Record details

Title
    Constraining the P-T path of a MORB-type eclogite using pseudosections, garnet zoning and garnet-clinopyroxene thermometry: an example from the Bohemian Massif
Other titles
    viz název výsledku v anglickém jazyce
Author
    ,
    Powell, Roger
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Metamorphic Geology
Vol./nr.
    Roč. 23, č. 8
Pages
    19
Year
    2005
Thesaurus term
    Bohemian Massif, garnet-clinopyroxene thermometry, MORB eclogite, prograde garnet zoning, pseudosection
Keyword
    Bohemian
    Constraining
    Eclogite
    Example
    Garnet
    Garnet-clinopyroxene
    Massif
    MORB-type
    P-T
    Path
    Pseudosections
    Thermometry
    Using
    Zoning
Abstract (in czech)
   viz popis výsledku v původním jazyce
Abstract (in english)
   A mid-ocean ridge basalt (MORB)-type eclogite from the Moldanubian domain in the Bohemian Massif retains evidence of its prograde path in the form of inclusions of hornblende, plagioclase, clinopyroxene, titanite, ilmenite and rutile preserved in zoned garnet. Prograde zoning involves a flat grossular core followed by a grossular spike and decrease at the rim, whereas Fe/(Fe + Mg) is also flat in the core and then decreases at the rim. In a pseudosection for H2O-saturated conditions, garnet with such a zoning grows along an isothermal burial path at c. 750 degrees C from 10 kbar in the assemblage plagioclase-hornblende-diopsidic clinopyroxene-quartz, then in hornblende-diopsidic clinopyroxene-quartz, and ends its growth at 17-18 kbar. From this point, there is no pseudosection-based information on further increase in pressure or temperature.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014