Index Catalog // ScholarsArchive@OSU

Geochemistry of mid-ocean ridge basalt within and surrounding the Australian-Antarctic discordance

Creator:: Pyle, Douglas G.
Resource Type:: Dissertation
Full Text:: . Christie The Australian-Antarctic Discordance (AAD) is a unique feature of the global mid- ocean ridge

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

The Southeast Indian Ridge water contents of MORB glasses and chemical effects of propagating rifts

Creator:: Sylvander, Brendan A.
Resource Type:: Masters Thesis
Full Text:: along a section of mid-ocean ridge is unique. In general, lavas from the four propagating rifts west of

Magmatic processes at mid-ocean ridges : evidence from lavas and melt inclusions from the Southeast Indian Ridge, the Endeavour Segment of the Juan de Fuca Ridge, and the northern East Pacific Rise

Creator:: Sours-Page, Rachel E.
Abstract:: Magmatic processes control the chemical compositions of all lavas erupted at mid-ocean ridges. In this thesis, I present studies of magmatic processes on three different mid-ocean ridges to determine which processes are in action and to what extent each has affected the chemistry of mid-ocean ridge basalts at each location....
Resource Type:: Dissertation

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

Cenozoic biogenic silica sedimentation in the Antarctic Ocean, based on two deep sea drilling project sites

Creator:: Brewster, Nancy Ann
Abstract:: The Antarctic Ocean during the Cenozoic experienced four periods of increased surface productivity: the Middle Eocene; the beginning of the Miocene; the Middle Miocene; and near the Miocene-Pliocene boundary. The fourth increase in productivity began five million years ago and has since progressively increased to the present level of intense...
Resource Type:: Masters Thesis

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:: , source variability and mid-ocean ridge morphology. The approach adopted here uses a variety of

Physical-biological interactions in the Southern Ocean

Creator:: Moore, Jefferson Keith
Abstract:: Physical-biological interactions in the Southern Ocean were investigated using remote sensing data from several different satellite sensors. Satellite sea surface temperature data were used to study the dynamics of the Antarctic Polar Front (PF). Satellite ocean color data were used to estimate surface chlorophyll concentrations and their relation to various...
Resource Type:: Dissertation
Full Text:: phytoplankton biomass seen at the Antarctic coast and near Southern Ocean islands. Interactions between ocean

Production and export of biogenic silica in the Southern Ocean

Creator:: Sigmon, Daniel E.
Abstract:: Dissolved silicic acid (Si(OH)4) and biogenic silica (BSiO2) concentrations were measured on four different cruises in the Southern Ocean along 1700 W from late October 1997 to mid-March 1998. These data were used to construct a vertically integrated Si budget in the surface layer from 58° to 68° S. Throughout...
Resource Type:: Masters Thesis
Full Text:: , DeMaster et al. 1996). As mentioned earlier, diatoms are not predominant in mid-ocean gyres, likely due to

ScholarsArchive@OSU

Geochemistry of mid-ocean ridge basalt within and surrounding the Australian-Antarctic discordance

The provenance and trace element signatures of MORB anorthitic plagioclase

Magmatic processes beneath mid-ocean ridges : insights from mineral and glass chemistry in plagioclase ultraphyric basalts

The Southeast Indian Ridge water contents of MORB glasses and chemical effects of propagating rifts

Magmatic processes at mid-ocean ridges : evidence from lavas and melt inclusions from the Southeast Indian Ridge, the Endeavour Segment of the Juan de Fuca Ridge, and the northern East Pacific Rise

Helium isotope variations in peridotite, gabbro and basalt from the Kane Oceanic Core Complex

Cenozoic biogenic silica sedimentation in the Antarctic Ocean, based on two deep sea drilling project sites

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

Physical-biological interactions in the Southern Ocean

Production and export of biogenic silica in the Southern Ocean

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search