Matter Composition and Two Stage Evolution of a Liangshan Super High-Sulfur Coal Seam in Kaili, Eastern Guizhou

Yi, Tongsheng; Qin, Yong; Zhang, Jing; Wu, Yuchen; Li, Zhuangfu

doi:10.1016/s1006-1266(07)60063-7

Cited by 5 publications

(7 citation statements)

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“…The percentage content of three components such as Al 2 O 3 +SiO 2 , CaO+MgO, Fe 2 O 3 +SO 3 in the coal ash composition was used as the three terminal elements for the triangular diagram (Figure 10). The data points displayed are close to the terminal element of “Al 2 O 3 +SiO 2 ”, which reflects the terrigenous sediment source with high clay mineral content and weak deoxidized environment of coal accumulating near the terrigenous facies (Yi et al., 2007).…”

Section: Discussionmentioning

confidence: 63%

“…Thus, the variation of ash content in coal is related to the paleogeographical environment of sedimentary period, which can be one of the auxiliary factors for depositional environment. The gray component index (Fe 2 O 3 +CaO+MgO)/(SiO 2 +Al 2 O 3 ) was used as the discriminant parameter of the coal accumulating environment (Yi et al., 2007; Dai et al., 2005). The Linhua coal mining field was indicated to be anoxia and weak reducing environment according to gray component index changed from 0.12 to 0.38.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of coal and shale reservoir in Permian coal-bearing strata for development potential: A case study from well LC-1# in the northern Guizhou, China

Sang

Yang

et al. 2018

Energy Exploration & Exploitation

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Indentifying reservoir characteristics of coals and their associated shales is very important in understanding the co-exploration and co-production potential of unconventional gases in Guizhou, China. Accordingly, comprehensive experimental results of 12 core samples from well LC-1# in the northern Guizhou were used and analyzed in this paper to better understand their vertical reservoir study. Coal and coal measured shale, in Longtan Formation, are rich in organic matter, with postmature stage of approximately 3.5% and shales of type III kerogen with dry gas generation. All-scale pore size analysis indicates that the pore size distribution of coal and shale pores is mainly less than 20 nm and 100 nm, respectively. Pore volume and area of coal samples influenced total gas content as well as desorbed gas and lost gas content. Obvious relationships were observed between residual gas and BET specific surface area and BJH total pore volume (determined by nitrogen adsorption). For shale, it is especially clear that the desorbed gas content is negatively correlated with BET specific surface area, BJH total pore volume and clay minerals. However, the relationships between desorbed gas and TOC (total

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Evaluation of coal and shale reservoir in Permian coal-bearing strata for development potential: A case study from well LC-1# in the northern Guizhou, China

Sang

Yang

et al. 2018

Energy Exploration & Exploitation

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“…There is a discernible directional variation in Ga concentration, with higher concentrations observed in the northwest and southeast regions of the mining area, and lower concentrations in the southwest and northeast regions. In the exploration area, the Ga concentrations within the 6-1 coal seam vary from 1 to 41 µg/g, averaging 19.02 µg/g, with higher concentrations in the northern and southern regions and lower levels in the central area. In the 6-2 seam, the Ga concentrations range from 0 to 36 µg/g, averaging 23.89 µg/g, predominantly higher in the eastern region but lower in the northern and central regions.…”

Section: Plane Of Ga Depositmentioning

confidence: 99%

“…Coal, as a unique sedimentary deposit, not only serves as fuel but also harbors coal-type strategic metal deposits [10][11][12]. The 2006 discovery of an exceptionally large Ga-enriched coal deposit in the Inner Mongolia Jungar Coalfield has illuminated the metallogeny of dispersed elements, such as Ga, positioning the study of coal-Ga resources at the forefront of research [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. This has led to the identification of several coal-Ga deposits ranging from medium to super-large sizes, and the Ga resource ranges from 400 to over 2000 t [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Exploration Model of Coal–Gallium Deposit: A Case Study of the Heidaigou Coal–Gallium Deposit in the Jungar Coalfield, Inner Mongolia, China

