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首页> 外文期刊>Bollettino di Geofisica Teorica ed Applicata >Contribution of aeromagnetic cartography and lithostratigraphic studies to the identification of blind faults and the Cambrian deposits geometry in Jbel Saghro (eastern Anti-Atlas, Morocco)
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Contribution of aeromagnetic cartography and lithostratigraphic studies to the identification of blind faults and the Cambrian deposits geometry in Jbel Saghro (eastern Anti-Atlas, Morocco)

机译：航空磁性制图和岩石车的贡献对杰尔·塞霍（Eastern Anti-Atlas，Morocco）识别盲故障和寒武纪沉积物几何

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摘要

The study area corresponds to the Jbel Saghro mountain range located in the Moroccan eastern Anti-Atlas. The area landscape shows a Palaeozoic cover, overlying a Neoproterozoic basement. The Cambrian series present lateral thinning from east to west; this thinning is related to the rifting events occurring during the late Neoproterozoic-Cambrian period. The rifting transformed the Anti-Atlas into horsts and grabens. The grabens recorded important sedimentation through the Lower and Middle Cambrian, while at the horsts, it remained reduced. Four lithological sections were examined: Boumalne, Imiter, Taghazout West, and Taghazout, distributed respectively from west to east. The Lower Cambrian is absent in the Boumalne and Imiter, while the Middle Cambrian series show a thickening from west to east. The rifting was generalised in the Anti-Atlas domain, and produced by NE-SW trending faults. The aim of this work is to identify the deepening of these faults, relying on field and geomagnetic examinations. Several treatments were applied to the Jbel-Saghro residual magnetic field map: reduction-to-pole, horizontal gradient, and Euler's deconvolution. Numerous faults were revealed, including a NE-SW trending system interpreted as Cambrian rifting faults, and a NW-SE trending system described as late Neoproterozoic extension faults. These fault systems are considered responsible for the thickness variations of the Cambrian series along the northern flank of Jbel Saghro.
机译：研究区对应于位于摩洛哥东部反纳拉斯的Jbel Saghro山脉。该地区景观显示了一个古生代封面，覆盖着Neoproterozoic地下室。寒武纪系列从东到西方提出横向变薄;这种变薄与晚期NeoProteroZoic-Cambrian期间发生的渔序事件有关。脱离将抗真实性转化为Horsts和Grabens。通过下层和中间寒武纪，抓地造成了重要的沉降，而在Horsts，它仍然减少。检查了四个岩性部分：Boumalne，Imiter，Taghazout West和Taghazout，分布于西部到东部分布。较低的寒武纪在Boumalne和Imiter中缺席，而中间寒武纪系列展示了西向东增厚。脱离在抗阿特拉斯结构域中广泛化，并由Ne-SW趋势断层产生。这项工作的目的是确定这些缺陷的深化，依靠领域和地磁检查。将若干处理应用于JBEL-Saghro残留磁场图：还原到极，水平梯度和欧拉的去卷积。揭示了许多故障，包括被解释为寒夜脱水故障的NE-SW趋势系统，以及作为晚期内科罗古代延伸故障的NW-SE趋势系统。这些故障系统被认为负责沿着Jbel Saghro的北侧侧面的寒夜系列的厚度变化。

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