干旱区生态环境知识资源中心(Arid): Bedrock topography modeling and calcrete-uranium prospectivity analysis of Central Erongo Region, Namibia

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DOI	10.1016/j.oregeorev.2019.103109
	Bedrock topography modeling and calcrete-uranium prospectivity analysis of Central Erongo Region, Namibia
	Chudasama, Bijal 1,2; Porwal, Alok 1,3; Wilde, Andy 4; Gonzalez-Alvarez, Ignacio 3,5; Aranha, Malcolm 1; Akarapu, Umamahesh 1; Hirsch, Martin 6; Becker, Eduard 4
通讯作者	Chudasama, Bijal
来源期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
EISSN	1872-7360
出版年	2019
卷号	114
英文摘要	The Tertiary palaeodrainage system in the Namibian calcrete-uranium province is deeply buried under Cenozoic sediments (such as fluvial, alluvial and desert flash-flood terrace sediments, duricrusts and/or aeolian and fluvially reworked aeolian sands) and has no obvious surface expression, because of which, this province remains under-explored in spite of hosting the world's largest calcrete-uranium deposit at Langer Heinrich. This paper presents first-pass bedrock geology and bedrock topography models for the Namibian calcrete-uranium province generated using air-borne magnetic data, which are further used to delineate subsurface Tertiary palaeochannels in the province. Conjunctive interpretations of surface geology, bedrock geology, and bedrock topography indicated that the major underlying controls on the spatial distribution and configuration of the Tertiary palaeochannels in the Namibian province are both lithological and structural; however, the basement structural fabric that formed during the Damaran orogeny possibly exerts a fundamental control on both palaeodrainage as well as present drainage. The analysis also indicated that the carnotite deposition in the Langer Heinrich palaeochannel is possibly a consequence of westward reorientation of the course of the proto-Swakop river. Finally, the paper presents a manual prospectivity analysis of the province for calcrete-uranium deposits, which resulted in the demarcation of five prospective sections of palaeochannels in the Tumas Basin, Swakop River and Khan River terraces and in the Gawib Flats (west of the Langer Heinrich Deposit).
英文关键词	Subsurface palaeochannel mapping Aero-magnetic data Calcrete-hosted surficial uranium system Namib Desert palaeodrainage network Damaran orogeny Manual prospectivity analysis
类型	Article
语种	英语
国家	India ; Finland ; Australia ; Namibia
收录类别	SCI-E
WOS记录号	WOS:000498306900023
WOS关键词	2-DIMENSIONAL MAGNETIC BODIES ; CENTRAL ZONE ; WESTERN-AUSTRALIA ; ANALYTIC SIGNAL ; DAMARA-OROGEN ; DEPOSITS ; DEPTH ; BELT ; ENVIRONMENTS ; DEFORMATION
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
EI主题词	2019-11-01
来源机构	Commonwealth Scientific and Industrial Research Organisation ; University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310666
作者单位	1.Indian Inst Technol, CSRE, Mumbai, Maharashtra, India; 2.Geol Survey Finland, Espoo, Finland; 3.Univ Western Australia, CET, Crawley, Australia; 4.Deep Yellow Ltd, Subiaco, WA, Australia; 5.CSIRO, Discovery Program, Kensington, WA, Australia; 6.Reptile Mineral Resources & Explorat Pty Ltd, Swakopmund, Namibia
推荐引用方式 GB/T 7714	Chudasama, Bijal,Porwal, Alok,Wilde, Andy,et al. Bedrock topography modeling and calcrete-uranium prospectivity analysis of Central Erongo Region, Namibia[J]. Commonwealth Scientific and Industrial Research Organisation, University of Western Australia,2019,114.
APA	Chudasama, Bijal.,Porwal, Alok.,Wilde, Andy.,Gonzalez-Alvarez, Ignacio.,Aranha, Malcolm.,...&Becker, Eduard.(2019).Bedrock topography modeling and calcrete-uranium prospectivity analysis of Central Erongo Region, Namibia.ORE GEOLOGY REVIEWS,114.
MLA	Chudasama, Bijal,et al."Bedrock topography modeling and calcrete-uranium prospectivity analysis of Central Erongo Region, Namibia".ORE GEOLOGY REVIEWS 114(2019).