Hamdah ancient gold mines, Kingdom of Saudi Arabia
<p>The Hamdah prospect is a 1.5-km<sup>2</sup> area that includes ancient mine workings 15 km southeast of Hamdah in the southern Arabian Shield. The…
Public-domain full text preserved in the Mountain Man Mining Library. Original source: pubs.usgs.gov.
Hamdah ancient gold mines, Kingdom of Saudi Arabia Author: Bosch, Paul S., Jannadi, Eyad, Helaby, A. M., Johnson, P.R. Year: 1990 Category: Report <p>The Hamdah prospect is a 1.5-km<sup>2</sup> area that includes ancient mine workings 15 km southeast of Hamdah in the southern Arabian Shield. The workings cluster at a gently dipping thrust contact between serpentinite (above) and hornblende schist (below) exposed in a window within the serpentinite. Aplite sills intrude the contact, and gold concentrations occur just above or below it.</p> <p>The ancient mine dumps cover >100,000 m<sup>2</sup> of the prospect and are estimated to be 1.5 to 1.8 m thick. They contain nearly 181,000 metric tons of material at an average grade of 4.5 g/t g Tags: usgs, diamond drilling prospecting Source: ://pubs.usgs.gov/of/1990/0326/plate-6.pdf