Identifying fault system and basement depth using aeromagnetic data beneath the Jahamah Platform, NE Sirt Basin, Libya

IF 0.9 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Acta Geodynamica et Geomaterialia Pub Date : 2022-04-21 DOI:10.13168/agg.2022.0005

Sufian Kahoul

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Abstract

The Jahamah Platform is a part of a structural depression called the Sirt basin, located in the northern central part of Libya. The Jahamah Platform spans latitude 29.95 ° N to 30.55 ° N and longitudes 19.32 ° E to 19.77 ° E with an estimated area of about 2,187 km 2 . Libyan Petroleum Institute provided the data of aeromagnetic that was used in this study. The data was used to study the structure beneath the Jahamah Platform by using Oasis montaj software. Various filters from the software have been applied to enhance determining the fault system within the study area. An RTP filter was applied to the magnetic data to construct a reduction to the pole anomaly map. The subsurface structural elements underneath the study area were identified using Total horizontal derivative (THD), CET analysis, and Euler deconvolution. 2-D forward modelling of the area was constructed based on gravity data, and then the basement depth was estimated to range from km to 3.1 km based on the model. Based on the interpretation of the constructed maps, the area has a number of faults that trend in NE-SW, NNW-SSE, N-S and NW-SE and faults depth ranging between 790 m to 3102 m.

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利用航空地磁数据识别利比亚东北苏尔特盆地贾哈马地台下的断层系统和基底深度

贾哈马地台是位于利比亚中北部的一个名为苏尔特盆地的构造洼地的一部分。Jahamah平台横跨北纬29.95°至30.55°，东经19.32°至19.77°，估计面积约2187平方公里。利比亚石油研究所提供了本研究中使用的航磁数据。利用Oasis montaj软件对Jahamah平台下的结构进行了研究。软件中的各种滤波器已被应用于增强对研究区域内故障系统的确定。RTP滤波器被应用于磁性数据，以构建极点异常图的简化。使用总水平导数（THD）、CET分析和欧拉反褶积确定了研究区域下方的地下结构元素。根据重力数据建立了该地区的二维正演模型，然后根据该模型估计基底深度为km至3.1km。根据已绘制地图的解释，该地区有许多断层，走向为NE-SW、NNW-SSE、N-S和NW-SE，断层深度在790米至3102米之间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Geodynamica et Geomaterialia 地学-地球化学与地球物理

CiteScore

2.30

自引率

0.00%

发文量

期刊介绍： Acta geodynamica et geomaterialia (AGG) has been published by the Institute of Rock Structures and Mechanics, Czech Academy of Sciences since 2004, formerly known as Acta Montana published from the beginning of sixties till 2003. Approximately 40 articles per year in four issues are published, covering observations related to central Europe and new theoretical developments and interpretations in these disciplines. It is possible to publish occasionally research articles from other regions of the world, only if they present substantial advance in methodological or theoretical development with worldwide impact. The Board of Editors is international in representation.