Petrography and metamorphism of the lower Gondwana (Permian) coal of Rangit Valley, eastern Himalays, India
TL;DR: A triangular outlier of coal-bearing lower Gondwana rocks comprises a tectonic window within the Precambrian metamorphic terrain of the Rangit Valley, in the eastern Himalays of India as discussed by the authors.
About: This article is published in International Journal of Coal Geology.The article was published on 1997-09-01. It has received 11 citations till now. The article focuses on the topics: Coal & Coal mining.
Citations
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TL;DR: In this article, the effect of coal weathering and laboratory (artificial) oxidation on the microscopic appearance of coal, its microstructure as well as coal optical properties is discussed.
43 citations
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TL;DR: Petrological and palynological analyses of coals from two bore-holes, intruded by an igneous body (dolerite dyke), reveal characteristic changes due to thermal alteration.
30 citations
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TL;DR: In this article, the optical anisotropy, optical sign, textural heterogeneity and deformational features of the maceral grains along with the Raman spectral characteristics of the seven coal samples collected from the Himalayan fold-thrust belts of Sikkim State, India.
17 citations
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TL;DR: In this article, the microstructural framework of coals from the Raniganj and the Jharia Basins as well as from the Himalayan fold-thrust belts of Sikkim, India, by vitrinite reflectance, Raman spectroscopy, Fourier transform infrared, and X-ray photoelectron spectrographs was investigated.
15 citations
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TL;DR: In this article, a detailed characterisation of organic matter type and origin as well as determination of thermal maturity have been carried out on siliciclastic and carbonate sedimentary samples from Paleozoic, Mesozoic and Cenozoic outcrops of the New Siberian Islands, eastern Russian Arctic.
13 citations
References
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TL;DR: The orientation of the optical indicating surface of vitrinite in reflected light has been determined following deformation at 350 and 500°C, confining pressures of 500 and 800 MPa and a strain rate of 10−5 s−1 as discussed by the authors.
59 citations
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TL;DR: A series of coaxial and simple shear deformation experiments designed to constrain the role of shear strain and strain energy in the graphitization process was conducted in this paper.
51 citations
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TL;DR: In this paper, the effect of pressure on the optical properties of cokes from a medium volatile bituminous coal (carbon = 87.9 wt% daf), some carbonized at atmospheric pressure and others under hydraulic pressure (21-310 MPa), over temperatures ranging from 350 to 600 °C at 50 °C intervals, was studied.
38 citations