Thermochronological and structural evolution of the Huaibei coalfield in eastern China: Constrains from zircon fission-track data

Tan, Jingqiang; Ju, Yi‐Hsu; Yuan, Wanming; Hou, Quanlin; Pan, Jienan; Fan, Jian‐Jun

doi:10.1016/j.radmeas.2010.11.007

Cited by 18 publications

(8 citation statements)

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“…Tectonically in the southeastern margin of the North China Plate, the formation of the Huaibei coalfield was significantly affected by the Dabie− Tanlu−Sulu orogenic movements. 2,8 Due to the complex tectonic evolution, linear tight folds and imbricate thrusting faults became the main tectonic styles in the study area.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The Dabie−Tanlu−Sulu orogenic movements induced frequent magmation, universally developed faults and folds, and multistages upper imposed basins; these tectonic activities intensively reformed the occurrence of the coal seams. 6,8 A classic North China Plate sedimentary strata distributed in the Huaibei coalfield, including Archaeozoic, upper Proterozoic (Qingbaikou System and Sinian System), Paleozoic (Cambrian System, Ordovician, Carboniferous, and Permian System), Mesozoic (Triassic, Jurassic, and Cretaceous Systerm), and Cainozoic (Palaeogene, Neogene, and Quaternary System). The Permian system (>1300 m in thickness) is the primary coal-bearing strata, and the coal seams are mainly located in the Shanxi formation and lower Shihezi formation (see detailed stratigraphic column of coal-bearing strata in Huaibei coalfield in refs 2 and 3), including about 8−36 coal seams in the 11 coal-bearing measures.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The total coal resource in this coalfield is more than 376 million tons, and the organic matter is mainly type III of kerogen with good gas production potential. The gas content of the coal seams is up to 25 m 3 /t, and the total gas resource is about 3159 million m 3 . − The previous studies in the Huaibei coalfield were mainly focused on coal petrology, sedimentology, and stratigraphy, the tectonic evolution, the distribution features of coalbed methane (CBM), and the geochemical characteristics of trace elements in coal-bearing strata. ,− However, the organic geochemistry characteristics of gas source rocks including coal and coaly mudstone are still not clearly known.…”

Section: Introductionmentioning

confidence: 99%

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Biomarker Study of Depositional Paleoenvironments and Organic Matter Inputs for Permian Coalbearing Strata in the Huaibei Coalfield, East China

Chen

et al. 2017

Energy Fuels

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This study presents detailed information regarding the organic geochemical and biomarker characteristics of the Permian coal-bearing strata in the Huaibei coalfield. The type of organic matter, sources input, depositional paleoenvironments, and thermal maturity are revealed by the organic molecular signatures study. These are of great significance to understand the coalification process and the generation of the coalbed methane. The extractable organic matter (EOM) in coal and coaly mudstone samples are 1.14% and 0.11% on average, respectively (polar compounds > aromatic hydrocarbons > saturated hydrocarbons). The midchain n-alkane (n-C 20 −n-C 24 ) is the dominant fraction for coal (42.33% on average) and coaly mudstone (44.91% on average). Compared to the continental coal-bearing basins, the Pr/Ph ratios (mostly <1.0) of both the coal and coaly mudstone in the Huaibei coalfield are lower. R o (%), Ts/(Ts + Tm), 22S/(22S + 22R) C 31 homohopane, 20S/(20S + 20R) C 27 diasteranes, and the Rock-Eval pyrolysis results demonstrate the organic matter in coals and coaly mudstones is at the mature to postmature stage. The coal-bearing strata were formed in a transitional zone of an open marine and estuarine environment. The interactive deposition of marine and terrestrial sediments in the weak oxidizing−reducing environment was favored for the accumulation of the organic matter and the appearance of multiple coal seams. The organic matter is primarily from terrestrial higher plants mixed with a certain amount of marine sources input for both coal and coaly mudstone. Biodegradation, waterwashing, and thermal maturation are all important factors which would change the distribution of saturated hydrocarbons significantly. As a result, some of the biomarker parameters may lose the meaning to differentiate sources input, depositional environment, and thermal maturity. Hence, the combination of the geological background and the strict screening of these biomarker parameters are very important and indispensable.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biomarker Study of Depositional Paleoenvironments and Organic Matter Inputs for Permian Coalbearing Strata in the Huaibei Coalfield, East China

