福建紫金山矿田早白垩世以来构造演化和成岩成矿时空格架

在充分吸收已有工作成果的基础上，文章系统总结了紫金山矿田的典型矿床类型及特征，探讨了早白垩世伸展构造背景下该矿田成岩成矿作用与北西向上杭—云霄成矿带的关系，并建立了早白垩世（145 Ma~）到晚白垩世早期（~92 Ma）紫金山矿田成岩成矿作用的时空格架。研究认为由于古太平洋板块俯冲作用体系的影响，早白垩世以来（145 Ma~）紫金山矿田总体上受北西向上杭—云霄深断裂多次活化作用的控制，依次经历了145~120 Ma伸展初期小规模的岩浆—成矿活动、125~110 Ma短暂的岩浆间歇期、110~92 Ma幔源物质大规模参与的岩浆活动及相应的斑岩型—浅成低温热液型（Cu-Au-Mo-Ag）多金属成矿作用。 

THE EARLY-CRETACEOUS TECTONIC EVOLUTION AND THE SPATIAL-TEMPORAL FRAMEWORK OF MAGMATISM-MINERALIZATION IN ZIJINSHAN ORE-FIELD, FUJIAN PROVINCE

This paper presents a systematic review of major types and characteristics of the representative deposits in the Zijinshan ore-field by integrating with previous studies, which is in an attempt to establish the spatial-temporal framework of magmatic-metallogenic events during 145~92 Ma time interval and, on that basis, investigate its relationship with the NW-trending Shanghang-Yunxiao mineralization belt under the Early Cretaceous extension setting. We conclude that the magmatism-mineraliztion of the Zijinshan ore-field was mainly controlled by the multiple activation of the NW-trending Shanghang-Yunxiao deep fault in response to Pacific plate subduction. There occurred a small scale of the magmatism and metallogenesis in the Zijinshan ore-field when the regional tectonic regime inversed from compression to extension (145~125 Ma), whereas the intense crust-mantle interaction induced large scale of magmatism and mineralization during the 110~92 Ma in response to the enhanced crust extension, which resulted in generating the giant Zijinshan porphyry-epithermal Cu-Au-Mo-Ag ore system. It''s worth noting that a transient tectonic inversion lasted from 125~110 Ma separated the two extension stage mentioned above. These transpression gave rise to the short magmatic quiescence in our study area.