辽东南金矿床成矿模式及找矿信息

METALLOGENIC MODEL AND PROSPECTING INFORMATION FOR GOLD DEPOSITS IN SOUTHEAST LIAONING

在辽东南地区工作研究成果基础上,重点解剖了已开采和勘查的金矿床,总结出金矿成矿规律,阐明中生代印支-燕山期为主要金矿成矿期,划分了6个金矿化区,综合辽东古裂谷的演化过程建立了裂谷产生→矿源层及容矿围岩形成→裂谷消亡及某些矿床雏形的形成→裂谷活化进入主成矿期的矿床成矿模式,指出了找矿信息。

We have investigated and researched the regional geologic conditions for two years on the basis of as much research achievements as we could collect, particularly dissecting the explored or mined gold deposits by means of combining the macroscopic geologic conditions with the microscopic test results. A regular pattern how the structures, wallrocks, magmatic rocks and metamorphism control gold deposits is summed up and it is expounded that the period from lndo-Sinian cycle to Yanshan cycle is the main epoch of metallization. Six Au metallogenic belts of Wulong-Sidaogou, Qingchengzi, Maoling-Wangjiaweizi, Dongsheng, Huangtuling-Luwang and Fenshui-are differentiated according to the metallization-controlling factors which are the tectonics or structures, magmatic rocks and strata. By synthesizing the evolution of Liaodong paleorift, further, a metallogenic model of the rift＇s coming into being →the forming of the source beds and the wall rocks →the withering away of the rift and the forming of some embryonic forms of gold deposits →the reacting of the rift and the emerging of the main epoch of metallization is set up. Ore --finding information is pointed out As well in this paper.