minerals Article A Provenance Study of Upper Jurassic Hydrocarbon Source Rocks of the Flemish Pass Basin and Central Ridge, Offshore Newfoundland, Canada Matthew Scott 1,*, Paul J. Sylvester 2 and Derek H. C. Wilton 3 1 Canada-Newfoundland and Labrador Offshore Petroleum Board, St. John’s, NL A1E 1E2, Canada 2 Department of Geosciences, Texas Tech University, Lubbock, TX 79409-1053, USA;
[email protected] 3 Department of Earth Sciences, Memorial University of Newfoundland, St. John’s, NL A1B 3X5, Canada;
[email protected] * Correspondence:
[email protected] Abstract: A number of hydrocarbon discoveries have been made recently in the Flemish Pass Basin and Central Ridge, offshore Newfoundland, Canada, but there is only limited geological informa- tion available. The primary goal of this study was to determine the sedimentary provenance and paleodrainage patterns of mudstones and sandstones from the Upper Jurassic Rankin Formation, including the Upper and Lower Kimmeridgian Source Rock (organic-rich shale) members and Upper and Lower Tempest Sandstone Member reservoirs, in this area. A combination of heavy mineral analysis, whole-rock geochemistry and detrital zircon U-Pb geochronology was determined from cores and cuttings from four offshore wells in an attempt to decipher provenance. Detrital heavy minerals in 20 cuttings samples from the studied geologic units are dominated by either rutile + Citation: Scott, M.; Sylvester, P.J.; zircon + apatite ± chromite or rutile + apatite + tourmaline, with minor zircon, indicating diverse Wilton, D.H.C. A Provenance Study source lithologies. Whole rock Zr-Th-Sc trends suggest significant zircon recycling in both mudstones of Upper Jurassic Hydrocarbon and sandstones.