Micrinite in Southern Hemisphere sub-bituminous and bituminous coals : redefined as fine grained kaolinite
Faraj, Basim S. M. & Mackinnon, Ian D. R. (1993) Micrinite in Southern Hemisphere sub-bituminous and bituminous coals : redefined as fine grained kaolinite. Organic Geochemistry, 20(6), pp. 823-841.
A range of complementary analytical techniques including SEM/EDS, TEM/EDS and conventional optical microscopy has been rigorously applied to precisely defined areas of micrinite in polished coal samples from Australia and New Zealand. Elemental analyses of micrinite regions showed a high abundance of Al, Si and O and high resolution images of micrinite revealed a grain size < 1μm. Electron diffraction and elemental analyses from individual grains within the optically and electron-optically correlated micrinite regions are consistent with the occurence of fine-grained kaolinite. The optical properties of "dark clay" and "micrinite" (i.e. fine-grained kaolinite) can be understood in terms of the diffuse scattering of visible light from the surfaces of materials with different grain sizes in single-phase or multi-phase mixtures.
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|Item Type:||Journal Article|
|Additional Information:||GeoRef, Copyright 2009, American Geological Institute.
|Keywords:||bituminous coal, clay minerals, coal, exinite, grain size, inertinite, kaolinite, macerals, micrinite, optical properties, organic residues, reflectance, sedimentary rocks, SEM data, sheet silicates, Southern Hemisphere, subbituminous coal, TEM data, vitrinite|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOCHEMISTRY (040200) > Organic Geochemistry (040204)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Petroleum and Coal Geology (040309)
|Divisions:||Current > Institutes > Institute for Future Environments|
|Deposited On:||31 Jan 2013 06:17|
|Last Modified:||31 Jan 2013 06:17|
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