Comparison of ground TEM and VTEM responses over kimberlites in the Kalahari of BotswanaFN1

Ed Cunion

doi:10.1071/EG09019

ISSN: 0812-3985
E-ISSN: 1834-7533

Comparison of ground TEM and VTEM responses over kimberlites in the Kalahari of BotswanaFN1
Authors Ed Cunion^a
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^a 63 Woodlawn Avenue, Auburn, Maine, ME 04210, USA. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 40, Issue 4, Dec 2009, p. 308 - 319
DOI: https://doi.org/10.1071/EG09019
- Received: 08 Apr 2009
- Accepted: 29 Oct 2009
- Published online: 01 Dec 2009

Abstract

Kalahari cover greater than 60 m thick precludes indicator sampling from identifying individual kimberlite intrusions in the Kokong kimberlite field of Botswana. Employing concurrent multidisciplinary geophysical surveying methods is the exploration technique for the discovery of kimberlites. Time Domain Electromagnetic (TEM) surveying is an effective technique for the prioritization of aeromagnetic and gravity signatures. Diagnostic discrete conductive TEM signatures are usually returned from kimberlites overlain by up to 120 m of Kalahari cover. Following the success of kimberlite identification by ground TEM, a VTEM helicopter time domain survey was flown over the Kokong field to increase the TEM coverage in this prospective kimberlite terrain. A comparison of responses over covered kimberlites traversed by both TEM survey methods and their comparative effectiveness for kimberlite identification is presented.

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Comparison of ground TEM and VTEM responses over kimberlites in the Kalahari of BotswanaFN1

Exploration Geophysics 40, 308 (2009); https://doi.org/10.1071/EG09019

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Article Type: Research Article

Keyword(s): Kalahari; kimberlite; magnetic; petrophysics; survey; TEM; VTEM

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Comparison of ground TEM and VTEM responses over kimberlites in the Kalahari of BotswanaFN1

Abstract

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