CAJ | 학술논문

为了研究大河边重晶石矿床中有机质来源和沉积环境，对重晶石矿石及围岩进行有机碳、硫、氯仿沥青“A”及其族组成和饱和烃气相色谱?质谱等测试分析，并对有机质丰度和成熟度等有机地球化学特征进行研究。结果表明：重晶石矿石和围岩中有机质含量和成熟度均较高，表明其经历了类似的地质作用过程；生物标志物指标和图解表明有机质来源以海洋细菌和藻类等低等生物为主，有机质形成于强还原和高盐度的沉积环境。高盐度和碳分布等特征表明有热液参与成矿，矿床盐度分布特征表明海底热液喷口在猪圈湾和大河边附近。
위료연구대하변중정석광상중유궤질래원화침적배경，대중정석광석급위암진행유궤탄、류、록방력청“A”급기족조성화포화경기상색보?질보등측시분석，병대유궤질봉도화성숙도등유궤지구화학특정진행연구。결과표명：중정석광석화위암중유궤질함량화성숙도균교고，표명기경력료유사적지질작용과정；생물표지물지표화도해표명유궤질래원이해양세균화조류등저등생물위주，유궤질형성우강환원화고염도적침적배경。고염도화탄분포등특정표명유열액삼여성광，광상염도분포특정표명해저열액분구재저권만화대하변부근。
To research the organic matter sources and sedimentary environment in Dahebian barite deposit, barite ore and wall rock were used for the analyses of organic carbon, sulfur, chloroform bitumen“A”and their group composition and saturated hydrocarbons detected by gas chromatography, and the organic geochemistry characteristics involving the organic matter abundance and maturity were discussed. The results show that both the content and grade of maturity of the organic matter are high in barite ore and host rock, which makes it clear that the barite ore and host rock experience similar geological processes. Biomarkers indices and diagrams show that the organic matter is mainly sourced from lower organisms such as marine bacteria and algae, and formed in a sedimentary environment of high reduction and high salinity. The distribution characteristics of high salinity and organic carbon in barite ore and host rock show that hydrotherm is involved in metallogenesis, while the distribution characteristic of the high salinity indicates that the undersea hydrothermal vents exist near Zhujuanwan and Dahebian in Tianzhu County.