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首页> 外文学位 >Structural styles and tectonic evolution of the Bandar Abbas area, southern Iran: A model based on geologic, satellite, and geophysical data.
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Structural styles and tectonic evolution of the Bandar Abbas area, southern Iran: A model based on geologic, satellite, and geophysical data.

机译：伊朗南部阿巴斯港地区的结构样式和构造演化：基于地质，卫星和地球物理数据的模型。

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摘要

The structural styles in the Bandar Abbas area are dominantly controlled by two major tectonic features. The first is two sets of extension faults in the basement--an older NW-SE-trending set that is probably of late Precambrian age, and a younger, N-S-trending set perhaps of Permo-Triassic age. The first set is interpreted as incipient continental rifting which is not well-developed, but which has formed widespread zones of weakness throughout the Afro-Arabian continent and Iran. These zones are demarcated by discrete axial lineaments such as the Main Zagros Thrust (MZT), the proto-Red Sea trend, and the Najd Shear Zone of Arabia. The N-S basement faults were apparently fully developed rift basins, along one of which Iran separated from Arabia to form the Neo-Tethyan Ocean during Late Triassic-Early Jurassic time. The second major tectonic feature is a set of N-trending fracture zones (e.g. Oman Line and Kazerun fault), whose effects are manifest as dextral strike-slip faults within the Phanerozoic sedimentary rocks. The observed surface structural styles, such as whaleback folds, faults, salt diapirism, and scattered magmatic intrusions and outpourings, are regarded as the result of intermittent reactivation of basement structures.;Results from studies of these data, along with pertinent evidence from the literature, suggest that a major continental collision between Arabia and Iran may have occurred just after ophiolite obduction in Oman and Iran at ;Post-collisional deformation in southern Iran is dominated by strong right-lateral strike-slip faults coupled with high-angle thrusting. Surface features such as the NE-trending sinistral faults on Landsat imagery indicate clockwise rotation of the N-S-oriented basement faults, which still show sinistral strike-slip faults along their original trends within the sedimentary section. (Abstract shortened with permission of author.).
机译：阿巴斯港（Bandar Abbas）地区的构造样式主要受两个主要构造特征控制。第一个是地下室中的两组伸展断层-一个较旧的NW-SE趋势集可能是前寒武纪时代晚期，一个较年轻的N-S趋势集可能是Permo-Triassic时代。第一组被解释为初期大陆裂谷，它并不发达，但已在整个非洲阿拉伯大陆和伊朗形成了广泛的薄弱区域。这些区域由离散的轴向线划定，例如主要的Zagros推力（MZT），原始红海趋势和阿拉伯的Najd剪切区。 N-S地下断层显然是完全发育的裂谷盆地，在三叠纪-早侏罗世时期，伊朗沿着该裂谷盆地之一与阿拉伯分离，形成了新特提斯洋。第二个主要的构造特征是一组N向断裂带（例如阿曼线和Kazerun断裂），其作用表现为生代沉积岩中的右旋走滑断裂。观察到的表面结构样式，例如鲸背褶皱，断层，盐成岩作用以及散布的岩浆侵入和倾泻，被认为是基底结构间歇性重新活化的结果;;这些数据的研究结果以及文献中的相关证据，表明在阿曼和伊朗的蛇绿岩引诱之后，阿拉伯和伊朗之间可能发生了一次重大的大陆碰撞；伊朗南部的碰撞后变形主要由强烈的右走向走滑断层和高角度冲断作用所主导。诸如Landsat影像上的NE趋势性左旋断层之类的表面特征表明，N-S取向的基底断层沿顺时针方向旋转，仍然沿沉积区内的原始趋势显示了左旋走滑断层。 （摘要经作者许可缩短。）。

著录项

  • 作者

    Bushara, Mohamed Nurein.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Geology.;Remote sensing.
  • 学位 Ph.D.
  • 年度 1991
  • 页码 424 p.
  • 总页数 424
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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