Geological characteristics and comprehensive ore-prospecting information of Shapinggou porphyry-type molybdenum deposit in Anhui Province
Geological characteristics and comprehensive ore-prospecting information of Shapinggou porphyry-type molybdenum deposit in Anhui Province
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作者：
Zhang Huai
沙坪沟斑岩型钼矿床位于安徽金寨，是大别造山带东部的超大型钼矿床。在最新勘查成果的基础上，对该矿床的成矿条件和地质特征进行了研究。断裂构造具有控矿和容矿双重作用，成矿物质来源于隐伏的花岗斑岩体，控制了形态。矿体的产状和大小。含矿侵入体具有SiO2和碱富集、Al2O3较高、K2O高于Na2O的特征。岩体与围岩接触带发生了广泛的硅化、钾长石化、黄铁矿化、绢云母化、丝绒化、钙化等成矿蚀变。提出了该类矿床的综合找矿信息和找矿思路。
Located geographically in Jinzhai of Anhui Province,the Shapinggou porphyry-type molybdenum deposit is a superlarge molybdenum deposit in eastern Dabie orogen.The authors studied the metallogenic conditions and geological characteristics of this ore deposit on the basis of the latest exploration results.The faulted structures played both ore-controlling and ore-hosting roles,and the metallogenic material originated from the concealed granite-porphyry bodies,which controlled the shapes.attitudes and sizes of the ore bodies.The ore-bearing intrusions are characterized by enrichment of SiO2 and alkali,relatively high Al2O3 and higher K2O than Na2O.There are extensive metallogenic alterations in the contact zone between the intrusion and the wall rock,such as silicifiation,K-feldspathization,pyritization,sericitization,choritization and calcitization.The comprehensive ore-prospecting information and idea for such ore deposits are put forward in the paper.