Review of the regional nomenclature and tectonic setting for mesozoic gold deposits in the Malanyu Anticline area of Eastern Hebei Province, North China

Genesis of the Yu'erya gold deposit, East Hebei, China: Insights from geology and fluid inclusions

“…The Yu'erya gold deposit is located at the eastern section of the Yanshan orogenic belt in eastern Hebei. The gold‐bearing quartz veins occur in the northern margin of the Malanyu compound anticline (Bagas et al, 2020; Feng, 2017) and are controlled by the NEE‐ and NNE‐trending faults (Liu et al, 2016; Ye, 2012). The genetic type of the Yu'erya gold deposit is still controversial: (1) it is a magmatic‐hydrothermal deposit related to granitic magmas formed by partial melting of basal material in the lower crust (Chen, Li, et al, 2019); (2) the mineralizing fluid belongs to the medium‐low temperature, low salinity, low‐density NaCl‐H 2 O‐CO 2 ± CH 4 fluid system, and the estimated mineralization depth reaches 2.14 km, which can be considered as a epithermal deposit (Guo et al, 2017); (3) the mineralizing fluids with low salinity and high CO 2 indicate that it is an orogenic gold deposit (Bagas et al, 2020).…”

“…The Yu'erya gold deposit is located at the eastern section of the Yanshan orogenic belt in eastern Hebei. The gold-bearing quartz veins occur in the northern margin of the Malanyu compound anticline (Bagas et al, 2020;Feng, 2017) and are controlled by the NEE-and NNE-trending faults (Liu et al, 2016;Ye, 2012). The genetic type of the Yu'erya gold deposit is still controversial: (1) it is a magmatichydrothermal deposit related to granitic magmas formed by partial melting of basal material in the lower crust (Chen, Li, et al, 2019);…”

“…(2) the mineralizing fluid belongs to the medium-low temperature, low salinity, low-density NaCl-H 2 O-CO 2 ± CH 4 fluid system, and the estimated mineralization depth reaches 2.14 km, which can be considered as a epithermal deposit (Guo et al, 2017); (3) the mineralizing fluids with low salinity and high CO 2 indicate that it is an orogenic gold deposit (Bagas et al, 2020).…”

“…Previous studies have focused on the geology (Jia et al, 2014), mineralogy (Kong et al, 2013), ore-controlling structures (Niu et al, 2000), fluid inclusions (Guo et al, 2017) and geochronology (Chen et al, 2014;Chen, Ye, et al, 2019;Luo et al, 2001) of this deposit. However, the genetic type of the deposit is still controversial, which has been classified into a (1) magmatic-hydrothermal deposit (Chen, Li, et al, 2019;Kong et al, 2013), (2) epithermal deposit (Guo et al, 2017) and (3) orogenic gold deposit (Bagas et al, 2020). Geological characteristics and fluid inclusions are the important basis for distinguishing the genetic type of ore deposits (Chen et al, 2007).…”