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TitleGeology and structure of the Yellowknife Greenstone Belt, District of Mackenzie
AuthorHenderson, J F; Brown, I C
SourceGeological Survey of Canada, Bulletin 141, 1966, 38 pages (1 sheet), (Open Access)
PublisherGeological Survey of Canada
MapsPublication contains 1 map
Map Info.geological, 1:12,000
Mediapaper; on-line; digital
RelatedThis publication contains Henderson, J F; Brown, I C; (1967). Geology, Yellowknife Greenstone Belt, District of Mackenzie, Geological Survey of Canada, "A" Series Map no. 1193A
File formatpdf
ProvinceNorthwest Territories
NTS85J/08; 85J/09
AreaYellowknife; District of MacKenzie
Lat/Long WENS-114.0000 -113.0000 49.5000 49.0000
Subjectsregional geology; structural geology; economic geology; bedrock geology; lithology; andesites; basalts; diorites; gabbros; gold; pillow lavas; structural analyses; structural features; shear zones; faults; Akaitcho Fault; Campbell Shear Zone; Con Shear Zone; Giant Shear Zone; Kam Fault; Martin Fault; Negus Fault; Negus-rycon Shear Zone; Pud Fault; Townsite Fault; West Bay Fault; Yellowknife Group; Yellowknife Greenstone Belt; Precambrian
Illustrationsaerial photographs; sketch maps; photographs; tables; diagrams
Released1966 01 01; 2015 07 22
AbstractIn this bulletin an attempt is made to evaluate the application of a geochemical method for locating oil and gas fields in Canada. The Innisfail and Pincher Creek fields in Alberta and the Gobles and Colchester fields in southwestern Ontario were chosen for study. Of the numerous geochemical techniques available the author chose soil sampling from a depth of 8 feet with subsequent extraction and determination of the gaseous hydrocarbons ethane, propane, butanes, and pentanes as being the most direct and reliable prospecting procedure. Reproduction of the sampling technique and repetition of the analytical techniques appear to be within acceptable limits. Factors that may cause erroneous results include variations in soil type and uneven topography, and the writer recommends that surveys be restricted to areas in which adverse factors contribute minimum errors rather than to attempt to apply corrections to results obtained in unsuitable areas. The presence of deep glacial deposits at the surface and of large amounts of hydrocarbons distributed through the sediments above the oil and gas pools does not seem to have an unduly adverse effect on the results. Geochemical anomalies appear to be associated with all the fields studied with anomaly intensity roughly proportional to productivity. Each of the "halo" and "solid" types of anomalies can be recognized. The writer concludes that the geochemical method can be a valuable addition to the usual geological and geophysical exploration methods if used under favourable circumstances.