中国矽卡岩型金矿的成矿时间、空间、地球动力学背景和成矿模式

矽卡岩型金矿床是我国最主要的金矿类型之一，目前已确定至少14个矿床为大型，24个为中型，占我国黄金总储量的15%。中国矽卡岩型金矿床的成矿时间与其所在地区最晚的碰撞造山作用时间吻合，就位于碰撞造山作用的晚期；中国矽卡岩型金矿床分布在碰撞造山带、断裂岩浆带和陆缘活动带，它们都经历了强烈的显生宙碰撞造山作用；成矿地球动力学背景为碰撞造山作用的挤压-伸展转变期。无论是中国矽卡岩型金矿床的地质地球化学特征，还是含矿岩体的地质地球化学特征，都与碰撞造山成矿模式完全吻合，证明碰撞造山成矿模式是中国绝大多数矽卡岩型金矿床的成矿模式。

Mineralization Time, Space, Geodynamic Background and Metallogenic Model of the Skarn Gold Deposits, China

Skarn type is one of the major types of the gold deposits of China, with at least 14 large and 28 medium deposits discovered. The total skarn type reservoir is more than 700 tons which accounting for more than 15% in the total gold reservoir of China. The mineralizing time of skarn gold deposits is mainly of late Mesozoic (Yanshanian),contemporaneous with the collision orogenesis occurred in the mainland of China; the gold orebodies emplaced in the late stage of the collision orogenesis. Almost all the skarn gold deposits distributed in the collision orogenic belts, fault magmatic belts and marginal mobile belts,especially in the Lower Yangtze River district. Their metallogenic geodynamic background was the compression extension transition stage of collision orogenesis. The geological and the geochemical characteristics of the skaRn gold deposits and their related igneous intrusions are exclusively coincident with the metallogenic model for collision orogensis or for A type subduction. It shows that the metallogenic model for collision orogenesis is the oreforming models for the most of the skarn gold deposits, China.