Chen

et al. 2017

Energy Fuels

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“…The intensive extension can be supported by a Middle‐Late Triassic (235–220 Ma) E‐W trending alkaline magmatic belt more than 1,500 km long widespread in the northern NCC (Zhang, Zhao, Ye, Hou, & Li, ) and the Dishuiyan syenitic‐monzonitic intrusions (shown in Figure ) with an age of 207.6 ± 6.5 Ma (Ying et al, ) or 241 Ma (Shao, Zhang, Mu, Wang, & Guo, ) in north Shanxi, the lamprophyres intrusions (shown in Figure ) with an emplacement age of 229 Ma and cooling ages of 224–198 Ma in Datong of northern Shanxi (Shao & Zhang, ; Shao et al, ), three mafic‐ultramafic intrusions exposed around the Damiao anorthosite complex with an age of 215 Ma in the north‐central margin of the NCC, approximately 25 km north of Chengde, Hebei Province (Zhou & Luo, ), and the Yihe granite‐diorite complex intrusions (Figure ) with ages of 230.3 ± 0.5 Ma (Liu, Corfu, Zeng, & Sun, ). Therefore, Late Triassic intensive extension of the NCC has resulted in a Late Triassic tectonothermal event in the Qinshui Basin and other basins of the NCC, that is, at 213–230 Ma in the Huaibei coalfield of eastern NCC (Tan et al, ), and at 215–195 Ma in the Ordos Basin of the western NCC (Chen et al, ).…”

Section: Discussionmentioning

confidence: 99%

Late Triassic‐Early Jurassic abnormal thermal event constrained by zircon fission track dating and vitrinite reflectance in Xishan coalfield, Qinshui Basin, central North China

et al. 2017

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Xishan coalfield, Shanxi, is located in the northwest of the Qinshui Basin, central North China. It is notable for its varieties of coal rank ranging from high volatile bituminous coals to anthracite as well as having abundant coalbed methane resources. Zircon fission track (ZFT) analyses were carried out on the zircons in 2 Upper Carboniferous and 5 Lower‐Middle Permian sandstones, and vitrinite reflectance of Late Carboniferous and Early Permian coals were measured to determine the timing of thermal events and maximum paleo‐temperatures, which were responsible for coal maturation and coalbed methane generation. Maximum paleo‐temperatures calculated from vitrinite reflectance values reached to about 232 and 223 °C in Late Carboniferous and Early Permian coals, respectively, and the estimated paleo‐temperature gradient was 11.84 °C/100 m, representing an intensive abnormal thermal event. Results of the ZFT dating indicated that 5 samples failed the χ2‐test and 2 samples passed the test. The decomposition results of the 5 samples divided their age populations into 3 periods: (a) older ages (537, 584, and 802 Ma) than sandstones ages, (b) close to or slightly older than their depositional ages (289, 301, and 331 Ma), and (c) younger than the depositional ages (181–215). The 2 samples that passed χ2‐test yield the central ages of 168 ± 7 Ma and 190 ± 8 Ma, respectively, younger than the deposition age. The close to or older ages than the sandstones depositional ages represent the tectonothermal events occurring in their source areas; the younger ages indicate the existence of the postdepositional tectonothermal event. The agreement of the partly annealing temperature zone (210–300 °C) of zircon fission tracks with the calculated maximum paleo‐temperatures from vitrinite reflectance suggests a Late Triassic‐Early Jurassic abnormal thermal event with the formation time of the present coal rank being 181–215 Ma, rather than a unique intrusion at 95–135 Ma on the western margin of coalfield as previously believed. Combined with other ZFT ages regionally, this abnormal event also occurred in the southern as well as the northern parts of the Qinshui Basin. The Late Triassic‐Early Jurassic intensive extension in the North China Craton is the geodynamic setting of this tectonothermal event.

