秦岭—祁连造山带印支-燕山期构造与大型-超大型矿床的形成关系  

Relationship Between Indosinian-Yanshanian Tectonic Framework and Large-Superlarge Mineral Deposits in Qinling-Qilian Orogenic Belt

作　　者：杜玉良[1] 汤中立 蔡克勤[1] 李文渊[3] 张韬[1] 

机构地区：[1]中国地质大学,北京100083 [2]甘肃省地质矿产勘查开发局,甘肃兰州730000 [3]西安地质矿产研究所,陕西西安710054

出　　处：《矿床地质》2003年第1期65-71,共7页Mineral Deposits

摘　　要：印支_燕山期构造_岩浆热液活动 ,对秦岭—祁连造山带的区域成矿控制与影响作用十分显著。主要表现在该期北东向构造_岩浆活动不仅控制了金等矿产的形成 ,而且使先期形成的铜、铅锌等矿产发生了较强烈的改造和富集作用。该期北东向构造带与先期的北西、近东西向构造或含矿层交汇叠加部位 ,是形成大型_超大型矿床的重要条件。文章对秦岭—祁连造山带印支_燕山期构造_岩浆活动带的发育特征及其对大型_超大型矿床的控制与影响等进行了初步分析与探讨 ,提出了本区新一轮矿产勘查研究对策与思路。It is obvious that the Indosinian-Yanshanian tectono-magmatic activities controlled and affected the ore-forming process of the Qinling-Qilian orogenic belt. This finds expression in the fact that the Indosinian-Yanshanian NE-trending structures not only controlled the mineralization of gold and other metallic minerals but also caused the considerable reformation and enrichment of the earlier-formed copper, zinc, lead and other minerals. Where the NE-trending structures intersected or are superimposed on the earlier-formed NW- and nearly EW-trending structures or ore-bearing formations, the large and superlarge mineral deposits are likely to be formed. In this paper, the characteristics of the Indosinian-Yanshanian tectono-magmatic belt which controlled and affected the formation of large-superlarge mineral deposits are analyzed and discussed, and new measures and thinking are put forward for carrying out a new round of mineral exploration in this region.

关 键 词：地质学 秦岭-祁连造山带 印支-燕山期构造 大型-超大型矿床 富集作用 岩浆活动 

分 类 号：P611[天文地球—矿床学]