Acoustic characteristics of the Abu Gharadig Basin sediments, Western Desert, Egypt

Journal of African Earth Sciences (1983) Pub Date : 1987-01-01 DOI:10.1016/0899-5362(87)90083-2

A.I. Bayoumi , Y.A. Darwish , H.I. Lotfy

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引用次数: 5

Abstract

The present investigation is mainly devoted to the critical analysis of the available exploratory data obtained from more than 35 deep holes, with the aim of delineating the geo-seismic characteristic features of the different rock units existing within the conspicuous Abu Gharadig Cretaceous Basin. Such a study reveals that the base Tertiary, which is separating the strongly deformed Cretaceous reflectors from the undeformed Tertiary ones, has a medium positive reflectivity, whereas the top Alamein ‘dolomites’ (top Aptian) and the top Massajid (top Middle Jurassic) reflectors have strong positive reflectivity of the first order. Moreover, the top Apollonia (top Middle Eocene) and the top Abu Roash (top Coniacian) are found to show up with a medium of strong positive reflectivity of second order. Also, the top Dabaa (top Oligocene), top Bahariya (top Lower Cenomanian) and top Kharita (top Albian) reflectors are considered as weak variable reflectors of the third order. Implications as to the structural setting of the basin are introduced here in view of such acoustic characteristics when applied to some seismic lines in the area studied.

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埃及西部沙漠Abu Gharadig盆地沉积物声学特征

本研究主要致力于对35多个深孔的勘探数据进行批判性分析，旨在描绘阿布加拉迪格白垩纪盆地内不同岩石单元的地震特征。研究表明，将白垩系强变形反射体与未变形反射体分离的基底第三系具有中等正反射率，而阿拉曼上部白云岩(阿普梯上部)和马萨吉德上部(中侏罗统上部)反射体具有较强的一级正反射率。此外，中始新世顶部的Apollonia和Coniacian顶部的Abu Roash均存在较强的二级正反射率介质。上Dabaa(渐新统)、上Bahariya(下Cenomanian统)和上Kharita(上Albian统)反射层被认为是三级弱变反射层。鉴于这种声学特征应用于研究地区的一些地震线，本文介绍了盆地构造背景的含义。

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

Journal of African Earth Sciences (1983)

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