非洲锰矿床成因类型、地质特征及表生富集作用

赵宏军; 张伟波; 陈秀法; 何学洲; 张潮; 陈超; 于永善; 郑喻林

doi:10.12029/gc20220106

非洲锰矿床成因类型、地质特征及表生富集作用

Genetic types, geological characteristics and genetic mechanism of manganese deposits in Africa

摘要

摘要:
研究目的 非洲锰矿资源丰富，储量3.1亿t、资源量6.6亿t排名在世界上均列第一，加强非洲锰矿床的研究和认识对推动锰矿找矿工作具有重要的指导意义。
研究方法 通过对重要成矿带典型矿床的解剖总结了非洲锰矿床的成因类型、地质特征。
研究结果 非洲锰矿成因类型主要有前寒武系条带状铁建造（BIF）型、海相沉积型、陆相（三角洲湖相）沉积型、与岩浆作用有关的热液型锰矿床等，其中以前寒武系条带状铁建造（BIF）型和海相沉积型最为重要。
结论非洲锰矿资源具有矿床规模大（以大型、超大型为主）、品位高（30%~50%）、分布相对集中的总体特征；锰矿床的成锰时代较早，以前寒武纪为主；多数锰矿床都遭受2.0 Ga的不整合侵蚀及新生代表生氧化两期风化淋滤作用改造。

Abstract:
This paper is the result of mineral exploration engineering.
Objective Manganese ore resources abundant in Africa, where the 310 Mt reserves and 660 Mt resources rank first in the world.Enhance research and awareness of manganese deposits in Africa, It has important guiding significance for promoting the prospecting of manganese ore in my country.
Methods Through the dissection of typical deposits in important metallogenic belts, the genetic types and geological characteristics of manganese deposits in Africa are summarized.
Results Manganese ore types in Africa are diverse, such precambrian banded iron formation (BIF) type, marine sedimentary type, continental (delta-lacustrine) sedimentary type, magmatic hydrothermal type etc., Among them, the precambrian banded iron formation (BIF) type and marine sedimentary type are the most important.
Conclusions Manganese deposits are characterized by large deposits (mainly large and super large), high grade (30%-50%), and relatively concentrated distribution. The manganese-forming age of manganese deposits is earlier, mainly in the Precambrian; Most manganese deposits suffer eluviation weathering supergene processes from 2.0 Ga unconformity erosionand Cenozoic.

HTML全文

参考文献(72)

施引文献

资源附件(0)