俄罗斯外贝加尔边疆区图拉达金矿地质特征研究

图拉达金矿位于俄罗斯外贝加尔边疆区内的达拉松矿田西北角,矿区内矿体受控于 NE 和 NNE 向断 裂,主要赋存于 NNE 向的破碎角砾岩中,矿石类型主要为含金碎裂角砾岩型。 矿体形态多呈脉状、透镜状,产状较稳 定,后期构造对矿体影响较小;矿体内部结构复杂,局部有明显的膨胀收缩、分支或分支复合、波状弯曲现象。 矿体围 岩蚀变为热液蚀变,主要类型有绿泥石化、绿帘石化、碳酸盐化、绢英岩化和硅化等。 主岩体与主岩体外围的断裂构造 内蚀变以及 NE 向断裂与近 SN 向断裂的交切部位是寻找碎裂角砾岩型金矿床的重要标志。 通过研究图拉达金矿以 及所在矿田的地质特征和找矿标志,对于国内地质工作者进一步了解中俄蒙跨境区域成矿规律和在矿区内发现更多 金矿体具有重要的借鉴和指导意义。

Study on Geological Characteristics of Tulada Gold Deposit in Outer Baikal Frontier Area of Russia

Tulada Gold Deposit is located in the northwest of the Darason Orefield in the outer Baikal Frontier Area of Russia. Orebodies in Tudala mining area are controlled by NE and NNE-trending faults and mainly occur in NNE-trending fragmentized breccia,and ore types are mainly gold-bearing shattered breccia. The shapes of orebodies are mostly vein type and lenticular type,the occurrence is stable and the later structure has little influence on the orebodies. The internal structure of the orebodies is complex,and there are obvious phenomena of expansion and contraction,branch or branch recombination,and wavy sinuation in local areas. The wall rock alteration of orebodies is hydrothermal alteration,mainly including chloritization,epidotization,carbonatization,sericitization and silicification. The alteration of fault structure belt in main rock mass and its periphery,and the intersection position of NE-trending fault and nearly SN-trending fault are important marks for searching for fragmentized breccia type gold deposits. Studying the geological characteristics and prospecting marks of Tulada Gold Deposit and its orefield has important reference and guiding significance for domestic geological workers to further understand the ore-forming regularity of gold deposits in the cross border area of China,Russia and Mongolia and to find more gold orebodies in the mining area.