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Filtering by: Subject Mid-ocean ridges -- Indian Ocean Contributor advisor sim Graham, David

Mantle melting and heterogeneity along mid-ocean ridges : insight from basalt geochemistry along axial depth and morphologic gradients for intermediate spreading rate systems

Creator:

Russo, Christopher J.

Abstract:

This investigation focuses on gaining a better understanding of the complex relationship between melt generation, source variability and mid-ocean ridge morphology. The approach adopted here uses a variety of geochemical techniques to evaluate the ability of 'global' models to predict regional scale geochemical variability associated with axial depth and axial...

Resource Type:

Dissertation

Full Text:

between Indian and Pacific mid-ocean ridge basalt (MORB) mantle sources. Results of major and trace
Helium isotope variations in peridotite, gabbro and basalt from the Kane Oceanic Core Complex

Creator:

Konrad, Kevin

Abstract:

The Kane Oceanic Core Complex (OCC) is a valuable window into crustal architecture and chemical composition of the lithosphere beneath a slow-spreading ocean ridge. A suite of > 30 samples (comprised of whole rocks, mineral separates and basalt glasses) has been analyzed for ³He/⁴He isotope ratios and He concentrations. Gas...

Resource Type:

Masters Thesis

Full Text:

(8.0-8.2 RA) for mid-ocean ridge basalts. This suggests that domains of depleted upper mantle in the