Nature of tonsteins in the Azeisk deposit of the Irkutsk Coal Basin (Siberia, Russia)

Арбузов, Сергей Иванович; Mezhibor, Antonina; Spears, D. A.; Ilenok, S.S.; Shaldybin, M.V.; Belaya, E.V.

doi:10.1016/j.coal.2015.12.001

Cited by 62 publications

(46 citation statements)

References 37 publications

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“…Nevertheless, the rare presence of carbonates indicating neutral conditions was also occurred. Other sulphide minerals like sphalerite and chalcopyrite seem to be developed from leached waters during diagenetic stages (Arbuzov et al, 2016). The acidic condition might also allow the reaction between weathered glass and P derived from organic matter (Triplehorn, 1990), thus, the identified alumina-phosphates in the samples might be formed in such way.…”

Section: Minerals In Intercalations and Altered Tuff Layersmentioning

confidence: 99%

“…Zircon and Cl-apatite are dominantly euhedral crystals (Fig. 7) that are characteristic for volcanic origin and also such crystals can be indicators for short distance transportation (Burger et al, 2002;Spears, 2012;Arbuzov et al, 2016). Feldspar in the altered tuff layers could also provide knowledge indications about the volcanic activity around the basin during the Miocene.…”

Section: Minerals In Intercalations and Altered Tuff Layersmentioning

confidence: 99%

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The Miocene coal seams in the Soma Basin (W. Turkey): Insights from coal petrography, mineralogy and geochemistry

Karayi̇ǧi̇t

Littke

Querol

et al. 2017

International Journal of Coal Geology

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The Soma Basin hosts three coal seams (kM2, kM3 and kP1) and several altered tuff layers within the Miocene sequences. This study focuses on the determination of coal petrography, Rock-Eval pyrolysis, mineralogy and elemental contents of the three coal seams from Eynez, Işıklar and Deniş sectors in the basin, and to identify the mineralogy of altered tuff layers within * Corresponding author, **visiting scholar

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Section: Minerals In Intercalations and Altered Tuff Layersmentioning

confidence: 99%

Section: Minerals In Intercalations and Altered Tuff Layersmentioning

confidence: 99%

The Miocene coal seams in the Soma Basin (W. Turkey): Insights from coal petrography, mineralogy and geochemistry

Karayi̇ǧi̇t

Littke

Querol

et al. 2017

International Journal of Coal Geology

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“…These volcanic layers in coal seams get much attention as they can help to identify times of volcanic eruption and magma intrusion in this area, assess the coal-forming environments, and facilitate stratigraphic subdivision and correlation [1][2][3][4][5][6][7][8]. Moreover, some volcanic layers in the coal seams may contain valuable trace elements (such as rare earth elements, Nb, Ta, Zr, Hf, and Ga) that could increase the potential value of the coal [4,5].…”

Section: Introductionmentioning

confidence: 99%

Origin of Minerals and Elements in the Late Permian Coal Seams of the Shiping Mine, Sichuan, Southwestern China

Luo

Zheng

2016

Minerals

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Volcanic layers in coal seams in southwestern China coalfields have received much attention given their significance in coal geology studies and their potential economic value. In this study, the mineralogical and geochemical compositions of C19 and C25 coal seams were examined, and the following findings were obtained. (1) Clay minerals in sample C19-r are argillized, and sedimentary layering is not observed. The acicular idiomorphic crystals of apatite and the phenocrysts of Ti-augite coexisting with magnetite in roof sample C19-r are common minerals in basaltic rock. The rare earth elements (REE) distribution pattern of C19-r, which is characterized by positive Eu anomalies and M-REE enrichment, is the same as that of high-Ti basalt. The concentrations of Ti, V, Co, Cr, Ni, Cu, Zn, Nb, Ta, Zr, and Hf in C19-r are closer to those of high-Ti basalt. In conclusion, roof sample C19-r consists of tuffaceous clay, probably with a high-Ti mafic magma source. (2) The geochemical characteristics of the C25 coals are same as those reported for coal affected by alkali volcanic ash, enrichment in Nb, Ta, Zr, Hf, and REE, causing the C25 minable coal seams to have higher potential value. Such a vertical study of coals and host rocks could provide more information for coal-forming depositional environment analysis, for identification of volcanic eruption time and magma intrusion, and for facilitating stratigraphic subdivision and correlation.

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“…The Sc-bearing traps of the Siberian Platform are a provenance area for the Irkutsk basin. The high Sc contents in the coals of the Azei deposit are concentrated on the northern margin of the basin, which is composed of Ordovician terrigenous carbonate sediments with thick sheets and sills of Triassic traps with weathering crusts which formed after them (Arbuzov et al, 2012). The Sc-bearing coals of the Minusa basin are also clearly confined to the blocks of the framing structures with widespread occurrence of femic structure-facies complexes (Arbuzov and Ershov, 2007).…”

Section: Resultsmentioning

confidence: 95%

Scandium in the coals of Northern Asia (Siberia, the Russian Far East, Mongolia, and Kazakhstan)

Арбузов

Волостнов

Mashen’kin³

et al. 2014

Russian Geology and Geophysics

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We present new original data on the geochemistry of scandium in the coals of Asian Russia, Mongolia, and Kazakhstan. In general, the studied coals are enriched in Sc as compared with the average coals worldwide. Coal deposits with abnormally high, up to commercial, Sc contents were detected in different parts of the study area. The factors for the accumulation of Sc in coals have been identified. The Sc contents of the coals depend on the petrologic composition of coal basins (composition of rocks in their framing) and the facies conditions of coal accumulation. We have established the redistribution and partial removal of Sc from a coal seam during coal metamorphism. The distribution of Sc in deposits and coal seams indicates the predominantly hydrogenic mechanism of its anomalous concentration in coals and peats. The accumulation of Sc in the coals and peats is attributed to its leaching out of the coal-bearing rocks and redeposition in a coal (peat) layer with groundwater and underground water enriched in organic acids. The enrichment of coals with Sc requires conditions for the formation of Sc-enriched coal-bearing rocks and conditions for its leaching and transport to the coal seam. Such conditions can be found in the present-day peatland systems of West Siberia and, probably, in ancient basins of peat (coal) accumulation.

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Nature of tonsteins in the Azeisk deposit of the Irkutsk Coal Basin (Siberia, Russia)

Cited by 62 publications

References 37 publications

The Miocene coal seams in the Soma Basin (W. Turkey): Insights from coal petrography, mineralogy and geochemistry

The Miocene coal seams in the Soma Basin (W. Turkey): Insights from coal petrography, mineralogy and geochemistry

Origin of Minerals and Elements in the Late Permian Coal Seams of the Shiping Mine, Sichuan, Southwestern China

Scandium in the coals of Northern Asia (Siberia, the Russian Far East, Mongolia, and Kazakhstan)

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