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自然界的汞,多以硫化物的形式出现,纯汞实为罕见。而四川天然气中普遍含汞(蒸汽),其含汞量一般是147至5389毫微克/米~3,远高于大气及土壤气中的汞含量。因此研究天然气中汞的分布、成因及其地质意义,对天然气的勘探与开采有一定现实意义。一、汞的分布据对四川盆地震旦系上统(Zb)、寒武系中上统(∈_(2+3))、石炭系中统(C_2),二迭系阳新统(P_1),乐平统(P_2)、三迭系下统的嘉陵江组(Tc),中统雷口坡组(Tr),上
Mercury in nature, mostly in the form of sulfide, pure mercury is rare. In general, natural gas in Sichuan contains mercury (steam) and its mercury content is generally 147 to 5389 ng / m 3, which is much higher than the mercury content in the atmosphere and soil gas. Therefore, it is of practical significance to study the distribution, origin and geological significance of mercury in natural gas, and to explore and exploit natural gas. (1) Distribution of Mercury According to the data of Zb, the upper Cambrian (∈_ (2 + 3)), the Carboniferous (C_2), the Permian Yangxindong (P_1) , Leping system (P_2), Triassic system under the Jialing River Group (Tc), the Central Plains Lekou group (Tr), on