Record details

Title
    Phosphorus and rubidium in alkali feldspars: case studies and possible genetic interpretation
Statement of responsibility
    Karel Breiter, Jiří Frýda, Jaromír Leichmann
Author
    Breiter, Karel
    Breiter, Karel, 1956-
    Frýda, Jiří
    Leichmann, Jaromír
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Bulletin of the Czech Geological Survey-Věstník Českého geologického ústavu
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Roč. 77, č. 2
Pages
    12
    s. 93-104
Year
    2002
Notes
    8 obr., 6 tab., 31 bibl.
    il.
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    chemismus hornin
    fosfor
    granit
    krušnohorský pluton
    krystalizace frakcionovaná
    magmatismus
    rubidium
    živec alkalický
Thesaurus term
    alkali feldspar granite, pegmatite, chemical composition, alkali feldspar group, magmatism, fractional crystallization, phosphorus, rubidium
Geographical name
    Beauvoir (Francie)
    ČR-Čechy
    Francie
    Krušné hory
    Podlesí (Karlovy Vary)
    SRN-Bayern
    Vernéřov (Cheb)
Keyword
    Alkali
    Case
    Feldspars
    Genetic
    Interpretation
    Phosphorus
    Possible
    Rubidium
    Studies
Abstract (in english)
   Potassium feldspar (Kfs) and albite (Ab) are major hosts of the phosphorus in peraluminous highly fractionated granitic systems. The Kfs is also an important carrier of Rb. The absolute contents of P and Rb, their homogeneous zoned, or disturbeddistribution within individual Kfs and Ab crystals, the ratio of the whole rock and Kfs-contents and the ratio of P-contents of Kfs and albite can serve as useful indicators of the grade of parental magma fractionation and late-magmatic signature duringand/or post-magmatic crystal-fluid reaction. The P- and Rb-distribution in feldspars were studied in four peraluminous granitic systems being quite different in intensity of the late- to post-magmatic fluid-related processes.Rubidium is firmlybound in the Kfs-lattice and preserves well its post-magmatic processes. In contrast, phosphorus can be easily released from the feldspar lattice and P-content serves as a sensitive indicator of the late- and/or post-magmatic fluid-related reactions.

   Potassium feldspar (Kfs) and albiate (Ab) are major hosts of phosphorus in peraluminous highly fractionated granitic systems. Kfs is also important carrier of Rb. The absolute contents of P and Rb, their homogeneous, zoned, or disturbed distribution within individual Kfs and Ab crystals, the ration of P contents in the whole rock (WR) vs. Kfs and the ratio of P contents in contents in Kfs vs. albite can serve as useful indicators of the grade of parental magma fractionation and late- and/or post magmatic crystal-fluid reaction. The P and Rb distributions in feldspars were studied in detail in four peraluminous granitic systems widely differing in intensity of influence of late- to post-magmatic fluids: dominantly magmatic Podlesí granite system (Bohemia), Beauvoir granite (France) influenced by late magmatic fluids, hydrothermaly altered Křížový Kámen granite (Bohemia - Bavaria) and a quartz-Kfs-amblygonite pegmatite-like dyke at Vernéřov (Bohemia).
   Rubidium is firmly bound in the Kfs lattice and preserves well its magmatic signature during post-magmatic pocesses. In contrast, phosphorus can be easily released from the feldspar lattice and P content serves as a sensitive indicator of the late- and/or post-magmatic fluid-related reactions
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
    ČGS (UNM)
Source format
    R
    U
Entered date
    28. 3. 2008
Import date
    8. 8. 2012
    15. 10. 2014