Search

Search

Sort results:

Results : 61 - 70 of 555

BUL 005

Air Photographs of Alberta

Air Photographs of Alberta The Plains Region, parts of the Mountains and Precambrian Shield, as well as the Foothills, is photographed in this depiction of aerial photographs. The basic principle of this report is to provide accurate information ... Show Abstract

Gravenor, C.P.  Green, R.  Godfrey, J.D.  1960-01-01

BUL 041

The Composition of Recent Alluvial Gravels in Alberta River Beds

A large data set of grain-size distributions and lithologic composition is presented for bed material in 12 Albertan rivers over a total sampled length of 7 500 km. Eight grain-size parameters are estimated from the sample distributions (i.e. ... Show Abstract

Shaw, J.  Kellerhals, R.  1982-01-01

BUL 007

Occurence and Stratigraphy of some Gypsum and Anhydrite deposits in Alberta

Triassic gypsum deposits are present at Mowitch Creek and Fetherstonhaugh Creek in the Rocky Mountains north of Jasper.; both these deposits are tentatively correlated with the subsurface Upper Triassic evaporitic Charlie Lake formation of the Peace ... Show Abstract

Govett, G.J.S.  1961-01-01

BUL 050

Petrographic studies of coals from Alberta plains

Abstract: Eleven coal regions in the Alberta plains, identified suitable as feedstock for on-site conversion by liquefaction and pyrolysis, were analyzed for their petrographic composition and rank determination by reflectance analysis. Four lignites, two from Saskatchewan and one each from Texas and North Dakota, were studied for comparison. Petrographically, the eleven subbituminous coals could be divided nto two populations: one with high huminite and liptinite contents 90 percent) and one with substantially lower contents (70 to 75 percent). On a geological formation basis, the average huminite (vitrinite) content in coals from the Horseshoe Canyon Formation (88 percent) was higher compared to coals from the Paskapoo Formation (72 percent). The abundance of semifusinite in coals from the Paskapoo Formation (for example, Highvale and Ardley coals) suggested swamp conditions during the coalification which accelerated oxidation on the accumulating vegetation. The two American lignites showed huminite plus liptinite contents of less than 70 percent while the Saskatchewan lignites were somewhat higher. Reflectance measurements on the subbituminous coals showed a range of 0.36 to 0.47 with a reasonable correlation to the ASTM rank designations of these coals. Reflectivities determined on the lignites were generally lower.To investigate the precise role of different organic coal components in technical processes, maceral concentrates from subbituminous and lignite coals were fractionated by the float-and-sink method using liquids differing in specific gravity. Lighter fractions showed nrichment of huminite and liptinite, but inertinite and mineral atter were in the heavier splits. The chemical composition of pure macerals computed from petrographic analyses of maceral concentrates showed that the huminite macerals were relatively rich in oxygen, whereas the liptinite macerals were relatively rich in hydrogen and the intertinite macerals were hydrogen deficient but relatively rich n carbon. To isolate relatively pure macerals from subbituminous coals, a density gradient centrifugation technique (DGC) was developed to obtain macerals of greater than 90 percent purity. A major limitation of the DGC maceral separation procedure was the mall amount of material obtained in a single DGC run. For maceral eactivity studies, where somewhat larger quantities were needed, multistage float-and-sink tests followed by density gradient centrifugation were suggested for isolating pure macerals from tests in microreactors. To obtain larger quantities of macerals (a few grams), a compromise between quality and quantity was the solution. An examination of the relationship between liquefaction yields and petrographic composition showed a rough positive correlation with huminitic-liptinitic content.In order to follow the progressive alteration and resolidification of coal components during liquefaction, liquefied coal residual materials from both batch autoclave tests and continuous runs were xamined. This examination was based on three main categories: relatively unaltered organic components, thermally altered components (vitroplast, cenospheres, semicoke and granular residue), and norganic components. Microscopic examinations of liquefaction residues from optimum conditions suggested total conversion of liptinite, extensive conversion of huminite and possible partial onversion and reactivity of the semifusinite maceral of the nertinite group. An investigation of coal maceral morphology changes upon progressive hydroliquefaction provided some new insights into the role of different macerals in coal liquefaction in a semiquantitative manner. Because of the extremely complex catalytic ole of mineral matter in coal, it was not possible to predict the liquefaction of a coal from its maceral composition alone. It was not confirmed whether comparative studies of maceral composition and rank ith those of the relevant hydrogenation residues should enable conversion rates and efficiencies to be assessed for the various coals. The assessment of coal hydrogenation performance using microscope techniques might not be very efficient. It appeared essential to pool results from both chemical and microscopic nvestigations to derive a better understanding of the hydroliquefaction process. Place Keywords 72e 72l 72m 73d 73e 73l 73m 74d 74e 82g 82h 82i 82j 82n 82o 82p 83a 83b 83c 83d 83e 83f 83g 83h 83i 83j 83k 83l 83m 83n 83o 83p 84a 84b 84c 84d 84e 84f 84g 84h alberta plains Theme Keywords coal petrography

Parkash, S.  1985-01-01

BUL 019

Geometric Coefficients for use in Numerical Resistivity Analysis

In the direct methods, the solution is arrived at by numerical manipulation of the field data.Ideally, a direct method would lead to a complete three-dimensional picture of the resistivity or conductivity distribution for the subsurface volume or ... Show Abstract

Bukhari, S.A.  Lennox, D.H.  1966-01-01

BUL 035

Contributions to the Hydrogeology of Alberta

Information includes map production procedures, description of reconnaissance maps and description of how the maps were used in the program. The program planned to publish hydrogeological maps of the groundwater conditions and their controlling ... Show Abstract

Toth, J.  Ozoray, G.F.  Wallick, E.I.  Bibby, R.  Gabert, G.M.  Stein, R.  Lytviak, A.T.  1977-01-01

BUL 026

Some Characteristics and Physical Properties of Alberta Tills

Maps depicting the regional variation in the chemical and mineralogical composition, and physical properties of tills from throughout the plains region of Alberta were prepared by a computer with an attached plotter.The chemical constituents and ... Show Abstract

Bayrock, L.A.  Pawluk, S.  1969-01-01

BUL 037

Estimating Sustainable Yield to a Well in Heterogenous Strata

In Alberta, aquifers are heterogeneous, so current methods of predicting sustainable yields are inappropriate. Even the common term transmissivity is not applicable and should be replaced by the new term transmissive capacity, which takes into ... Show Abstract

Bibby, R.  1979-01-01

BUL 002

Part I Lower Cenomanian Foraminifera from Peace River Area, Western Canada Part II Lower Cenomanian Ammonoidea and Pelecypoda from Peace River Area, Western Canada

Part I Lower Cenomanian Foraminifera from Peace River Area, Western Canada Part II Lower Cenomanian Ammonoidea and Pelecypoda from Peace River Area, Western Canada Sixteen species and subspecies of Foraminifera, one of which is named from the Lower ... Show Abstract

Stelck, C.R.  Warren, P.S.  Wall, J.H.  1958-01-01

BUL 062

Industrial Mineral Potential of Alberta Formation Waters

Nearly 130 000 analyses of formation waters from Alberta and adjacent areas were searched for contents of Ca, Mg, K, Br, I and Li exceeding specified regional exploration thresholds. The 5280 analyses meeting these criteria comprise the formation ... Show Abstract

Hitchon, B.  Bachu, S.  Underschultz, J.R.  Yuan, L.P.  1995-01-01

Filtered By

Keyword