Sources of dissolved REE in mountainous streams draining granitic rocks, Sierras Pampeanas (Córdoba, Argentina)

Garcia, Marie-Carmen; Lecomte, Karina Leticia; Pasquini, Andrea I.; Formica, Stella M.; Depetris, Pedro J.

doi:10.1016/j.gca.2007.09.017

Cited by 52 publications

(19 citation statements)

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“…Annual rainfall is highly seasonal and torrential, varying from 900 mm in the Sierras Grandes to 500 mm further westward. Occasional snowfall in autumn-winter also occurs in the Sierras Grandes (García et al 2007). Spring and summer are considered to be the rainy seasons (Bermudez et al 2009;Bertolino et al 2007;García et al 2007), with winter being very dry.…”

Section: Area Of Studymentioning

confidence: 99%

Evaluating top soil trace element pollution in the vicinity of a cement plant and a former open-cast uranium mine in central Argentina

et al. 2010

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Purpose Heavy metals are especially dangerous because of their persistence and toxicity. Soil behaves as a sink of heavy metals by aerial deposition of particles emitted by different human activities. The aims of this work were to identify the levels and sources of heavy metal and trace elements in agricultural and residential areas in Argentina and to evaluate the enrichment of total and HCl-extracted heavy metals. Materials and methods Ninety-four topsoil samples were collected in Córdoba, Argentina (0-10 cm). The majority of the samples were subject to agricultural practices. The possible metal pollution sources were a cement plant and an industrial waste incinerator, a former open-cast uranium mine, petrochemical, and mechanical and metallurgical industries among others. The elements As, and Zn were measured by neutron activation analysis, and Co, Cu, Fe, Mn, Ni, Pb, and Zn were partially extracted by 0.5-M HCl and measured using atomic absorption spectroscopy. Several nonparametric statistics were performed to the dataset in order to accomplish the objectives of the study. Results and discussion The mean total Ba concentration exceeded soil quality guidelines for residential areas, with the maximum total As and Co concentrations surpassing the agricultural and residential limits stated in national and international legislations. The elements As and Ba were found to be controlled by parent factors, whereas Ca, Co, Cr, Cu, Mn, Ni, Pb, and Zn were controlled by both anthropogenic and pedogenic factors. A cement plant was the main source of Ca, Co, Cr, Cu, Mn, Ni, Pb, and Zn, whereas lanthanides, Fe, K, U, and also Zn were associated with a former open-cast operation uranium mine. A correlation analysis showed that soil organic matter and pH had strong associations with 0.5-M HCl-extracted Co, Cu, Mn, Ni, Pb, and Zn. Conclusions Fe-normalized enrichment factors calculated for 0.5-M HCl-extracted heavy metals are potentially significant for characterizing the element bioavailability, the anthropogenic contamination, and the anomaly assessment. According to soil quality guidelines for environmental health, the human and wildlife populations in Córdoba Province might be experiencing toxic As, Ba, Co, Cr, Ta, U, and Zn effects. Therefore, mitigation strategies should be performed on an abandoned mine (Schlagintweit Uranium Mine), Yocsina, Despeñaderos, and Oliva.

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Section: Area Of Studymentioning

confidence: 99%

Evaluating top soil trace element pollution in the vicinity of a cement plant and a former open-cast uranium mine in central Argentina

et al. 2010

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“…Hydrothermal fluids mainly display REE+Y patterns with positive Eu anomaly and light to middle REE-enriched patterns when normalized to PAAS (Wheat et al, 2002). However, river water shows flat REE+Y patterns with slight light REE depletion and no anomalies and so marine and lacustrine carbonates can be easily distinguished (Bolhar and Van Kranendonk, 2007;Garcia et al, 2007). In ancient carbonate rocks, REEs provide important information regarding the marine and estuarine redox history (German and Elderfield, 1990;Bellanca et al, 1997) and palaeoceanography (Liu, et al, 1988;Shields and Webb, 2004).…”

Section: Introductionmentioning

confidence: 99%

Petrography, geochemistry and stable isotopes of carbonate rocks, Lower Cretaceous Alisitos Formation, Los Torotes section, Baja California, Mexico

Madhavaraju¹,

Löser²,

Scott³

et al. 2017

Rev. Mex. Cien. Geol.

