Abstract
Paleomagnetic and rock magnetic analysis of the black anoxic shales, brown shales and carbonates of the Devonian Duvernay Formation in the Western Canada Sedimentary Basin indicates that the organic-rich black shales carry a different magnetization from the other shales and carbonates. Thermal maturation of the black shales has affected the rock magnetic properties, effecting a change from magnetite and hematite magnetization carriers in the immature sediments to magnetite in the mature sediments and indicating a more reducing environment.
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