Microstructures in Two Alkali Feldspar Megacrysts from the Papuk Mt., Croatia

Geologia Croatica

卷:57

Marija Horvat¹  Istvan Dodony²  Viktoria Kovacs Kis² 

[1] Croatian Geological Survey;

[2] Department of Mineralogy, Eötvös L. University;

关键词: Microstructure;    Modulation;    Alkali feldspar;    Low microcline;    Thermal history;    Papuk Mt.;    Croatia;   

DOI  :  10.4154/GC.2004.12

来源: DOAJ

【 摘 要 】

Two types of megacrysts, one from Pakra Creek and the other from the Sloboština 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.

【 授权许可】

Unknown