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The Contact Aureole nn Tinos (Cyclades, Greece). 1. Field Relationships, Petrography and P-T Conditions
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2367583
Author(s) Brocker, M.; Franz, L.
Author(s) at UniBasel Franz, Leander
Year 1994
Title The Contact Aureole nn Tinos (Cyclades, Greece). 1. Field Relationships, Petrography and P-T Conditions
Journal Chemie der Erde-Geochemistry
Volume 54
Number 4
Pages / Article-Number 262-280
Abstract On Tinos (Cyclades, Greece), the intrusion of Miocene granitoids caused a contact metamorphic overprint of blueschist- and greenschist-facies country rocks. The width of the contact aureole ranges from about 600-2200 m. In metabasic rocks an oligoclase-/andesine-in isograd was recognized which separates a regional metamorphic albite-actinolite zone from a contact metamorphic plagioclase-hornblende zone. In pelitic rocks, a contact metamorphic biotite zone was mapped. Application of conventional mineral geothermobarometry yielded in most cases unreasonable temperature and pressure estimates which either indicate incomplete re-equilibration at the thermal peak or which result from considerable resetting during retrograde cooling. Temperatures in the aureole are estimated at about 475-degrees-C in the peripheral zones to about 660-degrees-C close to the granite contact. Pressure during the thermal overprint is estimated at about 3 kbar.
Publisher Urban & Fischer
ISSN/ISBN 0009-2819
edoc-URL https://edoc.unibas.ch/81552/
Full Text on edoc No
ISI-Number 1994PY43400003
Document type (ISI) article
 
   

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