Document Details

Document Type : Article In Journal 
Document Title :
Fracture Analysis and Tectonic Implications of Hajjah District, Yemen Arab Republic
تحيل شروخ منطقة حجة بالجمهورية اليمنية ودلالاتها التكتونية
 
Subject : Earth Sciences 
Document Language : English 
Abstract : The pre~ent study principally deals with quantitative analysis of fractures in both Precambrian rocks including metavolcanics, metagabbros, syntectonic granitoids and late-tectonic granitoids as well as sedimentary rocks of Jurassic Period exposed in Hajjah district located at the northwestern part of Yemen Arab Republic. Aerial photographs and field work were utilized to identify the fracture~. 1202 fractures of a total length of 1421.8 kilometers were identified. A multi-stage procedure is adopted for their recognition. The preferred orientations of the fracture pattern are WNW and NW for Precambrian rocks, and ENE and NNE for sedimentary rocks. Highest fracture density is reported in metagabbros. The structural pattern of the present area is governed mainly by faulting and less by folding. The fracture pattern is compatible to a large extent with the major tectonic trends identified in Yemen Arab Republic. The recognized fracture pattern is believed to belong to two different episodes. The WNW pattern (Red Sea trend) occurred during the Najd Orogeny (Late- Proterozoic-Cambrian). The ENE and NE pattern (Gulf of Aqaba trend) belongs to Post Jurassic Orogeny. 
ISSN : 1012-8832 
Journal Name : Earth Sciences Journal 
Volume : 2 
Issue Number : 1 
Publishing Year : 1409 AH
1989 AD 
Number Of Pages : 14 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد ثروت صلاح هيكل MOHAMED T. S. HEIKALResearcher  

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