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通过对冀东兴隆 -宽城地区多金属硫铁矿床中黄铁矿叠层石有机地球化学及生物标志化合物的研究。发现这些叠层石中 n C15- n C2 5规则类异戊二稀烷烃含量丰富 ,植烷 (Ph)、姥鲛烷 (Pr)含量较高。饱和烃 /芳烃之比为 1. 2～ 1. 9,有机质类型属低等生物为主的腐泥型 ,有机成熟度较高。研究结果表明黄铁矿叠层石是原生藻沉积构造。它们是在较封闭还原环境中 ,海底热水喷口附近嗜热藻细菌大量繁殖 ,并对喷气作用带来的成矿物质产生吸附作用与还原作用。从而在热液喷口附近发生了强烈的生物化学合成作用 ,形成了黄铁矿叠层石。藻类生物群落在热液丘堤表面的不均匀分布 ,产生了黄铁矿叠层石点状礁体。
Through the research on the organic geochemical and biomarker compounds of pyrite in the Xinglong - Huancheng polymetallic pyrite deposit in eastern Hebei Province. It was found that the n-C15-n C2 5 regular isoprenoids in these strata are rich in contents of phytane (Ph) and pristane (Pr). Saturated hydrocarbon / aromatics ratio of 1.2 to 1.9, the organic matter type is a low-level biological sapropelic type, high organic maturity. The results show that the pyrite strata are protolith algal sedimentary structures. They are in a more closed reduction environment, the seabed near the hot water spout hot algae bacteria multiply, and the jet effect of mineralization caused by adsorption and reduction. As a result, a strong biochemical synthesis occurred near the hydrothermal vents and a pyrite deposit was formed. The algae communities are unevenly distributed on the surface of hydrothermal dike, resulting in the formation of pyrite-lacustrine point-like reefs.