Geologia Croatica, Vol. 57 No. 2, 2004.
Original scientific paper
Microstructures in Two Alkali Feldspar Megacrysts from the Papuk Mt., Croatia
V. Kovacs Kis
M. Horvat
I. Dodony
Abstract
Two types of megacrysts, one from Pakra Creek and the other from the Slobostina Creek locality proved to be low microcline in association with low albite and quartz. A sample from Pakra Creek is a vein filling megacryst characterised by the absence of twinning. The deduced crystallization temperature is below 460°C. The sample from Sloboština Creek is a pocket forming megacryst which shows tweed-like texture, with deduced crystallization temperature near to but above 460°C. Both samples are characterized by a continuously modulated lattice on the submicroscopic scale.
Keywords
Microstructure; Modulation; Alkali feldspar; Low microcline; Thermal history; Papuk Mt.; Croatia
Hrčak ID:
3673
URI
Publication date:
30.12.2004.
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