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DOI10.1016/j.oregeorev.2019.103109
Bedrock topography modeling and calcrete-uranium prospectivity analysis of Central Erongo Region, Namibia
Chudasama, Bijal1,2; Porwal, Alok1,3; Wilde, Andy4; Gonzalez-Alvarez, Ignacio3,5; Aranha, Malcolm1; Akarapu, Umamahesh1; Hirsch, Martin6; Becker, Eduard4
通讯作者Chudasama, Bijal
来源期刊ORE GEOLOGY REVIEWS
ISSN0169-1368
EISSN1872-7360
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).
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