干旱区生态环境知识资源中心(Arid): Uranium mineralization in the muscovite-rich granites of the Shalatin region, Southeastern Desert, Egypt

Arid

	Uranium mineralization in the muscovite-rich granites of the Shalatin region, Southeastern Desert, Egypt
	Saleh, Gehad M.
通讯作者	Saleh, GM
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
出版年	2006
卷号	25 期号:1 页码:1-15
英文摘要	The younger granitoids of the Shalatin district in the Southeastern Desert of Egypt, are of biotite and two-mica granite compositions. The geochemistry of rare-earth elements (REE), yttrium, thorium and uranium forms the basis for many important methods to reconstruct igneous petrogenesis. Since the recognition that REE, Y, Th, U-rich accessories may play an important role in controlling the geochemistry of crustal melts, a considerable amount of work has been done in an attempt to understand their effects. However, this effort has been almost exclusively focused on three minerals: zircon, monazite and apatite. Nevertheless, the variety of REE-Th-U-rich accessories in granite rocks are neither limited to these three minerals nor are they always the main REE, Y, Th carriers. The geochemistry of REE, Y, Th and U reflects the behavior of accessories and some key major minerals such as garnet and feldspars, and may therefore give valuable information about the conditions of partial melting, melt segregation and crystallization of granite magmas in different crustal regimes. The geochemistry of U and Th during magmatic differentiation has been studied in many granites from different areas and it has been known that the U and Th contents of granitic rocks generally increase during differentiation, although in some cases they decrease. The Th/U ratio can either increase or decrease, depending on redox conditions, the volatile content or alteration by endogene or supergene solutions. The accessory assemblage of muscovite-rich granites and high-grade rocks is composed of monazite, xenotime, apatite, Th-orthosilicate, secondary U-mineralization and betafite-pyrochlore. REE, Y, Th and U are not suitable for geochemical modeling of granitoids by means of equilibrium-based trace element fractionation equations, but are still useful petrogenetic tools.
英文关键词	uranium mineralization rare-earth element muscovite-rich granite Shalatin region Southeastern Desert of Egypt
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000218213600001
WOS关键词	RARE-EARTH-ELEMENTS ; ACCESSORY MINERALS ; GEOCHEMISTRY ; DISSOLUTION ; EVOLUTION ; MONAZITE ; ZIRCON ; ROCKS ; PATTERNS ; HIMALAYA
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328773
作者单位	[Saleh, Gehad M.] Nucl Mat Author, POB 530 Maadi, Cairo, Egypt
推荐引用方式 GB/T 7714	Saleh, Gehad M.. Uranium mineralization in the muscovite-rich granites of the Shalatin region, Southeastern Desert, Egypt[J],2006,25(1):1-15.
APA	Saleh, Gehad M..(2006).Uranium mineralization in the muscovite-rich granites of the Shalatin region, Southeastern Desert, Egypt.ACTA GEOCHIMICA,25(1),1-15.
MLA	Saleh, Gehad M.."Uranium mineralization in the muscovite-rich granites of the Shalatin region, Southeastern Desert, Egypt".ACTA GEOCHIMICA 25.1(2006):1-15.

条目包含的文件
条目无相关文件。

个性服务

谷歌学术

百度学术

必应学术

相关权益政策

收藏/分享