莫桑比克太特省安格尼亚区石墨矿地质特征及找矿标志

Geological Characteristics and Prospecting Criteria of Graphite Deposit in the Angónia District,Tete Province of Mozambique

莫桑比克安格尼亚石墨矿为赋存于中元古代安格尼亚群含石墨变质岩系地层中的区域变质型矿床,严格受地层层位控制。含矿岩性为石墨黑云角闪斜长(二长)片麻岩、石墨斜长(二长)片麻岩、含石榴子石黑云角闪石墨黑云角闪斜长片麻岩。该区石墨矿变质岩相达到片麻岩相—麻粒岩相。该矿属于大鳞片晶质石墨矿,具有总体呈带状分布、单个矿体由多个矿层组成、中部厚两侧薄、矿体产状由地表向深部变陡等特征。经过选矿试验报告得出该石墨矿可选性好,极具开发利用价值。

The graphite mine of Angónia district of Mozambique is regional metamorphic deposit which occurred in the Angónia group of middle proterozoic,strictly controlled by the formation. Ore-bearing lithology is graphite dark clouds angle flash long（ two long） gneiss、graphite oblique length（ two long） gneiss、containing garnet black clouds amphibole graphite black cloud angle flash plagioclase gneiss. Metamorphic facies are gneiss and granulite facies. The ore belongs to the large-scale crystalline graphite ore,with a feature of that overall is distribution of belt-like,a single ore body composed of multiple layers and the ore is thick in the middle and thin on both sides,the deep output status of the ore body is steeper than the surface. The report of beneficiation test concludes that the graphite ore has good selectivity and the value of development utilization.