Turmalíny ze svorů svrateckého krystalinika

BURIÁNEK, David and Renata ČOPJAKOVÁ. Turmalíny ze svorů svrateckého krystalinika (Tourmaline from the mica schist of the Svratka Crystalline Complex). Acta Mus. Moraviae, Sci. geol. Brno, 2008, vol. 93, No 1, p. 63-79. ISSN 1211-8796.

Basic information

Original name

Turmalíny ze svorů svrateckého krystalinika

Name in Czech

Tourmaline from the mica schist of the Svratka Crystalline Complex

Name (in English)

Tourmaline from the mica schist of the Svratka Crystalline Complex

Authors

BURIÁNEK, David (203 Czech Republic) and Renata ČOPJAKOVÁ (203 Czech Republic, guarantor)

Edition

Acta Mus. Moraviae, Sci. geol. Brno, 2008, 1211-8796

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Other information

Language

Czech

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/08:00036896

Organization unit

Faculty of Science

Keywords in English

tourmaline; schorl-dravite; boron; metamorphism; mica schist; Svratka Crystalline Complex; Czech Republic

Tags

International impact, Reviewed

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Abstract

V originále

Tourmaline is a typical accessory mineral for most of micaschists in the Svratka Crystalline Complex. Based on petrographic and chemical data, two main generations of tourmaline have been distinguished. The first generation (tourmaline cores) corresponds to the prograde metamorphic event characterised by mineral assemblage Ms+Bt+Tu+/-Ky+/-St. The second generation of tourmaline (tourmaline rims) formed during exhumation of the Svratka Crystalline Complex, simultaneously with decompression breakdown of staurolite. Microprobe analyses of tourmalines reveal a compositional variation between Al-rich schorldravite to dravite (XFe 0.22-0.61; Al 5.88-6.77 apfu; Na 0.45-0.91 apfu). Tourmaline rims are typically enriched in Fe, usually enriched in Al and depleted in Mg, Na, Si relative to tourmaline cores.

In English

Tourmaline is a typical accessory mineral for most of micaschists in the Svratka Crystalline Complex. Based on petrographic and chemical data, two main generations of tourmaline have been distinguished. The first generation (tourmaline cores) corresponds to the prograde metamorphic event characterised by mineral assemblage Ms+Bt+Tu+/-Ky+/-St. The second generation of tourmaline (tourmaline rims) formed during exhumation of the Svratka Crystalline Complex, simultaneously with decompression breakdown of staurolite. Microprobe analyses of tourmalines reveal a compositional variation between Al-rich schorldravite to dravite (XFe 0.22-0.61; Al 5.88-6.77 apfu; Na 0.45-0.91 apfu). Tourmaline rims are typically enriched in Fe, usually enriched in Al and depleted in Mg, Na, Si relative to tourmaline cores.