Origin of Minerals and Critical Metals in an Argillized Tuff from the Huayingshan Coalfield, Southwestern China

Zhao, Laishi; Zhu, Qin; Jia, Shaohui; Zou, Jianhua; Nechaev, Victor P.; Dai, Shifeng

doi:10.3390/min7060092

Cited by 29 publications

(4 citation statements)

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“…Different alteration assemblages detected are thought to reflect the variations in eogenetic fluid composition and extent of fluid circulation. More specifically, the dominance of expandable clay species (smectite and illite–smectite) in the lower and middle portion of the column must have resulted from an extensive in situ eogenesis of coarse‐ash sized and permeable pyroclastic material, which led to clay mineral formation in an open hydrologic system (e.g., Christidis & Huff, ; Šegvić et al, ; Zhao et al, ). This conforms to the general up‐section grain size decrease reported herein.…”

Section: Discussionmentioning

confidence: 99%

An ensialic volcanic arc along the northwestern edge of Palaeotethys—Insights from the Mid‐Triassic volcano‐sedimentary succession of Ivanščica Mt. (northwestern Croatia)

et al. 2019

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This work aims to unveil the origin, geodynamic significance, and diagenetic history of pyroclastites and associated chert documented within the Upper Anisian volcanosedimentary succession of the Ivanščica Mt. in Central Europe. An abundance of pyroclastic material points to polyphase volcanic activity and deep-water sedimentation along the rim of an oceanic realm. Radiolarian-based dating revealed Illyrian age of chert intercalated with pyroclastites. The latter are largely vitro-crystalloclastic and were emplaced as airborne tuff. The crystalloclasts of sanidine, plagioclase, altered pyroxene, and amphibole are principal tuff constituents merged in the altered glassy matrix consisted of palagonite, clay minerals, and calcite. Variations in alteration assemblages reflect an extensive in situ eogenesis in an open hydrologic system that gradually evolved toward a restricted fluid percolation environment. Mineralogy, chemistry, and occurrence of andesitic tuff clearly denote an explosive volcanic activity formed at the top of suprasubduction zone. Such scenario presumes a complex genesis outlined in following steps: (a) partial melting and dehydration of down-going Palaeotethyan slab which gave rise to the subduction-related magmatism {LILE, Th, and LREE [(La/Lu) cn = 6.51−9.42] enrichment; negative anomalies of Nb-Ta, P, and Ti [e.g., (Nb/La) n = 0.31−0.44]}; (b) magma contamination via interaction with continental crust during magma uplift along tectonically weakened zones of upper crust [positive Pb spikes, negative ε Nd (−4.18 to −4.44), and 147 Sm/ 144 Nd ≤ 0.113175]. This is in favour of geodynamic evolution that hypothesizes the existence of an active, ensialic, and mature volcanic arc developed along the southern active continental margins of Euramerica (Laurussia) during Late Anisian subduction of Palaeotethyan lithosphere.

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Section: Discussionmentioning

confidence: 99%

An ensialic volcanic arc along the northwestern edge of Palaeotethys—Insights from the Mid‐Triassic volcano‐sedimentary succession of Ivanščica Mt. (northwestern Croatia)

et al. 2019

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“…According to the literature, the Ga content in coal deposits can reach 263 ppm [82], with Clarke values for this element determined at 5.5 ppm in lignite, 6.0 ppm in bituminous coal, and 5.8 ppm on average [39]. In the case of coal ashes, the gallium Clarke value is 29 ppm for lignite ash, 36 ppm for bituminous coal ash and, on average, 33 ppm for coal ashes [39].…”

Section: Ga-galliummentioning

confidence: 99%

Ash Characteristics and Selected Critical Elements (Ga, Sc, V) in Coal and Ash in Polish Deposits

Bielowicz

2020

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The chemical composition of coal ash and the content of the critical elements Ga, Sc, and V in coal and ash are examined herein. In this study, lignite and bituminous coal from Polish deposits were used. The coals were subjected to ultimate and proximate analysis; the petrographic composition was determined based on maceral groups. The chemical composition of ash and the content of critical elements were determined using ICP-MS. The obtained results were correlated and Pearson’s linear correlation coefficient was determined. Based on the correlation analysis, the relationship between the chemical composition of ash and the proximate and ultimate analyses was demonstrated. The content of selected critical elements in the tested deposits was lower than the Clarke value in coal. However, in some deposits these contents are much higher in coal ashes. The higher levels of Ga, V, and Sc in the ash are associated with Al2O3. Therefore, it can be stated that ashes can be a potential source of some raw materials. The highest concentrations of critical elements in coal and ash were recorded in the Lublin Coal Basin. Supra-Clarke contents of Ga, V, and Sc were recorded in the Bogdanka coal mine.

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“…Firstly, the alkali volcanic ash was leached by the mixed high-temperature hydrothermal solution (including acidic waters and CO 2 degassing from the Emeishan Plume) and resulted in the in situ enrichment of Al, Ti and the depletion of Nb, Zr, Ga and REY [92]. Secondly, the leached Nb, Zr, Ga and REY were precipitated under the environment of cooler, neutral or alkaline hydrothermal fluid alteration [92], and in some cases, with injection of sea water [93].…”

Section: Injection Of Low-temperature Hydrothermal Fluidsmentioning

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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Origin of Minerals and Critical Metals in an Argillized Tuff from the Huayingshan Coalfield, Southwestern China

Cited by 29 publications

References 40 publications

An ensialic volcanic arc along the northwestern edge of Palaeotethys—Insights from the Mid‐Triassic volcano‐sedimentary succession of Ivanščica Mt. (northwestern Croatia)

An ensialic volcanic arc along the northwestern edge of Palaeotethys—Insights from the Mid‐Triassic volcano‐sedimentary succession of Ivanščica Mt. (northwestern Croatia)

Ash Characteristics and Selected Critical Elements (Ga, Sc, V) in Coal and Ash in Polish Deposits

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

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