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Filtering by: Subject Mid-ocean ridges -- Antarctic Ocean Subject Basalt

The provenance and trace element signatures of MORB anorthitic plagioclase

Creator:

Burleigh, Andrew W.

Abstract:

In an attempt to understand the phase equilibria and petrogenesis of MORB anorthitic plagioclase, Cr-spinel commonly hosted within anorthitic plagioclase has been investigated petrographically and compositionally. Based on spinel-anorthite relationships from three samples of plagioclase ultra-phyric basalt (PUB; Southeast Indian Ridge, Axial Seamount and West Valley Segment, Juan de Fuca...

Resource Type:

Masters Thesis

Full Text:

and relatively homogeneous composition of mid ocean ridge basalt (MORB) suggested that they were a
Magmatic processes beneath mid-ocean ridges : insights from mineral and glass chemistry in plagioclase ultraphyric basalts

Creator:

Lange, Amy E.

Abstract:

Prior to eruption at mid-ocean ridges, melts must travel through >6 km of crust from their origin in the mantle. The final composition of the melts is dependent on both the melting conditions and magmatic processes within the crust. While mid-ocean ridge basalt (MORB) glasses are commonly used to infer...

Resource Type:

Dissertation

Full Text:

processes within the crust. While mid-ocean ridge basalt (MORB) glasses are commonly used to infer melting
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