Rare earth element geochemistry in the inner shelf of the East China Sea and its implication to sediment provenances

Xu, Fu-Liu; Li, Anchun; Li, Tiegang; Xu, Kehui; Chen, Shiyue; Qiu, Longwei; Cao, Yingchang

doi:10.1016/s1002-0721(10)60526-1

Cited by 46 publications

(19 citation statements)

References 15 publications

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“…Marine sediments that have accumulated along ocean margins, where the lithogenous sediment fraction dominates the bulk sediment composition, commonly exhibit REE curves that represent the composition of their terrigenous source rocks [27,[70][71][72][73]. Modeling and leaching analyses of Quaternary pelagic sediments from the central Pacific Ocean reveal that the siliciclastic fraction of these sediments similarly has a flat WSA-normalized curve [14].…”

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

“…The relationship between the REE composition of sediments and their terrigenous sources is further recorded by the sediments that are accumulating under the strongly negative redox condition of the Black Sea [65]. Two major terrigenous sources of significantly different composition were identified initially by the clay mineralogy of the surface sediments [74]. In the northern region of the basin, the fine fraction of the sediments is dominated by illite.…”

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

“…In the southern region, the clay fraction is enriched in montmorillonite (smectite) that is derived largely from Anatolia. The major-element composition of the suspended phases in streams draining the two regions [74,75] further defines differences in the elemental composition of the two source regions.…”

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

“…Surface sediments recovered in box cores from the western basin margin have a flat REE curve that is representative of the largely felsic rocks of eastern Europe, whereas surface sediments from the southern basin margin have a light REE depletion that reflects a moderate mafic-rock contribution from the ultramafic rocks of the Pontic Mountains in northern Anatolia. Although the dominant sediment source currently is the river input from eastern Europe [74], the Anatolia source can be appreciated when it is realized that the Pontic Mountains rise sharply from a narrow 5 to 10 km wide coastal plain to an elevation of ca 3950 m. The coastal plain gives way seaward to an equally narrow basin shelf and slope, the latter traversed by numerous submarine canyons that occur along the full extent of the Anatolia slope [76]. This system of canyons likely delivers much of the sediment from the Pontic Mountains to the abyssal plain by by-passing the shelf and slope, possibly more so in the past than presently.…”

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

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Normalized Rare Earth Elements in Water, Sediments, and Wine: Identifying Sources and Environmental Redox Conditions

Piper¹,

Bau²

2013

AJAC

151

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The concentrations of the rare earth elements (REE) in surface waters and sediments, when normalized on an elementby-element basis to one of several rock standards and plotted versus atomic number, yield curves that reveal their partitioning between different sediment fractions and the sources of those fractions, for example, between terrestrial-derived lithogenous debris and seawater-derived biogenous detritus and hydrogenous metal oxides. The REE of ancient sediments support their partitioning into these same fractions and further contribute to the identification of the redox geochemistry of the sea water in which the sediments accumulated. The normalized curves of the REE that have been examined in several South American wine varietals can be interpreted to reflect the lithology of the bedrock on which the vines may have been grown, suggesting limited fractionation during soil development.

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Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

Section: Lithogenous Sediment Fractionmentioning

confidence: 99%

See 2 more Smart Citations

Normalized Rare Earth Elements in Water, Sediments, and Wine: Identifying Sources and Environmental Redox Conditions

Piper¹,

Bau²

2013

AJAC

151

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“…The coherent and predictable behavior of REEs, along with their sensitivity to pH, redox conditions, and their tendency to participate in adsorption/ desorption reactions, allows them to be used for the interpretation of diagenetic redox conditions in palaeoenvironmental research (Shields and Stille, 2001), discriminating sediment provenance and evolution (Grousset et al,1998;Xu et al, 2011Xu et al, , 2012, and elucidating seawater circulation patterns (Tachikawa et al, 1999), hydrothermal fluxes (German et al, 1999), and the historic oxygenation of the oceans (Henderson, 1984;Murray et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Rare earth elements in surface sediments of a marine coast under heavy anthropogenic influence: The Bohai Bay, China

