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一、区域地质简介矿区位于阿尔金山东段南缘的多罗尔什弧形构造内。按大地构造位置,多罗尔什弧形构造隶属于青藏滇歹字形构造体系头部。 1.地层:区域出露地层主要为震旦亚界中一深变质的结晶片岩,普遍遭受混合岩化作用。按岩性对比可分为:下部角闪质混合岩组(相当于长城系);中部石榴黑云石英片岩组(相当于蓟县系);上部大理岩及绿色片岩组(相当于青白口系)。其次在化石沟一带零星分布有上泥盆统砂砾岩和中下石炭统生物厌岩(图1) 2.构造:本区经受长期、多次的构造变动,构造比较复杂。构造线方向大体以八一二
First, the regional geological profile Mining is located in the southern edge of the Altun Mountains Duoluoleshi arc structure. According to the geotectonic position, Dorogs arc structure belongs to the head of Qinghai-Tibet dynasty yin-zi structure system. 1. Stratigraphy: The regional outcrop formation is mainly a deep metamorphic crystalline schist from the Sinian sub-region, and is generally subjected to mixed-rock formation. According to the lithology comparison, it can be divided into the lower hornblende mixed rock group (equivalent to the Great Wall series), the central pomegranate black quartz quartz schist group (equivalent to the Jixian series), the upper marble group and the green schist group (equivalent to the Qingbaikou system) . Followed by sporadic distribution of Upper Devonian glutenite and Middle-Lower Carboniferous biotites in the fossil gullies (Fig. 1). 2. Structure: This area has experienced long-term and multiple structural changes with complex structures. The direction of the tectonic line is generally 8.12