龙门山南段二叠系热液白云岩特征  

THE CHARACTERISTICS OF PERMIAN HYDROTHERMAL DOLOMITITE OF S SECTION OF LONGMENSHAN MT

作　　者：付于真[1] 王国芝[1,2] 陈园园[3] 王英军[4] 边岩庆[1] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [3]青海油田勘探开发研究院,青海736202 [4]青海油田公司冷湖油田管理处,青海736202

出　　处：《云南地质》2011年第2期229-233,共5页Yunnan Geology

基　　金：自然科学基金项目(41072082);矿物学;岩石学;矿床学国家重点培育学科建设项目(SZD0407)资助

摘　　要：二叠系白云岩与白云质灰岩、灰岩具有渐变过渡关系。白云岩中斑马状构造发育。白云石多为马鞍状白云石或异形白云石,较围岩显示出低碳、低氧和富锶特征,与典型构造热液成因白云岩一致,强度受构造控制明显,从造山带向盆地方向强度逐渐减弱。According to the study,the Permian dolomitite,dolomitic limestone and limestone are in gradual change and transitional relationship.The zebra-like structure is developed in dolomitite.The dolomite is mostly saddle-like or in unusual form.The C,O in dolomite are lower than those in the wall rock;however,Sr higher than that in the later,which is consistent with structural hydrothermal dolomitite.The intensity is controlled evidently by the structure,which is degraded from the orogenetic zone to the basin.

关 键 词：热液白云岩 后期热液改造 外源热流体 二叠系 四川龙门山南段 

分 类 号：P588.245[天文地球—岩石学]