Record details

Title
    Burd Gol granite Massif as a typical product of the Late Cambrian post-orogenic magmatism in the SE part of the Lake Zone, Gobi Altay, SW Mongolia
Author
    Dash, Bat-Ulzii
    Gerdes, Axel
    Gilíková, Helena
    Hanžl, Pavel
    Hrdličková, Kristýna
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 55, č. 4
Pages
    18
Year
    2010
Thesaurus term
    Lake Zone, Burd Gol Massif, geochemistry, radiometric dating, Lower Palaeozoic continental sediments, Gobi Altay
Keyword
    Altay
    Burd
    Cambrian
    Gobi
    Gol
    Granite
    Lake
    Late
    Magmatism
    Massif
    Mongolia
    Post-orogenic
    Product
    SW
    Typical
    Zone
Abstract (in english)
   Intrusion of the Cambrian Burd Gol Granite Massif into the Proterozoic metamorphic rocks of the Zamtyn Nuruu and molasse-like sediments of the Boomyn Khudag culminated the collisional events of the Caledonian evolution in the SE part of the Lake Zone, Gobi Altay, SW Mongolia. The monotonous leucogranites of the Burd Gol Massif have a high-K geochemical signature with an intermediate initial Sr ratio (87Sr/86Sr510 = 0.7064) and rather unradiogenic Nd ( = -1.5 and -0.2). The ICP-MS U-Th-Pb dating of monazites and zircons yields intrusive ages between 506.4 ? 5.4 and 513.4 ? 4.3 Ma. The final stage of magmatic activity is documented by the Ar-Ar dating of muscovite from a pegmatite dyke at 485.1 ? 3.2 Ma. The granites intruded and thermally influenced the terrestrial clastic sediments of the Boomyn Khudag Formation. These new data argue against the previously assumed Permian age of the Burd Gol Massif and illustrates the terrestrial evolution in this part of the Lake Zone during the Camb
   rian.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014