Research Mentor(s)

Susan DeBari

Affiliated Department

Geology

Sort Order

60

Start Date

20-5-2016 12:00 PM

End Date

20-5-2016 3:00 PM

Keywords

Izu-Bonin, continential crust, Rare Earth Element, oceanic crust, Sm/La ratio, IODP

Document Type

Event

Abstract

International Ocean Drilling Program (IODP) Expedition 350 drilled into the relatively unexplored rear arc of the Izu-Bonin-Mariana system (see map). It recovered 2000 meters of volcanic rock core in the spring of 2014. The core has been divided into seven lithostratigraphic units, from age 0 at the top to at least 13 million years at the bottom. I analyzed the major and trace element geochemistry of representative clinopyroxene and glass (in Unit I) and just clinopyroxene (in all other units) in volcaniclastic rocks throughout the core from top to bottom and used them as a proxy for interpreting magma compositional changes through time, which is connected to the development of medium-K2O, light-REE-enriched continental crust (as compared to low-K2O, light-REE-depleted oceanic crust).

Comments

Outstanding Poster Award Recipient

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this documentation for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.

Language

English

Format

application/pdf

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May 20th, 12:00 PM May 20th, 3:00 PM

Using clinopyroxene mineral chemistry to decipher magma composition changes over 13 million years in the Izu-Bonin volcanic arc

Geology

International Ocean Drilling Program (IODP) Expedition 350 drilled into the relatively unexplored rear arc of the Izu-Bonin-Mariana system (see map). It recovered 2000 meters of volcanic rock core in the spring of 2014. The core has been divided into seven lithostratigraphic units, from age 0 at the top to at least 13 million years at the bottom. I analyzed the major and trace element geochemistry of representative clinopyroxene and glass (in Unit I) and just clinopyroxene (in all other units) in volcaniclastic rocks throughout the core from top to bottom and used them as a proxy for interpreting magma compositional changes through time, which is connected to the development of medium-K2O, light-REE-enriched continental crust (as compared to low-K2O, light-REE-depleted oceanic crust).

 

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