Mossbauer spectra of white micas from the Central Western Carpathians Mountains

被引:0
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作者
Sitek, J. [1 ]
Sulak, M. [2 ]
Putis, M. [2 ]
Toth, I. [1 ]
机构
[1] Slovak Univ Technol Bratislava, Fac Elect Engn & Informat Technol, Dept Nucl Phys & Technol, Ilkovicova 3, Bratislava, Slovakia
[2] Comenius Univ, Fac Nat Sci, Dept Mineral & Petrol, Bratislava 84215, Slovakia
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D O I
10.1088/1742-6596/217/1/012057
中图分类号
O59 [应用物理学];
学科分类号
摘要
Potassium white micas from the rocks included into Cretaceous deformation zones (ca. 100-70 Ma in age) of the Central Western Carpathians were investigated by Mossbauer spectroscopy. White micas formed during a polystage evolution and changing P-T conditions of their crystallization in crustal-scale shear zones. We found criteria for distinguishing generations of celadonite-poor (muscovitic) and celadonite-rich (phengitic) white micas using Mossbauer spectroscopy. This method revealed contrasting spectra characterized by typical quadrupole doublets corresponding to Fe2+ and Fe3+ contents in white micas. They are in the range of 2.9-3.0 nun/s for phengite, and 2.6-2.7 mm/s for muscovite. Mossbauer spectra reflect well the chemical changes in white mica aggregates, especially of those close to the end-member muscovite and (alumino-)celadonite compositions.
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页数:4
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