Zhang

Gao

2015

Estuarine, Coastal and Shelf Science

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a b s t r a c tSurface sediments along four river-to-sea transects from the coastal Bohai Bay were assessed using a four-step sequential extraction procedure to determine the concentrations of rare earth elements (REEs) and the geochemical fractions in which those elements were present. The concentrations of light REEs were slightly depleted than those of the middle REEs and the heavy REEs. No significant Ce anomaly was observed whereas slight Eu-positive anomaly was found. The sequential extraction results revealed that the geochemical fractions of REEs followed the order of residual > reducible > oxidizable > acid soluble. The residual fraction accounted for the majority of the total concentrations of REEs. Middle REEs were more easily leached than other REEs. No obvious river-to-sea transportation was observed and the concentrations of REEs in surface sediments of the coastal Bohai Sea were consistent with the data from the Post-Archean Australian Shale. This study further demonstrated on the basis of our previous inference that the geochemical features of REEs in coastal sediments were generally unaffected by heavy anthropogenic effects.

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Palaeoenvironments and elemental geochemistry across the marine Permo‐Triassic boundary section, Guryul Ravine (Kashmir, India) and a comparison with other North Indian passive margin sections

Brookfield

Stebbins

Williams

et al. 2019

The Depositional Record

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The Guryul Permian-Triassic sediments were deposited on a passive margin in a partially enclosed basin, at a latitude of about 45°S along the southern margin of the Neotethys Ocean. The closest modern analogy is the Japan Sea rotated into a southern hemisphere orientation. Guryul element variations are subdued, mostly lithological, and take place across the change from the dominantly sandy shallow-water Permian Zewan Formation into the dominantly shaly deeper-water latest Permian-Triassic Khunamuh Formation, and not at the palaeontological Permian-Triassic boundary.The overall geochemistry of the Guryul sediments is very similar to that of the Ulleung Basin in the Japan Sea, where the sediments are 40%-60% eolian from loess and redeposited loess in the North China Basin. The overall Guryul geochemistry indicates that the sediments were derived from dominantly silica-rich continental rather than silica-poor sources although with some more silica-poor inputs at times. Element ratios suggest increasing aridity and wind abrasion across the Permian-Triassic boundary. Various geochemical redox proxies suggest mainly oxic depositional conditions, with episodes of anoxia, but with little systematic variation across the extinction boundary. Productivity proxies suggest a slight decrease across the Permian-Triassic boundary, and at least one more decreased interval in the Early Triassic. The similar geochemistry of other localities indicate that the Guryul geochemical changes are regional in extent and representative of the North Indian Permian-Triassic passive margin. The lack of consistent element geochemical changes across the boundary accompanied by significant C, S, and other isotopic changes suggests that atmospheric and oceanic chemistry rather than physical changes, such as provenance, climate and sea-level changes, drove the Permian-Triassic environmental changes and extinctions at least on the mid-latitude Tethyan shelf of northern India. K E Y W O R D S Extinction, geochemistry, Kashmir, Permian-Triassic 76 | BROOKFIELD Et aL. F I G U R E 1 Late Permian palaeogeography (courtesy of Chris Scotese): Early Triassic "dead zone" from Sun et al. (2012); Winds from Kiehl and Shields (2005). Locations of cited Permo-Triassic boundary section in open circles with names in bold face 78 | BROOKFIELD Et aL. F I G U R E 8 Biostratigraphy of the Guryul Permian-Triassic boundary section showing stratigraphic range of fossils and number of species in each subdivision (data from Nakazawa et al., 1975). Bryo -bryozoans. Gastr -gastropods. Note that there is little extinction at the Zewan-Khunamuh Formation boundary and the main extinction (and new species appearance) is at the FAD of Hindeodus parvus, and the first inferred anoxic level marked by pyrite framboids.

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Rare earth element geochemistry in the inner shelf of the East China Sea and its implication to sediment provenances

Cited by 46 publications

References 15 publications

Normalized Rare Earth Elements in Water, Sediments, and Wine: Identifying Sources and Environmental Redox Conditions

Normalized Rare Earth Elements in Water, Sediments, and Wine: Identifying Sources and Environmental Redox Conditions

Rare earth elements in surface sediments of a marine coast under heavy anthropogenic influence: The Bohai Bay, China

Palaeoenvironments and elemental geochemistry across the marine Permo‐Triassic boundary section, Guryul Ravine (Kashmir, India) and a comparison with other North Indian passive margin sections

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