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DOI | 10.1134/S0016852114060041 |
Finite strain analysis of metavolcanics and metapyroclastics in gold-bearing shear zone of the Dungash area, Central Eastern Desert, Egypt | |
Kassem, Osama M. K.1,2; Abd El Rahim, Said H.2 | |
通讯作者 | Kassem, Osama M. K. |
来源期刊 | GEOTECTONICS
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ISSN | 0016-8521 |
EISSN | 1556-1976 |
出版年 | 2014 |
卷号 | 48期号:6页码:483-495 |
英文摘要 | The Dungash gold mine area is situated in an EW-trending quartz vein along a shear zone in metavolcanic and metasedimentary host rocks in the Eastern Desert of Egypt. These rocks are associated with the major geologic structures, which are attributed to various deformational stages of the Neoproterozoic basement rocks. Field geology, finite strain and microstructural analyses were carried out and the relation-ships between the lithological contacts and major/minor structures have been studied. The R (f)/I center dot and Fry methods were applied on the metavolcano-sedimentary and metapyroclastic samples from 5 quartz veins samples, 7 metavolcanics samples, 3 metasedimentary samples and 4 metapyroclastic samples in Dungash area. Finite-strain data show that a low to moderate range of deformation of the metavolcano-sedimentary samples and axial ratios in the XZ section range from 1.70 to 4.80 for the R (f)/I center dot method and from 1.65 to 4.50 for the Fry method. We conclude that finite strain in the deformed rocks is of the same order of magnitude for all units of metavolcano-sedimentary rocks. Furthermore, the contact between principal rock units is sheared in the Dungash area under brittle to semi-ductile deformation conditions. In this case, the accumulated finite strain is associated with the deformation during thrusting to assemble nappe structure. It indicates that the sheared contacts have been formed during the accumulation of finite strain. |
英文关键词 | finite strain microstructural Dungash area Neoproterozoic rocks Eastern Desert of Egypt |
类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia ; Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000346025800005 |
WOS关键词 | WADI MUBARAK BELT ; FLUID INCLUSIONS ; NORTHERN THRUST ; ORE-DEPOSITS ; MINERALIZATION ; ROCKS ; ORIGIN ; EVOLUTION ; MINE ; CLASSIFICATION |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
来源机构 | King Saud University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182323 |
作者单位 | 1.King Saud Univ, Fac Sci, Dept Geol, SGSRC, Riyadh 11451, Saudi Arabia; 2.Natl Res Ctr, Dept Geol, Cairo 12622, Egypt |
推荐引用方式 GB/T 7714 | Kassem, Osama M. K.,Abd El Rahim, Said H.. Finite strain analysis of metavolcanics and metapyroclastics in gold-bearing shear zone of the Dungash area, Central Eastern Desert, Egypt[J]. King Saud University,2014,48(6):483-495. |
APA | Kassem, Osama M. K.,&Abd El Rahim, Said H..(2014).Finite strain analysis of metavolcanics and metapyroclastics in gold-bearing shear zone of the Dungash area, Central Eastern Desert, Egypt.GEOTECTONICS,48(6),483-495. |
MLA | Kassem, Osama M. K.,et al."Finite strain analysis of metavolcanics and metapyroclastics in gold-bearing shear zone of the Dungash area, Central Eastern Desert, Egypt".GEOTECTONICS 48.6(2014):483-495. |
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