Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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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). |
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