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Filtering by: Funding statement Financial support is provided by NSF‐OCE 0002875 and NSF‐OCE 0351437. Creator Koppers, Anthony A. P.

Age systematics of two young en echelon Samoan volcanic trails

Creator:

Koppers, Anthony A. P., Russell, Jamie A., Roberts, Jed, Jackson, Matthew G., Konter, Jasper G., Wright, Dawn J., Staudigel, Hubert, and Hart, Stanley R.

Abstract:

The volcanic origin of the Samoan archipelago can be explained by one of three models, specifically, by a hot spot forming over a mantle plume, by lithospheric extension resulting from complex subduction tectonics in the region, or by a combination of these two processes, either acting sequentially or synchronously. In...

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setting is characterized by horst and graben type features. In addition, the WESAM seamounts themselves
Implications of a nonlinear ⁴⁰Ar/³⁹Ar age progression along the Louisville seamount trail for models of fixed and moving hot spots

Creator:

Koppers, Anthony A. P., Duncan, Robert A., and Steinberger, Bernhard

Abstract:

The Louisville seamount trail has been recognized as one of the key examples of hot spot volcanism, comparable to the classic volcanic Hawaiian-Emperor lineaments. The published total fusion ⁴⁰Ar/³⁹Ar data of Watts et al. [1988] showed an astonishing linear age progression, firmly establishing Louisville as a fixed hot spot in...

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preparation and acid leaching are described by Koppers et al. [2000]. The mass spectrometer is a 90� sector