东秦岭南泥湖钼（钨）矿床和秋树湾铜（钼）矿床成岩成矿特征对比研究

东秦岭钼矿带内的南泥湖钼（钨）矿床和秋树湾铜（钼）矿床同为斑岩型矿床，地理位置相近，却在成矿类型和规模上差异显著。通过对两个矿床的矿床地质特征、成矿斑岩体的地球化学特征、成矿时代及其成矿物质来源（S同位素、流体包裹体和Re含量）进行对比分析，确定南泥湖钼（钨）矿床和秋树湾铜（钼）矿床类型均为壳幔混源型，后者成岩成矿过程有更多的幔源物质参与，并且两个矿床同时形成于秦岭造山带中生代燕山期伸展减薄的机制下，但所处构造单元（华北陆块南缘和北秦岭）不同，以上这些都导致了成矿的差异性，并为日后在东秦岭钼矿带中钼铜两类矿床的找矿工作提供参考。

Comparison of petrologic and metallogenic characteristics between the Nannihu Mo(-W) deposit and Qiushuwan Cu(Mo) deposit in East Qin Ling

The Nannihu Mo(-W) deposit and Qiushuwan Cu(-Mo) deposit are both porphyritic deposits in the East Qin Ling molybdenum belt, but they are distinct in metallogenic type and scale. This study compares their characteristics of deposit geology, geochemistry of ore-forming porphyries, metallogenic epoch and ore-forming material sources (S isotope, fluid inclusions and Re content). It is determined that they are derived from a mixed source of mantle and crust, and the Qiushuwan Cu(-Mo) deposit involves more mantle materials. The two deposits were formed by the same mechanism of extension and thinning during the Yanshanian epoch in the Qin Ling, but located in different tectonic units, the southern margin of North China block and the northern Qin Ling. These factors resulted in the metallogenic difference and provide a reference for the exploration of Mo and Cu deposits in the East Qin Ling molybdenum belt in the future.