福建省金矿床成矿时代特点

福建是我国东南沿违法乱纪半区金矿产区之一，既是古特提期成矿域东缘的组成部分，又受中国东部中生代环太平洋成矿带成矿作用的强烈叠加，且与基底变质岩（前寒武系）关系密切。福建金矿床总体具有成矿物质主要来源于基底变质岩，后期岩浆液改造富集，与不同层次的剪切带有关，受区域构造控制等特点。其成矿时代特征则具有“一老一新两期（元古宙和中生代且以中生代为主）成矿”和“成矿物质来源老，矿床定位时代新”等特点，金矿床成矿时代普遍为中生代或与中生代岩浆活动关系密切。此外，福建与华南地区的金矿床在地质特征上具有比较多的一致性，而与华北和西北地区在成矿时代特点上存在一定的差异性。

DISCUSSION ON THE METALLOGENIC EPOCH OF GOLD DEPOSITS IN FUJIAN PROVINCE, SOUTHEAST CHINA

The Fujian province has presently become one of the most important gold -producing area in southeast China. As a part of southeast of China, it geologically pertains to the east part of paleo-Tethys metallogenic province and is also controlled by strong reformation of super imposed mineralization of the circum-Pacific metallogenic belt in Mesozoic era. The gold deposits in Fujian province are featured by closely relating to the metamorphic rocks, strongly being controlled by tectonic zone. The gold element was mainly from metallogenic materials of Precambrian metamorphic rocks, magmatic activity as well as ductile shear zone. The metallogenic epoch of gold deposits in Fujian province of southeast China can be summarized as follows. (1) One older epoch (Proterozoic era) and one younger epoch (Mesozoic era, that is much more significant). (2) The age of metallogenic material is much older than the mineralizing age of the deposit. (3) Mesozoic era is the most important metallogenic epoch of gold deposits and (4), the characteristics of metallogenic epoch in the Fujian province of southeast China are similar to south China, but is difference from the north and northwest of China and overseas.