宁芜向山—皇姑山地区铁硫矿床中及附近存在大片硅质岩,属热泉沉积的硅华。其微量元素Al、Mn、Cu、Pb、Zn含量较高,且具有稀土元素总量较低,Ce明显亏损,Eu明显富集等特征。据岩石学、岩石化学特征,结合微量元素、稀土元素与同位素等综合研究表明,矿床附近硅质岩为热水成因,硅质可能来自下伏及深部地层。 Ning Wu Xiang Xiangshan - Huang Gushan iron and sulfur deposits in the vicinity of large areas of chert, is a hot spring deposition of silicon. The contents of trace elements Al, Mn, Cu, Pb and Zn were high, and the contents of rare earth elements were lower, Ce was obviously depleted and Eu was obviously enriched. According to the comprehensive study of petrology, petrochemistry, combined with trace elements, rare earth elements and isotopes, it is shown that the cherts in the vicinity of the deposit are of hydrothermal origin, and the siliceous rocks may come from underlying and deep formations.