Kimberlite discoveries in NW Liberia: Tropical exploration & preliminary results

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• 作者：Stephen E. Haggerty ^{haggerty@fiu.edu}
• 关键词：Kimberlite ; Liberia ; Dikes ; Pipe ; Tectonic-control ; Diamonds
• 刊名：Journal of Geochemical Exploration
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：173
• 期：Complete
• 页码：99-109
• 全文大小：4699 K
• 卷排序：173

文摘

Kimberlite pipes exist on deeply eroded shields in association with root-zones of en echelon dike complexes. Dike trends are controlled by reactivated paleo-sutures from Mesozoic oceanic transform faults to Precambrian flexures. Ilmenite only has survived as a potential kimberlitic indicator mineral under extreme tropical weathering. Pandanus candelabrum is a new geo-botanical indicator of kimberlite pipes in Liberia. Micro-diamonds confirm that the redox state of ilmenite is a useful proxy for the preservation of macro-diamonds.