Helicopter AFMAG (ZTEM) Survey Results over the Ad Duwayhi intrusion related gold deposit (IRGD) in the Western Arabian Shield, KSA

Jean M. Legault; Carlos Izarra; Shengkai Zhao; Emad M. Saadawi

doi:10.1071/ASEG2013ab182

ISSN: 2202-0586
E-ISSN:

oa Helicopter AFMAG (ZTEM) Survey Results over the Ad Duwayhi intrusion related gold deposit (IRGD) in the Western Arabian Shield, KSA
Authors Jean M. Legault^a, Carlos Izarra^b, Shengkai Zhao^c and Emad M. Saadawi^d
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^a Geotech Ltd., Aurora, , Can, [email protected] ^b Geotech Ltd., Aurora, , Can, [email protected] ^c Geotech Ltd., Aurora, , Can, [email protected] ^d Ma’aden (Saudi Arabian Mining Company), Jeddah, , KSA, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2013, Issue ASEG2013 - 23rd Geophysical Conference, Dec 2013, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2013ab182
- Published online: 01 Dec 2013

Abstract

ZTEM helicopter AFMAG electromagnetic and aeromagnetic surveys over the Ad Duwayhi IRGD gold deposit were designed to characterize the deposit signatures. Field data and 2D EM inversion results indicate the Ad Duwayhi intrusive centre features low magnetic susceptibilities and high resistivities that are consistent with the iron-depleted, quartz-sericite- carbonate alteration. Closer inspection of the ZTEM resistivity image suggests that the mineralized breccia zones represent weak resistivity lows within the larger resistive intrusion. The Ad Duwayhi gold porphyry lacks a visible low resistivity alteration halo that distinguishes IRGD’s from porphyry copper deposits. The combined aeromagnetic low and ZTEM resistivity high signatures might allow discrimination of other buried IRGD gold deposits regionally.

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2026-01-16

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References

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Article Type: Research Article

Keyword(s): aeromagnetic; AFMAG; Electromagnetic; gold; intrusive; IRGD; ZTEM

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oa Helicopter AFMAG (ZTEM) Survey Results over the Ad Duwayhi intrusion related gold deposit (IRGD) in the Western Arabian Shield, KSA

Abstract

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