Record details

Title
    Pegmatite dykes and quartz veins with tourmaline: an example of partial melting in the contact aureole of the Chandman Massif intrusion, SW Mongolia
Author
    Buriánek, David
    Hanžl, Pavel
    Hrdličková, Kristýna
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 56, č. 2011
Pages
    12
Year
    2011
Thesaurus term
    tourmaline, pegmatite, microchemistry, compositional evolution, Mongolian Altay Mts., SW Mongolia
Keyword
    Aureole
    Chandman
    Contact
    Dykes
    Example
    Intrusion
    Massif
    Melting
    Mongolia
    Partial
    Pegmatite
    Quartz
    SW
    Tourmaline
    Veins
Abstract (in english)
   Pegmatite dykes with tourmaline and quartz-tourmaline veins in the Chandman Khayrkhan Crystalline Complex are spatially related to the contact aureole of the Variscan granitoids of the Chandman Massif. Tourmalines are also present in pegmatites that intruded into the I-type granitoids of the Chandman Massif near the contact with surrounding migmatites. The fluid-present melting of metapelites in wall rocks of the I-type granodiorites and tonalities can be considered as the main process inducing the boron-rich granitic melt formation. Variations in chemical compositions of tourmaline from several pegmatite dykes, mainly in Na, Ca, Al, Fe and Mg, are interpreted as a result of fractionation of the parental melt. The quartz-tourmaline veins represent a product of crystallization of aqueous fluid exsolved from the pegmatite melt.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014