塔中地区早奥陶世沉积特征及沉积演化分析  

Analysis of momentary Characteristics and Evolution of Early Ordovician in Central Tarim Area.

作　　者：刘胜[1] 杨海军[1] 李新生 李宇平[1] 杨栓荣 王振宇 陈景山[2] 马青[2] 谭秀成[2] 

机构地区：[1]塔里木石油勘探开发指挥部,新疆库尔勒841000 [2]西南石油学院,四川南充637001

出　　处：《新疆石油地质》2000年第1期54-57,共4页Xinjiang Petroleum Geology

摘　　要：塔里木盆地中部在早奥陶世属被极浅水覆盖的克拉通地区，以发育大量的潮间带、潮上带和潮下带沉积物为特征，岩性为各类白云岩、灰岩及它们之间的过渡类型。发育沉积水体的多旋回的向上变浅序列，是潮坪向海进积作用和台地碳酸盐沉积对海平面变化的响应。其早奥陶世的沉积演化分为两个阶段，早奥陶世早期塔中地区具有广阔的碳酸盐台地沉积范围，早奥陶世中、晚期，塔中Ⅰ号断层东侧的台地发生断陷、沉没，发育断阶式跌积型陡斜坡，台地范围退缩。In early Ordovician, central Tarim basin, belonging to cratonic area covered by extremelyshallow water, was characterized by well developed deposits of intertidal zone, supratidal zone and subtidalzone with all kinds of dolomites, limestones and their transitional rocks types. The multicycle and upwardshallowing sequences that developed sedimentary waters were responses of tidal flat progradation toward seaand tableland carbonate deposition changes with sea level. Sedimentary evolution of early Ordoyician canbe divided into two stages, i.e. at early stage of Early Ordovician, a vast dePOsit of tableland carbonate occurred in Central Tarim area; at middle and late stage of Early Ordovician, deep rift-subsidence and submergence along with fault-bench precipitate steep slope were developed over tableland in east side of Central Tarim fault No.l, resulting in degradation and recession of tableland area.

关 键 词：塔里木盆地 早奥陶世 沉积特征 沉积演化 油气田 

分 类 号：P618.130.2[天文地球—矿床学] P512.2[天文地球—地质学]