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Personen: den Brok, Bas (Autor) 
Zahid, Mohsine (Autor) 
Passchier, Cornelis Willem (Autor) 
Titel: Pressure solution compaction of sodium chlorate and implications for pressure solution in NaCl
Quelle: Tectonophysics. Bd. 307. H. 3/4. S. 297 - 312
Erscheinungsjahr:    1999
ISBN / ISSN: 0040-1951
URL der Originalveröffentlichung doi:10.1016/S0040-1951(99)00103-1
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:    Passchier, Cornelis Willem  In UnivIS suchen 
Einrichtung: Institut für Geowissenschaften
DDC-Sachgruppe:    Geowissenschaften
DFG-Fachgebiet: Geologie und Paläontologie
ID: 16390  Universitätsbibliothek Mainz
Informationen zu den Nutzungsrechten unserer Inhalte Informationen zu den Nutzungsrechten unserer Inhalte
Abstract: Sodium chloride (NaCl) has been extensively used as a material to develop, test and improve pressure solution (PS) rock deformation models. However, unlike silicate and carbonate rocks, NaCl can deform plastically at very low stresses (~0.5 MPa). This could mean that NaCl is less suitable for use as an analogue for rocks that do not deform plastically at conditions where PS is important. In order to test the reliability of NaCl as a rock analogue, we carried out a series of uniaxial compaction experiments on sodium chlorate (NaClO3) at room pressure and temperature (P-T) conditions and applied effective stresses of 2.4 and 5.0 Mpa. NaClO3 is a very soluble, elastic-brittle salt, that cannot be deformed plastically at room P-T conditions. The results were compared with experiments on NaCl at similar conditions and show that NaClO3 behaves in a strikingly similar way to NaCl, despite its brittleness. Like NaCl, it most likely compacts by a grain boundary diffusion controlled PS mechanism. Mechanical data were fitted to a power law in the form: (with volumetric strain rate , volumetric strain [var epsilon], effective stress [sigma] and grain size d). A reasonable fit was obtained, with [alpha]=2 to 4, n=1.6±0.5, and m=2.8±0.5. The similarity in mechanical behaviour of the two materials (NaCl plastic, NaClO3 brittle) suggests that plasticity does not play a key role in PS compaction deformation of NaCl. This means that its plasticity is not a drawback for its use as a PS analogue for rocks or for deriving PS creep laws for salt from compaction experiments.
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