Early Cretaceous dioritic rocks in the Tongling region, eastern China: Implications for the tectonic settings

Structural Controls on Copper Mineralization in the Tongling Ore District, Eastern China: Evidence from Spatial Analysis

“…The Yanshanian magmatism resulted in more than 70 intrusions that are mainly composed of granodiorite, quartz monzonite, gabbro monzonite and their hypabyssal equivalents [26,49]. High-precision zircon U-Pb dating results have shown that the intrusions of this region were formed in the Early Cretaceous (mainly 145-129 Ma) [50,51]. The copper-polymetallic deposits discovered in the TOD are dominated by skarn-type, with minor porphyry-type copper deposits occurring in the deeper parts of some skarn deposits [45,50,51].…”

“…High-precision zircon U-Pb dating results have shown that the intrusions of this region were formed in the Early Cretaceous (mainly 145-129 Ma) [50,51]. The copper-polymetallic deposits discovered in the TOD are dominated by skarn-type, with minor porphyry-type copper deposits occurring in the deeper parts of some skarn deposits [45,50,51]. More than 60 copper-polymetallic skarn deposits and prospects have been discovered in the TOD, mainly clustering in four ore fields designated as Tongguanshan, Shizishan, Fenghuangshan and Shatanjiao ore field from west to east (Figure 1b).…”

“…Since regional faults are considered to control the emplacement of intrusions according to many previous studies [45,48,50], we also performed distance distribution analysis to investigate the correlation of intrusion with the faults of various orientations. The results show that the EW-, NS-trending faults and their intersections have statistically significantly positive correlations with intrusion regions at most of the buffer distances (Figure 15a-c).…”

Mesozoic large scale magmatism and mineralization in South China: Preface

“…Uranium deposits are controlled by F, the chemical form of U and other physic-chemical conditions (Chen et al, in press). (5) Copper ore-bearing porphyries are systematically older than ore-barren dacite and granite in the Lower Yangtze River belt (Li et al, 2012b;Xie et al, 2012;Yang and Zhang, in press). Based on zircon U-Pb ages and Hf isotopic compositions, it is proposed that the petrogenetic mechanisms of the Lower Yangtze River belt include slab tearing and lithospheric extension .…”

Qian'echong low-F porphyry Mo deposits in the Dabie Mountains, central China

“…The Qinling-Dabie orogenic belt is the largest Mo belt in the world, with a total of N8 million tons of Mo metal so far proven (Chen and Wang, 2010;Li et al, 2000;Li et al, 2007;Li et al, 2012a;Mao et al, 2008;Xie et al, 2012;Zhang et al, 2014). Previous studies suggested that the Shapinggou deposit is a Climax-type porphyry Mo deposit (Zhang et al, 2014).…”