Characteristics and Pale-Fluid Activity Implications of Fluid-Inclusion and Isotope of Calcite Veins in Jingshan Area
详细信息
- 责任者：Yang Xingye (Key Laboratory of Tectonics and Petroleum Resources ; Ministry of Education ; China University of Geosciences ; Wuhan 430074 ; China) ; He Sheng
- 刊名：Journal of China University of Petroleum
- 出版年：2013
- 卷期：37(1)
- 关键词：流体包裹体 ; fluid inclusions ; 湖北 ; Hubei Province
- 页码：p.19-26,34
- 图表：illus., 1 table, 25 refs.
- 分类号：0600
- issnNo：ISSN1673-5005
- isbnNo：CN37-1441/TE
摘要
Fluid inclusions,C,O,Sr isotope and basin modeling were carried out to analyze the fluid activity episodes and sources of the fluids in Jingshan area of Northern Mid-Yangtze.The results show that there are four to five fluid activity episodes and large scale fluid flow in formation fracture occurred at 150-60 Ma.Formation water salinity estimated by freezing point of the fluid inclusions captured in calcite vein is mainly distributed in 12% to 18%,with high salinity characteristics.Ordovician and Triassic formation δ13C values of calcite veins and wall rock limestone are correspond,while the formation water δ18OSMOW values(5 ‰～12.5 ‰) is significantly higher than that of seawater,which illustrates that diagenetic fluids originated from deeply buried wall rock formation water.δ13C,δ18O values of Permian calcite vein are significantly more negative than that of the surrounding rock,whereas strontium isotope Sr87/Sr86values(0.707 292～0.707 735) are equivalent to that of seawater in the same period,which show that diagenetic fluids originated from Permian formation water affected by organic matter.In the northern margin of Yangtze,fluid activities associated with tectonic compression and uplift at 150-60 Ma are mainly fluid flow within the same layer-based,and mutual-layer flow and influence of surface water infiltration count for little.Petroleum storage conditions did not suffer serious damage.
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