Comprehensive REE + Y and sensitive redox trace elements of Algerian phosphorites (Tébessa, eastern Algeria): A geochemical study and depositional environments tracking

Kechiched, Rabah; Laouar, Rabah; Bruguier, Olivier; Kocsis, László; Salmi-Laouar, Sihem; Bosch, Delphine; Ameur-Zaimeche, Ouafi; Foufou, Atif; Larit, Hamza

doi:10.1016/j.gexplo.2019.106396

Cited by 52 publications

(38 citation statements)

References 81 publications

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“…Both of these catchments apparently have processes in operation favouring preferential Gd release and/or complexed aqueous stability, but which remain poorly understood. Similarly, the minor Y anomalies cannot be readily attributed to a source of marine carbonate (Ryan et al 2018), with only minor inliers of Paleozoic carbonate present upstream, or marine phosphate-bearing agricultural fertilizer (Lawrence et al 2006b, Kechiched et al 2020. A potential exception may be revealed through the chemistry of the SLRS-5 and SLRS-6 CRM, which were sampled downstream of the aforementioned sources and have slightly higher Y/Ho ratios than SLRS-3/-4 and the new upstream ORB samples.…”

Section: Ree+y Pattern Implications For Element Sourcing Riverine Fractionation and Long-term Catchment Flux Consistencymentioning

confidence: 95%

Ultra-trace Element Characterization of the Central Ottawa River Basin using a Rapid, Flexible, and Low-volume ICP-MS Method

et al. 2020

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Ultra-trace (<1 ng g -1 ) rare earth elements and yttrium (REE+Y) and high field strength element (HFSE) geochemistry of freshwater can constrain element sources, aqueous processes in hydrologic catchments, and the signature of dissolved terrestrial fluxes to the oceans. This study details an adapted method capable of quantifying ≥38 elements (including all REE+Y, Nb, Ta, Zr, Hf, Mo, W, Th, U) with minimal sample preparation in natural water aliquots as low as ≤2 mL. The method precision and accuracy are demonstrated using measurement of the National Research Council -Conseil national de recherches Canada (NRC-CNRC) river water certified reference material (CRM) SLRS-6 sampled from the Ottawa River (OR).Data from SLRS CRM are compared to those of new, filtered (<0.45 µm) stream water samples from the central Ottawa River basin (ORB), and discussed in terms of processes and geochemical signatures inherited from the highly evolved igneous/metamorphic Archean and Proterozoic bedrock in the catchment. The ORB waters have significantly LREE>HREE-enriched REE+Y patterns, small natural positive Y and Gd anomalies, and negative Eu and Ce anomalies. These REE+Y features are coherent downstream in the OR apart from amplification of Eu and Ce anomalies during REE removal/dilution. The OR samples capture a downstream decrease in sparingly soluble HFSE (Th, Nb, Ta, Zr, Hf), presumably related to their colloid-particulate removal from the dissolved load, accompanied by crustal Zr/Hf (32.5 ± 5.1) and supercrustal Nb/Ta (25.1 ± 7.7) ratios. Subcrustal Th/U (0.17-0.96) and supercrustal Mo/W (12.0-74.5) ratios in all ORB waters indicate preferential release and aqueous solubility of U>Th and Mo>W, with the latter attributed primarily to preferential W adsorption on soil or upstream aquatic (oxy)(hydr)oxide surfaces.

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Section: Ree+y Pattern Implications For Element Sourcing Riverine Fractionation and Long-term Catchment Flux Consistencymentioning

confidence: 95%

Ultra-trace Element Characterization of the Central Ottawa River Basin using a Rapid, Flexible, and Low-volume ICP-MS Method

et al. 2020

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“…Rare earth elements (REEs) are transported into the ocean with suspended particles and detrital minerals, and the residence time of these particles and minerals in the sea water determines the degree of differentiation of the REEs [66]. Generally, a fast sedimentation rate corresponds to a moderate La N /Yb N ratio and a low Nd concentration, while a slow sedimentation rate results in differentiation between La and Yb and the enrichment of Nd [66][67][68][69]. As shown in Figure 8, wells ZK102 and ZK205 have lower La N /Yb N ratios and approximately equal Nd concentrations compared to the Yankong and Songlin sections, indicating that the sedimentation rate in the slope and deep basin settings was slightly faster than that in the intra-platform basin during the Ediacaran-Cambrian transition stage.…”

