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我们从南朝鲜七个有代表性的金矿床中挑选十块标本进行K-Ar年龄测定.从与金井矿床含金白岗岩脉有关的伟晶岩中分离出来的微斜长石测出的年龄为晚元古代.从天安地区浩美、天宝和南仓三矿床的矿石和有关的伟晶岩中采集的白云母的年龄为130～160百万年,进一步证实了该区的金矿化时代为中侏罗-晚侏罗世.无极、林川和居昌三矿床绢云母的测定结果为100百万年左右.这些成果加上从文献中收集到的数据表明南朝鲜在目前剥蚀面上出露的大部分贵金属、贱金属和重金属矿床形成于白垩纪时期,与Bulgugsa长英质岩浆活动有成因联系.
We selected ten samples from seven representative gold deposits in South Korea for K-Ar dating, as measured from the micro-plagioclase isolated from the pegmatites associated with gold-bearing granite dikes in the Jinjing deposit The age of late Proterozoic.Among the 130 ~ 160 million years of muscovite collected from the ore of the Haomei, Tianbao and Nancang deposits and the related pegmatites in the Tian’an area, it further confirmed the gold mineralization age For the Middle Jurassic-Late Jurassic.The determination of sericite in the Promise, Linchuan and Juchang III deposits is about 100 million years.These results, together with the data collected from the literature, indicate that South Korea is exiting on the current denudation surface Most of the exposed precious metals, base metals and heavy metal deposits formed in the Cretaceous period, and the Bulgugsa feldspathic magmatism is causally linked.