Arid
DOI10.1016/j.oregeorev.2015.08.018
The development of regolith exploration geochemistry in the tropics and sub-tropics
Butt, C. R. M.
通讯作者Butt, C. R. M.
来源期刊ORE GEOLOGY REVIEWS
ISSN0169-1368
EISSN1872-7360
出版年2016
卷号73页码:380-393
英文摘要

This essay traces the development of geochemical exploration from its early beginnings in the modern era during the 1930s, concentrating especially in its application to deeply weathered terrain in the tropics and sub-tropics. Following promising results obtained in temperate regions in North America and Europe, test orientation surveys were conducted to see whether similar procedures were applicable in the tropics, where conventional geological prospecting was largely precluded due to the extensive cover of a deep lateritic regolith and consequent lack of outcrop. After initial work in Sierra Leone and Nigeria, the emphasis transferred to East Africa in the 1950s and 1960s, aimed principally at Cu exploration. Many of the basic principles for exploration in dominantly residual, free-draining terrain were quickly established in this period. Exploration in terrains with more complex weathering histories, however, raised a number of difficulties due to leaching and secondary concentrations of elements, problems in selecting and identifying appropriate sample media, and extensive transported overburden. These were encountered especially in more arid regions in Australia and Africa during exploration for Ni and Au during the 1970s and 1980s. This led to a change in approach, placing weathering and geochemical dispersion in the context of regolith and landscape evolution -a return to the early concept of landscape geochemistry. The 3D expression of mineralization in the landscape is depicted as empirical conceptual models, that account for both relict features and active processes, and portray element associations, dispersion mechanisms and host materials. They also indicate suitable sample media, sampling intervals and procedures for analysis and interpretation. Crown Copyright (C) 2015 Published by Elsevier B.V. All rights reserved.


英文关键词Landscape geochemistry Lateritic terrain Weathering Sampling Analysis
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000366788100002
WOS关键词SCIENCE-AND-TECHNOLOGY ; WESTERN-AUSTRALIA ; MINERAL EXPLORATION ; IMPERIAL COLLEGE ; YILGARN CRATON ; CONCEPTUAL MODELS ; TRANSPORTED OVERBURDEN ; LATERITE GEOCHEMISTRY ; URANIUM DEPOSITS ; GOLD EXPLORATION
WOS类目Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/195265
作者单位CSIRO Mineral Resources, Bentley, WA 6102, Australia
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GB/T 7714
Butt, C. R. M.. The development of regolith exploration geochemistry in the tropics and sub-tropics[J]. Commonwealth Scientific and Industrial Research Organisation,2016,73:380-393.
APA Butt, C. R. M..(2016).The development of regolith exploration geochemistry in the tropics and sub-tropics.ORE GEOLOGY REVIEWS,73,380-393.
MLA Butt, C. R. M.."The development of regolith exploration geochemistry in the tropics and sub-tropics".ORE GEOLOGY REVIEWS 73(2016):380-393.
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