By a News Reporter-Staff News Editor at Chemicals & Chemistry -- Researchers detail new data in Minerals. According to news reporting out of Xuzhou, People’s Republic of China, by VerticalNews editors, research stated, “The variations in stress-sensitive minerals and elements in tectonically deformed coals (TDCs) were revealed in this paper. Results show that the clay minerals, carbonates and sulfides in the Middle to Lower Permian TDCs of the no. 8 and no. 10 coal seams of the Zhuxianzhuang mine are dominated by kaolinite, iron dolomite and calcite, and pyrite, respectively.”
Financial support for this research came from National Natural Science Foundation of China.
Our news journalists obtained a quote from the research from the China University of Mining and Technology, “The contents of Th are significantly higher than U, indicating that the sedimentary paleo-environment was almost independent of seawater and was characterized by hypoxia during peat accumulation periods. The light rare earth elements (LREEs) are enriched, yielding (La/Lu)(N) values of 1.00-12.30 and slightly positive Ce anomalies in the no. 8 (0.95-1.44, delta Ce/delta Eu = 1.30-2.62) and no. 10 coal seams (1.02-1.31, delta Ce/delta Eu = 1.66-2.17). The cluster results show that stress-sensitive elements in TDCs can be classified as aggregation-type (Si, Al, Ti, K, Fe, Sc, Li, Rb, Nb, Ag, Cd, Ta, Tl, Bi, Th, U, W), dissipation-type (N, H, Cl, Mo, Ni, Y, Sr), and mutant-type (O, Na, Ca, Be, Mn, Co, Ga, Ge, Pb, Bi, As). The enrichment effects of ductile deformations for major elements are more significant than those of brittle deformations. The combinations of (Nb, U), (Th, Rb), and (Li, Sc, Ag, Ta) are good brittle-, ductile-, and brittle-ductile enrichment-type elements, respectively, which can be used as good indicators of the coal’s tectonic deformation. Sr records higher loss rates in brittle TDCs than in wrinkle coals. The Mo content gradually decreases with increasing tectonic deformation intensity, which is related to the dynamic metamorphism caused by tectonic deformation. Nucleophilic clay mineral elements (Be, Ga, Pb, Ge) in the no. 8 and no. 10 coal seams record similar trends and are highest in scaly coals, indicating that strong shearing effects can promote the enrichment of these elements. The contents of LREE and heavy rare earth elements (HREEs) both increase with the increasing tectonic deformation intensity.”
According to the news editors, the research concluded: “For various TDCs, LREE record higher degrees of fractionation than the HREE.”
For more information on this research see: Variations in stress-sensitive minerals and elements in the tectonic-deformation Early to Middle Permian coals from the Zhuxianzhuang mine, Anhui Province. Journal of Geochemical Exploration , 2018;188():11-23. Journal of Geochemical Exploration can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Geochemical Exploration - http://www.journals.elsevier.com/journal-of-geochemical-exploration/)
Our news journalists report that additional information may be obtained by contacting B. Jiang, China Univ Min & Technol, Minist Educ, Key Lab Coalbed Methane Resource & Reservoir Form, Xuzhou 221116, People’s Republic of China. Additional authors for this research include Y. Song, H.W. Liu, F.L. Li, P. Shao and G.Y. Yan.
The direct object identifier (DOI) for that additional information is: https://doi.org/10.1016/j.gexplo.2018.01.004. This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.
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CITATION: (2018-04-20), Studies from China University of Mining and Technology Yield New Information about Minerals (Variations in stress-sensitive minerals and elements in the tectonic-deformation Early to Middle Permian coals from the Zhuxianzhuang mine, Anhui ...), Chemicals & Chemistry, 3978, ISSN: 1944-1525, BUTTER® ID: 015523129
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