钦杭成矿带皖浙赣相邻区成矿地质背景对比

Comparative Studies on the Ore-forming Geological Background in the Anhui-Zhejiang-Jiangxi Border Region of Qinhang Metallogenic Belt

在总结前人研究成果的基础上,对比研究了钦杭成矿带安徽部分(皖南地区)、江西部分(赣东北地区)和浙江部分(浙西地区)的矿源层、岩浆岩、地质构造。赣东北地区燕山期与斑岩有关的多金属矿床发育的根本原因是幔源岩浆直接参与成矿作用,赣东北地区与斑岩体有关矿床发育的关键原因在于斑岩体形成的构造环境既有拉张,又有挤压,另外赣东北地区深大断裂发育,从而有利于深源岩浆参与成矿作用,且矿源层多,并具多阶段成矿作用。皖南的逍遥岩体是皖南寻找W、Mo、Cu、Ag等矿床的有利地段,休宁天井山金矿成矿前景乐观。

Based on the summary of the previous results,the paper studies the source beds, magmatic rocks and geo- logical structure in Zhejiang （ western Zhejiang） -Anhui （ southern Anhui） -Jiangxi （ northeastern Jiangxi） border region of Qinhang metallogenic belt. The mantle magma directly participated in mineralization is the fundamental factor for the devel- opment of the polymetallic deposits related to porphyry in Yanshanian at the northeastern Jiangxi, and the structural environ- ment with both tension and compression is the key factor. Furthermore, more discordogenic faults in the northeastern Jiangxi are developed,which benefits the mineralization participated by deep magma. The northeastern Jiangxi also has more source bed, and has experienced multistage mineralization. The Xiaoyao rock is the favorable place for prospecting deposits of W, Mo, Cu and Au, and Tianjingshan Gold Deposit in Xiuning has an optimistic mineralization prospect.