Record details

    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
    Powell, Roger
Publication type
    článek v periodiku
Source title - serial
    Journal of Metamorphic Geology
    Roč. 23, č. 8
Thesaurus term
    Bohemian Massif, garnet-clinopyroxene thermometry, MORB eclogite, prograde garnet zoning, pseudosection
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.
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
Import date
    15. 10. 2014