MAIN TECTONIC FEATURES OF THE LITTLE QINLING GOLD BELT ( CENTRAL CHINA )
Li Youzhua, Xie Xing a , Gao Siyuan b , Xu Wenshic
a Chang'an University, 126 Yanta Road, Xi'an, 710054, China
b Group 712, Northwestern Geological Prospecting Nonferrous Metal Department, Ministry of Metallurgy,
12 Weiyang Road, Xianyang, 712000, China
c China Geological University, 29 Xiueyuan Road, Beijing, 710054, China
Keywords: Gold belt; anticlinorium; ore body; ore conduits; ductile-shear faults
Pages: 199-203
Abstract
We discuss main tectonic features of the Little Qinling gold belt in Central China, located along the northern border of the eastern Qinling E-W tectonic zone, which hosts hydrothermal lode gold deposits. The distribution of deposits and the strike of ore bodies are controlled by the Dayueping-Jinluoban anticlinorium and the related faults, namely large ductile-shear faults on its flanks striking parallel to the uplift axis and some large faults in the north and south. Mineralization is associated with smaller-scale mylonite zones of brittle-ductile deformation. The Dayueping-Jinluoban dome went through several stages of tectonic evolution (compression → folding → doming → strike-slip faulting → extensional faulting → reshearing) accompanied by regional deformation, metamorphism, migmatizition and mineralization.
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