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金山金矿是中国南方的一个重要金矿床,属于变质细碎屑岩型,产于中元古界双桥山群中。矿石由超糜棱岩型及石英脉型组成。对于其形成时代有晋宁期、燕山期、晋宁期—燕山期、晋宁期+加里东期—印支期—燕山期等多种观点。本文分别采取两种矿石测得其石英流体包裹体Rb-Sr等时线年龄为(406±25)Ma,属于加里东期成矿。根据研究,华南加里东期金矿床分布广泛,除产于华南加里东褶皱带外,也见于其北邻元古宙江南隆起中。产于隆起内的矿床围岩均为元古宙变质细碎屑岩,而产于褶皱带中除元古宙变质细碎屑岩外,还有寒武纪地层,澄江期及加里东期的岩体。华南加里东期金矿床与该区分布最广的燕山期金矿床在赋矿围岩时代、与燕山期岩浆活动的关系、元素组合、主要矿物及矿床类型等方面都有明显不同。研究结果表明华南是中国主要的加里东期成金区,它对研究其他早古生代褶皱带的加里东期成金作用具有启示意义。
Jinshan gold deposit is an important gold deposit in southern China, belongs to the metamorphic fine clastic rock type, produced in the Middle Proterozoic Shuangqiaoshan group. Ore from the super-mylonite rock type and quartz vein type composition. For its formation Jinning period, Yanshan period, Jinning period - Yanshan period, Jinning period + Caledonian - Indosinian - Yanshan period and other points of view. In this paper, the Rb-Sr isochron ages of (406 ± 25) Ma, measured by two kinds of ores, respectively, belong to Caledonian metallogenetic. According to the study, the South China Caledonian gold deposits are widely distributed except for the Caledonian fold belt in South China and also in the north of the Proterozoic Jiangnan uplift. The ore-bearing rocks in the uplift are all metamorphic fine metamorphic rocks, and are produced in the fold belt except the metamorphic metamorphic fine metamorphic rocks, as well as the Cambrian strata, Chengjiang and Caledonian Rock mass. The Caledonian gold deposit in South China and the Yanshanian gold deposit, which is the most widely distributed in the area, are obviously different in relation to the age of the ore-hosting rocks, the relationship with the Yanshanian magmatism, elemental assemblages, main minerals and types of deposits. The results show that South China is a major Caledonian gold deposit in China, which is of great significance for studying the Caledonian gold-forming effect of other Early Paleozoic fold belts.