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TitleA summary of the Paleozoic biostratigraphy and reexamination of palynology samples from the 9590 to 10 000 ft. (2923.0–3048.0 m) interval of the Gannet O-54 well, Grand Banks of Newfoundland
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBingham-Koslowski, NORCID logo; Miller, M A
SourceGeological Survey of Canada, Open File 8819, 2021, 7 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
File formatpdf
ProvinceNewfoundland and Labrador; Eastern offshore region
AreaGrand Banks; Atlantic Ocean
Lat/Long WENS -52.6353 -52.6350 45.0653 45.0650
Subjectspaleontology; stratigraphy; geochemistry; Nature and Environment; Science and Technology; exploration wells; biostratigraphy; palynology; spores; thermal alteration index; Upper Devonian; Middle Devonian; continental margins; continental shelf; organic materials; Gannet O-54 Well; Ancyrospora sp.; Phanerozoic; Paleozoic; Devonian
Illustrationslocation maps; tables
ProgramGEM2: Geo-mapping for Energy and Minerals Baffin Region
Released2021 09 14
AbstractFive unoxidized palynological (kerogen) slides from the lowermost section of the Gannet O-54 well (part of the Geological Survey of Canada - Atlantic's archived slide collection) were re-analyzed with the hope of providing refined ages for this mainly indeterminate interval: slides P3580-07 (9590'/2923.0 m), P3581-07 (9690'/2953.5 m), P3582-07 (9790'/2984.0 m), P3583-07 (9890'/3014.5 m), and P3584-07 (10 000'/3048.0 m). Thermal alteration indices (TAIs) were also measured where possible. Three of the slides are barren (P3581-07, P3583-07, and P3584-07). One slide (P3582-07) contains two spores: Middle to Late Devonian Ancyrospora sp. with a TAI value of 6+ and an indeterminate spore with a TAI value of 5+. Both spores are interpreted as caved and thus not useful in determining age. Only one slide, P3580-07 (9590'/2923.0 m), yields in situ, identifiable spores, indicating a Middle to Late Devonian age, which is consistent with previously published palynological data for Gannet O-54.
Summary(Plain Language Summary, not published)
This report provides a summary of pre-existing palynological (age) data for the Paleozoic interval of the Gannet O-54 well as well as new results from a re-examination of palynological slides from the lowermost section (9590' - 10 000') of the well. The slides are part of the Geological Survey of Canada's archived collection and palynomorph recovery was sparse to absent in the slides. Of the five slides that were re-examined, only one slide had useable palynomorphs that resulted in a Middle to Late Devonian age assignment for that depth. Thermal alteration indices are also reported where possible from the five slides and indicate that the strata fall within the dry gas to over mature phase based on the Amoco TAI Scale.

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