Alteration of basalt mineral surfaces at hydrothermal conditions: Insights into reaction mechanics during solid-fluid interactions. ...
The analysis of solid-fluid interactions in nature is crucial for our understanding of material fluxes and sub-surface stability. However, there is still a significant quantitative and qualitative difference between dissolution data obtained in nature and laboratories. With modern surface-analysis t...
| Main Authors: | , , , , |
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| Format: | Text |
| Language: | English |
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Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
2022
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| Online Access: | https://dx.doi.org/10.48380/4y32-tk68 https://www.dggv.de/e-publikationen/alteration-of-basalt-mineral-surfaces-at-hydrothermal-conditions-insights-into-reaction-mechanics-during-solid-fluid-interactions- |
| Summary: | The analysis of solid-fluid interactions in nature is crucial for our understanding of material fluxes and sub-surface stability. However, there is still a significant quantitative and qualitative difference between dissolution data obtained in nature and laboratories. With modern surface-analysis techniques like AFM, VSI, SEM and Raman Spectroscopy, we can observe alteration on mineral surfaces on a high nanometer to low micrometer scale. This enables us to figure out microscopic reactions that can lead to macroscopic changes at rock surfaces. To gain insights into a natural basaltic system, a subsurface observatory has been installed in a borehole at Surtsey volcano off the southwest coast of Iceland a. In the observatory, mineral surfaces of olivine (Fo90) and basaltic tephra were exposed to hydrothermal conditions at 41°C and 96°C respectively. Laboratory experiments were performed with the same material under conditions similar to those in the Surtsey borehole. With the help of data from both ... |
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