K-Ar ages of basalts from islands of the Franz Josef Land archipelago, supplement to: Grachev, A F; Arakelyantz, M M; Lebedev, V A; Musatov, Evgeny E; Stolbov, N M (2001): New K-Ar ages for basalts from Franz Josef Land. Russian Journal of Earth Sciences, 3(1), 79-82

New K-Ar age determinations of basalt samples from three drill holes and outcrops on the Franz Josef Land suggest that flood volcanism throughout the archipelago fits in a very narrow age interval (116±5 Ma). For 95% of the samples we studied, age scatter is within analytical uncertainty. New data o...

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Bibliographic Details
Main Authors: Grachev, A F, Arakelyantz, M M, Lebedev, V A, Musatov, Evgeny E, Stolbov, N M
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2001
Subjects:
Drilling/drill rig
VNIIO-1979
VNIIO-1980
Archive of Ocean Data ARCOD
Canada
Franz Josef Land
canada basin
Online Access:https://dx.doi.org/10.1594/pangaea.746727
https://doi.pangaea.de/10.1594/PANGAEA.746727
Description
Summary:New K-Ar age determinations of basalt samples from three drill holes and outcrops on the Franz Josef Land suggest that flood volcanism throughout the archipelago fits in a very narrow age interval (116±5 Ma). For 95% of the samples we studied, age scatter is within analytical uncertainty. New data on basaltic bulk-rock, trace element, and REE compositions point to mantle plume affinity for Early Cretaceous magmatism on the Franz Josef Land, which preceded the onset of seafloor spreading in the Canada Basin.

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