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.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2012年第5期833-840,共8页
Natural Gas Geoscience
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
Paleogene Lulehe Formation
Coarse clastic rocks
Sedimentary facies
Uplift of the Tibetan Plateau
Qaidam basin
