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高真空四极气相质谱系统分析表明长坑金银矿的硫化物矿物流体包裹体中存在9种轻烃有机气体,它们主要由C_(1-4)饱和烷烃和C_(2-4)不饱和烯烃和芳烃组成,但烷烃占绝对优势,而烯烃和芳烃含量很低;并且,这些有机气体主要来自中低温条件下水/岩反应所导致的沉积岩中有机质的热分解,成矿过程应基本未受到岩浆作用的影响。金矿和银矿硫化物样品中轻烃有机气体的组成说明两者的成矿过程可能相似。有机气体组成表明,该矿成矿时其大地构造背景为裂谷环境。
High-vacuum gas chromatography-quadrupole mass spectrometry analysis shows that there are 9 kinds of light hydrocarbon organic gases in the fluid inclusions of the sulfide minerals in the Changkeng gold-silver mine, which are mainly composed of C 1-4 saturated alkanes and C 2-4 unsaturated Alkenes and aromatics, but alkanes are predominant and alkenes and aromatics are low; and these organic gases are mainly due to thermal decomposition of organic matter in sedimentary rocks caused by water / rock reactions at low and intermediate temperatures, and the mineralization process should be essentially unobserved Effect of magmatic action. The composition of light hydrocarbon organic gases in gold and silver sulfide samples suggests that the mineralization processes may be similar between the two. The composition of organic gas shows that the tectonic setting of this mine is rifting environment.