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Filtering by: Creator MacDonald, M. Academic Affiliation College of Earth, Ocean, and Atmospheric Sciences Advisor Koppers, Anthony A. P.

An Evaluation of the Complex Age Progression along the Cook-Austral Islands Using High-resolution ⁴⁰Ar/³⁹Ar Incremental Heating Ages

Creator:

Rose, Joanna

Abstract:

The Cook-Austral island chain has been the center of debate for many years. Contrary to the classical hotspot hypothesis, this volcanic island chain does not exhibit a linear age progression with a single node of active volcanism, but instead shows evidence of young volcanism at several points along the chain....

Resource Type:

Masters Thesis

Full Text:

origins at Macdonald and Arago seamounts appear in the data, supporting the hypothesis that the
New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

Creator:

Konrad, Kevin

Abstract:

Earth’s mantle extends to nearly 3000 km depth, comprises >80 % of Earth’s total volume, and has the largest influence on the primordial and radiogenic heat budget. Despite its importance, the structure and composition of the mantle is still debated. There are three primary models for Earth’s mantle structure that...

Resource Type:

Dissertation

Full Text:

., and Kurz, M., 1983, Constraints on evolution of Earth’s mantle from rare gas systematics: Nature, v
Timescales and tectonics of oceanic plateaus : long-term evolution of Ontong Java Nui and Rio Grande Rise

Creator:

Davidson, Peter C.

Abstract:

Oceanic plateaus are regions of overthickened oceanic crust and are often thought to form from the interaction of mantle plumes with oceanic lithosphere. These regions can cover vast areas of the ocean basins and represent a highly elevated magmatic flux relative to normal mid-ocean ridge spreading. Oceanic plateaus are considered...

Resource Type:

Dissertation

Full Text:

://doi.org/10.1130/G49065.1 Becker, K., Austin, J.A., Exon, N., Humphris, S., Kastner, M., McKenzie, J.A

ScholarsArchive@OSU

An Evaluation of the Complex Age Progression along the Cook-Austral Islands Using High-resolution ⁴⁰Ar/³⁹Ar Incremental Heating Ages

New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

Timescales and tectonics of oceanic plateaus : long-term evolution of Ontong Java Nui and Rio Grande Rise

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