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Apatite with lamellae of sulfide and other phases in ultrahigh-pressure eclogites from Nove Dvory, Moldanubian Zone, Czech Republic

Shah Wali Faryad, Radim Jedlicka and Maria Perraki
Apatite with lamellae of sulfide and other phases in ultrahigh-pressure eclogites from Nove Dvory, Moldanubian Zone, Czech Republic
Mineralogical Magazine and Journal of the Mineralogical Society (February 2019) 83 (1): 95-105

Abstract

Exsolution lamellae of baryte, Fe sulfides, Cu sulfides and Fe oxides were observed in apatite enclosed in garnet and omphacite and their intergranular spaces in ultrahigh-pressure eclogite in the Moldanubian Zone, Czech Republic. Micro-textural relations and compositional mapping of the apatite indicates a close relationship between the density of the exsolution lamellae and compositional domains that are rich in sulfur and iron. No relation between compositional domains and fluorine or chlorine content or any evidence of apatite metasomatisation was observed. On the basis of cathodoluminescence images, the compositional domains reflect sector zoning in apatite crystals by preferential uptake of elements due to differences in surface charge and morphology on the growth plane. It is concluded that the lamellae are products of exsolution in a closed system resulting from temperature decrease during metamorphism.


ISSN: 0369-0148
Coden: MNLMBB
Serial Title: Mineralogical Magazine and Journal of the Mineralogical Society
Serial Volume: 83
Serial Issue: 1
Title: Apatite with lamellae of sulfide and other phases in ultrahigh-pressure eclogites from Nove Dvory, Moldanubian Zone, Czech Republic
Affiliation: Charles University, Institute of Petrology and Structural Geology, Prague, Czech Republic
Pages: 95-105
Published: 201902
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
References: 51
Accession Number: 2019-026984
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N49°53'60" - N50°04'60", E15°11'60" - E15°25'00"
Secondary Affiliation: National Technical University of Athens, GRC, Greece
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201915
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