青海省那尔扎金矿床地质特征及控矿因素
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摘要
那尔扎金矿床位于东昆仑成矿带东段,矿区内已发现5条金矿化带,共圈定9条金矿体。通过分析成矿地质背景、矿区及矿床地质特征,进而探讨了控矿因素。分析表明:矿体主要赋存在上二叠统格曲组中,围岩蚀变主要有绢云母化、硅化、黄铁矿化、碳酸盐化、褐铁矿化、高岭土化、绿泥石化,其中硅化、黄铁矿化、褐铁矿化与成矿关系密切;断裂构造是主要控矿因素,矿化带和矿体主要受北西西向断裂构造控制。
Naerzha Gold Deposit is located at the east part of East Kunlun metallogenic belt. In the gold district,5 gold mineralization belts are discovered and 9 gold ore bodies are delineated. By analyzing ore-forming geologic settings,deposit and district geologic characteristics,ore-controlling factors are discussed. The analysis shows that the ore bodies mainly occur in Upper Permian Gequ Formation; surrounding rock alteration mainly includes sericitization,silicification,pyritization,carbonatization,limonitization,kaolinization and chloritization; and among them,silicification,pyritization and limonitization are closely related to mineralization; fault is the main ore-controlling factor; metallogenic belts and ore bodies are mainly controlled by NWW fault structure.
Naerzha Gold Deposit is located at the east part of East Kunlun metallogenic belt. In the gold district,5 gold mineralization belts are discovered and 9 gold ore bodies are delineated. By analyzing ore-forming geologic settings,deposit and district geologic characteristics,ore-controlling factors are discussed. The analysis shows that the ore bodies mainly occur in Upper Permian Gequ Formation; surrounding rock alteration mainly includes sericitization,silicification,pyritization,carbonatization,limonitization,kaolinization and chloritization; and among them,silicification,pyritization and limonitization are closely related to mineralization; fault is the main ore-controlling factor; metallogenic belts and ore bodies are mainly controlled by NWW fault structure.
引文
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