| Autor: |
Toshimori Sekine, Itoyuki Nishioka, Minoru Funaki |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Earth, Planets and Space. 59:e45-e48 |
| ISSN: |
1880-5981 |
| DOI: |
10.1186/bf03352060 |
| Popis: |
Changes in the anisotropy of the low-field magnetic susceptibility (AMS) of basaltic andesite were induced by decaying stress waves and subsequently quantified. An initial shock pressure of 5 GPa was generated in a block of the target rock through impacting with a cylindrical projectile. Following the impact, the maximum or minimum principal susceptibility axes of the target were reoriented toward the shock direction at low (0.5–3 GPa) or high (>3 GPa) estimated shock pressures, respectively. Subtraction of the initial AMS demonstrated a parallelism between the induced susceptibility axes and the shock direction. These results suggest a potential application of AMS as an indicator of the propagation directions of stress waves generated in rocks at terrestrial impact structures. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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