The Huayangchuan ore belt is located in the western segment of Xiaoqinling Orogen in the southern margin of the North China Craton (NCC), and hosts voluminous magmatism and signifi- cant U-REE-Mo-Cu-Fe polymetallic mineralization. However, geochronological framework of the vari- ous mineralization phases in this region is poorly understood. Here, we present new Re-Os isochron ag- es on magnetite from the Caotan Fe deposit (2675 ± 410 Ma, MSWD=0.55), and on pyrite from the Jialu REE deposit (2127 ± 280 Ma, MSWD=1.9) and Yuejiawa Cu deposit (418 ± 23 Ma, MSWD= 11.5), and Re-Os weighted average model age on pyrite from the Taoyuan Mo-U deposit (235 ± 14 Ma, MSWD=0.17). These ages, combined with regional geology and mineralization ages from other depos- its, suggest that mineralization in the Huayangchuan ore belt lasted from the Neoarchean to the Late Mesozoic. The mineralization corresponds to regional tectono-magmatic events, including the Neoar- chean alkali magmatism (REE mineralization), Paleoproterozoic plagioclase-amphibolite emplacement (Fe mineralization), Paleoproterozoic pegmatite magmatism (U mineralization), Paleozoic Shangdan oceanic slab subduction-related arc magmatism (Cu mineralization), Early Mesozoic Paleo-Tethys Ocean subduction-related arc magmatism (Mo-U mineralization), and Late Mesozoic Paleo-Pacific oce- anic plate subduction direction change-related Mo(-Pb) mineralization. We proposed that the Huayang- chuan ore belt has undergone prolonged metallogenic evolution, and the magmatism and associated mineralization were controlled by regional geodynamic events.

Hongjun Jiang;Chunsi Yang;Dequan Wang;Hui Zheng;Jie Li;Huayong Chen

Key Laboratory of Mineralogy and Metallogeny,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Geological Party No.214,Sino Shaanxi Nuclear Industry Group,Xi'an 710100,China;Sino Shaanxi Nuclear Industry Group,Xi'an 710100,China;State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of Mineral Physics and Materials,Guangzhou 510640,China

地球科学学刊（英文版）

[1]Hongjun Jiang;Chunsi Yang;Dequan Wang;Hui Zheng;Jie Li;Huayong Chen-.Multiple-Stage Mineralization in the Huayangchuan U-REE-Mo-Cu-Fe Ore Belt of the Qinling Orogen, Central China:Geological and Re-Os Geochronological Constraints)[J].地球科学学刊（英文版）,2022(01):193-204

Huayangchuan,Xiaoqinling,Caotan,Jialu,Yuejiawa,Taoyuan,Neoar,chean,Shangdan,oce,anic,Huayang,chuan

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