Significance of Zr-in-Rutile Thermometry for Deducing the Decompression P–T Path of a Garnet–Clinopyroxene Granulite in the Moldanubian Zone of the Bohemian Massif

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00480051" target="_blank" >RIV/67985831:_____/17:00480051 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1093/petrology/egx050" target="_blank" >http://dx.doi.org/10.1093/petrology/egx050</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/petrology/egx050" target="_blank" >10.1093/petrology/egx050</a>

Result language

angličtina

Original language name

Significance of Zr-in-Rutile Thermometry for Deducing the Decompression P–T Path of a Garnet–Clinopyroxene Granulite in the Moldanubian Zone of the Bohemian Massif

Original language description

We apply Zr-in-rutile thermometry to a garnet-clinopyroxene (Grt-Cpx) granulite from the Moldanubian Zone of the Bohemian Massif. Three major metamorphic evolutionary stages are identified from the Grt-Cpx granulite. Application of Zr-in-rutile thermometry yields a temperature of ~830 °C at ~1.8 GPa for the early HP stage of granulite evolution. Rutile grains in the clinopyroxene-plagioclase domain of the matrix generally occur as small euhedral crystals and have higher Zr contents, corresponding to 1000–1050 °C at ~1.2 GPa using Zr-in-rutile thermometry. In contrast, those in the quartz-feldspar domains of the matrix occur as coarser and more elongated grains with lower Zr contents, yielding slightly lower temperatures. Si and Zr X-ray compositional mapping by electron microprobe reveals that rutile grains in both the domains were formed in quartz-bearing but zircon-free conditions. Thus, the Zr-in-rutile temperatures obtained for rutile grains in the matrix indicate the minimum estimates. Based on these results, we reveal that the studied Grt-Cpx granulite underwent significant heating by about 200 °C during the early stage of decompression from the peak pressure. This heating was caused by incorporation of the Grt-Cpx granulite into higher temperature felsic granulites rapidly exhumed from deeper parts of the continental collision zone.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Petrology

ISSN

0022-3530

e-ISSN

—

Volume of the periodical

58

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

26

Pages from-to

1173-1198

UT code for WoS article

000412822200006

EID of the result in the Scopus database

2-s2.0-85037833198