塔里木盆地巴楚隆起岩盐中原生包裹体特征及意义——以巴探5井为例  

The characteristics of primary inclusions in halite in Bachu Uplift of Tarim Basin and their implications for paleo-temperature: A case study of well Bt5

作　　者：席斌斌[1,2] 钱一雄[1,2] 施伟军[1,2] 蒋宏[1,2] 尤东华[1] 王斌[1] 

机构地区：[1]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214151 [2]中国石化油气成藏重点实验室,江苏无锡214151

出　　处：《岩石矿物学杂志》2015年第1期79-86,共8页Acta Petrologica et Mineralogica

基　　金：国家重点基础研究发展计划973项目(2012CB214802);国家科技重大专项项目(2011ZX05005-002;2011ZX05008-003);中国石油化工股份有限公司科技攻关项目(P12009)

摘　　要：塔里木盆地巴楚隆起发育一套中寒武统的膏岩盐层,是较好的区域性盖层。本文对巴楚隆起中段巴探5井蒸发岩层石盐中的包裹体进行了岩相学、显微测温学、热力学计算等研究。岩相学结果表明虽然经历了多期构造以及深埋作用的影响,在石盐中仍然发现了代表表生沉积环境的原生包裹体组合。包裹体的均一温度测温结果表明石盐沉积时的古水温约为29.9℃,与当时的古气候特征相一致。热力学计算表明,石盐中包裹体在埋深过程中所表现出的非等容-非等组成体系的热力学特征,可能是包裹体在后期地质改造过程中得以保存的重要因素之一。The Middle Cambrian gypsum-salt rocks are widely distributed in the Bachu Uplift of the Tarim Basin. These rocks are good regional cap rocks. Fluid inclusion petrography, microthermometry and thermody- namic calculation were used to study the halite samples from well Bt5. According to the analysis of fluid inclusion petrography, the primary fluid inclusion assemblages were preserved during the alteration of tectonic movement and bury process. An average homogenization temperature of 29.9℃ was yielded, which is consistent with the paleo-temperature of surface water. According to the result of thermodynamic calculation, the increasing rate of internal pressure of the fluid inclusions in halite was low during the bury process and it was probably one of the important factors responsible for fluid inclusion preservation.

关 键 词：石盐 包裹体 均一温度 巴楚隆起 

分 类 号：P578.32[天文地球—矿物学]