Island weathering: river sources of rare earth elements to the Western Pacific Ocean

Sholkovitz, Edward R.; Elderfield, Henry; Szymczak, Ron; Casey, Kimberly A.

doi:10.1016/s0304-4203(99)00064-x

Cited by 180 publications

(113 citation statements)

References 30 publications

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“…The MREE enrichment has been also recorded for modern estuaries (such as the Papua New Guinea, Fly, and Sepik) ( Fig. 3F; Elderfield et al, 1990;Sholkovitz et al, 1999). For the LREEenriched patterns, an alternative explanation is the incorporation of riverine Fe-colloids (within carbonates) that contained preferentially scavenged LREE from a nearby riverine input source (Nothdurft et al, 2004).…”

Section: Freshwater and Brackish Watermentioning

confidence: 82%

“…Estuarine waters would show slight LREE-depleted patterns in the low salinity region of estuaries as a result of preferential scavenging of LREE by adsorption onto particulates and colloids (Sholkovitz, 1992). Preferential release of MREE from colloidal matter is required for MREE-enriched patterns in estuarine environment (Sholkovitz et al, 1999). The MREE enrichment has been also recorded for modern estuaries (such as the Papua New Guinea, Fly, and Sepik) ( Fig.…”

Section: Freshwater and Brackish Watermentioning

confidence: 89%

“…PAAS-normalized REE + Y patterns of the Doushantuo cap carbonates at the Jiulongwan section. The Group-A, -C, and -E carbonates have slight MREE enrichment, similar to estuarine water (Papua New Guinea River) and lacustrine carbonates (Jeerinah Formation) (data from Sholkovitz et al, 1999;Bolhar and Van Kranendonk, 2007), but different from open seawater (South Pacific) and typical marine carbonates (Warrawoona Group) (data from Zhang and Nozaki, 1996;Van Kranendonk et al, 2003 …”

Section: Carbonates From the Lithofacies C2mentioning

confidence: 93%

“…Hydrothermal fluids display very different REE + Y distributions, which have much distinct Eu enrichment in otherwise smooth, LREEenriched patterns (Michard et al, 1983). In contrast, riverine REE + Y patterns are diverse, displaying slight LREE depletion or enrichment, or MREE enrichment, with no conspicuous elemental anomalies (Sholkovitz et al, 1999;. These patterns have been identified from lacustrine and estuarine carbonates (e.g.…”

Section: Implications For Sedimentary Environmentmentioning

confidence: 99%

See 3 more Smart Citations

Geochemical constraints on the origin of Doushantuo cap carbonates in the Yangtze Gorges area, South China

Wang

Lin

Chen

2014

Sedimentary Geology

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Section: Freshwater and Brackish Watermentioning

confidence: 82%

Section: Freshwater and Brackish Watermentioning

confidence: 89%

Section: Carbonates From the Lithofacies C2mentioning

confidence: 93%

Section: Implications For Sedimentary Environmentmentioning

confidence: 99%

See 2 more Smart Citations

Geochemical constraints on the origin of Doushantuo cap carbonates in the Yangtze Gorges area, South China

Wang

Lin

Chen

2014

Sedimentary Geology

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“…This research has aimed to: (i) evaluate their status of complexation (Cantrell and Byrne, 1987;Koeppenkastrop et al, 1991;Koeppenkastrop and De Carlo, 1992;Lee and Byrne, 1992;Millero, 1992); (ii) recognise YREE fractionation processes between dissolved and suspended phases (Elderfield et al, 1990;Alibo and Nozaki, 1999;Tachikawa et al, 1999;Quinn et al, 2004); (iii) examine the capability of YREEs as tracers of anthropogenic inputs both in rivers and coastal waters, especially in areas characterised by high population densities (e.g., Bau and Dulski, 1996); and (iv) evaluate the input mechanisms of these elements in seawater from atmospheric and riverine loads (Sholkovitz, 1993;Sholkovitz et al, 1999;Hannigan and Sholkovitz, 2001;Aubert et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Alteration effects of volcanic ash in seawater: Anomalous Y/Ho ratios in coastal waters of the Central Mediterranean sea

Censi

Sprovieri

Larocca

et al. 2007

Geochimica et Cosmochimica Acta

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This paper presents the results of a study based on data collected during the oceanographic cruise ANSIC 2001 carried out in the Ionian Sea during the explosive activity of Mount Etna in the summer of 2001. Anomalous low values of Y/Ho ratios in seawater suggest extensive scavenging processes on the surfaces of smectitic alteration products, with Y and Ho fractionation controlled by the differences in their electronic configurations and behaviour during solution/surface complexation equilibria. These processes can also be traced through the presence of significant tetrad effects recorded in the chondrite-normalised Rare Earth Elements and Yttrium (YREEs) patterns of suspended particulate matter. This suggests that the preferential Y scavenging from seawater is due to the formation of inner-sphere complexes with OH À groups on montmorillonite crystal surfaces. The preliminary results of kinetic experiments of YREE released from volcanic ash to coexisting seawater, and the related effects on Y/Ho ratios and Ce anomalies, are consistent with the fractionation of Light Rare Earth Elements (LREEs) with respect to Heavy Rare Earth Elements (HREEs) observed in dissolved phase. They suggest a behaviour of Y similar to that reported for LREEs, particularly for Ce and Pr.

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Ocean chlorophyll response to two types of El Niño events in an ocean‐biogeochemical coupled model

Lee

Yeh

Kug³

et al. 2014

JGR Oceans

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Based on a long-term simulation of an ocean-biogeochemical coupled model, we investigate the biogeochemical response to the two types of El Niño events, a Cold Tongue (CT)-El Niño and a Warm Pool (WP)-El Niño, in which a local maximum of anomalous sea surface temperature (SST) is located in the eastern and central tropical Pacific. Our model is able to reasonably simulate the characteristics of the biological variables in a way comparable to the observations. During the developing period, anomalous low chlorophyll appears in the eastern Pacific, while it appears in the central Pacific in the WP-El Niño. The difference in the spatial-temporal response of chlorophyll for the two types of El Niño events is mainly due to the eastward zonal advection of upper ocean currents, which plays a role in bringing nutrient-poor water from the western Pacific. During the decaying period of the WP-El Niño, anomalous high chlorophyll appears concurrently with anomalous low SST in the eastern Pacific. Conversely, anomalous high chlorophyll appears in the central Pacific prior to the decaying period of the CT-El Niño. In particular, the anomalous low sea level from the northwestern Pacific shifts to the southern equatorial region during the decaying period of the CT-El Niño. This drives anticyclonic boundary currents which enhance the Equatorial Undercurrent, playing a role in the supply of nutrients to the central equatorial Pacific, resulting in an increase in chlorophyll concentration in the same region.

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Island weathering: river sources of rare earth elements to the Western Pacific Ocean

Cited by 180 publications

References 30 publications

Geochemical constraints on the origin of Doushantuo cap carbonates in the Yangtze Gorges area, South China

Geochemical constraints on the origin of Doushantuo cap carbonates in the Yangtze Gorges area, South China

Alteration effects of volcanic ash in seawater: Anomalous Y/Ho ratios in coastal waters of the Central Mediterranean sea

Ocean chlorophyll response to two types of El Niño events in an ocean‐biogeochemical coupled model

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