⁴⁰Ar/³⁹Ar dating, fluid inclusions and S–Pb isotope systematics of the Shabaosi gold deposit, Heilongjiang Province, China

Abstract

The Shabaosi deposit is the only large lode gold deposit in the northern Great Xing'an Range. The gold ore bodies are hosted by sandstone and siltstone of the Middle Jurassic Ershi'erzhan Formation, and are controlled by three N–S‐trending altered fracture zones. The gold ore bodies are composed of auriferous quartz veinlets and altered rocks. Fluid inclusion studies indicate that the ore‐forming fluids belong to a H2O–NaCl–CO2–CH4 system, with salinities between 0.83 and 8.28 wt% NaCl eq., and homogenization temperatures ranging from 180 to 320 °C. The δ34S values of sulphides show a large variation from −16.9‰ to 8.5‰. The Pb isotope compositions of sulphides are characterized by a narrow range of ratios: 18.289 to 18.517 for 206Pb/204Pb, 15.548 to 15.625 for 207Pb/204Pb, and 38.149 to 38.509 for 208Pb/204Pb. The μ values range from 9.36 to 9.51. These results suggest that the ore‐forming fluids/materials were mainly of magmatic hydrothermal origin, derived from magmas produced by partial melting of the lower crust. The 40Ar/39Ar age of auriferous quartz veinlets from the Shabaosi gold deposit is about 130 Ma. The Shabaosi gold deposit has counterparts in similar orogenic gold deposits, and was formed during the post‐collisional setting of the Mongolia–Okhotsk Orogen. Copyright © 2014 John Wiley & Sons, Ltd.

Genesis of the Haigou gold deposit, Jilin Province, NE China: evidence from fluid inclusions,40Ar/39Ar geochronology and isotopes

“…The sulphide ores have δ 34 S values of −23.2‰ to −0.5‰ (average −10.6‰) showing a wide negative range. This feature is similar as some sediment‐hosted orogenic gold deposits distributed in the northern margin of the NCC, in the eastern part of the Yilgarn Craton or in New Zealand (Craw et al ., ; Wang et al ., ; Liu et al ., ). One interpretation may be that sulphide ores were derived from the magmatic sources and the sulphide isotopic fractionation took place in process of the Au deposition.…”

Geology, geochemistry and genesis of the Suolong gold deposit in the West Qinling Orogen, Gansu Province, China

“…The genetic types of some of these gold deposits are still controversial. Based on the disseminated style of mineralization, alteration, the submicroscopic state of gold and the geochemical association of the Au‐As‐Hg‐Sb, some deposits were classified as the Carlin‐type gold deposit (Liu et al, 2014; Peng et al, 2018) or the Carlin‐like gold deposit (Liu et al, 2018; Liu et al, 2019; Liu, Dai, et al, 2015; Liu, Liu, et al, 2015). However, in view of their relationships to faults and shear zones and to the enrichment of CO 2 , many gold deposits were recognized as orogenic gold deposits (Li et al, 2018; Liu et al, 2016; Sui et al, 2018; Yang et al, 2016; Yu, Qiu, Nassif, et al, 2020; Yu, Qiu, Sai, et al, 2020; Zhou et al, 2014).…”

Geochronology, geochemistry, and zircon Hf isotopes of the late Permian–early Triassic Wuma intrusions in the Erguna Block, northeast China: Petrogenesis and implications for tectonic setting and crustal growth

“…Northeast China is situated between two major Precambrian cratons in Northeast Asia: the Siberian Craton in the north and the North China Craton in the south (Figure ). Traditionally, northeast China was thought to be influenced by the Paleo‐Asian and Paleo‐Pacific tectonic domains during the Palaeozoic and Mesozoic, and this region has been intensively studied (e.g., Cao, Xu, Pei, & Zhang, ; Feng et al, ; Feng et al, ; Ge et al, ; Ge et al, ; Ge, Wu, Zhou, & Abdel Rahman, ; Han et al, ; Han et al, ; Han et al, ; Hu et al, ; Jahn, Wu, & Chen, ; Li et al, ; Liu, Wu, Qiu, & Li, ; Pei et al, ; Wilde, Wu, & Zhang, ; Wu et al, ; Wu et al, ; Wu, Sun, Jahn, & Wilde, ; Wu, Sun, Li, Jahn, & Wilde, ; Yang, Ge, Zhao, Dong, et al, ; Yang, Sun, Gou, & Hou, ; Yu, Wang, Xu, Gao, & Tang, ; Zeng, Guo, Zhou, & Duan, ; Zhang & Li, ; Zhang et al, ; Zhang et al, ). Recently, detailed geochronological and geochemical work in the northern part of northeast China has shown that, in addition to the strong influence of the Paleo‐Asian and Paleo‐Pacific tectonic domains, the region was also influenced to some extent by the Mongol–Okhotsk tectonic domain (e.g., Meng et al, ; Tang et al, ; Tang, Xu, Wang, Zhao, & Li, ; Tang, Xu, Wang, Zhao, & Wang, ; Wang, Xu, Wang, & Meng, ; Xu, Xu, Meng, & Wang, ; Xu et al, ).…”