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Helium isotope variations in seafloor basalts from the Northwest Lau Backarc Basin: Mapping the influence of the Samoan hotspot

Lupton, John; Arculus, Richard; Greene, Ronald; Evans, L J; Goddard, C I


New helium isotope results for seafloor basalts from the northern Lau Basin indicate that the signature of the Samoan hotpot has penetrated beneath the Rochambeau Rifts (RR) and the Northwest Lau Spreading Center (NWLSC) all the way to the Peggy Ridge (PR). Helium isotope ratios in 29 samples from the NWLSC - RR range from 10.9 to 28.1 Ra, all clearly higher than typical depleted mantle or MOR-type values. Comparison with other helium results from the northern Lau Basin show the Samoan hotspot...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Geophysical Research Letters
DOI: 10.1029/2009GL039468


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