Publication Date:
2023-06-27
Description:
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.
Keywords:
Alexandra Land Island, Franz Josef Land; Archive of Ocean Data; ARCOD; DRILL; Drilling/drill rig; FJL-5534-1; Franz Josef Land; George Land, Franz Josef Land; GL-5505-1A; Graham Bell Island, Franz Josef Land; Greeley Island, Franz Josef Land; H-5547-1; H-5547-2A; Hays-1; Hays Island, Franz Josef Land; Hooker Island, Franz Josef Land; Jackson Island, Franz Josef Land; MK-1; Nagursk-1; Northern-1; OG-98-3A; V-98-4; VNIIO-1979; VNIIO-1980; Wiener Neustadt Island, Franz Josef Land; WN-3674
Type:
Dataset
Format:
application/zip, 4 datasets
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