塔里木盆地轮台断隆第三系盐湖沉积环境研究  

Saline Lake Sedimentary Environments of Tertiary in Luntai Fracture uplift,Tarim Basin

作　　者：徐天光 顾家裕[1,2] 薛叔浩 

机构地区：[1]青海石油管理局勘探开发研究院 [2]石油勘探开发科学研究院

出　　处：《沉积学报》1998年第3期137-140,共4页Acta Sedimentologica Sinica

摘　　要：详细研究了塔里木盆地塔北隆起轮台断隆第三系盐湖—碎屑岩沉积体系的沉积环境。整个研究以干旱—半干旱的气候条件为主因素，以盐湖沉积中盐类矿物硬石膏的不同构造类型与环境关系为突破口，结合元素地球化学，从一个新的角度总结了研究区的沉积特征。Sedimentary environments of Tertiary saline lake and clastic depositional system in Luntai fracture uplift of Tabei uplift,Tarim basin are studied in detail.In the study area,the depositional patterns were dominated by arid and semi arid climate.Two suits of reservoir and seal,respectively Suweiyi Fm.of Paleogene and Jidik Fm.of Neogene developed in such conditions,so that their sedimentary and reservoir characteristics had close correlation with the saline deposits,especially the widely distributed anhydrite in this area.Anhydrite was classified into ten sorts according to its occurrence.The sedimentary characteristics are summarized in this paper based on the relationship between different structures in anhydrite and environments as the breakthrough point,simultaneously combined with element geochemistry.Five kinds of sedimentary facies were recognized as alluvial fan,sandsheet,ephemeral saline lake,perennial saline lake,ephemeral river and flooded plain,among which the key reservoir sandsheet was subdivided into common,finesorted and gypsificated ones.In conclusion,the author summarized the depositional model of Suweiyi Fm.

关 键 词：盐湖 沉积环境 硬石膏 第三系 塔里木盆地 

分 类 号：P534.61[天文地球—古生物学与地层学] P512.3[天文地球—地质学]