UNIVERSITY OSLO

The Centre for Earth Evolution and Dynamics

Adriano
Mazzini





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adrianom@fys.uio.no
HYDROTHERMAL VENTING AT SALTON SEA


The Davis-Schrimpf hydrothermal field is located in the South-eastern part of the Salton Sea (California). This field represents a great opportunity to bridge the phenomenon of mud volcanism with hydrothermal venting. The origin of the hydrothermal activity is linked to magmatic intrusions in a thick sedimentary basin. The same setting is present in the submarine Guyamas Basin. Since December 2006 we have deployed a set of thermometers that monitors in real time the temperature of the hot erupting gryphons and the surrounding cold seeps. The ultimate goal of this project is to record how the frequent earthquakes occurring in the region affect the hydrothermal system at shallow depth. Additionally we have an extensive monitoring of the chemistry of the erupted fluids and detailed infrared images. These data, together with the already completed He sampling, are providing crucial information to define the dynamics of the hydrothermal field activity.

Selected reading:

Mazzini, A., Svensen, H., Etiope, G., Onderdonk, N., Banks, D., 2011. Fluid origin, gas fluxes and plumbing system in the sediment-hosted Salton Sea Geothermal System (California, USA). Journal of volcanology and geothermal research 205, 67-83. DOWNLOAD

Onderdonk, N., Mazzini, A., Shafer, L., Svensen, H., 2011. Controls on the geomorphic expression and evolution of gryphons, pools, and caldera features at hydrothermal seeps in the Salton Sea Geothermal Field, southern California. Geomorphology 130, 327-342. DOWNLOAD

Svensen, H., Hammer, ., Mazzini, A., Onderdonk, N., Polteau, S., Planke, S. and Podladchikov, Y.Y., 2009. Dynamics of hydrothermal seeps from the Salton Sea geothermal system (California, USA) constrained by temperature monitoring and time series analysis. Journal of Geophysical Research (Solid Earth), 114, B09201, doi:10.1029/2008JB006247. DOWNLOAD

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