阿尔及利亚Guettara锰矿地质特征及成矿模式探讨

Study on Geological Characteristics and Metallogenic Model of Guettara Manganese Deposits in Algeria

摘要:

阿尔及利亚Guettara锰矿床位于非洲西北部3个古板块(ATLAS、ANTIATLAS、SARLA)碰撞缝合线三结点附近的断陷盆地中，区域构造线总体方向300°。经过地质勘查发现10条锰矿体，赋存于新元古界火山沉积地层中。矿体严格受层位控制，呈单斜大致平行展布，呈似层状、层状、透镜状产出，局部出露地表。矿体呈NW—SE向展布，走向最大延长达475.00 m；锰平均品位33.00%，为中型富锰矿床，矿石质量优良，易开采。本文依据Guettara锰矿矿床的地质特征，分析了控矿因素及成矿模式，认为矿床成因类型为海相沉积变质锰矿床，对寻找同类型矿床有一定的借鉴意义。

Abstract:

The tectonic location of Guettara manganese deposit in Algeria is located in a faulted basin near threenode of the collision suture lines of three ancient plates (ATLAS, ANTI ATLAS, SARLA) in northwest Africa. The overall direction is 300 ° along regional tectonic line. After geological exploration, 10 manganese ore bodies have been discovered. They all occur in Neoproterozoic volcanic sedimentary strata. The ore body is strictly controlled by stratigraphic position, and is roughly distributed in a monoclinic and parallel manner. It occurs in a layered-like, layered and lens like manner, and locally exposed on the surface. The ore body is distributed with the trend of NW—SE with a maximum extension of 475.00 m. The average grade of manganese deposit is 33.00%. It is a mediumsized manganese rich deposit with excellent ore quality and easy mining. Based on geological characteristics of Guettara manganese deposit, combining with comprehensive study and analysis of ore controlling factors, mineralization models and other factors, it is believed that the origin of the deposit is a marine sedimentary metamorphic manganese deposit. The discovery of this deposit has certain reference significance for searching for similar deposits.