Very high-resolution ground magnetics characterisation of hydrothermal processes in the Danakil depression
Abstract
Understanding hydrothermal processes in salts has applications on Mars, where thick salt (sulfate) sequences are common and past or present hydrothermal systems probably widespread. Due to dissolution, hydrothermal circulation alters rock magnetization. High-resolution magnetic surveying is therefore able to distinguish between areas of strong and weak hydrothermal activity, as well as associated structural discontinuities. We present preliminary results from very high-resolution magnetic surveying at unprecedented resolution in Lake Asale, Danakil depression, near Dallol. Preliminary results indicate that hydrothermal circulation patterns as from the survey are very well correlated with geologic evidence at surface such as open fissures, hydrothermal pools and noise generated by subsurface bubbling.
- Publication:
-
EPSC-DPS Joint Meeting 2019
- Pub Date:
- September 2019
- Bibcode:
- 2019EPSC...13..804M