Muscovite-biotite granite from the Kalvárie hill in the Jihlava town

Vol.20,No.1-2(2013)

Miloš René

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Abstract
The fine-grained to medium-grained muscovite-biotite granite occurs on the Kalvárie hill in the Jihlava town. It contains quartz, K-feldspar (Or79–91Ab9–21An0–0.10), plagioclase (An11–20), biotite and muscovite. Mn- bearing ilmenite, apatite, andalusite, zircon and monazite are accessories. Granites are peraluminous (A/CNK 1.12) and display relatively high K/Rb ratio (179–184). Compared to common S-type granites, rocks from the Kalvárie hill are poor in Mg (0.4 wt. % MgO), Ca (0.7–0.8 wt. % CaO), Rb (237–245 ppm), Zr (84–86 ppm) and bulk of REE (97 ppm). These granites could be ranged to the Bílý Kámen variety of the Moldanubian batholith.

Keywords:
Bohemian Massif; Moldanubian batholith; granite; petrology; geochemistry
References

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