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邢家山钼矿床是胶东唯一达大型规模的矽卡岩型钼(钨)矿,本文在详细野外调研的基础上,划分了成矿期次,通过元素地球化学及同位素地球化学示踪成矿物质来源及形成时代并结合区域成矿背景探讨了成矿机制。该矿床成矿过程可划分为岩浆热液期(包括早期矽卡岩阶段、中期硫化物阶段和晚期碳酸盐岩阶段)和表生氧化期,钼矿化主要发生于中期硫化物阶段,辉钼矿主要赋存于石榴石透辉石矽卡岩和透辉石符山石矽卡岩中,为岩浆热液交代作用过程产物。成矿母岩幸福山岩体中SiO2、Al2O3和Fe2O3等物质迁出,为矽卡岩矿物形成提供了丰富的物源,矽卡岩和花岗岩的稀土和微量元素配分相似,显示二者具有成因关系,稀土明显富集LREE;钼矿化矽卡岩中δEu、δCe的变化较小,离矿区较远的铅锌矿化大理岩中δEu显示较小的负异常、δCe显示较弱正异常。C-O同位素测试数据显示,大理岩中C来源于海相碳酸盐岩,而热液方解石脉中C主要来源于岩浆岩;辉钼矿中Re含量较低指示着成矿物质来源于下地壳。该矿属于形成于燕山早期的岩浆接触交代矽卡岩型钼矿床。
Xingjiashan molybdenum deposit is the only large-scale skarn-type molybdenum (tungsten) ore in Jiaodong. Based on the detailed field investigation, this paper classified the mineralization stages and trace mineralization through elemental geochemistry and isotope geochemistry Source and formation of the era and combined with the regional metallogenic background to explore the metallogenic mechanism. The mineralization process of the deposit can be divided into the magmatic hydrothermal period (including the early skarn stage, the mid-stage sulphide stage and the late carbonate stage) and the epiphytic oxidation stage. The molybdenum mineralization mainly occurs in the mid-stage sulphide stage. The molybdenum deposit mainly occurs in garnet diopside skarn and diopside Fu Shan rock skarn, which is the product of metasomatic hydrothermal replacement. The metallogenic parent rock in the Xingfu Mountain rock body, such as SiO_2, Al_2O_3 and Fe_2O_3, migrated out of the metallogenic parent rock, which provided a rich source for skarn mineral formation. The rare earth and trace elements in skarn and granite are similar, indicating that both have genetic , And REE is enriched in LREE. ΔEu and δCe in the molybdenum mineralized skarn are less changed. ΔEu in lead-zinc mineralized marble farther away from the ore area shows smaller negative anomalies and δCe shows weaker positive anomalies. C-O isotope test data show that C in marble originated from marine carbonates, whereas C in hydrothermal calcitic veins mainly came from magmatic rocks. The low Re content in molybdenite indicates that the ore-forming materials originate from the lower crust. The mine belongs to the formation of early Yanshan contact magmatic contact skarn molybdenum deposit.