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Coal maceration

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Journal Article
Published: 01 October 1964
Micropaleontology (1964) 10 (4): 486-490.
...Howard W. Lee Abstract Selection and proper execution of the best-suited maceration method are key factors in palynological studies. Household bleach, HNO 3 , and KOH used in successive steps, with application of moderate heat and vigorous agitation during each step, successfully macerate some...
Series: GSA Special Papers
Published: 01 January 1993
DOI: 10.1130/SPE286-p63
... Analyses of modern Indonesian peat samples reveal that the optical characteristics of peat constituents are consistent with the characteristics of macerals observed in brown coal and, as found by previous workers, brown-coal maceral terminology can be used in the analysis of modern peat. A core...
... subsidence with early burial of peat beds is indicated for Sydney basin, by type of clastics and excellent preservation of coal macerals. In the Pictou coalfield, micro-banded hypautochthonous coals accumulated in a narrow intermontane lake basin. A lithofacies map shows lacustrine sediments, with coal...
Journal Article
Published: 01 January 1968
Micropaleontology (1968) 14 (1): 97-104.
...Elsie Louise Darrah Abstract A study of Pennsylvanian petrified seeds and seedlike megaspores has revealed new information on the structure of the megaspore membrane and associated tissues, and has provided characteristics useful for identifying seed fragments released from coals and shales...
Journal Article
Journal: Economic Geology
Published: 01 April 1995
Economic Geology (1995) 90 (2): 246-254.
...Donald D. Hickmott; W. S. Baldridge Abstract Proton-induced X-ray emission (PIXE) microanalysis is shown to be capable of semiquantitative to quantitative standardless determination of trace element abundances in coal macerals and sulfides using an internal normalization protocol. PIXE spectra...
Journal Article
Published: 01 August 2017
Environmental and Engineering Geoscience (2017) 23 (3): 191-207.
.... (2015) . Coal measure strata intruded by igneous rock can be found in many coalfields worldwide. Igneous intrusion activity changes the properties of the coal, such as their petrographic, maceral, and geochemical properties, resulting from the thermal effects associated with the intrusions...
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Journal Article
Journal: Economic Geology
Published: 01 December 1963
Economic Geology (1963) 58 (8): 1347-1348.
Journal Article
Journal: Economic Geology
Published: 01 May 1963
Economic Geology (1963) 58 (3): 347-352.
...M. M. Roy Abstract Chromatographic, infrared, and other analytic data for vitrinite, fusinite, and exinite concentrates from samples of abnormally high-sulfur Tertiary coals of Assam (India) are presented and compared with similar data for normal (coking) coals from the Jharia field. GeoRef...
Journal Article
Published: 01 June 1987
Journal of the Geological Society (1987) 144 (3): 513-517.
... is thought to be due to preferential preservation of the unique exocuticle of scorpions; it alone is preserved and appears to retain an organic nature. The cuticle is recovered from all the lithotypes of humic bituminous coals although it is most common in coals rich in inertinite macerals. From the present...
Journal Article
Journal: Economic Geology
Published: 01 September 1965
Economic Geology (1965) 60 (6): 1213-1217.
...M. M. Roy Abstract Coal macerals were exposed to blown air at a temperature of 175 degrees C for different periods of time up to 500 hours. In vitrinite and exinite, the drop in percentage of carbon and hydrogen increases up to 300 hours, but in fusinite the drop is negligible. GeoRef, Copyright...
Journal Article
Journal: GSA Bulletin
Published: 01 October 1997
GSA Bulletin (1997) 109 (10): 1231-1248.
...Carol B. de Wet; Stephen O. Moshier; James C. Hower; Andrew P. de Wet; Sean T. Brennan; Charles T. Helfrich; Anne L. Raymond Abstract Two cyclothems contain an unusual suite of disrupted fabrics. This study's interdisciplinary integration of coal maceral and sedimentological information offers...
Journal Article
Published: 01 February 1986
Canadian Journal of Earth Sciences (1986) 23 (2): 254-258.
...Fariborz Goodarzi Abstract The "Mammoth" coal seam in southeastern British Columbia, Canada, was structurally thickened to 100 m as a result of Laramide folding and faulting. Samples from the coal seam, examined using reflected-light microscopy, include thermally altered coal macerals...
Journal Article
Journal: Geology
Published: 01 April 2003
Geology (2003) 31 (4): 303-306.
... in the relative proportions of vitrinite to inertinite, two environmentally sensitive coal macerals, reveals several characteristic frequencies, some of which display evidence of amplitude modulation every five to six cycles. Combining this observation with depositional time limitations derived from present-day...
FIGURES
Journal Article
Journal: Economic Geology
Published: 01 October 1982
Economic Geology (1982) 77 (6): 1592-1597.
... complexes. Gallium was reported to occur in coal macerals as colloidal inorganic compounds. The strong correlation between platinum and iron and low-temperature ash suggest that platinum may be absorbed and retained as similar colloidal inorganic compounds. The inverse correlation between gold and platinum...
Series: GSA Memoirs
Published: 01 January 1995
DOI: 10.1130/MEM185-p353
... from coal macerations and thin sections in 1913. The Pollen Analysis Circular brought workers with dual interests in Holocene and ancient spore/pollen analyses into contact in the 1940s and generated interest in older fossils. Two umbrella organizations—the Paleobotanical Section of the Botanical...
Journal Article
Journal: Geology
Published: 01 April 1981
Geology (1981) 9 (4): 165-168.
...James C. Hower; Alan Davis Abstract The anisotropy of the coal maceral vitrinite was analyzed in relation to the tectonic setting of a coal from the Southern Anthracite Field in Pennsylvania. For the coal studied, the maximum-intermediate reflectance plane essentially paralleled the axial plane...
Journal Article
Published: 01 March 1991
Bulletin de la Société Géologique de France (1991) 162 (2): 211-217.
Series: Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2003.207.01.10
EISBN: 9781862394896
.... Her contributions on the earliest angiosperms, on the formation of coal-balls, and, above all, on the nature and terminology of coal macerals have had a lasting impact on palaeobotanical thought. Marie Stopes has been aptly described as one of the 20th century’s most remarkable women ( Hall 1977...
Journal Article
Journal: Economic Geology
Published: 01 August 1965
Economic Geology (1965) 60 (5): 972-979.
...M. M. Roy Abstract "The I. R. spectra of macerals show that the general nature of the spectra are more or less similar in higher rank coals and somewhat different in the lower ranks. Presence of H-bonded (OH), H-bonded (C=O) or polycyclic extended quinones are prominent with vitrinites. Exinites...
Journal Article
Journal: Geophysics
Published: 24 June 2013
Geophysics (2013) 78 (4): D237-D248.
... and the higher the MC of the coal. Furthermore, because pores in a coal are void space filled with either water or gas and the density of either water or gas is significantly smaller than that of either macerals or minerals, the larger the porosity, the smaller the density of the coal. Thus, the same reasoning...
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