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首页> 外文期刊>Bulletin of Canadian Petroleum Geology >Stratigraphy and palynology of the Cretaceous Colorado Group and Lea Park Formation at Cold Lake, Alberta, Canada
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Stratigraphy and palynology of the Cretaceous Colorado Group and Lea Park Formation at Cold Lake, Alberta, Canada

机译：加拿大艾伯塔省冷湖的白垩纪科罗拉多组地层学和孢粉学

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Stratigraphic research of the Colorado Group at Cold Lake, Alberta, has generally been assumed to be of secondary importance to that of the underlying Grand Rapids and Clearwater formations and of their significant volumes of bitumen. However, recent oil field development has required the geomechanical testing of the overlying shales. Using palynology, it has been found that the age of the group ranges from the late middle Albian to Santonian/Campanian and that the uppermost shales are part of the Lea Park Formation. Within the Colorado Group, six formations and an undefined unit can be resolved on logs and, in part, with palynomorphs. The basal contact of the overlying Lea Park Formation can be defined using logs but not the top because the overlying log signatures of the Cenozoic tills are very similar. There are areas within the Cold Lake region that contain evidence of post-Cretaceous erosion of the Lea Park Formation and the top two units of the Colorado Group, but this erosion and subsequent glaciogenic thrusting does not affect lower Stratigraphic intervals in the study area.
机译：一般认为，位于亚伯达省冷湖的科罗拉多集团的地层研究对潜在的大急流城和清水岩层及其大量沥青具有次要的重要性。但是，最近的油田开发要求对上覆页岩进行地质力学测试。利用孢粉学，已经发现该组的年龄范围从中晚期的阿尔比到桑顿期/坎帕坎期，最上层的页岩是利阿公园地层的一部分。在科罗拉多组内，六个地层和一个未定义的单元可以通过原木分解，部分也可以用古怪形态分解。上层Lea Park地层的基础接触可以用原木而不是顶部来定义，因为新生代耕层的上层原木特征非常相似。冷湖地区内的区域包含白垩纪后的Lea Park地层侵蚀和Colorado Group顶部的两个单元的证据，但是这种侵蚀和随后的成冰作用并不影响研究区较低的地层间隔。

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