Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.lithos.2016.06.024 |
Geochemical signature variation of pre-, syn-, and post-shearing intrusives within the Najd Fault System of western Saudi Arabia | |
Hassan, M.1,2; Abu-Alam, T. S.1,3,4; Hauzenberger, C.1; Stuewe, K.1 | |
通讯作者 | Hassan, M. |
来源期刊 | LITHOS
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ISSN | 0024-4937 |
EISSN | 1872-6143 |
出版年 | 2016 |
卷号 | 263页码:274-291 |
英文摘要 | Late Precambrian intrusive rocks in the Arabian-Nubian Shield emplaced within and around the Najd Fault System of Saudi Arabia feature a great compositional diversity and a variety of degrees of deformation (i.e. pre-shearing deformed, sheared mylonitized, and post-shearing undeformed) that allows placing them into a relative time order. It is shown here that the degree of deformation is related to compositional variations where early, usually pre-shearing deformed rocks are of dioritic, tonalitic to granodioritic, and later, mainly post-shearing undeformed rocks are mostly of granitic composition. Correlation of the geochemical signature and time of emplacement is interpreted in terms of changes in the source region of the produced melts due to the change of the stress regime during the tectonic evolution of the Arabian-Nubian Shield. The magma of the pre-shearing rocks has tholeiitic and calc-alkaline affinity indicating island arc or continental arc affinity. In contrast, the syn-and post-shearing rocks are mainly potassium rich peraluminous granites which are typically associated with post-orogenic uplift and collapse. This variation in geochemical signature is interpreted to reflect the change of the tectonic regime from a compressional volcanic arc nature to extensional within-plate setting of the Arabian-Nubian Shield. Within the context of published geochronological data, this change is likely to have occurred around 605-580 Ma. (C) 2016 Elsevier B.V. All rights reserved. |
英文关键词 | Najd Arabian-Nubian shield Geochemistry Plate tectonic Compressional Extensional Shearing Intrusive rocks |
类型 | Article |
语种 | 英语 |
国家 | Austria ; Egypt ; Norway |
收录类别 | SCI-E |
WOS记录号 | WOS:000385325200016 |
WOS关键词 | CENTRAL EASTERN DESERT ; NUBIAN-SHIELD ; TECTONIC EVOLUTION ; CRUSTAL GROWTH ; U-PB ; NEOPROTEROZOIC GRANITOIDS ; ISOTOPIC CONSTRAINTS ; AFRICAN OROGEN ; KERAF SUTURE ; RING COMPLEX |
WOS类目 | Geochemistry & Geophysics ; Mineralogy |
WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/194982 |
作者单位 | 1.Karl Franzens Univ Graz, Inst Erdwissensch, Univ Pl 2, A-8010 Graz, Austria; 2.Suez Canal Univ, Fac Sci, Dept Geol, Ismailia, Egypt; 3.Tanta Univ, Fac Sci, Dept Geol, Tanta, Egypt; 4.Norwegian Polar Res Inst, Fram Ctr, N-9296 Tromso, Norway |
推荐引用方式 GB/T 7714 | Hassan, M.,Abu-Alam, T. S.,Hauzenberger, C.,et al. Geochemical signature variation of pre-, syn-, and post-shearing intrusives within the Najd Fault System of western Saudi Arabia[J],2016,263:274-291. |
APA | Hassan, M.,Abu-Alam, T. S.,Hauzenberger, C.,&Stuewe, K..(2016).Geochemical signature variation of pre-, syn-, and post-shearing intrusives within the Najd Fault System of western Saudi Arabia.LITHOS,263,274-291. |
MLA | Hassan, M.,et al."Geochemical signature variation of pre-, syn-, and post-shearing intrusives within the Najd Fault System of western Saudi Arabia".LITHOS 263(2016):274-291. |
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