Editorial Board

+Volume 58, issue 2, 2025

+Volume 58, issue 1, 2025

+Volume 57, issue 2, 2024

+Volume 57, issue 1, 2024

+Volume 56, issue 2, 2023

+Volume 56, issue 1, 2023

+Volume 55, issue 2, 2022

+Volume 55, issue 1, 2022

+Volume 54, issue 2, 2021

+Volume 54, issue 1, 2021

+Volume 53, issue 2, 2020

+Volume 53, issue 1, 2020

+Volume 52, issue 2, 2019

+Volume 52, issue 1, 2019

+Volume 51, issue 2, 2018

+Volume 51, issue 1, 2018

+Volume 50, issue 2, 2017

+Volume 50, issue 1, 2017

+Volume 49, 2016

+Volume 48, 2015 (GRR for 2014) (in print)

+Volume 47, 2014 (GRR for 2013)

+Volume 46, 2013 (GRR for 2012)

+Volume 45, 2012 (GRR for 2011)

+Volume 44, 2011 (GRR for 2010)

–Volume 43, 2010 (GRR for 2009)

Regional Geology and Stratigraphy

Quaternary, Engineering Geology

Mineralogy, Petrology, Geochemistry

Research Abroad

Mineral Resources

Methods and Procedures

+Volume 42, 2009 (GRR for 2008)

+Volume 41, 2008 (GRR for 2007)

+Volume 40, 2007 (GRR for 2006)

+Volume 39, 2006 (GRR for 2005)

+Volume 38, 2005 (GRR for 2004)

+Volume 37, 2004 (GRR for 2003)

+Volume 36, 2003 (GRR for 2002)

+Volume 35, 2002 (GRR for 2001)

+Volume 34, 2001 (GRR for 2000)

+Volume 33, 2000 (GRR for 1999)

+Volume 32, 1999 (GRR for 1998)

+Volume 31, 1998 (GRR for 1997)

+Volume 30, 1997 (GRR for 1996)

+Volume 29, 1996 (GRR for 1995)

+Volume 28, 1995 (GRR for 1994)

+Volume 27, 1994 (GRR for 1993)

+Volume 26, 1993 (GRR for 1992)

+Volume 25, 1993 (GRR for 1991)

Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

Origin of secondary amphibole in ultrabasic and basic rocks of the Ransko massif (E-Bohemia)

Pavel Schovánek, Ferry Fediuk, Josef Klomínský

Geoscience Research Reports 43, 2010 (GRR for 2009), pages 248–252

Keywords: amphibole, plagioclase, olivine, serpentinization, argillization, zeolitization, ultrabasic and basic rocks, Ransko massif

Map sheets: Žďár nad Sázavou (23-22)

Full text (PDF, 0.19 MB)

Abstract

The chemical composition and formation of secondary amphiboles in ultrabasic to basic rocks of the Ransko gabbro-peridotite massif have been studied. Primary calcium-rich plagioclases were altered into clay minerals, carbonates and/or thomsonite. The thin section study and the chemical analyses of these minerals revealed subsequent formation of amphiboles, frequently accompanied by pale-green ceylonite (spinel group). Serpentinization of olivine provided necessary Mg and Fe ions.