Počet záznamov: 1
Chromium- and nickel-rich micas and associated minerals in listvenite from the Muranska Zdychava, Slovakia: products of hydrothermal metasomatic transformation of ultrabasic rock
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$a 10.3190/jgeosci.217 $2 DOI 100 $a 20170124 2016 m y slo 03 ba 101 0-
$a eng 102 $a CZ 200 1-
$a Chromium- and nickel-rich micas and associated minerals in listvenite from the Muranska Zdychava, Slovakia: products of hydrothermal metasomatic transformation of ultrabasic rock $f Štefan Ferenc ... [et al.] 330 $a The Cr-Ni-rich micas, Ni-Co sulphide phases and associated minerals occur in a small body of listvenite, an extensively altered serpentinite, in Lower Palaeozoic paragneisses near Murnska Zdychava village in Slovensk Rudohorie Mts. (Veporic Superunit, central Slovakia). The main rock-forming minerals of the listvenite are magnesite, dolomite and a serpentine-group mineral, less frequently calcite, quartz and talc. Accessory minerals of the listvenite include Cr-Ni-rich micas, chromite, and Ni-Co-Fe-(Cu-Pb) sulphide minerals (pyrite, pyrrhotite, pentlandite, millerite, polydymite, violarite, siegenite, gersdorffite, cobaltite, chalcopyrite and galena). The micas from the Muranska Zdychava listvenite (Cr-Ni-rich illite to muscovite and Ni-dominant trioctahedral mica) contain the highest Ni concentrations ever reported in the mica-group minerals (up to 22.8 wt. % NiO or 1.46 apfu Ni). The Cr concentrations are also relatively high (up to 11.0 wt. % Cr2O3 or 0.64 apfu). Compositional variations in both Cr-Ni-rich mica minerals are characterized by the negative Cr vs. Ni correlation that indicates a dominant role of 2(O)M(3)+ + (O) = 3(O)M(2)+ and M-O(3)+ + Al-T = M-O(2)+ + Si-T substitution mechanisms. Chromite is dominated by Fe2+ (0.82-0.90 apfu) and Cr (1.38-1.79 apfu). 463 -1
$1 001 umb_un_cat*0295256 $1 011 $a 1802-6222 $1 011 $a 1803-1943 $1 200 1 $a Journal of Geosciences $v Vol. 61, no. 3 (2016), pp. 239-254 $1 210 $a Prague $c Czech Geological Society $d 2016 606 0-
$3 umb_un_auth*0202728 $a mineralizácia $X mineralization 606 0-
$3 umb_un_auth*0142844 $a sulfidické minerály 606 0-
$3 umb_un_auth*0202818 $a sulfidická mineralizácia $X sulfide mineralization 607 -1
$3 umb_un_auth*0098733 $a Západné Karpaty (pohorie) $X Western Carpathians Mountains 607 -1
$3 umb_un_auth*0257187 $a Muránska Zdychava (Slovensko) $X Muránska Zdychava (Slovakia) 615 $n 55 $a Geológia 675 $a 55 700 -1
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$a SK $b BB301 $g AACR2 $9 unimarc sk T85 $x existuji fulltexy
Počet záznamov: 1