港西断裂带包裹体中硫化氢的成因探讨

GENESIS OF HYDROGEN SULFIDE IN FLUID INCLUSIONS IN GANGXI FAULTED ZONE

对黄骅坳陷港西断裂带奥陶系和第三系包裹体样品的氯同位素分析以及对单个包裹体激光拉曼组分测试表明，包裹体普遍具有地幔成因，且局部十分富集，同时发现包裹体中的硫化氢含量较高，范围分布在5．5％～15．2％（摩尔分数）之间。文章探讨了其硫化氢的来源，认为工区硫化氢的来源可能为幔源、岩浆-火山岩和硫酸盐热化学还原形成，生物成因和裂解成因的可能性较小，并指出高含硫气藏的有利区带位于断裂带附近和火山活动频繁区带。

Based on analyses of Helium isotope and laser Raman spectroscopic component of Ordovician and Tertiary inclusion samples in Gangxi faulted zone of Huanghua depression, it is believed that the inclusions are commonly mantle-derived and are locally enriched. In addition, the content of hydrogen sulfide in the inclusions is relatively high, ranging from 5.5 to 15.2 mol%. Commercial hydrogen sulfide reservoirs may be formed when the content of hydrogen sulfide reaches 2%. It is predicted that the hydrogen sulfide in the inclusions might be sourced from the mantle, magma-volcanic rocks and thermal sulphate reduction, and is unlikely to be of biogenesis and cracking genesis. Areas near the faulted zone or with frequent volcanic activities are believed to be favorable for exploration of high-surfur reservoirs.