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TitleSome petrological aspects of the Harbour Coal Seam, Sydney Coalfield, Nova Scotia
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCameron, A R
SourceGeological Survey of Canada, Bulletin 175, 1971, 74 pages (13 sheets), Open Access logo Open Access
PublisherGeological Survey of Canada
Mediapaper; on-line; digital
File formatpdf
ProvinceNova Scotia
NTS11J/04; 11J/05; 11K/01; 11K/08
Lat/Long WENS-60.5000 -59.5000 46.5000 46.0000
Subjectseconomic geology; industrial minerals; chemical analyses; coal; microlithotype analyses
Illustrationscorrelation charts; stratigraphic sections
Released1971 01 01; 2015 12 15
AbstractFacies changes within the Harbour seam of the Sydney coalfield, Nova Scotia, were investigated by megascopic and microscopic methods. The megascopic approach was applied to the laboratory examination of fourteen column samples representing a linear distance of 23 miles in the seam, and to the description of fifty-three in situ sections of the seam in the Princes, Florence, and No. 12 Collieries. The components identified were vitrain, claro-durain, durain , bone, and three varieties of clarain. This part of the study showed that areas of significant changes in petrographic composition could be distinguished laterally and vertically in the seam. Microscopic studies by transmitted light were confined to the dull layers sampled in the Princess Colliery. Compositions were determined by both maceral and microlithotype content. In this process the microlithotype concept, as conventionally used, was revised to more clearly define natural assemblages of macerals. Two orders of microlithotypes were distinguished: simple and complex. Sixty simple and nine complex types have been defined. On the basis of the megascopic and microscopic data, the writer concludes that much of the Harbour seam originated under forested-moor and reed-moor conditions. Deviations from these conditions are represented by the dull bands, one group of which appears to have originated during flooding or excessive subsidence. A second group is interpreted to be the product of short-lived dry periods, and a third group appears to represent a transitional phase between the reed moor and open water.

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