Geological and geochemical character and genesis of the Jinlongshan-Qiuling gold deposits in Qinling orogen: Metallogenic mechanism of the Qinling-pattern Carlin-type gold deposits

The Qinling Carlin-type gold deposit belt is the second largest Carlin-type gold ore concentrated area in the world and occurs in Mesozoic intracontin ental collisional orogen, contrasting to the Carlin-type gold deposits in t he Basin and Range province in Cenozoic active continental margin of West A merica. With ore-forming ages focussed at the range of 197.45-129.45 Ma, it s metallogenic geodynamic background was the decompression-pyrogenation reg ime at the transition stage from collisional compression to extension, indi cating that gold mineralization synchronized with the Mesozoic continental collision. Geochemical studies discover that ore fluids and materials mainl y came from the Hercynian-Indosinian tectonic layer. Mesozoic intracontinen tal subduction of Hercynian-Indosinian association along the Shuanghe-Gongg uan fault led to the formation of Jinlongshan-Qiuling gold deposits. Accord ingly, the tectonic metallogenic model is established for Qinling-pattern C arlin-type gold deposits.