摘要
灵宝盆地位于华北板块南缘与秦岭造山带之间,是豫西北一系列北东-南西向断陷盆地之一。盆地内沉积地层主体为一套厚约2000m陆相碎屑岩夹泥灰岩、薄煤层沉积。本文根据盆地内的恐龙蛋、介形虫、腹足类、哺乳动物化石及少量孢粉等,将地层自下而上划分为下白垩统枣窳组、上白垩统南朝组、古近系古新统-下始新统项城群、中始新统川口组、上始新统庄里坡组及新近系上-中新世(组名暂未定)等6个地层单元。研究表明:下、上白垩统之间及其与项城群之间为不整合或超覆,上-中新统与川口组或庄里坡组为不整合接触,整个地层是一套河流相沉积、局部洪泛洼地或小浅湖相沉积。
Lingbao basin is located between the southern border of South China plate and Qinling orogen, being one of the fault basins in Northwestern Henan. The red beds in the basin are mainly consisted of a series of sedimentary rocks including continental elastic rocks infer bedded will muddy limestones and thin coal seams, with a thickness of ～2000 m. According to the dinosaur eggs, Ostracodes, gastropods, mammalian fossils and pollens occurred in the basin, the red beds can be divided into Lower Cretaceous Zaoyu Formation, Upper Cretaceous, Nanchao Formation, Paleogene paleocene-Lower Eocene Xiangcheng Formation, middle Eocenee, Chuankou Formation Zhuanglipo Formation and Neogene Miocene-Pliocene Formation（unnamed for the time being）from top to bottom. The contacts between Lower Cretaceous and Upper Cretaceous and between Cretaceous and Xiangcheng Formation conformable or stratigraphic ally overlapped. The contacts between Miocene-Pliocene and Chuangkou Formation or Zhuanglipo Formation are unconformable. The whole strata are consisted of a series of fluvial facies and locally flood basin shallow lake sediments.
出处
《资源调查与环境》
2014年第2期114-119,共6页
Resources Survey & Environment
关键词
地层划分-对比
古生物化石
白垩纪
古近纪
断陷盆地
stratigraphic division-correlation
paleontological fossils
Cretaceous
Paleogene
fault basin
