A preliminary study of mineralogy and geochemistry of four coal samples from northern Iran

Goodarzi, Fariborz; Sanei, Hamed; Stasiuk, Lavern D.; Bagheri-Sadeghi, H.; Reyes, Julito

doi:10.1016/j.coal.2005.04.014

Cited by 41 publications

(12 citation statements)

References 25 publications

(42 reference statements)

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“…Most of the Iranian coal resources are exposed in Alborz basin in the northern part of Iran and also in Kerman basin in the central-eastern part of Iran (Yazdi and Esmaeilnia 2003;Goodarzi et al 2006;Shojaei and Aftabi 2008;Yaghubpur and Hakkakzadeh 2011;Solaymani and Taghipour 2012;Moore and Esmaeili 2012). These studies provide a valuable contribution to some of the elemental composition of the Iranian coals.…”

Section: Introductionmentioning

confidence: 95%

“…Thus, although not ores at present time, the coal-bearing sandstones, black shales and coals should be investigated in terms of both environmental as well as economic considerations. Goodarzi (1994), Vine and Tourtelot (1970), Goodarzi and Cameron (1987), Grieve and Goodarzi (1993), Goodarzi et al (2006) and Finkelman et al (2002) contributed a large number of data on the distribution of minor elements from a wide variety of black shales and coals. Although the quality of coal is related to its rank and maceral composition, a comprehensive analysis of elemental concentration is necessary to explore the environmental quality of the coal.…”

Section: Introductionmentioning

confidence: 99%

“…Although the quality of coal is related to its rank and maceral composition, a comprehensive analysis of elemental concentration is necessary to explore the environmental quality of the coal. The mode of occurrence, distribution and concentration of inorganic elements in coal and black shales is reflected by the country rocks, geological model of coal deposition, the presence of sulfide minerals, structural disturbances, metamorphism, groundwater activity and weathering (Goodarzi and Swaine 1994;Goodarzi 1994;Goodarzi et al 2006;Finkelman et al 2002). Sulfide-associated elements, such as antimony, arsenic, cadmium, cobalt, copper, lead, mercury, molybdenum, nickel, selenium and zinc are very important as having some significant control on both coal quality and environmental issues.…”

Section: Introductionmentioning

confidence: 99%

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Geochemical and environmental baseline of major and trace elements in Zarand coals, southeastern Iran

Aftabi

Shojaei

Nezhad³

2014

Environ Earth Sci

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In order to establish a geochemical baseline for environmental impacts of coal measures in Rhaeto-Jurassic Zarand coalfields, multielement geochemistry of 22 host rocks, 26 coal seams and 9 coal ashes was determined by ICP-MS, ICP-AES, XRF, PGM-ICP24 and CV-ASS methods at ALS Chemex, Canada. The discrimination diagrams of major trace elements show a continental margin granitoid arc provenance for coal-bearing sandstones and shales. Compared to the crustal abundance, world coals and American coals, the geochemical baseline for most of the elements is within the limits of safeguard background values. However, higher contents of Li (49.31-185 mg/kg), Rb (71.12-131.73 mg/kg), Cs (7.13-16.12 mg/kg), V (72.19-213.1 mg/kg), Th (7.63-11.8 mg/kg), As (10.1-31.31 mg/ kg), Nb (5.4-15.07 mg/kg),Ta (0.4-1 mg/kg), Hf (1.89 mg/ kg), Ga (12.63-32.16 mg/kg), Ce (37.31-64.28 mg/kg), Pb (40.23-55.76 mg/kg), Cr (48.23-133 mg/kg), Zr (60.39 mg/ kg), and Hg (0.24 mg/kg), are of some environmental as well as economic concerns. The low values of B (0.12-12 mg/kg), S (7,839-10,567 mg/kg) and Zn (63.25-157.6 mg/kg) in Zarand coals may indicate a fluvial freshwater environment of coal deposition. Au, Pt and Pd contents are slightly higher than the crustal abundance and further studies are required for their possible environmental and economic evaluation. As the mean Hg value in ash (0.0075 mg/kg) is almost 32 times lower than the mercury content of the coal seams (0.24 mg/ kg), it is noteworthy that much of Hg is released by coal combustion to the atmosphere, which has certainly a detrimental environmental impact. The Ce, Cs, Ga, La, Li, Rb and V values are much higher than the average world and American coals and merit further investigations for being the economic by-products.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemical and environmental baseline of major and trace elements in Zarand coals, southeastern Iran

