Transformations of rock-forming minerals under stepwise shockwave compression of quartz-feldspar-biotite-garnet schist from the Southern Urals |
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| Authors: | I V Belyatinskaya V I Fel’dman V V Milyavsky T I Borodina A A Belyakov |
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| Institution: | 1.Department of Petrology, Faculty of Geology,Moscow State University,Moscow,Russia;2.Joint Institute for High Temperatures,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | Patterns in the shock metamorphic transformations of rock-forming minerals (garnet, biotite, plagioclase, and K-feldspar)
in quartz-feldspar-biotite-garnet schist (the Southern Urals) that were subjected to shockwave compression using planar geometry
recovery ampoules were investigated. The maximum shock pressures that were attained upon a few wave circulations in a sample
(stepwise shock compression) reached 26, 36, and 52 GPa. Comparison of the transformations that occurred due to stepwise shock
compression with diaplectic changes of the studied minerals in nature and in the course of experiments with convergent spherical
shock waves revealed significant differences in the transformations of melanocratic (garnet and biotite) minerals under different
types of loading. |
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