Journal cover Journal topic
Solid Earth An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 2.921
IF2.921
IF 5-year value: 3.087
IF 5-year
3.087
CiteScore value: 4.8
CiteScore
4.8
SNIP value: 1.314
SNIP1.314
IPP value: 2.87
IPP2.87
SJR value: 0.993
SJR0.993
Scimago H <br class='widget-line-break'>index value: 38
Scimago H
index
38
h5-index value: 36
h5-index36
Volume 5, issue 2
Solid Earth, 5, 805–819, 2014
https://doi.org/10.5194/se-5-805-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Rheology of the Earth – observations, laboratory experiments...

Solid Earth, 5, 805–819, 2014
https://doi.org/10.5194/se-5-805-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 12 Aug 2014

Research article | 12 Aug 2014

High temperature indentation creep tests on anhydrite – a promising first look

D. Dorner1, K. Röller1,†, and B. Stöckhert1 D. Dorner et al.
  • 1Institute of Geology, Mineralogy and Geophysics, Ruhr University, Bochum, Germany
  • Deceased

Abstract. Indentation creep tests are established in materials engineering, providing information on rheology, deformation mechanisms, and related microstructures of materials. Here we explore the potential of this method on natural, polycrystalline anhydrite. The tests are run at atmospheric pressure, temperatures between 700 and 920 °C, and reference stresses between 7 and 30 MPa. An activation energy Q of 338 kJ mol−1 and a stress exponent n of 3.9 are derived. Deformation is localized into shear zones bounding a less deformed approximately conical plug underneath the indenter. Shear zone microstructures reveal inhomogeneous crystal–plastic deformation, subgrains, and extensive strain-induced grain boundary migration, while mechanical twinning appears not to be activated. Microstructure and mechanical data are consistent with deformation by dislocation creep.

Publications Copernicus
Download
Citation