Upper Triassic Mid-Latitude Cool-Water Carbonate Deposit: Sedimentology and Stratigraphy of the Gore Point Member, Roche Point Formation, Arctic Islands, Canada ...

• Main Author: Hay, Chelsey
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Science 2021
• Subjects: Education > Sciences; Geology; FOS Earth and related environmental sciences; Arctic; Ellesmere Island; Canada; King Island; Mackenzie King Island; Roche Point; sverdrup basin
• Online Access: https://dx.doi.org/10.11575/prism/38630; https://prism.ucalgary.ca/handle/1880/113068

The Gore Point Member is a mixed carbonate-siliciclastic unit deposited in the Sverdup Basin (Canadian Arctic Islands) during the Carnian (Late Triassic). While mixed carbonate-siliciclastic deposits are not rare within the global rock record, the Gore Point Member is unique in that it is the only unit with meaningful amounts of carbonate material within the Mesozoic succession of the Sverdrup Basin. However, as detailed sedimentological or sequence stratigraphic studies of the Gore Point Member have been yet to be undertaken, the existence of this anomalous unit remains unexplained. This study applies thin section microscopy and microfacies analysis of 285 samples from 12 sites across western Ellesmere Island, and lithofacies analysis of one core on Mackenzie King Island, to interpret the depositional setting of the Gore Point Member. These observations reveal fine-grained quartz-dominated siliciclastics and heterozoan carbonate material deposited in a ramp setting in an arid, cool-temperate environment. ...