2005 Salt Lake City Annual Meeting (October 16–19, 2005)

Paper No. 10
Presentation Time: 8:00 AM-12:00 PM


EVENCHICK, Carol A.1, STASIUK, Lavern D.2, OSADETZ, Kirk G.2, O'SULLIVAN, Paul B.3, FERRI, Fil4, MUSTARD, Peter S.5, LOWE, Carmel6, ENKIN, Randy J.6, MCMECHAN, Margot E.2 and MCNICOLL, Vicki J.7, (1)Geological Survey of Canada, 101-605 Robson ST, Vancouver, BC V6B 5J3, Canada, (2)Geological Survey of Canada, 3303 - 33rd Street NW, Calgary, AB T2L 2A7, Canada, (3)Apatite To Zircon, Inc, Viola, ID 83843-9316, (4)BC Ministry of Energy and Mines, 6th Floor, 1810 Blanchard Street, Victoria, BC V8W 9N3, Canada, (5)Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada, (6)Geological Survey of Canada, Box 6000, 9860 West Saanich Road, Sidney, BC V8L 4B2, Canada, (7)Geological Survey of Canada, Nat Rscs Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada, cevenchi@nrcan.gc.ca

New research on energy resource potential of the frontier Bowser and Sustut basins of the Canadian Cordillera includes geological mapping and a suite of energy resource related thematic studies. The new data and interpretations of thematic studies provide advances on a number of fronts. For example, new apatite fission track thermochronology data are consistent with the regional levels of thermal maturation as defined by vitrinite reflectance studies. The latter indicate highly variable thermal maturity. The northern Bowser Basin and western Sustut Basin are in the early oil to condensate-dry gas generation stage of thermal maturation, making these areas the most prospective for petroleum generation and preservation. Fieldwork and analysis of molecular crude oil samples has led to identification of at least 4 effective petroleum systems in the Bowser and Sustut basins, and has identified sub-Bowser strata as one of the sources. Interpretation of regional potential field data and measurements of density and magnetic susceptibility of rocks from the region provide new information on the depth to basement and possible basement structures. New geological mapping has significantly revised the distribution of lithofacies assemblages of the Bowser Lake Group, and has elucidated structural geometries. Analysis of detrital zircons from sandstone samples from Bowser Basin strata add an additional facet to interpretation of the depositional history of the region. Samples chosen for analysis have depositional ages constrained by previous paleontological studies, and are from diverse geography, map units, and ages. The results, based on over 700 U-Pb SHRIMP analyses of detrital zircons from 13 sandstone samples of Bowser Lake Group show that Bowser Basin was receiving detritus from sources of Early Triassic age to as young as the depositional age of the rock.