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The AAPG/Datapages Combined Publications Database

Williston Basin Symposium

Abstract

SKGS-AAPG

Fifth International Williston Basin Symposium, June 14, 1987 (SP9)

Pages 178 - 189

TABLELAND PHOTOLINEAMENT PATTERN REVISITED

J.D. MOLLARD, J.D. Mollard and Associates Limited, 510 Avord Tower - 2002 Victoria Avenue, Regina, Saskatchewan, Canada, S4P0R7

ABSTRACT

Distinctive lineament- and ring-patterns appear in airphotos of the landscape surrounding Home Oil's February 1986 deep oil discovery near the abandoned CPR siding of Tableland, Saskatchewan. I identified the photolineament patterns and reported it in the petroleum literature over 30 years ago. In a paper presented in 1959 at the Second Williston Basin Symposium in Regina, I suggested that this remarkable pattern might reflect some type of basement structure such as a hinge line, the effect of which has been perpetuated upward into the overlying sedimentary strata. Because the area is being actively explored for major oil reservoirs in the Devonian Winnipegosis Formation, implications of the remotely sensed photolineament- and ring-patterns in petroleum exploration have taken on added significance. As a consequence, remotely sensed surface features and subsurface geological, hydro-geological, and seismic trend data are currently being synthesized and correlated. These data include near-surface preglacial, glacial and postglacial features and events that appear to be affected by deeper structure in the subsurface.

Lineament block tectonics may have influenced geological events, including shoaling and reefing in the Devonian Winnipegosis, salt removal in the overlying Prairie Evaporite, and differential subsidence that has continued to the present. These interrelated geological events are thought to be responsible for the anomalous surficial lineament- and ring-patterns in the area around the Home Oil discovery well, and for their apparent areal association with reefs in the Winnipegosis Formation lying about 2650 m below ground surface.

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