Abegunrin, Ayobami; Ikari, Matt J; Saffer, Demian M; Zhang, Junli; Kopf, Achim J: Stick-Slip details for ODP sample 190-1177A-46R-01 from the Nankai Trough Ashizuri transect [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995892 (dataset in review), In: Abegunrin, A et al.: Laboratory friction results of samples from the Nankai Trough Ashizuri transect [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995896 (dataset in review)
Abstract:
Despite the availability of drilling core samples from scientific expeditions, published friction data from the Nankai Trough Ashizuri transect are limited compared to those from the Kumano and Muroto counterparts. This dataset presents laboratory friction results from samples obtained along the Ashizuri transect, elucidating their potential implications for unstable slip behavior. Nine representative sediment samples from two sites (297 and 1177), drilled on the pre-subduction incoming sediments, were investigated. We conducted single direct-shear experiments under an effective normal stress of 10 MPa, employing velocity-stepping procedures with driving velocities ranging from the Nankai Trough plate rate of ~0.002 µm/s (~6 cm/yr) to 30 µm/s on both intact and powder samples. The measured coefficient of friction (μ) showed two distinct groups: μ<0.3 for clayey samples rich in phyllosilicates (55-65%) and μ>0.5 for sandy samples low in phyllosilicates (10-20%). At slow velocities comparable to the plate rate, the velocity-step test revealed predominantly velocity-weakening frictional behavior for Site 297 samples, whereas Site 1177 samples were more velocity-strengthening. Additionally, Stick-slip cycles were observed in sample 1177-46R-01 at driving velocities of 0.1, 0.3, 1, 3, and 10 μm/s. Over this velocity range, the stress drop correlates negatively with the recurrence interval and positively correlates with the average slip velocity. The dataset provides evidence of unstable slip in frictionally weak, clay-rich samples, a condition necessary for earthquake slip. Such materials are expected to slide stably based on previous work.
Keyword(s):
Related to:
Abegunrin, Ayobami; Ikari, Matt J; Saffer, Demian M; Zhang, Junli; Kopf, Achim J (submitted): Slip Instability in the Nankai Trough - Insights from the Ashizuri Transect.
Coverage:
Latitude: 31.652510 * Longitude: 134.011880
Date/Time Start: 2000-05-07T17:30:00 * Date/Time End: 2000-06-30T02:22:00
Minimum Elevation: -4844.3 m * Maximum Elevation: -4844.3 m
Event(s):
190-1177A * Latitude: 31.652510 * Longitude: 134.011880 * Date/Time Start: 2000-06-30T02:22:00 * Date/Time End: 2000-05-07T17:30:00 * Elevation: -4844.3 m * Penetration: 833.9 m * Recovery: 282.74 m * Location: Philippine Sea * Campaign: Leg190 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 56 cores; 533.7 m cored; 300.2 m drilled; 53 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Abegunrin, Ayobami | |||
| 2 | Type of study | Study type | Abegunrin, Ayobami | |||
| 3 | Shear velocity | Shear velocity | µm/s | Abegunrin, Ayobami | Parameters at shearing velocity | |
| 4 | Recurrence time | Recurrence | s | Abegunrin, Ayobami | Universal clock | |
| 5 | Shear stress | Tau | kPa | Abegunrin, Ayobami | Direct-shear device | at end of stick-slip |
| 6 | Shear stress | Tau | kPa | Abegunrin, Ayobami | Direct-shear device | at start of stick-slip |
| 7 | Stress drop | Δτ | kPa | Abegunrin, Ayobami | Direct-shear device | |
| 8 | Peak slip velocity | Peak slip vel | µm/s | Abegunrin, Ayobami |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
3971 data points
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