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Filtering by: Creator Pedersen, Nels David Decade 2000-2009 Has journal sim Geochemistry, Geophysics, Geosystems

Cretaceous-to-recent record of elevated ³He/⁴He along the Hawaiian-Emperor volcanic chain

Creator:

Keller, R. A., Graham, David W., Farley, K. A., Duncan, Robert A., and Lupton, J. E.

Abstract:

Helium isotopes are a robust geochemical tracer of a primordial mantle component in hot spot volcanism. The high ³He/⁴He (up to 35 RA, where RA is the atmospheric ³He/⁴He ratio of 1.39 X 10¯⁶) of some Hawaiian Island volcanism is perhaps the classic example. New results for picrites and basalts...

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. K. Pedersen, and J. E. Lupton (1998), Helium isotope composi- tion of the early Iceland mantle plume
Seamount morphology in the Bowie and Cobb hot spot trails, Gulf of Alaska

Creator:

Chaytor, Jason D., Keller, Randall A., Duncan, Robert A., and Dziak, Robert P.

Abstract:

Full-coverage multibeam bathymetric mapping of twelve seamounts in the Gulf of Alaska reveals that they are characterized by flat-topped summits (rarely with summit craters) and by terraced, or step-bench, flanks. These summit plateaus contain relict volcanic features (e.g., flow levees, late-stage cones, and collapse craters) and as such must have...

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within the Surveyor and Baranof fans is represented by extensive fan-body turbidite chan- nels such as