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通过对宣龙铁矿生物结构类型铁质叠层石、核形石和微生物鲕石所作的有机碳、正烷烃、生物标志物及干酪根红外扫描、元素组成和碳同位素分析，结合地质背景资料、微生物化石等地质标志探讨有机质在铁矿形成中的作用。研究表明，从有机地球化学的角度也可提供生物参与铁质沉淀的证据
Through the organic carbon, n-alkanes, biomarkers and kerogen infrared scanning, elemental composition and carbon isotope analysis of biotite-type stratigraphic, arcuate and microbial oolite in Xuanlong Iron Mine, combined with the geological background data, Microbial fossils and other geological markers to explore the role of organic matter in the formation of iron ore. Research shows that there is evidence that organisms can participate in iron precipitation from an organic geochemical point of view