首页 | 本学科首页   官方微博 | 高级检索  
     

兰州-民和盆地河口群层序地层格架特征及盆地演化
引用本文:李麒麟, 颉贵琴, 周玲琦, 王云斌. 兰州-民和盆地河口群层序地层格架特征及盆地演化[J]. 沉积与特提斯地质, 2002, 22(4): 73-78.
作者姓名:李麒麟  颉贵琴  周玲琦  王云斌
作者单位:甘肃省地质勘探局 第三地质矿产勘查院,甘肃 兰州 730050
摘    要:兰州-民和盆地河口群形成于早白垩世,其间充填了巨厚的陆源碎屑物,碎屑物的组合内容和方式反映了冲积扇相、扇三角洲相、湖泊相沉积体系占主导。盆地地层层序具有退积型、加积型、进积型叠置的变化旋回,显示了全韵律的特点,代表了构造旋回幕的产物。根据盆地的发展演化特征和层序界面的确定,初步建立了盆地的层序地层格架,同时阐述了盆地的演化过程。

关 键 词:兰州-民和盆地  下白垩统  河口群  层序地层  盆地演化
文章编号:1009-3850(2002)04-0073-06
收稿时间:2002-01-16
修稿时间:2002-01-16

Sequence stratigraphic framework of the Hekou Group and evolution of the Lanzhou-Minhe Basin
LI Qi-lin, XIE Gui-qin, ZHOU Ling-qi, WANG Yun-bin. Sequence stratigraphic framework of the Hekou Group and evolution of the Lanzhou-Minhe Basin[J]. Sedimentary Geology and Tethyan Geology, 2002, 22(4): 73-78.
Authors:LI Qi-lin  XIE Gui-qin  ZHOU Ling-qi  WANG Yun-bin
Affiliation:Gansu Bureau of Geology and Mineral Resources,Lanzhou 730050,Gansu,China
Abstract:The Hekou Group in the Lanzhou-Minhe Basin formed during the Early Cretaceous consists primarily of the tremendous terrigenous clastics composed of alluvial fan, fan-delta and lacustrine depositional systems. The stratigraphic sequences in the basin are involved in the retrogradational, aggradational and progradational cycles that represent the tectonic cyclic episodic products. The sequence stratigraphic framework of the Hekou Group is made up, on the basis of sequence features and lithofacies changes, of the lake transgressive (LTST), lake flooding (LFST) and lake regressive (LRST) systems tracts. The basin went, by and large, through the initial rifting and subsiding during the Jurassic, spreading and expansion during the middle Early Cretaceous, and collapse during the late Early Cretaceous.
Keywords:Lanzhou-Minhe Basin  Lower Cretaceous  Hekou Group  sequence stratigraphy  basin evolution
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《沉积与特提斯地质》浏览原始摘要信息
点击此处可从《沉积与特提斯地质》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号