Section: Sedimentation Ratementioning

confidence: 99%

Depositional Environment and Organic Matter Enrichment of Early Cambrian Niutitang Black Shales in the Upper Yangtze Region, China

et al. 2022

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Natural gas generation is the result of organic matter degradation under the effects of biodegradation and thermal degradation. Early Cambrian black shales in the Upper Yangtze Region are rich in organic matter and have shown great shale gas potentiality in recent years. Nevertheless, the enrichment mechanism and distribution of organic matter in these black shales between different sedimentary settings, such as intra-platform basin, slope, and deep basin, are still poorly understood. In this paper, based mainly on elemental geochemistry, a comprehensive study of the marine redox conditions, primary productivity, sedimentation rate, terrigenous input, hydrothermal activity, and water mass restrictions was conducted on the Early Cambrian Niutitang black shale in the Upper Yangtze Region. Our data showed that an intra-platform basin received a higher terrigenous input and that it deposited under more restricted conditions than the slope and deep basin settings. The primary productivity in the slope and deep basin settings was higher than that in the intra-platform basin setting. In the intra-platform basin, the productivity increased from its inner part to its margin. For the slope and deep basin settings, the high paleoproductivity generated large amounts of organic matter and its preservation was synergistically affected by the redox conditions. In contrast to the slope and deep basin, the preservation of organic matter in the inner part of the intra-platform basin was mainly controlled by redox conditions because the paleoproductivity in it was much lower than in the slope and deep basin settings. The intra-platform basin margin was the most favorable area for accumulating organic matter.

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“…A complementary spatial distribution of Mn and Ce was observed. This indicated that the oxidative dissolution of Mn from the sediment particles can generate Ce enrichment from Ce 4+ [ 59 , 60 ]. The cerium concentration showed the highest variability along the lake and between the two sampling periods, indicating different transport and deposition processes of the sediments in addition to redox conditions of the lake.…”

Section: Resultsmentioning

confidence: 99%

“…Negative significant correlations were observed between Mn and Zr (r = −0.68), Hf (r = −0.68), and Ce (r = −0.69) in October. These observations suggested that the reductive dissolution of Mn from the sediment can generate Ce, Hf, and Zr enrichment because these elements are redox condition sensitive [ 59 , 60 ].…”

Section: Resultsmentioning

confidence: 99%

Assessment of the Anthropogenic Impact and Distribution of Potentially Toxic and Rare Earth Elements in Lake Sediments from North-Eastern Romania

Soroaga

Amarandei

Negru

et al. 2022

Toxics

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Chemical analysis was performed on sediment samples collected in two sampling sessions (July and October) from Podu Iloaiei Dam Lake, one of the most important water resources used for aquaculture in north-eastern Romania. The concentration of 15 trace elements (TEs), 8 refractory elements (REs), and 15 rare earth elements (REEs)—determined using inductively coupled plasma mass spectrometry—showed variability largely dependent of the sampling points and collection time. Manganese was the most abundant TE, V and Cr were the most abundant REs, while Ce was one of the most abundant REEs. The cerium negative anomaly and Gd positive anomaly were observed in the Chondrite-normalized distributions. In October, the Ce anomaly showed significant negative correlation with Mn, emphasizing the water body oxidation potential. The identified positive Gd anomaly was most likely associated with the use of Gd-chelating agents in magnetic resonance imaging in Iasi, the largest medical hub in north-eastern Romania. Principal component analysis extracted three factors explaining 96.0% of the observed variance, i.e., rock weathering, leaching from soil surface, contributions from urban stormwater and atmospheric deposition (50.9%), pedological contributions (23.7%), and mixed anthropogenic sources (e.g., traffic, waste discharge, agricultural activities; 21.4%). The evaluation of pollution indices highlighted low and moderate degrees of contamination for most of the elements and a considerable degree of contamination for Cd. Assigned Cd sources included fertilizers and pesticides used in the near agricultural areas or the high traffic road located near the lake. Since contamination of aquatic ecosystems with harmful elements is a human health concern, further monitoring of specific vectors in the food chain of the investigated dam lake will be of the utmost importance.

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Comprehensive REE + Y and sensitive redox trace elements of Algerian phosphorites (Tébessa, eastern Algeria): A geochemical study and depositional environments tracking

Cited by 52 publications

References 81 publications

Ultra-trace Element Characterization of the Central Ottawa River Basin using a Rapid, Flexible, and Low-volume ICP-MS Method

Ultra-trace Element Characterization of the Central Ottawa River Basin using a Rapid, Flexible, and Low-volume ICP-MS Method

Depositional Environment and Organic Matter Enrichment of Early Cambrian Niutitang Black Shales in the Upper Yangtze Region, China

Assessment of the Anthropogenic Impact and Distribution of Potentially Toxic and Rare Earth Elements in Lake Sediments from North-Eastern Romania

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Comprehensive REE + Y and sensitive redox trace elements of Algerian phosphorites (Tébessa, eastern Algeria): A geochemical study and depositional environments tracking

Cited by 52 publications

References 81 publications

Ultra-trace Element Characterization of the Central Ottawa River Basin using a Rapid, Flexible, and Low-volume ICP-MS Method

Ultra-trace Element Characterization of the Central Ottawa River Basin using a Rapid, Flexible, and Low-volume ICP-MS Method

Depositional Environment and Organic Matter Enrichment of Early Cambrian Niutitang Black Shales in the Upper Yangtze Region, China

Assessment of the Anthropogenic Impact and Distribution of Potentially Toxic and Rare Earth Elements in Lake Sediments from North-Eastern Romania

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Comprehensive REE + Y and sensitive redox trace elements of Algerian phosphorites (Tébessa, eastern Algeria): A geochemical study and depositional environments tracking