| Title | Biostratigraphic correlation of the western and eastern margins of of the Labrador-Baffin Seaway and implications |
| Author | Norh-Hansen, H; Williams, G L; Fensome, R A |
| Source | Geological Survey of Denmark and Greenland Bulletin . |
| Alt Series | Earth Sciences Sector, Contribution Series 20150377 |
| Publisher | Geological Survey of Denmark and Greenland |
| Document | serial |
| Lang. | English |
| Media | paper |
| Province | Newfoundland and Labrador; Nunavut; Offshore region |
| Lat/Long WENS | -80.0000 -40.0000 80.0000 60.0000 |
| Subjects | paleontology; palynology; palynological analysis; palynological analyses; taxonomy; microfossils; palynomorphs; biostratigraphy; paleoenvironment; Cenozoic; Cretaceous |
| Illustrations | location maps; cross-sections, stratigraphic; cross-sections; geological time charts; tables; photomicrographs |
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| Program | Baffin Project Managenment, GEM2: Geo-mapping for Energy and Minerals |
| Abstract | New palynological analysis of samples from 13 offshore wells on the Canadian Margin and six wells on the West Greenland Margin has led to a new event biostratigraphic framework for Cretaceous- Cenozoic
strata of the Labrador Sea - Davis Strait - Baffin Bay (Labrador-Baffin Seaway) region. This framework is based on about 150 dinoflagellate cyst taxa and 30 acritarch, algal, fungal and plant microfossil (mostly miospore) taxa. In the systematics we
include three new genera of dinocysts (Scalenodinium, Simplicidinium and Taurodinium), 16 new species of dinocysts (Chirop - teridium gilbertii, Chytroeisphaeridia hadra, Cleistosphaeridium elegantulum, Cleistosphaeridium palmatum, Dapsilidinium
pseudoinsertum, De flan drea borealis, Evittosphaerula? foraminosa, Gingi - nodinium? flexidentatum, Hystrichosphaeridium quadratum, Hystrichostrogylon digitus, Impletosphaeridium apodastum, Scalenodinium scalenum, Surculosphaeridium convocatum,
Talladinium pellis, Taurodinium granulatum and Trithyrodinium? conservatum), four emendations of dinocyst genera (Alterbidinium, Chatangiella, Chiropteridium and Surculosphaeridium), six new combinations for dinocyst species (Alterbidinium
biaperturum, Deflandrea majae, Kleithriasphaeridium mantellii, Simplicidinium insolitum, Spongodinium grossum, Spongodinium obscurum), one new acritarch species (Fromea quadrangularis), one new miospore species (Baculatisporites crenulatus) and one
new combination for miospores (Tiliaepollenites crassipites). Most of the taxa included provide age information, almost exclusively last occurrences (range 'tops'), but some are useful mainly for environmental interpretations. Collectively, they
provide a powerful tool for helping to establish the geological history of the Labrador-Baffin Seaway. |
| Summary | (Plain Language Summary, not published)
We have carried out new analyses of fossil dinocysts, spores and pollen from 17 petroleum exploration wells in the Labrador-Baffin Seaway between Canada
and Greenland, which has led to a new biostratigraphic framework (and thus timing) for Cretaceous¿Cenozoic strata of the region; this is based mainly on the timing of the extinctions of particular species. This has provided us with new insights into
the geological history of the Seaway, including its origins, invasions and retreats of the sea, and changing climates over the past 100 million years. These insights in turn will lead to a better understanding of potential petroleum systems in the
regions, especially off Labrador and Nunavut. |
| GEOSCAN ID | 297485 |
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