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Filtering by: Contributor advisor sim Nielsen, Roger L. Remove constraint Contributor advisor sim: Nielsen, Roger L. Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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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
Experimental determination of the temperature and compositional dependences of rare earth element, Y, and Sc partitioning between high-Ca clinopyroxene and natural mafic to intermediate silicate melts

Creator:

Gallahan, William E.

Resource Type:

Masters Thesis
Trace element distribution in igneous minerals and liquids

Creator:

Forsythe, Lance M.

Resource Type:

Dissertation
Olivine and plagioclase-hosted melt inclusions and their application to determining parental arc magmas

Creator:

Kohut, Edward John

Abstract:

Three broadly interrelated problems of critical significance to the proper interpretation of melt inclusion (MI) data are addressed in this thesis. The first issue, the petrogenesis of anorthitic plagioclase phenocrysts in MORB lavas, has relevance due to the presence of numerous MI in many high-An feldspars. This problem was addressed...

Resource Type:

Dissertation
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
Snow Peak, OR: late Miocene to early Pliocene volcanism in the central Cascadia forearc

Creator:

Hatfield, Ashley K.

Abstract:

Snow Peak is a voluminous shield volcano located ~50 km west of the axis of the modern Cascade arc. A previously published K-Ar age estimate indicates that the Snow Peak lavas are ~3 Ma. Subsequently, the preliminary research framework for studying the Snow Peak lavas focused on constraining the petrogenesis...

Resource Type:

Masters Thesis
The role of subduction fluids in generating compositionally diverse basalts in the Cascadia subduction zone

Creator:

Rowe, Michael C.

Abstract:

The primary goal of this study is to assess the impact of a subduction component added to the mantle wedge beneath the Oregon Cascades to the composition and fO2 of primitive Cascade basalts. Olivine-hosted melt inclusions from compositionally diverse basalts across the Cascade arc (~100 km) are utilized in an...

Resource Type:

Dissertation

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Academic Affiliation

Geosciences6
College of Earth, Ocean, and Atmospheric Sciences1

Advisor

Nielsen, Roger L.7
Kent, Adam J. R.1
Kent, Adam jr1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1991 to 2014

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Committee Member

Grunder, Anita3
Coblentz, Bruce1
Field, Cyrus1
Fisk, Martin1
Graham, Dave1
more Committee Members »

Creator

Forsythe, Lance M.1
Gallahan, William E.1
Hatfield, Ashley K.1
Kohut, Edward John1
Lange, Amy E.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1990 to 2013

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Decade

2010-20191
2000-20094
1990-19992

Degree Field

Geology7

Degree Level

Doctoral5
Master's2

Degree Name

Doctor of Philosophy (Ph.D.)5
Master of Science (M.S.)2

File Format

application/pdf1

Language

English [eng]7

License

All rights reserved3

Non-Academic Affiliation

Oregon State University. Graduate School[remove]7

Peer Reviewed

No6

Resource Type

Dissertation5
Masters Thesis2

Rights Statement

In Copyright4
Copyright Not Evaluated3

Subject

Magmas2
Rocks, Igneous2
Basalt1
Basalt -- Inclusions -- Cascade Range1
Basalt -- Inclusions -- Oregon1
more Subjects »

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