Analytical variation in Australian coals related to coal type and rank

Suggate, R. P.

doi:10.1016/s0166-5162(98)00007-x

Cited by 27 publications

(12 citation statements)

References 7 publications

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“…New Zealand data are amplified by two sets of Neogene Victorian brown coals, from Yallourn and Morwell opencuts (George 1975). The lower hydrogen, lower VM lithotypes from these Victorian lignites are similar to New Zealand lignites (Suggate 1998a), from which higher hydrogen, higher VM lithotypes have not been isolated. Comparable, but not so extreme, type variation was documented by Kiss (1982, fig.…”

Section: Isorank Lines For New Zealand Coalsmentioning

confidence: 72%

“…Newman & Newman 1982). An increase in liptinite produces a comparable effect, as in Victorian Neogene brown coals (Suggate 1998a). In older Australian coals (Suggate 1998a), an increase in inertinite results in a decrease in VM with increase in CV.…”

Section: Theoretical Consideration Of Variation In Maceral Group Contentmentioning

confidence: 81%

“…Other Cenozoic coals include the brown coals of Victoria, Australia, which, apart from minor high-hydrogen lithotypes, show a slightly smaller range of H/C than New Zealand low-rank coals but plot within the New Zealand Coal Band (Suggate 1998a Carboniferous Coal Band problematical. Figure 4 shows partial coal bands on O/CThe Carboniferous coals from Europe and North America H/C axes for Northern Hemisphere Carboniferous coals, provide a coal band in the bituminous and higher rank range, Figure 4A shows low ash, low sulphur Carboniferous but its extension through the subbituminous to peat range is (Pennsylvanian) North American coals reported by Parks & O 'Donnell ( 1946), and the coal band based on the data points for North American coals (>82% C only, these being dominantly Pennsylvanian) from Mott (1948); the coal band is drawn closer to the data points than was that of Mott.…”

Section: Other Cenozoic Coalsmentioning

confidence: 99%

“…In a comprehensive study of analytical variations in Australian coals, Suggate (1998a) showed that partial coal bands for Permian coals could be broadly related to vitrinite content. In summary: high vitrinite coal and vitrains plot within the New Zealand Coal Band; medium-high vitrinite coals plot across the low hydrogen, low VM limit of the band (cf.…”

Section: Australian Coal Bandsmentioning

confidence: 99%

“…Comparable, but not so extreme, type variation was documented by Kiss (1982, fig. 1, 2) for two seams in Narracan bore 3372 (Suggate 1998a). While New Zealand coals provide a large dataset for the higher hydrogen coals, none of these are cannel coals, which have both higher CV and VM and higher hydrogen and carbon than normal coals.…”

Section: Isorank Lines For New Zealand Coalsmentioning

confidence: 99%

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The Rank(S_r) scale: Its basis and its applicability as a maturity index for all coals

Suggate

2000

New Zealand Journal of Geology and Geophysics

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A comprehensive revision of the basis of the 1959 Rank(S) scale of Suggate uses the van Krevelen diagram (axes of atomic O/C and H/C), and a complementary diagram with axes of calorific value and volatile matter, to demonstrate the progress of rank increase in coals of differing coal types. Both type and rank (maturity) are significant in hydrocarbon generation. The Late Cretaceous and Cenozoic New Zealand coals, which have an almost complete rank range from peat to semi-anthracite, are used to exemplify medium to high hydrogen coals, and Paleozoic coals from the Northern Hemisphere and Australia provide data for lower hydrogen coals. A line of progressive coalification of "average-type" coal, which typifies that of Type III kerogen, is identified. Systematic analytical variation in isorank coals allows the determination of the pattern of isorank lines on the diagrams. These lines are then spaced to provide a scale of equal increments of rank increase, which is accepted as being dependent on temperature at the time of maximum burial. The 1959 supposition that geothermal gradients did not vary widely between subsiding basins is abandoned, and in its place it is now assumed that the geothermal gradient in each basin was uniform with depth. The spacing of isorank lines to provide the Rank(S r ) scale, which ranges from 0 in peat to >20 in anthracite, follows study of individual sequences in deep coalfield boreholes and in oil exploration wells.

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Section: Isorank Lines For New Zealand Coalsmentioning

confidence: 72%