Evolution model of a modern delta fed by a seasonal river in Daihai Lake, North China: determined from ground-penetrating radar and trenches

doi:10.1007/s11707-018-0740-x

	Evolution model of a modern delta fed by a seasonal river in Daihai Lake, North China: determined from ground-penetrating radar and trenches
	Liu, Beibei 1; Tan, Chengpeng 2,3; Yu, Xinghe 4; Shan, Xin 3; Li, Shunli 4
刊名	FRONTIERS OF EARTH SCIENCE
	2019-06
卷号	13 期号:2 页码:262-276
关键词	delta evolution seasonal discharge ground-penetrating radar sedimentary architecture Daihai Lake
ISSN号	2095-0195
DOI	10.1007/s11707-018-0740-x
英文摘要	While deltas fed by seasonal rivers are common in modern sedimentary environments, their characteristics remain unclear as compared to those fed by perennial rivers. This study identifies a small delta discharged by a seasonal stream flowing into Daihai Lake, in northern China, which is driven by ephemeral and high-energy flood events. Detailed 3D facies architecture was analyzed using ground-penetrating radar (GPR) and sedimentary logs from outcrop and trenches. Four types of radar surfaces, including truncations of underlying inclined strata, weak reflections, and depositional surface of downlap and onlap, were identified. Six radar facies (high-angle oblique-tangential, low-angle subparallel, gently plane parallel, plane-parallel, chaotic, and continuous strong reflection) were identified based on distinctive reflections, including amplitude, continuity, dip, and termination patterns. Five depositional units (Unit A to E) were documented from proximal to distal delta. Seasonal discharge signatures include significant grain-size decrease over short distance, abundant Froude supercritical flow sedimentary structures, poorly developed barforms, and small-scale scour and fill structures. Records of lake-level and sediment budget were evaluated over the past 60 years. In highstand stage (1960-1980), amalgamated channel (Units A and B), and delta front (Unit C) were deposited. In slope stage (1980-1996), the lower deposits (Units A, B, C) were eroded by Unit D with a distinct truncation surface. In lowstand stage, most eroded sediments bypassed the incised channel and accumulated in the distal part, in which a new depositional unit was formed (Unit E). The model demonstrates that deltas fed by seasonal rivers tend to accumulate large amounts of sediments carried by high magnitude floods within short periods.
资助项目	opening foundation of the Key Laboratory of Marine Sedimentology & Environmental Geology, SOA[MASEG201706]
WOS关键词	SOFT-SEDIMENT DEFORMATION ; STAGE PLANE BEDS ; FLUVIAL SYSTEMS ; CYCLIC STEPS ; RESERVOIR ARCHITECTURE ; FACIES ARCHITECTURE ; SUPERCRITICAL FLOWS ; FERRON SANDSTONE ; LACUSTRINE DELTA ; BRAID BAR
WOS研究方向	Geology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000468328700002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24707]
专题	自然资源部第一海洋研究所
通讯作者	Tan, Chengpeng
作者单位	1.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China 2.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Sichuan, Peoples R China 3.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China 4.China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Liu, Beibei,Tan, Chengpeng,Yu, Xinghe,et al. Evolution model of a modern delta fed by a seasonal river in Daihai Lake, North China: determined from ground-penetrating radar and trenches[J]. FRONTIERS OF EARTH SCIENCE,2019,13(2):262-276.
APA	Liu, Beibei,Tan, Chengpeng,Yu, Xinghe,Shan, Xin,&Li, Shunli.(2019).Evolution model of a modern delta fed by a seasonal river in Daihai Lake, North China: determined from ground-penetrating radar and trenches.FRONTIERS OF EARTH SCIENCE,13(2),262-276.
MLA	Liu, Beibei,et al."Evolution model of a modern delta fed by a seasonal river in Daihai Lake, North China: determined from ground-penetrating radar and trenches".FRONTIERS OF EARTH SCIENCE 13.2(2019):262-276.