柴达木盆地路乐河组粗碎屑沉积成因与青藏高原隆升时限  

Sedimentary Genetic Types of Coarse Fragment of Paleogene Lulehe Formation in Qaidam Basin and Time Limit of the Tibetan Plateau Uplift

作　　者：付玲[1] 关平[1] 简星[1] 刘瑞娟[1] 冯帆[1] 安群 范朝峰 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中国石油测井公司青海事业部,甘肃敦煌736202 [3]中国石油青海油田勘探处,甘肃敦煌736202

出　　处：《天然气地球科学》2012年第5期833-840,共8页Natural Gas Geoscience

摘　　要：通过调研野外剖面、钻井岩心、测井及地震等资料,结合分析测试,对古近系路乐河组进行了岩石学、沉积相和测井相方面的综合研究,认为柴达木盆地路乐河组具有显著的山前近源粗碎屑沉积特征,主要发育氧化环境下的典型冲积扇,并往往与下伏中生代地层或古生代基岩呈角度不整合接触,这些沉积特征记录了在白垩纪与新近纪之交柴达木盆地经历的由印度—欧亚板块碰撞而引起的大范围强烈的构造运动。In this study,rock assemblage were interpreted credibly in various aspects,including lithological association,sedimentary facies,well logging and geophysical prospecting,on the basis of outcrops,core drilling and seismic data.The results of Paleogene study in Qaidam basin indicate that the coarse clastic sediments in the lower segment of Lulehe Formation have a nearby source and make typical alluvial fans under the oxidation environment.The Mesozoic strata or Paleozoic rocks are defined by an angular unconformity which is overlain by the segment of Lulehe Formation.Basin comprehensive analysis shows Qaidam basin experienced a large-scale intense tectonic movement at the turn of the Cretaceous and the Paleogene.And the sediment records of Lulehe Formation is the response of the collision between India and Eurasian plates.

关 键 词：路乐河组 粗碎屑沉积 沉积相 青藏高原隆升 柴达木盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]