Abstract:

Xiongershan is an important concentration area of gold mineralization in western Henan. By studying geochemical compositions, trace elements, REE, stable isotopes of Huashan granite and its relations with gold deposits, the following research achievements have been obtained: (1)R-clustering spectrum diagram shows that correlations of trace elements such as Au, Ag, Pb, Cu, Ba of granite and gold deposits tend to continuity; (2)REE distribution pattern shows similar right-dipping forms of granite and the altered rocks; (3)Na⁺-K⁺-Ca²⁺+Mg²⁺ composition of fluid inclusions diagram shows intimate relationship between gold metallogenic fluids and magmatic hydrothermal fluids; (4)Space-time distribution of structure-controlled alteration rock type gold deposits and explosion-breccia type gold deposits in Huashan area is controlled by linear structures of Huashan granite; (5)Metallogenic epoch of the gold deposits is Yanshanian period, and the rock-forming age of Huashan granite occured in 81-159 Ma; (6)S, H, O and Pb isotopes show that the ore-forming fluid and metallogenic material come from magmatic hydrothermal fluids

Key words: Huashan granite, gold mineralization, Xiongershan, Henan