机构地区: 中山大学地球科学系
出 处: 《矿产与地质》 2004年第5期405-409,共5页
摘 要: 西藏南部地区广泛发育中、新生代硅质岩,具有层状构造、纹理状构造、块状构造和角砾状等典型古热水沉积构造,其Al/(Al+Fe+Mn)比值、Co/Ni比值、Fe/Ti比值、氧同位素以及TiO2-Al2O3图解等地球化学特征显示为热水成因。藏南沉积硅质岩与锑、金多金属等矿化关系密切,成矿流体和热水流体有很强的相关性。 There occurred abundant cherts of Mesozoic and Cenozoic Age in south Tibet, the layered, laminated, massive and breccia structures indicate that the cherts are hydrothermal origin. Ratios of Al/(Al+Fe+Mn),Co/Ni,Fe/Ti and W(TiO_2) W(Al_2O_3) diagram also show that they are the results of hydrothermal sedimentation. The cherts have a close relationship with Sb、Au polymetallic mineralization and ore-forming fluid correlates strongly with hydrothermal water.