湖南廖家坪金矿成矿规律及找矿预测

Metallogenic Regularity and Prospecting Prediction of Liaojiaping Gold Deposit in Hunan Province

廖家坪金矿位于城步-桃江锑金多金属成矿带上。文章通过研究矿区地质特征、矿床地质特征、成矿规律分析等,进行找矿预测。区出露地层为震旦系、寒武系、奥陶系、志留系、泥盆系,其中奥陶系、志留系为金的主要赋矿地层。矿区西侧以NW向控矿和容矿构造为主,东侧以NE向控矿和容矿构造为主。矿区早期花岗岩与金矿形成密切相关。分析认为:城步-桃江深大断裂及其旁侧,印支早期花岗斑岩脉外接触带,构造变化及交汇部位,砂-泥质沉积岩建造及其NW向构造断裂带处,硅化、黄铁矿化、退色化的叠加部位及已发现金矿带的外围均为较好的找矿区域。

The Liaojiaping gold deposit is located in the Chengbu-Taojiang antimony gold polymetallic metallogenic belt.By studying the geological characteristics of the mining area,the geological characteristics of the deposit and the analysis of the metallogenic law,the prospecting prediction is made.The outcropping strata in this area are Sinian,Cambrian,Ordovician,Silurian and Devonian,among which the Ordovician and Silurian are the main ore-bearing strata of gold.The west side of the mine is dominated by NW oriented ore-controlling and ore-bearing structure,while the east side is dominated by NE oriented ore-controlling and ore-bearing structure.Early granite is closely related to the formation of gold deposits.The analysis shows that:Chengbu-Taojiang deep fault and its side;Outer contact zone of early Indochinese granite porphyry;structural change and intersection position;sand-argillaceous sedimentary rock formation and its NW tectonic fracture zone;the superposition of silicification,pyritization and decolorization and the periphery of the discovered gold belt are good prospecting areas.