Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31578.1 |
Can climatic signals be discerned in a deep-water sink?: An answer from the Pearl River source-to-sink sediment-routing system | |
Gong, Chenglin1,2,3; Blum, Michael D.4; Wang, Yingmin1,5; Lin, Changsong6; Xu, Qiang7 | |
2018-03-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2018 |
卷号 | 130页码:661-677 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Using integrated two- and three-dimensional seismic and shallow borehole data from the Pearl River source-to-sink system, this study demonstrates that submarine fan deposition records climatic signals of Asian monsoons and the mid-Pleistocene climate transition, but with a lag time of 100 k.y., providing new tools to predict the past climate and important insights in source-to-sink context. Specifically, cooler and drier climates during weakened monsoons from marine oxygen isotope stages (MIS) 20 to 12 (814-478 ka), with reduced global ice volumes, led to decreased overall sediment supply and reduced amplitudes of sea-level change, which, in turn, decreased cross-shelf transit distances and gave rise to much sandier prograding intraslope fans. Warmer and wetter strengthened monsoons from MIS 12 to 1 (478 ka to recent), with larger global ice volumes and corresponding amplitudes of sea-level change, in contrast, led to increased overall sediment supply but served to increase cross-shelf transit distances, resulting in much muddier retrograding intraslope fans. Climatic changes in source areas, coupled with global climate and sea-level changes, therefore modulated the lithological characteristics of terminal sinks in the Pearl River source-to-sink system. High-frequency (43 k.y.) and low-amplitude sea-level changes (mean value of sea level = -55.8 m, with the standard deviation of +/- 24.2 m) during the mid-Pleistocene climate transition caused shorelines to more frequently reside proximal enough to the shelf edge to deliver coarse sediments to deep-water areas, leading to higher sediment delivery rates (R-s) of 5-15 km/m.y. and larger prograding intraslope submarine fans. Lower-frequency (100 k.y.) and high-eramplitude sea-level fluctuations (mean value of sea level = -62.7 m, with the standard deviation of +/- 33.2 m) after the mid-Pleistocene climate transition, in contrast, prevented shorelines from staying close enough to the shelf edge to continuously deliver coarse sediments to deep water, resulting in lower Rs of 4-8 km/m.y. and smaller retrograding intraslope submarine fans. Climatically controlled eustatic fluctuations, thus, determined sediment delivery rates and volumes of the terminus of source-to-sink systems. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427362500017 |
WOS关键词 | SOUTH CHINA SEA ; EAST-ASIAN MONSOON ; FLUVIAL SEDIMENT ; LEVEL CHANGE ; MOUTH BASIN ; BENGAL FAN ; TRANSITION ; EVOLUTION ; SHELF ; MA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24583 |
专题 | 地球科学 |
作者单位 | 1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China; 2.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China; 3.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA; 4.Univ Kansas, Dept Geol, Lawrence, KS 66045 USA; 5.Zhejiang Univ, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China; 6.China Univ Geosci, Sch Ocean Sci, Beijing 100083, Peoples R China; 7.CNOOC, Res Ctr, Beijing 100027, Peoples R China |
推荐引用方式 GB/T 7714 | Gong, Chenglin,Blum, Michael D.,Wang, Yingmin,et al. Can climatic signals be discerned in a deep-water sink?: An answer from the Pearl River source-to-sink sediment-routing system[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2018,130:661-677. |
APA | Gong, Chenglin,Blum, Michael D.,Wang, Yingmin,Lin, Changsong,&Xu, Qiang.(2018).Can climatic signals be discerned in a deep-water sink?: An answer from the Pearl River source-to-sink sediment-routing system.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,130,661-677. |
MLA | Gong, Chenglin,et al."Can climatic signals be discerned in a deep-water sink?: An answer from the Pearl River source-to-sink sediment-routing system".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 130(2018):661-677. |
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