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REP 75

Middle Albian Foraminifera from Athabasca and Peace River Drainage Areas of Western Canada

Fifty-nine species and subspecies of Foraminifera, of which ten are new, from the Clearwater, Grand Rapids and Joli Fou formations of the lower Athabasca drainage and from the lower part of the Fort St. John Group of the upper Peace River area are ... Show Abstract

Stelck, C.R.  Wall, J.H.  Bahan W.G.  Martin L.J  1956-01-01

BUL 040

The Effects of Surface Mining of Coal on Water Chemistry near Grande Cache, Alberta

Abstract: Streams and springs in and near surface coal mines located on the eastern slopes of the Canadian Rocky Mountains were sampled between 1972 and 1978. Dominant ions in streams unaffected by mining activity characteristically are calcium, magnesium, and bicarbonate. Total dissolved solids concentrations usually range between 125 and 231 g/L. Sulfate is usually about 20 percent of the anions and has a concentration less than 75 mg/L. Relative amounts of sodium, potassium, chloride, and nitrate are less than 6 percent of the ions. pH ranges between 7.6 and 8.2.The effects of mining activity on water quality vary in intensity, but follow a consistent pattern. The relative proportions of the various cations do not change, although their concentrations may rise to 4 times those of background values. The concentration of anions lso increases, with a shift in the relative proportions from bicarbonate to sulfate and, at the more strongly affected sites, to nitrate. pH is not significantly different from unaffected sites.Enhanced oxidation of sulfide minerals, which account for less than about 0.07 percent of the loose, unsaturated spoil piles, is probably responsible for the increase in sulfate ions. The hydrogen ion produced during the oxidation of the sulfide minerals is consumed in the dissolution of the abundant carbonate minerals thus releasing calcium and magnesium. Concentrations of nitrate increase from the use of ammonium nitrate for blasting.The estimated rate of chemical denudation at sites unaffected by mining activity ranges from 4 to 18 mg/sec-ha. The rate at affected sites varies from 4 to 55 mg/sec-ha.Concentrations of iron, manganese, lead, and copper occasionally exceed drinking water standards regardless of the influence of mining and do not appear to be increased by that activity. Zinc, strontium, and mercury concentrations may increase as a result of mining ctivity, but the evidence is not conclusive and concentrations are well below drinking water standards. Place Keywords 83l alberta grande cache Theme Keywords coal lower cretaceous surface mining water chemistry

Hackbarth, D.A.  1980-01-01

BUL 046

Oil Sands Geology - Athabasca Deposit North

In the western part of the study area, significant reserves occur in laterally extensive marine bar sands at the top of the McMurray formation and at the base of the overlying Clearwater Formation.The McMurray Formation was deposited in a ... Show Abstract

Flach, P.D.  1984-01-01

BUL 021

Stratigraphy and Petrology of the Lower Cretaceous Blairmore and Mannville Groups, Alberta Foothills and Plains

The upper unit consists of lensing, grey, siliceous sandstone, siltstone, and varicoloured shale, grading up in the southernmost Foothills into a thick succession of bedded pyroclastic detritus (Crowsnest Member ).These beds grade laterally in the ... Show Abstract

Mellon, G.B.  1967-01-01

BUL 028

Lower Cretaceous Microfloras of the Peace River Area, Northwestern Alberta

The rocks comprise a succession of interbedded shaly and arenaceous units of predominantly marine origin, encompassing the upper part of the Loon River Formation, the Peace River Formation Notikewin, Harmon, Cadotte, and Paddy Members), and the ... Show Abstract

Singh, C.  1971-01-01

BUL 015

Microflora of the Lower Cretaceous Mannville Group, East-Central Alberta

Three cored sections of the Lower Cretaceous Mannville Group from the subsurface of east-central Alberta were sampled for their microfloral content. The microflora recovered contains 53 genera and 120 species of microspores and pollen, 10 genera ... Show Abstract

Singh, C.  1964-01-01

OFR 1988-10

Sedimentation and Deformation of Lower Cretaceous Strata of the Cadomin-Luscar Coal Field, Alberta

The objective of this field trip is to examine Lower Cretaceous coal-bearing rocks of the Rocky Mountain Foothills in the Cadomin-Luscar area of central Alberta. Participants will have an opportunity to observe at first hand the lithology and ... Show Abstract

Langenberg, C.W.  MacDonald, D.E.  Kalkreuth, W.D.  1988-01-01

OFR 1983-16

Structural and Sedimentological Framework of Lower Cretaceous Coal-Bearing Rocks in the Grande Cache Area, Alberta

Structural and Sedimentological Framework of Lower Cretaceous Coal-Bearing Rocks in the Grande Cache Area, Alberta Place Keywords 83e 83f alberta canada grande cache Theme Keywords coal lower cretaceous sedimentological framework structural ... Show Abstract

Langenberg, C.W.  1983-09-01