Print this pageM. Blair1 and K. Bergman2
1Talisman Energy Inc., Calgary AB
2University
of Regina, Regina SK
ABSTRACT: Allostratigraphic Analysis of the Middle Jurassic in Southern Saskatchewan
The Middle Jurassic of Saskatchewan is a mixed carbonate and siliciclastic succession in which there are complex regional facies relationships. These sediments were deposited on a shallowly dipping shelf in the large marine embayment that covered the northern part of the Williston Basin area during Bajocian and Bathonian time. Rocks of Middle Jurassic age progressively onlapped the post-Mississippian unconformity during an overall transgression that began during the Late Triassic to Early Jurassic times.
The Middle Jurassic of Saskatchewan produces hydrocarbons from the Shaunavon Trend in southwestern Saskatchewan and the Wapella-Moosomin area in southeastern Saskatchewan. The aims of this study are to: 1) understand how the siliciclastic and carbonate depositional systems interrelate from west to east across the study area, 2) Evaluate the poorly understood Middle Jurassic Gravelbourg Formation in detail in order to develop relative sea level curves in the Middle Jurassic, 3) compare the regional sea level curves in the Williston Basin with global eustatic sea level curves.
This study covers approximately 85000km2 in the southern part of Saskatchewan, Canada. The study area is found between the two oil producing fields on either side of southern Saskatchewan.
AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado