The structural geology of the High Central Zagros revisited (Iran)
The structural geology of the High Central Zagros revisited (Iran)
复制标题
重访扎格罗斯中部高地的构造地质学（伊朗）
DOI：
10.1144/1354-079304-646
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发表时间：
2005
影响因子：
1.7
通讯作者：
S. Ehsani
中科院分区：
文献类型：
--
作者：
A. Bosold;W. Schwarzhans;A. Julapour;A. Ashrafzadeh;S. Ehsani
本研究的主要目的是在Lordegan和Yasuj乡镇附近的高中央扎格罗斯地区调查高扎格罗斯断层（HZF）的性质和邻近前陆的构造样式。第二项任务是确定扎格罗斯前陆的多产石油区带是否会延伸到研究区域，以及是否可以识别新的石油区带。两个选定的横截面和一个就在后面的HZF提供的逆掩性质的证据。在某些地方，HZF表现出一个低角度的逆冲面，局部有大量的逆冲作用在前陆之上。解释的依据是地表地质测绘、现有的钻井数据、卫星遥感数据、航磁和高分辨率重力测量数据、大地电磁、广角反射折射剖面测量和反射地震数据。这套独特的新获得的地球物理数据的整合补充了最近发表的论文，这些论文更多地基于地表地质和相当有限的地下数据。综合这些数据，构建了一个区域平衡横截面，并为所调查的地区提出了构造油气藏概念。在高扎格罗斯的逆冲断层和次冲断层中都可能存在油气勘探潜力。对地表背斜宽度的分析（或者更精确地说：它们的频率）给出了滑脱面深度的第一个指示。在邻近的扎格罗斯前陆，在普遍存在的霍尔木兹深水层之上，即在Kazhdumi和Pabdeh-Gurpi地层的水平上，发现了多个拆离面存在的证据。这些中间的滑脱面被认为是产生更深的构造作用的原因，而这些构造作用与在地表观察到的构造无关。
The main purpose of this study in the High Central Zagros area near the townships of Lordegan and Yasuj was to investigate the nature of the High Zagros Fault (HZF) and the structural styles in the adjacent foreland. A second task was to determine whether the prolific petroleum plays productive further out in the Zagros Foreland would extend into the study area and if new petroleum plays could be recognized. Two selected cross-sections across and one just behind the HZF provide evidence for its overthrust nature. In some places the HZF exhibits a low-angle thrust plane, locally with a substantial amount of thrusting over the foreland. The interpretation is based on surface geological mapping, available well data, remote sensing from satellite data, aeromagnetic and high resolution gravimetry data, magnetotelluric, WARRP (wide angle reflection refraction profiling) and reflection seismic data. The integration of this unique set of newly acquired geophysical data complements recently published papers, which were based more on surface geology and rather limited subsurface data. The data were integrated to construct a regional balanced cross-section and to develop structural petroleum play concepts for the area investigated. Play potential may exist both in the overthrust terrain of the High Zagros as well as in the subthrust. Analysis of the width of the surface anticlines (or more precisely: their frequency) gives a first indication of the depth of the décollement plane. Within the adjacent Zagros Foreland evidence was found for the presence of multiple detachment planes above the ubiquitous deep Hormuz level, i.e. at the level of the Kazhdumi and the Pabdeh–Gurpi Formations. These intermediate décollement planes are thought to be responsible for the generation of deeper structural plays unrelated to the structuring that can be observed at the surface.