Title Information
Title
Advances in Experimental Methods and Apparatus Design Applied to Investigate the Creep and Dehydration Behavior of Antigorite Serpentinite
Type of Resource (primo)
dissertations
Name: Personal
Name Part
Burdette, Eric Paul
Role
Role Term: Text
creator
Name: Personal
Name Part
Hirth, Greg
Role
Role Term: Text
Advisor
Name: Personal
Name Part
Cooper, Reid
Role
Role Term: Text
Reader
Name: Personal
Name Part
Huber, Christian
Role
Role Term: Text
Reader
Name: Personal
Name Part
Liang, Yan
Role
Role Term: Text
Reader
Name: Personal
Name Part
Beeler, Nick
Role
Role Term: Text
Reader
Name: Corporate
Name Part
Brown University. Department of Earth, Environmental, and Planetary Sciences
Role
Role Term: Text
sponsor
Origin Information
Copyright Date
2021
Physical Description
Extent
xiv, 159 p.
digitalOrigin
born digital
Note: thesis
Thesis (Ph. D.)--Brown University, 2021
Genre (aat)
theses
Abstract
This thesis details advances in experimental deformation methods applied to investigate the creep behavior of antigorite serpentinite. Antigorite is present in downgoing slabs and nearby mantle of subduction zones, possibly initiating intermediate depth earthquakes and controlling slab-mantle rheological coupling. The stick-slip (earthquake-like) behavior of antigorite has not been demonstrated at pressures where it is common in the earth. The first chapter of this thesis is an investigation of the influence of stored energy (through machine stiffness) on antigorite weakening during dehydration at 1 GPa confining pressure. The reduced stiffness produces shear heating. The third chapter outlines methods for calculating stiffness in typical geometry used for pressurized rock deformation experiments and the effects that typical experimental influences like the amount of viscous resistance may have on experimental fault compliance. Appendix A details a loading path that was leads to stick-slip in dehydrating antigorite. The unusual sheet structure and mesh texture of antigorite requires high pressure, limited temperature, and long times to accurately measure its rheology. The second chapter demonstrates methods and results of antigorite deformation under constant stress conditions in a Griggs-type apparatus at 1 GPa confining pressure. The recovered microstructure indicates basal sliding limited by kinking of antigorite grains controls deformation. The fourth chapter describes a sensor built primarily to measure internal load during high pressure creep experiments. Appendix B describes preliminary experiments deforming confined olivine with free surfaces.
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/00853025")
Topic
Chemical kinetics
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/00919512")
Topic
Fabry-Perot interferometers
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/00941002")
Topic
Geophysics
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01136435")
Topic
Subduction zones
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01099157")
Topic
Rock deformation
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01113349")
Topic
Serpentinite
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01011792")
Topic
Materials--Creep
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01045539")
Topic
Olivine
Subject (fast) (authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/00900899")
Topic
Earthquakes
Language
Language Term (ISO639-2B)
English
Record Information
Record Content Source (marcorg)
RPB
Record Creation Date (encoding="iso8601")
20211004
Identifier: DOI
10.26300/cdn5-he41