maceral

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Related to Macerals: coal petrology

maceral

[¦mas·ə¦ral]
(geology)
The microscopic organic constituents found in coal.
References in periodicals archive ?
Maceral analysis was performed employing a single-scan method [18], with a Leica MPV microscope using reflected white and fluorescent light.
Organic matter in the topsoil layer is represented by macerals from the vitrinite-, secondary inertinite- and liptinite groups.
Most of the difficulties associated with coal utilization arise from inorganic mineral matter rather than maceral composition.
Xinqian et al (2002) found differences between the properties of vitrinite and inertinite which rise to the possibility of separating single macerals by flotation process, Sarkar (1984).
Reflectance of vitrinite-like macerals as a thermal maturity index in the Cambrian-Ordovician Alum Shale, southern Scandinavia: AAPG Bulletin, 74, 394-406.
Generally, softness of coal increases with increasing vitrinite content and decreasing micronite and liptinite macerals.
2003, The variation of structural characteristics of macerals during pyrolysis, Fuel, Vol.
Hydrocarbon-generating macerals of Paleogene organic source rocks in Huangxian Basin.
Major mode of occurrence of chlorine in coal, as distinct from sulphur, is chloride anions in moisture anchored to the surface of micropores in coal macerals by organic ionic complexes, such as quaternary amine groups and alkali carboxyl complexes.
Such methods are laser micropyrolysis of macerals [9-10], microscopy for visualization of coals [11-14] and FT-IR spectroscopy of kerogen [15].
Of kerogen macerals and soluble organic matter, the abundant amorphous body and algae are important sources of organic matter (Fig.
Macerals characteristics of black argillite from Paleozoic marine-continental transitional facies and evaluation on their gas-generating potentiality // Acta Sedimentologica Sinica.