干旱区生态环境知识资源中心(Arid): Element enrichment and provenance of the detrital component in Holocene sediments from the western Black Sea

Arid

DOI	10.1016/j.oceano.2019.10.001
	Element enrichment and provenance of the detrital component in Holocene sediments from the western Black Sea
	Dekov, Vesselin M.1,2; Darakchieva, Valentina Y.3; Billstrom, Kjell 4; Garbe-Schonberg, C. Dieter 5; Kamenov, George D.6; Gallinari, Morgane 7; Dimitrov, Lyubomir 8; Ragueneau, Olivier 7; Kooijman, Ellen 4
通讯作者	Dekov, Vesselin M.
来源期刊	OCEANOLOGIA
ISSN	0078-3234
EISSN	2300-7370
出版年	2020
卷号	62 期号:2 页码:139-163
英文摘要	Concentrations of a large set of major and trace elements, and Sr, Nd and Pb isotope ratios were measured in Holocene sediments cored in the western deep Black Sea in order to unravel: (1) the controls of element enrichment, and (2) sources of the detrital component. The transition of the basin from oxic to euxinic resulted in enrichment or depletion in a number of elements in the deep-sea sediments. Authigenic Fe enrichment appears to depend on the amount of Fe mobilized from the sediment through the benthic redox shuttle mechanism and amount of Fe mobilized from the sediment through the benthic redox shuttle mechanism and free H2S in the water column (degree of euxinization). Manganese enrichment is controlled by diagenetic reactions within the sediment: the dissolution of Mn minerals, Mn2+ diffusion upward and reprecipitation. Barium enrichment is also controlled by diagenetic reactions, sulfate reduction and methanogenesis, that take place above and below the sulfate-methane transition, respectively. The major part of V, Co, Ni, Cu, Zn, Cr, Mo, Cd and Sb is inferred to have co-precipitated with Fe in the euxinic deep waters and to have been incorporated into authigenic Fe-sulfides. Basin reservoir effect additionally influences the Mo enrichment. The U enrichment is interpreted to have a different origin in the two organic-rich stratigraphic units (II and I). It is inferred to be: (i) at the expense of the U inventory of the deepwater pool and a result of inorganic reduction of U at euxinic conditions in the lower Unit II; and (ii) at the expense of the U inventory of the surface water pool and a result of biogenic uptake and transfer to the sediment by the plankton in the upper Unit I. The high field strength elements are closely linked to the detrital component and their depletion in the organic-rich sediments reflects a dilution of the detrital component by the biogenic one. The enrichments of REE, Sn and Th are likely controlled by adsorption on clay minerals. Sr-Nd-Pb isotope compositions of the alumino-silicate component of the studied sediments are relatively uniform. They are most likely controlled by riverine suspended matter supplied mainly in the NW Black Sea (Danube Delta) and transported southward by marine currents, and to a lesser degree by suspended matter from the small rivers draining SE Bulgaria and NW Turkey. Wind-blown dust from the Sahara Desert appears to have a minor contribution to the alumino-silicate component of the sediments. The slight shift in the Pb isotopes in Unit I upper layers is possibly caused by the addition of anthropogenic Pb. (C) 2020 Institute of Oceanology of the Polish Academy of Sciences. Production and hosting by Elsevier B.V.
英文关键词	Anoxic Black Sea Element enrichment Sr-Nd-Pb-isotopes Holocene
类型	Article
语种	英语
国家	Japan ; France ; Bulgaria ; Sweden ; Germany ; USA
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000528728600003
WOS关键词	RARE-EARTH-ELEMENTS ; MARINE-SEDIMENTS ; TRACE-METALS ; ISOTOPE GEOCHEMISTRY ; CARBON ACCUMULATION ; SOUTH CARPATHIANS ; BIOGENIC SILICA ; ORGANIC-CARBON ; REACTIVE IRON ; SR
WOS类目	Oceanography
WOS研究方向	Oceanography
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318904
作者单位	1.Tokyo Univ Marine Sci & Technol, Minato Ku, 4-5-7 Konan, Tokyo 1088477, Japan; 2.IFREMER, Dept Marine Geosci, F-29280 Plouzane, France; 3.Bulgarian Acad Sci, Inst Mineral & Crystallog, Sofia, Bulgaria; 4.Swedish Museum Nat Hist, Dept Geosci, Stockholm, Sweden; 5.Univ Kiel, Inst Geosci, Marine Climate Res, Kiel, Germany; 6.Univ Florida, Dept Geol Sci, Gainesville, FL USA; 7.European Inst Marine Studies, UMR CNRS UBO LEMAR 6539, Technopole Brest Iroise, Plouzane, France; 8.Bulgarian Acad Sci, Inst Oceanol, Varna, Bulgaria
推荐引用方式 GB/T 7714	Dekov, Vesselin M.,Darakchieva, Valentina Y.,Billstrom, Kjell,et al. Element enrichment and provenance of the detrital component in Holocene sediments from the western Black Sea[J]. French National Research Institute for Sustainable Development,2020,62(2):139-163.
APA	Dekov, Vesselin M..,Darakchieva, Valentina Y..,Billstrom, Kjell.,Garbe-Schonberg, C. Dieter.,Kamenov, George D..,...&Kooijman, Ellen.(2020).Element enrichment and provenance of the detrital component in Holocene sediments from the western Black Sea.OCEANOLOGIA,62(2),139-163.
MLA	Dekov, Vesselin M.,et al."Element enrichment and provenance of the detrital component in Holocene sediments from the western Black Sea".OCEANOLOGIA 62.2(2020):139-163.