Hydrothermal alteration associated with Mesozoic granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong Gold Province, China

Fluid inclusions at different depths in theSanshandao gold deposit,JiaodongPeninsula,China

“…Structures along the fault zone are mainly characterized by brittle fracturing, throughout a zone of 50–200 m in width (Li et al . ).…”

“…These boreholes are of interest because they intersect multiple ore lenses that contain both phases of gold mineralization and associated quartz veining, and display the transition from sulfidation‐silicification‐sericitization alteration associated with mineralization through to K‐feldspar altered granite (Li et al . ).…”

Orogenic gold: Common or evolving fluid and metal sources through time

“…McCuaig and Kerrich (1998) summarized the rare cases of REE enrichment in orogenic gold deposits as reflecting input from high-salinity alkali magmatic hydrothermal fluids unrelated to the gold event or changes in absolute abundances due to volume changes associated with wallrock alteration under high water-rock ratios. The Sr and Nd isotopes of ore-related hydrothermal minerals in the Jiaodong province of eastern China overlap both ore host-units (Li et al, 2013), crustally-derived Jurassic granitoids, and, less significantly, the Archean basement gneiss, which further implicates a trap, and not necessarily a source area that must be at depth (e.g., Goldfarb and Santosh, 2014), for defining the radiogenic isotope signature.…”

Geochronology of the Guilaizhuang gold deposit, Luxi Block, eastern North China Craton: Constraints from zircon U–Pb and fluorite-calcite Sm–Nd dating

“…These gold deposits, with ages mostly in the range of 130-110 Ma, are mainly located within or proximal to Mesozoic granitoids, especially those with Late Jurassic-Early Cretaceous age, and characterized by quartz lode (Linglong-type) or disseminated (Jiaojia type) styles of mineralization with extensive alteration of wall rocks (Hart et al, 2002;Nie, 1997;Qiu et al, 2002;Zhou et al, 2002;Guo et al, 2013;Hu et al, 2013;Li et al, 2013;Li and Santosh, 2014). Compilations of the geochronologic and isotopic data on the host rocks, ores and minerals associated with these gold deposits indicate that bulk of the mineralization formed during early Cretaceous broadly coeval with the peak of extensive magmatism and lithospheric thinning in the NCC during early Cretaceous (e.g., Goldfarb and Santosh, 2013;Li and Santosh, 2014;.…”