Semi-brittle deformation of talc at the base of the seismogenic zone
ResourceType
Dataset
DOI
https://doi.org/10.7936/fn25-bp23
Grant/Award Number and Agency
Earth Sciences Instrumentation and Facilities (EAR/IF) Earth Sciences Instrumentation and Facilities (EAR/IF)
funderName
National Science Foundation (NSF)
awardNumber
NSF EAR-1848824
Abstract
With the recognition that the mineral talc is common in the cores of many exhumed faults, it has been suggested that talc may be important to the dynamics and modulation of slip in active fault zones. Talc’s wide stability field allows it to persist both at shallow depths and deep into subduction zones and experimental data suggest that it is also rheologically weak. To understand the behaviour of polycrystalline talc at conditions relevant to a subduction zone environment, we conducted a series of high-strain torsion experiments on natural talc at high pressure (1 GPa) and temperatures (450-500 °C). Scanning Transmission Electron Microscope (STEM) imaging revealed a marked decrease in grain size (long axes reduced from ~3-5 mm to
ORCID
Charis Horn: https://orcid.org/0000-0001-5024-2508;
Philip Skemer: https://orcid.org/0000-0002-6702-1098
Rights
http://creativecommons.org/licenses/by/4.0/
Size
336 kB
Recommended Citation
Horn, Charis and Skemer, Philip, "Semi-brittle deformation of talc at the base of the seismogenic zone" (2023). Digital Research Materials (Data & Supplemental files). 103.
https://openscholarship.wustl.edu/data/103
Publication Date
2023