Depositional setting and coal petrology of Tulameen coalfield, south-central British Columbia
Journal Article
·
· Am. Assoc. Pet. Geol. Bull.; (United States)
OSTI ID:5603957
- Univ. of British Columbia, Vancouver
The Tulameen coalfield of south-central British Columbia lies in an open-folded, south-southeast plunging syncline within the Cordilleran intermontane belt. Several seams of coal are present within the middle member of the Allenby Formation (Princeton Group) of Eocene age. The upper, or main, coal seam, about 15 to 21 m thick, is exposed on the southwestern limb of the syncline where it is relatively undisturbed by structural deformation. The coal is predominantly vitrain and clarain and is composed of more than 90% vitrinite. Vitrinite reflectance increases from 0.62% in the north to 0.86% in the south but shows no significant vertical variation. Coal rank ranges from high-volatile C to high-volatile B bituminous. Clean coal has 14% ash (mostly kaolinite and quartz) and is low in sulfur. The number of interbedded bentonite, mudstone, and shale partings decreases from north to south. These partings are rich in smectite and/or kaolinite. Macerals in the coal suggest that the coal-forming peat accumulated in a predominantly forest-moor-swamp environment. Similarities in other floras of the same age in the western Cordillera indicate that equitable climates were widespread and that the Coast Mountains and Cascade Range were much lower than at present. An abundance of tephra and bentonite indicates that volcanic activity was contemporaneous with coal and sediment deposition. 43 references, 5 figures, 2 tables.
- OSTI ID:
- 5603957
- Journal Information:
- Am. Assoc. Pet. Geol. Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol. Bull.; (United States) Vol. 63:11; ISSN AAPGB
- Country of Publication:
- United States
- Language:
- English
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Kaolinite, smectite and K-rectorite in bentonites: relation to coal rank at Tulameen, British Columbia
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Mon Dec 31 23:00:00 EST 1979
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OSTI ID:5243997
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· Geol. Soc. Am., Bull.; (United States)
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OSTI ID:6659208
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Conference
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Sat Mar 31 23:00:00 EST 1984
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:6577059