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| Titel |
Mechanical effects of the hydration of periclase to brucite in calcite-periclase aggregates; an experimental study |
| VerfasserIn |
Hakan Kuleci, Christian Schmidt, Eric Rybacki, Georg Dresen, Rainer Abart |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078866
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| Zusammenfassung |
| It has long been recognized that deformation and fluid flow are intimately coupled. For
example hydration phenomena are often localized in zones of intense deformation. We
investigated the opposite phenomenon looking at the deformation that is generated by
hydration. This scenario may be relevant in the context of serpentinization, where large
positive volume changes are associated with the hydration of olivine. This positive volume
change may be accommodated by fracturing, which in turn provides fluid pathways leading to
a positive feedback.
We select the model reaction:
MgO (Periclase) + H2O -> Mg(OH)2 (Brucite),
which involves a positive volume change of the solids of about 100%, i.e. swelling by a
factor of two with respect to the initial volume of periclase. Using the hot isostatic pressing
technique we prepared dense ( |
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