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Evaluation of the Umm Al Khabath copper prospect, Jabal Ibrahim quadrangle, sheet 20/41C, Kingdom of Saudi Arabia

Open-File Report 78-521
By: , , and 
https://doi.org/10.3133/ofr78521

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Abstract

The Umm Al Khabath copper prospect (lat 20°10'N.; long 41°23'E.) was tested by 815 m of diamond drilling in three holes. Meager metallization of copper, zinc, gold, and silver is related to a distinct phase of quartz-pyrite veinlet stockworks and associated silicification, sericitization, and pyritization. Alteration and metallization are within a major north-trending shear zone, 10-50 m wide. Lithologies cut by the shear zone are pyroclastic agglomerate and tuff with intercalated ferruginous chert, wacke, and basalt flows, all belonging to the Precambrian Baish Group. The outcrop of the shear zone for a length of 1400 m contains scattered gossan, local zones of abundant malachite and chrysocolla veinlets, patches of malachite-rich calcrete cap, and several shallow ancient workings. Composite chip samples taken from the surface across the sheared and altered zone contain anomalous concentrations of copper and zinc in amounts greater than can be expected from the weathering of the slightly metallized rock of the sheared and altered zone.

Suggested Citation

Worl, R., Flanigan, V.J., 1976, Evaluation of the Umm Al Khabath copper prospect, Jabal Ibrahim Quadrangle, sheet 20/41C, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 78-521, ii, 41 leaves :ill., map ;28 cm.; (45 p. - PGS), https://doi.org/10.3133/ofr78521.

ISSN: 2331-1258 (online)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Evaluation of the Umm Al Khabath copper prospect, Jabal Ibrahim quadrangle, sheet 20/41C, Kingdom of Saudi Arabia
Series title Open-File Report
Series number 78-521
DOI 10.3133/ofr78521
Year Published 1976
Language English
Publisher U.S. Geological Survey
Description ii, 42 p.
Public Comments Saudi Arabian Project Report 213
Country Saudi Arabia
Other Geospatial Jabal Ibrahim quadrangle
Additional publication details