Abstract

The Hamama deposit is represented by a steeply dipping massive sulfide orebody, located at the contact between basaltic lavas and their volcaniclastic varieties. It is about 3 km along strike, up to 110 m in thickness, and more than 250 m in depth. According to the documentation of cores from exploration boreholes, the vertical zoning of the ore zone was revealed, which consists of four zones (from bottom to top): 1, the primary ore zone; 2, secondary sulfide enrichment zone; 3, leaching zone; and 4, oxidation zone. The highest Au, Pb and Cu concentrations are distributed in the oxidation zone, while the highest Ag and Zn concentrations are observed in the massive primary ore at heights between 340 and 390 m. The oxidation zone is followed by a sharp metal depletion zone, then the metal content increases in the secondary enrichment zone and finally gradually decreases with thinning of the orebody. The interelement correlations between the base metals and Pb, Hg, Cd, As and Sb have been established, which reflect the polymetallic nature of the ore. Economic mineralization is grouped into two sectors: the Western and Eastern Hamama. The Western Hamama is more productive in terms of Au and Ag, while the Eastern Hamama hosts large amounts of Zn, Pb and Cu.

中文翻译：

---

埃及东部沙漠中部哈马马金矿垂直分带及地球化学异常场

摘要

Hamama 矿床以陡倾的块状硫化物矿体为代表，位于玄武质熔岩与其火山碎屑岩的接触处。沿走向约3 km，厚度达110 m，深度超过250 m。根据勘探钻孔岩心资料，揭示了矿带的垂直分带，由四个带（自下而上）组成：1，原生矿带；2、二次硫化物富集区；3、浸出区；4、氧化区。Au、Pb 和 Cu 浓度最高分布在氧化带，而 Ag 和 Zn 浓度最高出现在块状原生矿中，高度在 340 至 390 m 之间。氧化区之后是尖锐的金属耗尽区，然后金属含量在二次富集区增加，最后随着矿体变薄而逐渐减少。基本金属与 Pb、Hg、Cd、As 和 Sb 之间的元素间相关性已经建立，反映了矿石的多金属性质。经济矿化分为两个部分：西部和东部 Hamama。西滨的金和银产量更高，而东滨的含大量锌、铅和铜。