 0EX Surrey England;

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

    Foreland basin; Seismic; Pakistan;

    机译：前陆盆地;地震;巴基斯坦;

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