小秦岭--熊耳山金成矿作用与区域构造的耦合

小秦岭-熊耳山地区是重要的金、多金属成矿带，金属元素高度富集，在长不足200km的矿带内，集中产出100多个大中小型金矿床(点)和10余个特大、中、小型钼矿床；成矿金属元素组合既有单一金矿床、铝矿床，也有铝-金-多金属矿床。金的矿床类型有石英脉型、构造蚀变岩型及斑岩．爆破角砾岩型和砂金矿床等。金的成矿流体为临界-超临界地幔流体，成矿物质具深源性。成矿时代主要为中生代，印支期是成矿的开始与先导，燕山期叠加其上，构成一个完整的中生代成矿旋回。金成矿作用受秦岭造山带印支期构造作用的制约，在前沿挤压，后缘滞后拉张的构造耦合作用动力学背景下产出。成矿与岩石圈拆沉作用及地幔流体上涌有关。

Minerogenesis of gold and its coupling with tectonics in Xiaoqinling--Xiong'ershan region

Xiaoqinling to Xiong'ershan area is an important mineralization belt of gold and polymetal where metallic elements are so concentrated that more than 100 gold deposits and occurrences and 10-plus molybdenum deposits (spots) in different sizes formed in less than 200 km mineral belt. Metallogenetic element assemblage is not only single Au and Mo deposits but also Au-Mo-polymetal deposits. The type of Au deposit includes quartz-vein, constructaral altered rock, porphyry-explosion breccia and placer deposit and so on. Au mineralization fluid which characterizes abyssal property is critical-supercritical mantle fluid, and mineralization is mainly in Mesozoic era. The initial mineralization is in Indo-Chinese epoch, superimposed by mineralization in Yanshanian, forming an entire mineralization cycle in Mesozoic. Controlled by tecto-orogenic processes in Indo-Chinese epoch in Qinling orogenic belt, Au minerogenesis formed in the coupling dynamic background of compression in the foreland and retard extension in rear marginal areas. Mineralization is related to lithosphere delamination and mantle upwelling.