Article,
New constraints on the age, geochemistry, and environmental impact of High Arctic Large Igneous Province magmatism: Tracing the extension of the Alpha Ridge onto Ellesmere Island, Canada
Contributors
Naber, T.
0000-0002-4508-7387
[1]
[2]
[3]
[4]
Grasby, S. E.
0000-0002-3910-4443
[1]
[2]
[3]
[4]
Tegner, Christian
0000-0003-1407-7298
(Corresponding author)
[5]
Affiliations
- [1] Univ Calgary, Dept Geosci, Calgary, AB, Canada [NORA names: Canada; America, North; OECD];
- [2] Nat Resources Canada, Geol Survey Canada Calgary, Calgary, AB, Canada [NORA names: Canada; America, North; OECD];
- [3] Nat Resources Canada, Geol Survey Canada Calgary, Calgary, AB, Canada [NORA names: Canada; America, North; OECD];
- [4] Nat Resources Canada, Geol Survey Canada Calgary, Calgary, AB, Canada [NORA names: Canada; America, North; OECD];
- [5] Aarhus Univ, Ctr Earth Syst Petrol, Dept Geosci, Aarhus, Denmark [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD]
Abstract
The High Arctic Large Igneous Province (HALIP) represents extensive Cretaceous magmatism throughout the circum-Arctic borderlands and within the Arctic Ocean (e.g., the Alpha-Mendeleev Ridge). Recent aeromagnetic data shows anomalies that extend from the Alpha Ridge onto the northern coast of Ellesmere Island, Nunavut, Canada. To test this linkage we present new bulk rock major and trace element geochemistry, and mineral compositions for clinopyroxene, plagioclase, and olivine of basaltic dykes and sheets and rhyolitic lavas for the stratotype section at Hansen Point, which coincides geographically with the magnetic anomaly at northern Ellesmere Island. New U-Pb chronology is also presented.
