Abstract
Ultramafic rocks play an active role in geologic processes including the carbon cycle and serpentinization reactions.Many of these processes accompany mineral transformations that result in volume increase of the product phase (e.g.serpentinization, carbonation).Accommodation of changes in volume is often associated with formation of fracture surfaces as new minerals form.Thus, fracture properties such as tensile strength or fracture toughness are of interest in analyses of volumetric deformation during mineral replacement.Cores extracted from Oman ophiolite were used to measure the tensile strength of the ultramafic matrix.A specimen of serpentinized harzburgite was machined with one notch and used for a three-point bending test within a closed-loop, servo-hydraulic system with crack opening displacement (COD) as the feedback signal to achieve controlled fracture.Acoustic emission (AE) was used to provide additional details on the nature of crack propagation.
Original language | English (US) |
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Title of host publication | 58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024 |
Publisher | American Rock Mechanics Association (ARMA) |
ISBN (Electronic) | 9798331305086 |
DOIs | |
State | Published - 2024 |
Event | 58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024 - Golden, United States Duration: Jun 23 2024 → Jun 26 2024 |
Publication series
Name | 58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024 |
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Conference
Conference | 58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024 |
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Country/Territory | United States |
City | Golden |
Period | 6/23/24 → 6/26/24 |
Funding
This work was supported as part of the Center on Geo-Processes in Mineral Carbon Storage, an Energy Frontier Research Center funded by the U.S.Department of Energy, Office of Science, Basic Energy Sciences, at the University of Minnesota under award # DE-SC0023429.
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics