河南熊耳山地区金矿成矿时代的古地磁研究

THE PALAEOMAGNETIC STUDY OF THE MINERALIZATION AGE OF GOLD DEPOSITS IN THE XIONGERSHAN AREA, HENAN PROVINCE

通过对河南熊耳山地区前寒武纪地层及该地区北岭的蚀变岩型金矿、鸡冠山的石英脉型金矿和店房的角砾岩型金矿的古地磁研究,结合地质上的研究成果,认为北岭蚀变岩型金矿和店房的角砾岩型金矿的成矿作用始于元古宙,有后期成矿作用的叠加,鸡冠山石英脉型金矿则是燕山期成矿。

Different types of gold deposits have been found in the Middle Proterozoic rocks of the Xiongershan area, Henan province, at the south margin of the North China platform, but different views have been proposed about the mineralization age of the gold deposits.On the basis of palaeomagmatic studies of the Middle Proterozoic and other rocks of the region as well as the gold ores and their wall rocks, with due consideration of their geological setting, the authors infer that the gold mineralization of the Beiling alteration-type gold deposit and the Dianfang breccia-type gold deposit started in the Proterozoic and then was superimposed by later mineralization. But the mineralization age of the Jiguanshan gold deposit is Yanshanian.