摩洛哥东北部航磁资料的处理与分析

Hafsa Boufkri, D. E. Azzab, A. Miftah, M. Charroud
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引用次数: 0

摘要

摩洛哥东北部以其采矿潜力而闻名,因此发现新的构造准则对于发现新的矿化是必不可少的。事实上,应用航空磁技术在发现新的构造事故和突出大部分被第四纪沉积盖层隐藏的磁源方面是有效的。为此,在研究区航空资料调查的基础上,利用强大的算子(极降、向上延拓、欧拉反褶积),建立了磁异常图。详细的地图显示:(1)在Oujda和Saka地区,与第三纪和第四纪火山熔岩部分露头有关的强磁化带与集中在三叠纪地层中的铁、锰矿化有关。(2)磁响应相对较低的区域来自于乌伊达地区小地堑内充填的玄武岩锥。(3)低磁化带对应于第四纪和第三纪盖层或三叠系—侏罗系矿床。建立了以深断裂为重点的磁线图,确定了NE-SW与ENE-WSW和E-W两个主要走向,由于其深度达2 km,因此被认为是海西期和阿尔卑斯构造的主要继承者。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Processing and Analysis of aeromagnetic data of North-Eastern Morocco
: The North-Eastern of Morocco was widely known for its mining potential, so discovering new structural guidelines was indispensable to find out new mineralization. Indeed, applying airborne magnetic techniques proves its efficiency in underlining new tectonic accidents and highlighting magnetic sources mostly hidden by Quaternary sedimentary covers. A magnetic anomaly map was established to attain this goal, basing on powerful operators (reduction to the pole, upward continuation, and Euler deconvolution), made on airborne data surveys of the study area. The elaborated map shows: (1) zones of strong magnetizations related to the Tertiary and Quaternary volcanic lavas partly outcropping in the Oujda and Saka regions to the iron and manganese mineralization concentrated in the Triassic beds. (2) Zones of relatively low magnetic response came from basaltic cones filled in a small graben at Oujda region. (3) Zones of low magnetization corresponded to the Quaternary and Tertiary cover or the Triassic-Jurassic deposits. We have established a magnetic lineaments map that emphasized deep faults, two main trends have been identified: NE-SW with ENE-WSW and E-W, they are considered as a major’s accidents because their depth reach to 2 km, as much as they inherited from the Hercynian and Alpine tectonics.
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