Diagenesis and thermal maturation of the Eureka sound formation, Strand Fiord, Axel Heiberg Island, Arctic Canada ...

• Main Author: Allen, David Peter Beddome
• Format: Text
• Language: English
• Published: University of British Columbia 2010
• Subjects: Arctic; Axel Heiberg Island; Eureka Sound
• Online Access: https://dx.doi.org/10.14288/1.0052792; https://doi.library.ubc.ca/10.14288/1.0052792

Nearly 3000 continuous metres of Eureka Sound Formation sandstones, shales and coals were examined in outcrop along Kanguk Peninsula, Axel Heiberg Island, N.W.T., in the present study. From these rocks, diagenetic parameters such as illite crystrallinity, 1.0 nm peak sharpness ratios, proportion of illite in illite/smectite mixed layers, and sandstone cement paragenesis have been used in combination with thermal modelling to make inferences about the thermochemical evolution of the strata and their contained pore waters. The findings from both the thermal modelling and sandstone petrology suggest that a syn- or post-tectonic heat flow anomaly existed whereby heated Na⁺-enriched waters passed from diapir cores (where halite dissolution occurred) into laterally adjacent permeable lithologies such as coals and arenites. This concept is supported by an offset in the plot of vitrinite reflectance versus depth whereby the upper segment (based primarily on coals) has higher reflectance values than the lower segment ...