Diagenetic uptake of rare earth elements by bioapatite, with an example from Lower Triassic conodonts of South China

Chen, Jianbo; Algeo, Thomas J.; Zhao, Laishi; Chen, Zhong‐Qiang; Cao, Ling; Zhang, Lei; Li, Yang

doi:10.1016/j.earscirev.2015.01.013

Cited by 224 publications

(100 citation statements)

References 118 publications

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“…The average redox-sensitive trace elements (V, Mo, U, Cu, Cr, Se, Cd, Co and Zn) in the studied phosphatic rocks from Yunis mines (1364, 415.5, 47.5, 106.2, 132.5, 62.5, 57.5, 23 and 176ppm; for OShP, also 331, 61, 50,99,138,62,52,20 and 159ppm for OCP, as well as 197, 15,97,41,88,24,7,12, and 332ppm for Um El-Hwutat mines show enrichments of the redoxsensitive elements (97, 1.5, 2.5, 28, 92, 0.34, 0.098, 17.3 and 67 ppm; respectively) compared to the composition of the bulk continental crust [44]. The enrichment relative to continental crust are range from a few times as in the case of Cu, Co, Cr and Zn; to ten times for elements such as V and U; to hundreds of times in the case of Mo, and thousands of times for Cd and Se.…”

Section: Depositional Environmentalmentioning

confidence: 96%

“…REE compositions of the phosphatic rocks have been modeled previously to assess the mechanism of REE uptake and subsequent alteration during diagenesis [24,25] and identify sequential the palaeo-seawater REE compositions [26,27]. Thus, REE incorporation was phosphatic rocks attributed to either adsorption or substitution mechanisms during diagenesis [28,29].…”

Section: Major Oxides (%) and Trace Elements (Ppm)mentioning

confidence: 99%

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P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

2019

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T HE Duwi Formation in Qusseir-Safaga region is conformably overlain by the Qusseir variegated shales and underlain by the Dakhla shales. The studied phosphatic rocks in the Duwi Formation, is an attractive rock unit for it's enrichment in heavy metals and U content.Mineralogically, phosphatic rocks in the Duwi Formation are mainly composed mainly of fluorapatite, in addition to minor occurrence of calcite, dolomite, gypsum, quartz, and pyrite. Geochemical data reveal that the rocks of the Duwi Formation were deposited under anoxic environments. The present study used the statistical result of the interrelation between P 2 O 5 , F and U concentrations on Egyptian phosphate samples and compared to the measured data. Uranium mostly occurs in an oxidized U 6+ state. It could be fixed with the phosphatic ion, forming secondary uranium phosphate minerals such as phosphuranylite and belovite in Qusseir region. In addition to Uranyl phosphates, uranium minerals in Safaga region contain also Uranyl carbonates and Uranyl sulfates, which had been attributed to the post-depositional U enrichment. The chemical data and index show that the phosphatic rocks in Safaga region are more enriched in the majority trace and rare earth elements, and are subjected to high chemical weathering than those in Qusseir region.

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Section: Depositional Environmentalmentioning

confidence: 96%

Section: Major Oxides (%) and Trace Elements (Ppm)mentioning

confidence: 99%

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

2019

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“…show an anoxic condition. Shields (2001) found the diagenesis can also modify Ce/Ce* values through the study of rare earth elements, and there are good correlations between Ce and Eu anomalies, Dy N /Sm N ratio and ΣREEs in that condition (Shields, 2001;Zhao et al, 2013;Chen, Algeo, et al, 2015;Li et al, 2017). For the Zhifang Formation samples, there is a good correlation between Ce and Eu anomalies.…”

Section: Ce and Eu Anomaliesmentioning

confidence: 95%

“…Trace elements and REEs are stable during sedimentation and diagenesis. Due to the poor solubility and short residence time in water, they can rapidly penetrate into fine-grained sediments, resulting in a good preservation of geochemical information for the provenance area in fine-grained sediments (Taylor & McLennan, 1985;Bhatia, 1985;Chen, Algeo, et al, 2015). Using the properties of stable trace elements and REEs, including La, Th, Sc, Co, and Zr, Bhatia and Crook (1986) The study sections are located in the southern Ordos Basin, and its sedimentary and tectonic backgrounds are mainly influenced by the evolution of the Qinling orogenic belt Qinling region entered a full-scale orogenic stage of land-land collision (Yu et al, 2005;Zhang, Zhang, Yuan, & Xiao, 2001).…”

