河北地质大学学报2026，Vol.49Issue(1)：1-11,11.DOI:10.13937/j.cnki.hbdzdxxb.2026.01.001
华北克拉通中部义兴寨金矿孙庄岩体的成因成矿作用:来自黑云母成分的约束
Genetic and Metallogenic Implications of the Sunzhuang Intrusion in the Yixingzhai Gold Deposit,Central North China Craton:Constraints from Biotite Composition
摘要
Abstract
To elucidate the relationship between magmatic evolution and mineralization in the Yixingzhai gold deposit,western North China Craton,this study focuses on biotite from various lithologies of the Sunzhuang intrusion and conducts a detailed genetic mineralogical investigation.Petrographic observations and electron microprobe analyses were employed to systematically determine the major and halogen compositions of biotite,as well as to estimate its crystallization temperature,oxygen fugacity,and magma source characteristics.The results show that biotite from the Sunzhuang intrusion is characterized by high Mg and K but low Ti and Na contents,with MgO concentrations ranging from 13.4％to 17.8％,indicative of a crust-mantle mixed-source signature.Calculated crystallization temperatures range from 690 to 771℃,with logfO2 values between-17.1 and-14.9.In addition,the biotite is enriched in F,Cl and H2O.These geochemical characteristics suggest that the Sunzhuang intrusion was derived from a high-temperature,high-oxygen-fugacity,volatile-and halogen-rich magma formed by crust-mantle interaction.Such magmatic conditions favored the mobilization and enrichment of oxyphile metals such as Cu and Au,providing both the material source and thermal-fluid driving force for the formation of porphyry-type Cu-Au deposits.Consequently,the magmatism of the Sunzhuang intrusion is closely related to the metallogenesis of the Yixingzhai gold deposit.关键词
义兴寨金矿/孙庄岩体/黑云母/成因矿物学/成矿作用Key words
Yixingzhai gold deposit/Sunzhuang intrusion/biotite/genetic mineralogy/metallogenesis分类
天文与地球科学引用本文复制引用
朱伊冰,梁贤,张乐民,赵志福,吴宇天,张聚全..华北克拉通中部义兴寨金矿孙庄岩体的成因成矿作用:来自黑云母成分的约束[J].河北地质大学学报,2026,49(1):1-11,11.基金项目
国家自然科学基金项目(U2444208) （U2444208）
深地国家科技重大专项(2025ZD1006400) （2025ZD1006400）
河北省自然资源厅地勘项目(13000023P00F2D410251H,13000024P00F2D4104649) （13000023P00F2D410251H,13000024P00F2D4104649）
河北省中央引导地方科技发展资金项目(246Z4205G) （246Z4205G）
