Neogene ultrapotassic-potassic volcanic association in the Vardar zone (Macedonia)

Yanev, Yotzo and Boev, Blazo and Doglioni, C. and Innocenti, Fabrizio and Manetti, Piero and Lepitkova, Sonja (2003) Neogene ultrapotassic-potassic volcanic association in the Vardar zone (Macedonia). Comptes Rendus de l'Academie Bulgare des Sciences, 56 (4). pp. 53-58.

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The studied volcanic rocks in Kumanovo, Sveti Nikole and Demir kapija areas are of Late Miocene - Pilocene age and potassic to ultrapotassic character (Romanian type). They have been clasified as phonotephrites, shoeshoites and latites with high Mg# (> 70) and high Ni and Cr contents indicative of their primitive nature. The volcanics contain phenocrists of Fo - rich olivine, diopside to augite, phlogopite to Ba - and Ti - rich biotete (close to a kinoshitalite) in a groundmass consisting of microlites of the same minerals + leucite. Ti - magnetite +-ilmenite enclosed by Na - sanidine and/or anorthose. The rocks are significantly enriched in LILE and show negative Ta, Nb, Ti an positive Pb anomalies. The trace elements distribution for ultrapotassic varieties

Item Type: Article
Uncontrolled Keywords: Macedonia, Vardar Zone, ultrapotassic rock, petrological characteristics, isotopes
Subjects: Natural sciences > Physical sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Blazo Boev
Date Deposited: 20 Nov 2012 11:01
Last Modified: 21 Oct 2014 13:09

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