五台——恒山地区地壳中金的活化史和成矿作用

五台－－恒山地区是Ａｕ的低背景区，但五台群变火山岩在成岩、变质和风化一再沉积过程中曾发生过３次活化再分配，其中由区域变质导致地Ａｕ矿化形成了工业矿床。该区与中生代过渡同熔型花岗岩类有关的金矿床与区域变质热液金矿具有明显的地质－－地球化学差异，显示出金矿化的规模和强度与花岗岩体的Ａｕ丰度呈正消长关系，该类矿庆中的Ａｕ来源于被重熔或被同熔的下地壳－－上地幔分布不均匀的Ａｕ及重金属硫化物聚集体。

ACTIVATION HISTORY AND ORE-FORMING PROCESS OF GOLD IN THE CRUST AT WUTAI-HENGSHAN REGION

Wutai-Hengshan region is a low content abundance region of gold. But gold in the metavolcanite in Wutai group had activated and redistributed three times during the process of diagenetic, metamorphic and weathering-resediment. Regional metamorphism resulting in gold activation forms industrial mineral deposit. There are obvious geology-geochemistry differentiation between gold deposit related to granitoid of transitional syntectic type in Mesozoic era and hydrothermal gold deposit of regional metamorphism in the region. So they show direct growth and decline of the relations between the scale and the intensity of gold mineralization and the gold abundance of granite body. The gold in the deposits originated from gathering body of gold and heavy metal sulphide that are related or syntected and unevenly distributed in the lower crust and upper mantle.