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Petrography, stable carbon and oxygen isotopes, and major, trace, and rare earth elements geochemistry of limestones of the Alisitos Formation in the Los Torotes, Baja California were studied in order to document the elemental variations among Member C (MC) and Member E (ME) of the formation and to understand their diagenetic and depositional conditions. The major petrographic types identified are mudstone, wackestone and packstone. The limestones of the Alisitos Formation show significant variations in δ 13 C and δ 18O values (+4.13 to +5.26‰; -14.17 to -6.84‰; respectively). The limestones from Member C (MC) show higher ΣREE content (23 ± 17, n=10) than Member E (ME) (11 ± 5.5, n=9) of the Alisitos Formation. The observed variations in ΣREE content in these limestones are due to the amount of detrital material present in them. The limestones from ME record seawater-like REE+Y patterns, whereas the MC records non-seawater-like signatures (i.e. significant enrichment of middle rare earth elements: MREE). Most of the analyzed samples from the Alisitos Formation show negative Ce anomalies (Ce/Ce*: 0.67 -0.99, n=17). The limestones show both negative and positive Eu anomalies (Eu/Eu*: 0.58 -2.91, n=19). The positive Eu anomalies identified in many samples may be due to the influence of hydrothermal fluids or co-precipitation of hydrothermal Fe-sulfide. The limestones of ME exhibit seawater-like-REE patterns suggesting that most of the REEs present in them were derived from seawater. However, the limestones of MC were contaminated by detrital materials which effectively mask the seawater-like signatures. The detrital materials present in the limestones of MC were probably derived from the mafic to felsic source rocks.

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“…However, the acidic hydrothermal fluids show very different REE+Y patterns, including a distinct positive Eu anomaly, and light to middle REE enriched patterns when PASS normalized (Michard et al, 1983;Bau and Dulski, 1999;Wheat et al, 2002). Differently, river water is characterized by relatively flat REE+Y patterns with slight light REE depletion and no obvious anomalies (Goldstein and Jacobsen, 1988;Lawrence et al, 2006;García et al, 2007). It has been used successfully to distinguish marine and lacustrine carbonates (Bolhar and Van Kranendonk, 2007).…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics and geological significance of the Neoproterozoic carbonates from northern Anhui Province, China

Sun¹,

Gui²,

Chen³

et al. 2011

Chin. J. Geochem.

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Petrographical and geochemical studies were carried out of the Neoproterozoic carbonates from northern Anhui Province, China. These carbonates can be subdivided into two types, including purified limestone (PL) and mixed limestone and siliclastic rocks (MLS). PLs are low in Si, Al, Zr and total REE but high in CaO compared with MLSs. Correlations between Zr, Fe 2 O 3 , P 2 O 5 and total REE are also less remarkable, indicating that they were not obviously contaminated by continental materials but directly precipitated from seawater. So they can be used for the inversion of paleo-seawater REE patterns. The inversed results indicated that the REE pattern of Neoproterozoic seawater was similar to that of the modern seawater except for the lack of Ce depletion, which was probably affected by the reduced hydrothermal solution. In combination with previous studies, the geochemical trending of these carbonatic samples towards the continental arc in the La-Th-Sc and Th-Sc-Zr/10 diagrams is interpreted as the contamination of arc volcanism. The tectonic background of the southern margin of the North China Craton in the Neoproterozoic was probably related to the Grenville orogeny during the convergence of the Rodinia supercontinent, rather than an intra-plate environment.

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Sources of dissolved REE in mountainous streams draining granitic rocks, Sierras Pampeanas (Córdoba, Argentina)

Cited by 52 publications

References 53 publications

Evaluating top soil trace element pollution in the vicinity of a cement plant and a former open-cast uranium mine in central Argentina

Evaluating top soil trace element pollution in the vicinity of a cement plant and a former open-cast uranium mine in central Argentina

Petrography, geochemistry and stable isotopes of carbonate rocks, Lower Cretaceous Alisitos Formation, Los Torotes section, Baja California, Mexico

Geochemical characteristics and geological significance of the Neoproterozoic carbonates from northern Anhui Province, China

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