地质科技通报2024，Vol.43Issue(2)：156-174,19.DOI:10.19509/j.cnki.dzkq.tb20220507
胶东大尹格庄金矿成矿流体时空演化及矿床成因:来自流体包裹体、成矿元素和H-O-S-Pb同位素证据
Ore genesis and vertical variations of ore-forming fluids in the Day-ingezhuang gold deposit,Jiaodong Peninsula:Constraints from fluid inclu-sions,ore forming elements,and H-O-S-Pb isotopes
摘要
Abstract
[Objective]The Dayingezhuang gold deposit in the middle of the Zhaoping metallogenic belt represents a typical altered-rock type deposit with a giant Au reserve of 283 tons on the Jiaodong Peninsula.The genetic type of the deposit is still controversial.[Methods]Based on detailed field observations,ore genesis and variations in ore-forming fluids from different depths were investigated in this study.[Results]Fluid inclusion studies show that the ore-forming fluids formed an H2O-CO2-NaC l±CH 4 system with moderate temperature,low salinity,and moder-ate-low density.Furthermore,the temperatures and salinities decrease gradually from the early to late mineraliza-tion stages(Ⅰ-Ⅳ),but the opposite occurs at densities.Hydrogen and O isotopic compositions show that the ore fluids were dominated by magmatic water in the early stage,with subordinate meteoric water input during the late stages.Fluid boiling occurred possibly during the main mineralization stages.Sulfur and Pb isotopes of pyrite indi-cate that the ore-forming materials were derived from deep crust-mantle mixed magma.Overall,the mineralization process and tectonic setting are similar to those of the other Jiaodong gold deposits in a craton-destruction environ-ment.[Conclusion]Comprehensive comparisons of ore fluids,Au and Ag contents,and gold fineness between shallow and deep ores show that ore fluids and mineralization intensity are consistent throughout the deposit.Gold precipitation has a broad and stable environment,indicating the great potential for mineral exploration in deep spaces.关键词
流体包裹体/H-O-S-Pb同位素/金成色/矿床成因/深部找矿/成矿流体/大尹格庄Key words
fluid inclusion/H-O-S-Pb isotopes/gold fineness/ore genesis/deep exploration/ore-forming fluid/Dayingezhuang分类
天文与地球科学引用本文复制引用
严子清,石文杰,张鹏涛,王勇军,邵玉宝,黄鑫,宋宇,谭俊,王治华..胶东大尹格庄金矿成矿流体时空演化及矿床成因:来自流体包裹体、成矿元素和H-O-S-Pb同位素证据[J].地质科技通报,2024,43(2):156-174,19.基金项目
国家自然科学基金项目(42273067) （42273067）
山东省部省协议地质勘查项目"山东省烟台市牟平区将军石-曲河庄断裂带深部金矿普查"(鲁勘字[2022]32号) （鲁勘字[2022]32号）