Zhang,

Wei,

Cao

et al. 2024

Minerals

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Gallium (Ga) is a typical scattered trace element that is irreplaceable in strategic sectors such as national defense, wireless communications, new materials, renewable energy, and healthcare. The coal–Ga deposit is an important complement to traditional Ga resources and has become a significant focus for Ga mineral resource exploration. Therefore, there is an urgent need to research the coal–Ga cooperative exploration model from both technical and economic perspectives. Taking the Heidaigou coal–Ga deposit as an example, the enrichment zone of coal–Ga is predominantly situated in the northern part of the exploration area, adjacent to the fault zone. The Ga concentration demonstrates a gradual decline from the north–central region towards the northeast and southeast. Similar vertical Ga distribution patterns are observed in adjacent drillings, with notably higher concentrations in the roof, floor, and parting layers. The cooperative exploration model for coal–Ga deposits is proposed based on the above features. The model employs a comprehensive set of cooperative technical methods, such as remote sensing, geological mapping, seismic exploration, drilling, petrogeochemistry, and well logging. The layout of exploration engineering and the concentration of Ga provide the basis for the estimation of Ga resources. Additionally, the model provides an important scientific basis for the improvement of the strategic coordination ability of Ga mineral resources.

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“…Vertically, the content of each major element does not significantly change, indicating that the input of terrigenous debris and plant organic matter was relatively continuous and stable during the deposition process. Tanking the percentages of CaO + MgO, Fe 2 O 3 + SO 3 and SiO 2 + Al 2 O 3 as three endmembers into the triangular endmember diagram to discriminate the sedimentary environment [48] (Figure 5), it can be seen that the oil shale samples in the Tanshan area are all close to the SiO 2 + Al 2 O 3 endmembers, reflecting that the types of terrigenous material represented by quartz and clay minerals, which are deposited in a stable environment with relatively strong hydrodynamic conditions [48,49].…”

Section: Element Geochemical Characteristics 431 Major Elements and C...mentioning

confidence: 99%

Geochemistry of the Tanshan Oil Shale in Jurassic Coal Measures, Western Ordos Basin: Implications for Sedimentary Environment and Organic Matter Accumulation

Tao

Hai

et al. 2022

Energies

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The Tanshan area is located in the southern section of the west margin of the Ordos basin. The Middle Jurassic Yan’an Formation is relatively thick and rich in coal and oil shale layers, having positive potential for energy development. In order to explore the sedimentary environment of oil shale and the controlling factors of organic matter accumulation, 18 oil shale samples collected from two boreholes (Guyou-3 and Guyou-4) in the Tanshan area were selected as the research objects, and organic geochemical and elemental geochemical tests were carried out systematically. The results show that oil shales have the characteristics of medium oil content, medium ash, high calorific value, low sulfur and low maturity stage, which constitutes good hydrocarbon generation potential. The organic matter is mainly humic type, resulting from terrigenous debris and higher plant debris. The indictors of C-value (mean 81.90), Th/U ratio (mean 3.44), CaO/(MgO·Al2 O3) ratio (mean 0.07), δEu (mean 0.71), δCe (mean 1.15), V/(V + Ni) ratio (mean 0.79), Ceanom index (mean −0.04), Babio index (mean 488.97 μg/g), P/Ti ratio (mean 0.08), TOC/S ratio (mean 59.80), Sr/Ba ratio (mean 0.57) and (La/Yb)N ratio (mean 14.71) indicate that Tanshan oil shales were formed in a warm–humid climate and anoxic-reducing environment, with a low-salinity water body and a low deposition rate but also a relatively low initial paleoproductivity. Paleoclimate conditions, organic matter sources and redox properties of paleowater are the main controlling factors affecting the accumulation of organic matter in oil shales. Although low paleoproductivity and deposition rates are not conducive to the preservation of organic matter, under the conditions of warm and humid climate and a reducing water environment, the continuous and stable input of terrigenous debris and higher plant debris can also cause the enrichment of organic matter.

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Matter Composition and Two Stage Evolution of a Liangshan Super High-Sulfur Coal Seam in Kaili, Eastern Guizhou

Cited by 5 publications

References 1 publication

Evaluation of coal and shale reservoir in Permian coal-bearing strata for development potential: A case study from well LC-1# in the northern Guizhou, China

Evaluation of coal and shale reservoir in Permian coal-bearing strata for development potential: A case study from well LC-1# in the northern Guizhou, China

Cooperative Exploration Model of Coal–Gallium Deposit: A Case Study of the Heidaigou Coal–Gallium Deposit in the Jungar Coalfield, Inner Mongolia, China

Geochemistry of the Tanshan Oil Shale in Jurassic Coal Measures, Western Ordos Basin: Implications for Sedimentary Environment and Organic Matter Accumulation

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