Silicon and oxygen isotope evidence for exhalative genesis of the Devonian Pb-Zn deposits in the Feng-Tai region, Qinling Mountains, China

The Devonian System in Qinling Mountains consists of thick flyschoid formation formed in E-W Paleozoic rifting basin between the Yangtze Plate and North China Platform. The Feng-Tai ore field is a part of the Qinling Devonian stratiform Pb-Zn metallogenic belt. The ore bodies are all stratiform or stratoid and occur in the transitional zone between the Middle Devonian Gudaoling limestone and the Upper Devonian Xinghongpu fine-groined clastic rocks. The host of the ore deposit is siliceous rocks containing ankerite and siderite. The siliceous rocks are stratiform and mainly composed of micritic quartz. The larger the