五台山地区条带状铁建造中金矿化带的地质地球化学特征及成因

GEOCHEMICAL SIGNATURES AND ORIGIN OF THE GOLD MINERLIZED ZONES OF BANDED IRON FORMATION IN WUTAI MOUNTAINS

五台山区条带状铁建造中金矿化带产于五台山绿岩带地层的金刚库组和柏枝岩组中，矿化体断续分布在铁建造下部与变镁铁质火山岩呈薄层互层状产出的金－铁建造中，主要矿化岩石为黄铁矿化或碳酸盐化磁铁石英岩。对矿化岩石的地质地球化学研究表明，矿化带是在早期火山喷气热液作用下形成的金铁建造，经过变质热液的活化和再富集形成的。

The gold minerlized zones of banded iron formation occurr in Jingangku and Baizhiyan formations of wutai Mountains greenstone sequence. The ore bodies spread separately in the iron-poor thin layers which are interbeded with the metamorphic mafic volcanics of the lower parts of the main iron formations. The gold-minerlized rocks are mainly magnetite-quartzites with the alterations of pyrite and carbonate.The geochemical signatures of mineralized rocks show that the gold-mineralized zones are generated from the gold-bearing iron formations formed early in the emanation of volcanic hydrothermal solution,which experienced the moblization and re enrichiment of metamorphic hydrothermal solution.