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“…In addition, more than 50% of the total annual industrial Ge production in the world is extracted from Ge-bearing coal deposits . Previous studies have reported that the inventory for Se-bearing coal from coalfields in the eastern-central area of China is much higher, and the total Se emission from coal-fired power plants in Anhui province is as much as 50 ton per annum. , During the past decade, anomalous enrichment of Ga in coal and a few potentially economic Ga-enriched coal deposits were discovered by coal geologists in Jungar Coalfield, Inner Mongolia. ,,, Furthermore, Sun et al proved for the first time that Li is extremely enriched and forms coal-associated Li ore deposits in the Jungar Coalfield, , and they also reported the concentrations of anomalously enriched TREs in the Iqe, Guanbanwusu, and Pingshuo Coalfields. − REY concentration in coal is usually low, but REY can concentrate in coal under some specific geological conditions, which exist especially in Southwest China. − Because of their stable chemical properties during coal combustion, such as higher fusion and boiling point, TREs may primarily accumulate more in ash. Therefore, these findings laid the foundation for TRE extraction from coal and prompted the construction of a pilot plant; as such, TRE enrichment in coal has attracted much attention from the government …”

Section: Introductionmentioning

confidence: 99%

Geochemical Characteristics of Rare-Metal, Rare-Scattered, and Rare-Earth Elements and Minerals in the Late Permian Coals from the Moxinpo Mine, Chongqing, China

et al. 2018

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The rare-metal, rare-scattered (dispersed), and rare-earth elements (TREs) and minerals of the K2 coal from the Moxinpo mine, Chongqing, were analyzed using inductively coupled plasma mass spectrometry and scanning electron microscopy (SEM) with energy-dispersive X-ray spectrometry, respectively. In addition, three-fold geochemical classification of TREs (Li–Be–Rb(Cs)–Sr–Ge–Se–Tl, Zr(Hf)–Nb(Ta)–Ga(In)–Te–Re–Cd, and REY–Sc) was used to determine the vertical distribution. Compared to world bituminous coals, the K2 coal is enriched in Li, Be, Zr, Nb, Hf, Ta, Ga, Se, Cd, In, Te, Re, Sc, and REY elements (except Eu and Tm), especially in Zr, Nb, Ta, Se, Re, and Sc (>5 times). Compared with the upper continental crust, the K2 coal is enriched with REY, and the fractionation of individual light-REY is higher than that of heavy-REY except for few cases. The value of δEu showed a well-pronounced negative anomaly and that of δCe showed a slightly negative anomaly, which indicate that the K2 coal-seam was intermittently affected by seawater. Minerals in the K2 coal are mainly represented by kaolinite, pyrite, and quartz, while rutile, bastnäsite, and xenotime were observed under SEM. The migration, enrichment, and occurrence of TREs in coal are determined by many factors, such as terrigenous rocks, coal-forming microfacies, and paleo vegetation. The correlation analysis showed that rare-metal and rare-earth elements in K2 coal mainly occur in aluminosilicate minerals due to their high correlation coefficients with SiO2 and Al2O3; traces of rare-earth elements mainly occur in bastnäsite and xenotime; and rare-scattered elements (Ge, Se, Cd, In, and Te) are hosted in sulfide minerals (pyrite).

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Thermochronological and structural evolution of the Huaibei coalfield in eastern China: Constrains from zircon fission-track data

Cited by 18 publications

References 24 publications

Biomarker Study of Depositional Paleoenvironments and Organic Matter Inputs for Permian Coalbearing Strata in the Huaibei Coalfield, East China

Biomarker Study of Depositional Paleoenvironments and Organic Matter Inputs for Permian Coalbearing Strata in the Huaibei Coalfield, East China

Late Triassic‐Early Jurassic abnormal thermal event constrained by zircon fission track dating and vitrinite reflectance in Xishan coalfield, Qinshui Basin, central North China

Geochemical Characteristics of Rare-Metal, Rare-Scattered, and Rare-Earth Elements and Minerals in the Late Permian Coals from the Moxinpo Mine, Chongqing, China

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