山东界河金矿矿化类型、地质勘查模型及成矿预测  

Mineralization type,geological exploration model and prediction of Jiehe gold deposit in Shandong

作　　者：李绪俊[1] 刘文胜 罗振媛[1] 陈静[1] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]山东省招远市界河金矿,山东招远265401

出　　处：《世界地质》2008年第4期362-369,共8页World Geology

基　　金：国家自然科学基金(40572058)

摘　　要：按照矿石矿物组成、矿石组构、矿石类型以及围岩蚀变特点等,将山东招远界河金矿的金矿化类型分为钾化花岗岩型、黄铁绢英岩型、石英-多金属脉型和似青盘岩型等4种。钾化花岗岩型金矿化分布于"蚀变岩型金矿"成矿系统的深部,是富钾岩浆热液钾交代作用和黄铁矿脉充填作用的结果,一般形成于大矿体的下部或旁侧或作为大矿体的下部或根部的一部分。黄铁绢英岩型矿化位于成矿系统中部的主控矿断裂中的最佳成矿部位,是深部岩浆和浅部天水热液发生混合、交代和充填的最理想部位,往往构成大型和特大型工业矿体。脉状多金属型矿化位于该成矿系统的中浅部,地下水热液参与较多,成矿温度低,只能形成小而富的多金属硫化物型金矿体。在成矿系统的边部,热液活动更弱,形成以绿泥石化为主的似青盘岩化带,矿化较弱或构成无矿节理化带,本身不具工业意义,但可以指示深部成矿作用和隐伏矿体的存在。不同金矿化类型在界河金矿范围内有规律地分布是界河金矿深部和外围探矿的重要地质依据。Based on ore type, alteration characteristic and spatial distribution, four types of gold mineralization have been divided into potassium-altered granite type, beresitization type, quartz-base metallic sulphide vein type and propylitic-like type. Potassium-altered granite type, as small ore bodies around or beneath larger beresitization type, was formed deeply and could be the products of potassium-rich magmatic hydrothermal fluids and pyrite filling. Beresitization type, being main part of large and superlarge ore bodies and considered to be at the most desirable sites of mineralizaton, is thought to be the result of mixing, replacement and filling of the deep magmatie and shallow meteoric hydrothermal fluids. Quartz-base metallic sulphide vein type is resulted from the filling of meteoric hydrothermal fluids mainly and is related merely to some small, high grade ore bodies. Propylitization-like type was formed at the exterior of the mineralization system from ever weak low temperature hydrothermal fluids. Though no industrial ore bodies contained, it could be an indication for the presence of blind ore bodies at depth. The distribution of different gold mineralization types and their spatial relation can provide significant information for exploration at the deep part and its surrounding rocks in the Jiehe gold deposit.

关 键 词：界河金矿 矿化类型 勘查模型 成矿预测 

分 类 号：P612[天文地球—矿床学]