Frictional and mechanical properties for a wide range of geologic materials related to cation exchange capacity
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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2024
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| _version_ | 1867167682400354304 |
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| author | Ikari, Matt J Conin, Marianne |
| author_facet | Ikari, Matt J Conin, Marianne |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Natural faults are known to host a wide range of mineral types, with a wide range of fault strength (quantified by the coefficient of friction) and friction velocity-dependence (quantified by the parameter a-b). In particular the velocity-dependence of friction is important because it partially determines the style of fault slip, from stable creep through a family of slow slip or slow earthquakes, to fast earthquakes. We use a chemical approach related to water-rock interactions. We measured the cation exchange capacity (CEC) of 10 different rock and mineral standards, including non-clays and a range of phyllosilicate minerals. We use the CEC as a proxy for the mineral surface charge and the ability to bind water to the mineral surfaces. For these materials, we conducted laboratory shearing experiments measuring the pre-shear cohesion, peak friction coefficient, residual friction coefficient, post-shear cohesion under 10 MPa effective normal stress. The velocity-dependence of friction a-b was determined from 3-fold velocity step increases in the range 0.1-30 µm/s. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_964844 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Frictional and mechanical properties for a wide range of geologic materials related to cation exchange capacity Ikari, Matt J Conin, Marianne cation exchange capacity; Center for Marine Environmental Sciences; cohesion; EXP; Experiment; fault; friction; Laboratory-experiments; MARUM; rate-and-state friction; water-rock reactions Natural faults are known to host a wide range of mineral types, with a wide range of fault strength (quantified by the coefficient of friction) and friction velocity-dependence (quantified by the parameter a-b). In particular the velocity-dependence of friction is important because it partially determines the style of fault slip, from stable creep through a family of slow slip or slow earthquakes, to fast earthquakes. We use a chemical approach related to water-rock interactions. We measured the cation exchange capacity (CEC) of 10 different rock and mineral standards, including non-clays and a range of phyllosilicate minerals. We use the CEC as a proxy for the mineral surface charge and the ability to bind water to the mineral surfaces. For these materials, we conducted laboratory shearing experiments measuring the pre-shear cohesion, peak friction coefficient, residual friction coefficient, post-shear cohesion under 10 MPa effective normal stress. The velocity-dependence of friction a-b was determined from 3-fold velocity step increases in the range 0.1-30 µm/s. |
| title | Frictional and mechanical properties for a wide range of geologic materials related to cation exchange capacity |
| topic | cation exchange capacity; Center for Marine Environmental Sciences; cohesion; EXP; Experiment; fault; friction; Laboratory-experiments; MARUM; rate-and-state friction; water-rock reactions |
| url | https://doi.org/10.1594/PANGAEA.964844 |