Aftabi

Shojaei

Nezhad³

2014

Environ Earth Sci

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“…As shown in Table 5, the Mahe coals show a slight negative Eu/Eu* anomaly, whereas other coals from the Xinde, Xuanwei, and Taoshuping mines have no or slight positive Eu/Eu* anomaly. The Eu/Eu* anomaly in coal, which is usually inherited from the parent rocks, is frequently used as an indicator of the terrigenous detrital sources [44,49]. The Emeishan silicic rock has a strong negative Eu/Eu* anomaly with the value of 0.56, whereas the basalt shows a positive Eu/Eu* anomaly with the value of 1.41 ( Table 5).…”

Section: Discussion: the Sources Of Minerals In The Mahe Coalsmentioning

confidence: 99%

Mineralogical and Geochemical Characteristics of Late Permian Coals from the Mahe Mine, Zhaotong Coalfield, Northeastern Yunnan, China

et al. 2015

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This paper reports the mineralogical and geochemical compositions of the Late Permian C2, C5a, C5b, C6a, and C6b semianthracite coals from the Mahe mine, northeastern Yunnan, China. Minerals in the coals are mainly made up of quartz, chamosite, kaolinite, mixed-layer illite/smectite (I/S), pyrite, and calcite; followed by anatase, dolomite, siderite, illite and marcasite. Similar to the Late Permian coals from eastern Yunnan, the authigenic quartz and chamosite were precipitated from the weathering solution of Emeishan basalt, while kaolinite and mixed-layer I/S occurring as lenses or thin beds were related to the weathering residual detrital of Emeishan basalt. However, the euhedral quartz and apatite particles in the Mahe coals were attributed to silicic-rock detrital input. It further indicates that there has been silicic igneous eruption in the northeastern Yunnan. Due to the silicic rock detrital input, the Eu/Eu* value of the Mahe coals is lower than that of the Late Permian coals from eastern Yunnan, where the detrital particles were mainly derived from the basalt. The high contents of Sc, V, Cr, Co, Ni, Cu, Ga, and Sn in the Mahe coals were mainly derived from the Kangdian Upland.

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“…The coal-bearing sedimentary sequences of the Azarbaijan, Alborz, and Tabas coalfields occur in the Shemshak Formation of Upper Triassic to Lower-Middle Jurassic age, which was deposited in a fresh water environment (Goodarzi et al 2006). The Shemshak Formation was deposited on limestone sequences and is overlain by Middle-Upper Jurassic limestones of the Lar Formation and is divided into different members in those areas (Fig.…”

Section: Geological Settingsmentioning

confidence: 99%

Rare earth element geochemistry of coals from the Mazino Coal Mine, Tabas Coalfield, Iran

Pazand

2015

Arab J Geosci

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The Mazino deposit with 650 Mt estimated reserves is the largest steam coal deposit in Iran. The concentrations and distribution patterns of rare earth elements (REEs) in coal, coaly shale and siltstone samples from the Mazino mine were studied by inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of ∑REEs in coal samples range from 16.4 to 184 ppm with average of 88.9 ppm. There are two types of distribution patterns of ∑REEs in the coal samples. One type, in the part of the section has slightly higher ∑REE concentrations and (Light REEs)/(Heavy REEs) ratio with a flat normalized REEs pattern; the other is enriched in HREEs relative to LREEs. The positive correlation and vertical variations of ∑REEs mainly follow those of the coal ash yield, and the SiO 2 , Al 2 O 3 , and K 2 O percentage in the coal, suggesting that the ∑REEs concentrations in coal are mainly controlled by input of land-derived detritus. There is an overall increasing trend in ∑REEs content upward through the coal seam.

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A preliminary study of mineralogy and geochemistry of four coal samples from northern Iran

Cited by 41 publications

References 25 publications

Geochemical and environmental baseline of major and trace elements in Zarand coals, southeastern Iran

Geochemical and environmental baseline of major and trace elements in Zarand coals, southeastern Iran

Mineralogical and Geochemical Characteristics of Late Permian Coals from the Mahe Mine, Zhaotong Coalfield, Northeastern Yunnan, China

Rare earth element geochemistry of coals from the Mazino Coal Mine, Tabas Coalfield, Iran

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