Preliminary analysis of the depositional environments of the Lower Cretaceous Yixian Formation in the Sihetun area, western Liaoning, China

doi:10.1016/j.cretres.2006.05.010

	Preliminary analysis of the depositional environments of the Lower Cretaceous Yixian Formation in the Sihetun area, western Liaoning, China
	Jiang, Baoyu ; Sha, Jingeng
刊名	CRETACEOUS RESEARCH
	2007-04-01
卷号	28 期号:2 页码:183-193
关键词	depositional environments Lower Cretaceous Yixian Formation western Liaoning China
ISSN号	0195-6671
DOI	10.1016/j.cretres.2006.05.010
文献子类	Article
英文摘要	The Lower Cretaceous Yixian Formation in the Sihetun area consists of, in ascending order, the Lujiatun, Lower Lava, Jianshangou and Upper Lava units. Twelve lithofacies are recognized within the sedimentary Lujiatun and Jianshangou units. These form two facies associations: a volcaniclastic apron association in the Lujiatun Unit and a lake association in the Jianshangou Unit. The former is distributed in a linear belt along the northern margin of the depositional basin, and is composed of debris flow, hyper-concentrated flood-flow, stream-flood, sheet-flood and lahar deposits. It can be further subdivided into syneruption and inter-eruption assemblages. The syneruption assemblage is composed of debris flow, hyper-concentrated flood-flow and lahar deposits, whereas the inter-eruption assemblage consists of stream-flood and sheet-flood deposits. Well-developed clast imbrications of clast-supported conglomerates indicate that the ancient flow direction of the volcaniclastic apron was from east to west and south (170-310 degrees) along the margin of the depositional basin. The lake association is widely distributed in the middle and southern part of the basin and composed of wave activity, suspension, hyper-concentrated and concentrated density flow and turbidity-cuffent deposits. It includes three assemblages: a beach-nearshore assemblage distributed in a linear belt along the western margin of the lake deposits, and made up of wave activity, hyper-concentrated density flow, suspension and turbidity current deposits; a lake floor assemblage composed of suspension, hyper-concentrated density flow and turbidity-current deposits; a fan delta assemblage distributed along the eastern margin of the lake deposits, consisting of alternating hyper-concentrated and concentrated density flow with turbidity-current deposits. (C) 2006 Elsevier Ltd. All rights reserved.
WOS关键词	LAKE ; SEDIMENTATION ; OREGON ; BEDS ; AGE
WOS研究方向	Geology ; Paleontology
语种	英语
出版者	ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
WOS记录号	WOS:000246762700005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/67294]
专题	中国科学院地质与地球物理研究所
通讯作者	Jiang, Baoyu
作者单位	1.Nanjing Univ, Dept Earth Sci, Nanjing 210093, Jiangsu, Peoples R China 2.Acad Sinica, Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Baoyu,Sha, Jingeng. Preliminary analysis of the depositional environments of the Lower Cretaceous Yixian Formation in the Sihetun area, western Liaoning, China[J]. CRETACEOUS RESEARCH,2007,28(2):183-193.
APA	Jiang, Baoyu,&Sha, Jingeng.(2007).Preliminary analysis of the depositional environments of the Lower Cretaceous Yixian Formation in the Sihetun area, western Liaoning, China.CRETACEOUS RESEARCH,28(2),183-193.
MLA	Jiang, Baoyu,et al."Preliminary analysis of the depositional environments of the Lower Cretaceous Yixian Formation in the Sihetun area, western Liaoning, China".CRETACEOUS RESEARCH 28.2(2007):183-193.