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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。
Through the investigation of the profile, drilling core, well logging and seismic data, combined with the analysis and testing, a comprehensive study on the lithology, sedimentary facies and logging facies of the Lulehe Formation in Paleogene was conducted. Hexi Formation has significant sedimentary features of near-source coarse-grained sediments, and mainly develops typical alluvial fans in oxidizing environments and is often angularly unconformity with underlying Mesozoic strata or Paleozoic bedrock. These sedimentary features record the Cretaceous At the turn of the Neo-Cenozoic, a large-scale and intense tectonic movement caused by the collision of the Indo-Eurasian plate with the Qaidam basin experienced.