Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.precamres.2014.03.009 |
Reappraisal of strain estimations and measurement methods in the Hammamat Group sediments: Comparison of primary and secondary grain fabrics with new data from Wadi Zeidun and Wadi Arak basins, CED, Egypt | |
Fowler, A.1; Abdeen, M. M.2 | |
通讯作者 | Fowler, A. |
来源期刊 | PRECAMBRIAN RESEARCH |
ISSN | 0301-9268 |
EISSN | 1872-7433 |
出版年 | 2014 |
卷号 | 247页码:1-32 |
英文摘要 | In this study, pebble and sand grain shape and orientation data from undeformed and deformed conglomerates and sandstones in the Egyptian Central Eastern Desert (CED) Wadi Zeidun and Wadi Arak basins were collected, with the aim of providing more accurate tectonic strain estimations for deformed Hammamat sediments by comparing their primary and secondary sedimentary fabrics. Common assumptions about primary pebble fabrics and pebble deformation behaviour in previous strain studies of the region are shown to be invalid. This raises doubts about the accuracy of earlier reported strain estimates for the Hammamat that were based on such assumptions. For low strains in the Hammamat sediments, the best strain measurement method is normalized Fry (NFry) analysis of sand grain centre-to-centre distance data. An alternative is conventional Fry analysis of pebble ellipse centre-to-centre distance data, provided that large numbers of pebbles (similar to 300) are used, and the pebbles form closely packed aggregates with high degrees of anticlustering. This study also provides systematic guidelines for pebble axial length and orientation measurements in the field. The progressive changes in the mechanical behaviour of pebbles with increasing bulk strain are discussed. (C) 2014 Elsevier B.V. All rights reserved. |
英文关键词 | Strain measurement Strain data collection methods Hammamat basins |
类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates ; Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000336821300001 |
WOS关键词 | CENTRAL EASTERN DESERT ; ARABIAN-NUBIAN SHIELD ; CENTER-TO-CENTER ; PEBBLE ORIENTATION ; SHEAR ZONES ; FRY METHOD ; HISTORY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/184455 |
作者单位 | 1.United Arab Emirates Univ, Dept Geol, Al Ain, U Arab Emirates; 2.Natl Author Remote Sensing & Space Sci NARSS, Cairo, Egypt |
推荐引用方式 GB/T 7714 | Fowler, A.,Abdeen, M. M.. Reappraisal of strain estimations and measurement methods in the Hammamat Group sediments: Comparison of primary and secondary grain fabrics with new data from Wadi Zeidun and Wadi Arak basins, CED, Egypt[J],2014,247:1-32. |
APA | Fowler, A.,&Abdeen, M. M..(2014).Reappraisal of strain estimations and measurement methods in the Hammamat Group sediments: Comparison of primary and secondary grain fabrics with new data from Wadi Zeidun and Wadi Arak basins, CED, Egypt.PRECAMBRIAN RESEARCH,247,1-32. |
MLA | Fowler, A.,et al."Reappraisal of strain estimations and measurement methods in the Hammamat Group sediments: Comparison of primary and secondary grain fabrics with new data from Wadi Zeidun and Wadi Arak basins, CED, Egypt".PRECAMBRIAN RESEARCH 247(2014):1-32. |
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