Section: Regional Tectonic Implicationsmentioning

confidence: 99%

Geochemical characteristics and depositional environments of mudstones from the Triassic Zhifang Formation in the Tongchuan Area, southern Ordos Basin, China

et al. 2019

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Significant sedimentary and tectonic information is preserved in the geochemical characteristics of the Middle Triassic Zhifang Formation in the southern Ordos Basin, North China. In this paper, elemental geochemical analysis is performed for 12 mudstone and siltstone samples from the Zhifang Formation of the Liangzhai River-Liulinchuan section of Tongchuan City, Shaanxi Province, with a major element analysis performed via X-ray fluorescence spectrometry, trace element and rare earth element (REE) analyses performed via inductively coupled plasma mass spectrometry (ICP-MS). The palaeoenvironment and tectonic backgrounds of the study section are also studied by analyzing the elements and elemental ratios sensitive to palaeoenvironmental conditions. The geochemical proxies, including the concentrations of U, and ratios of Fe 2 O 3 /FeO, U/Th, V/(V + Ni), V/Cr, and Ni/Co indicate that the depositional environment of the Zhifang Formation was likely an oxic-dysoxic condition without strong lake-water stratification. The oxic-dysoxic condition is interpreted as one of the key controlling factors for the poor development of source rocks in the Zhifang Formation, although this formation is dominated by black fine-grained sediments. Because of the Qinling orogenic belt, the geochemical characteristics reflect a tectonic background of the provenance area that was an active continental margin related to the continental island arc.

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“…It is suggested that the dominant terrigenous material of the Lopingian coals in southwestern China is the basaltic Kangdian Upland, which is typically enriched in Sc, V, Cr, Co, Ni, Cu and Zn [10,45,64,[68][69][70][71]. For example, the dominant terrigenous material for the coals in the Xinde Mine, Yunnan Province, southwestern China is identified as the Kangdian Upland, with high concentrations of Sc, V, Cr, Co, Ni, Cu and Zn in the coals [45].…”

Section: Sediment Source Regionmentioning

confidence: 99%

Mineralogical and Geochemical Compositions of the Lopingian Coals in the Zhongliangshan Coalfield, Southwestern China

et al. 2018

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Abstract:The mineralogical and geochemical compositions of the Lopingian coals from an exploratory drill core (ZK4-1) in the Zhongliangshan Coalfield, southwestern China are reported in this paper. The Zhongliangshan coals are medium volatile bituminous in rank (random vitrinite reflectance, average 1.38%), characterized by a medium-ash yield (26.84%) and high sulfur content (3.38%). Minerals in the Zhongliangshan coals are mainly composed of clay assemblages (kaolinite, the illite/smectite mixed layer (I/S) and chamosite), pyrite, quartz, carbonate minerals (calcite, marcasite, ankerite, and dolomite), and anatase, followed by rutile, jarosite, natrojarosite, bassanite, gypsum and K-feldspar, with traces of apatite, rhabdophane and barite. Compared with the average concentrations of the world hard coals, some trace elements including Li, V, Co, Cu, Se, Y, Zr, Nb, rare earth elements (REE), Cd, Ta, Hf and Hg, are enriched in the Zhongliangshan coals. The modes of occurrence of chamosite, barite, rhabdophane, quartz and calcite in the Zhongliangshan coals indicate that the coals have probably been affected by the injection of low-temperature hydrothermal fluids. Based on the concentrations of Sc, V, Cr, Co, Ni, Cu and Zn, the ratios of Al 2 O 3 /TiO 2 and the upper continental crust-normalized rare earth element and yttrium (REY) distribution patterns of the Zhongliangshan coals, the dominant sediment source regions are the Leshan-Longnvsi Uplift, Hannan Upland, and Dabashan Uplift, with a small proportion of terrigenous materials from the Kangdian Upland. The K7 and the upper portion of K1 coals have the potential as raw materials for the recovery of REY.

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Diagenetic uptake of rare earth elements by bioapatite, with an example from Lower Triassic conodonts of South China

Cited by 224 publications

References 118 publications

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

Geochemical characteristics and depositional environments of mudstones from the Triassic Zhifang Formation in the Tongchuan Area, southern Ordos Basin, China

Mineralogical and Geochemical Compositions of the Lopingian Coals in the Zhongliangshan Coalfield, Southwestern China

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