干旱区生态环境知识资源中心(Arid): Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene

Arid

DOI	10.1177/0959683618804627
	Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene
	Forke, Sven 1,2; Rixen, Tim 1,3; Burdanowitz, Nicole 3; Lueckge, Andreas 4; Ramaswamy, Venkitasubramani 5; Munz, Philipp 6; Wilhelms-Dick, Dorothee 7; Vogt, Christoph 2; Kasten, Sabine 2,7,8; Gaye, Birgit 3
通讯作者	Gaye, Birgit
来源期刊	HOLOCENE
ISSN	0959-6836
EISSN	1477-0911
出版年	2019
卷号	29 期号:1 页码:130-144
英文摘要	Laminated sediments of the continental slope off the Makran coast in the northern Arabian Sea are well-known climate archives and record productivity, as well as supply of material from land. Here, we studied sediment core 275KL off Pakistan in concert with sediment trap, dust and river samples in order to characterize and quantify land-derived material deposited in varves and event layers. We analysed grain sizes, mineral assemblages, bulk components and stable isotopes (delta C-13, delta O-18) of carbonates. In winter, enhanced river discharge is the main source of lithogenic matter contributing the major amounts to the total annual sedimentation of the northern Arabian Sea. During the late summer season, lithogenic matter accumulation is slightly enhanced, probably carried along with the south-eastward blowing Levar winds from the Balochistan and the Sistan Basins and the summer monsoon discharge maximum of perennial streams. C/N ratios and stable carbon and oxygen isotopes could not be used to distinguish between organic matter produced on land and in the ocean, whereas stable carbon and oxygen isotope ratios of carbonates suggest that sedimentation of event layers is dominated by direct inputs from land. Catastrophic denudation and storm events occur on average once every 50 years and lead to sedimentation rates that exceed the mean annual sedimentations of 983 g m(-2) yr(-1) by 6 to 10 times. Nevertheless, due to their rare occurrence, they contributed only 7% to the total sedimentation during the last ca. 5000 years. End-member modelling of grain sizes in accordance with lithogenic matter accumulation rates and event layer frequencies showed that arid conditions prevailed between 4000 and 5000 a BP while more humid conditions commenced around 2000 ka BP in accordance with the Pacific ENSO record.
英文关键词	Arabian Sea ENSO erosion grain size Holocene climate laminated sediments lithogenic matter western disturbances
类型	Article
语种	英语
国家	Germany ; India
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000454992800011
WOS关键词	INDIAN WINTER MONSOON ; PARTICULATE ORGANIC-MATTER ; GRAIN-SIZE DISTRIBUTION ; MAKRAN SUBDUCTION ZONE ; CENTRAL-SOUTHWEST ASIA ; OXYGEN MINIMUM ZONE ; LATE QUATERNARY ; ISOTOPIC COMPOSITION ; SURFACE TEMPERATURE ; CONTINENTAL-MARGIN
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216124
作者单位	1.Leibniz Ctr Trop Marine Res, Dept Biogeochem & Geol, Bremen, Germany; 2.Univ Bremen, Fac Geosci, Bremen, Germany; 3.Univ Hamburg, Inst Geol, Bundesstr 55, D-20146 Hamburg, Germany; 4.BGR, Hannover, Germany; 5.Natl Inst Oceanog, Geol Div, Panaji, India; 6.Univ Tubingen, Senckenberg Ctr Human Evolut & Palaeoenvironm HEP, Tubingen, Germany; 7.Alfred Wegener Inst Helmholtz Ctr Polar & Marine, Bremerhaven, Germany; 8.Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany
推荐引用方式 GB/T 7714	Forke, Sven,Rixen, Tim,Burdanowitz, Nicole,et al. Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene[J],2019,29(1):130-144.
APA	Forke, Sven.,Rixen, Tim.,Burdanowitz, Nicole.,Lueckge, Andreas.,Ramaswamy, Venkitasubramani.,...&Gaye, Birgit.(2019).Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene.HOLOCENE,29(1),130-144.
MLA	Forke, Sven,et al."Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene".HOLOCENE 29.1(2019):130-144.