Radiaxial-fibrous and fascicular-optic Mg-calcitic cave cements: a characterization using electron backscattered diffraction (EBSD)
| Autor: | Detlev K. Richter, Adrian Immenhauser, Rolf Dieter Neuser, Augusto Mangini |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | International Journal of Speleology, Vol 44, Iss 1, Pp 91-98 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1827-806X 0392-6672 |
| DOI: | 10.5038/1827-806X.44.1.8 |
| Popis: | Electron backscattered diffraction (EBSD) applied to crystal fabric research in speleothems aids in our understanding of the origin of those fabrics. A significant advantage of this approach is the three dimensional data set of crystal c-axes. Here, we show a rare case of both convergent (radiaxial-fibrous) and divergent (fascicular-optic) orientations of the c-axes in pool calcites. The seemingly defective structure of the calcite lattice resulting in radiaxial-fibrous crystal orientations is probably caused by differential incorporation of Mg during crystal growth. The observation that radiaxial-fibrous and fascicular-optic fabrics co-exist in the same pool environment is remarkable and documents the complexity of the system. |
| Databáze: | Directory of Open Access Journals |
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