Geology, fluid inclusion, and stable isotope systematics of the Dongyang epithermal gold deposit, Fujian Province, southeast China: Implications for ore genesis and mineral exploration

In situ chemical and isotopic analyses and element mapping of multiple-generation pyrite: Evidence of episodic gold mobilization and deposition for the Qiucun epithermal gold deposit in Southeast China

“…Assuming a temperature of 250°C, the corresponding range and mean δ 34 S H2S values are -5.1 to 3.1 ‰ and -1.2 ‰, respectively. The δ 34 S values reported here are also very close to those in nearby magmatic-hydrothermal deposits (e.g., the Ancun, Xiaban, Dongyang Au deposits), which are generally in the range of -4 to 2 ‰ (Li et al 2018a, b). This demonstrates that most of the gold deposits in the Dehua goldfield had a similar magmatic sulfur source.…”

Origin of Late Jurassichigh‐Kfelsic volcanic rocks and related Au mineralization in the Dongyang deposit, central‐eastern Fujian,SEChina, and its tectonic implications

“…The similarity of these ages with the Rb–Sr isochron age of 152.4 ± 1.7 Ma (Xu, Sun, Lei, et al, 2019) for pyrite samples from gold‐pyrite‐sphalerite veins suggests that gold mineralization at Dongyang is genetically related to the felsic magma. Generally, Au mineralization in the region has been dated at 158–150 Ma (Late Jurassic; Ding, 2015; Jiang, 2015; Li et al, 2016, 2018; Qiu, Li, et al, 2017, Qiu, Yan, et al, 2017; Xu, Sun, Liang, et al, 2019; Xu, Sun, Lei, et al, 2019; Yan et al, 2018).…”

“…The presence of metamorphic zircons (250–220 Ma) indicates that the crust within the CB was strongly reworked by a late Permian‐Early Triassic orogenic event (e.g., Xia, Xu, & Zhu, 2012; Xiang et al, 2008; Yu et al, 2009). The most interesting feature is that the CB also contains voluminous Yanshanian magmatic rocks that are thought to be associated with the northwestward‐directed subduction of the Palaeo‐Pacific Plate beneath the Eurasian Plate (e.g., Wang et al, 2016; Zhou et al, 2006; Zhou & Li, 2000), and magmatic or hydrothermal activity can scavenge and transport metals and ligands from basement units to shallower locations that are favourable for the formation of mineral deposits (Li et al, 2018; Zhang et al, 2015). For example, the Dehua‐Youxi‐Yongtai mining camp in central‐eastern Fujian Province hosts more than a dozen gold deposits, such as Qiucun, Dongyang, Shuangqishan, and Dadongkeng (Lei, Sun, Xu, Han, & Liu, 2019; Xu et al, 2017; Xu, Sun, Lei, et al, 2019).…”

“…In Fujian Province, these epithermal gold deposits developed along the southeastern coast (Chen & Wang, 2012), and the Dongyang area in Dehua County is the main prospecting area for gold mineralization in central‐eastern Fujian Province (Figures 1b and 2; Xu & Yue, 1999a; Qiu, Yan, et al, 2017). The special position makes it distinct with respect to the variety of types of magmatic rocks, especially those associated Au mineralization and the metallogenic peak from the southeast coast magmatic belt (Li et al, 2018; Qiu, Li, et al, 2017; Xu, Jiang, Luo, Zhao, & Ma, 2017, Xu et al, 2019). More than 10 large‐scale Au ore deposits have been discovered in this belt, such as Zijinshan, Qiucun, Dongyang, and Shuangqishan, and these deposits generally formed in the Early Cretaceous and Late Jurassic (Chen, 2012; Liang et al, 2013; Ni et al, 2018; Xu et al, 2019), which is similar to the W–Sn mineralization in eastern Guangdong Province that formed in the Late Jurassic (e.g., Huang, Li, Li, & Li, 2013; Jiang et al, 2013; Xu et al, 2015, 2016).…”

Corrosion Behavior of a Pyrite and Arsenopyrite Galvanic Pair in the Presence of Sulfuric Acid, Ferric Ions and HQ0211 Bacterial Strain

“…The chemical formulas of pyrite and arsenopyrite are FeS 2 and FeAsS, respectively. Pyrite and arsenopyrite are the two most important gold-containing minerals in gold ores [1][2][3][4]. Fine-grained or submicroscopic gold is disseminated within pyrite and arsenopyrite, thereby rendering gold inaccessible to cyanide solutions [5].…”