Petrologic and Geochemical Characteristics of the Volcanic Rocks in the Bucim District

Stefanova, Violeta and Serafimovski, Todor and Nedelkov, Rosen and Kovachev, Veselin (2006) Petrologic and Geochemical Characteristics of the Volcanic Rocks in the Bucim District. Geologica Macedonica, 20. pp. 1-11. ISSN 0352-1206

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Abstract

The paper presents the latest data obtained during petrologic, mineralogical and geochemical studies carried out on the Tertiary volcanic rocks in the Bu~im district. The latest petrologic studies have determined trdchyandesites-Iatites and alkali trachyte-trachytes. Examinations on the chemical composition of individual mineralogical phases indicated that the plagioclases in the volcanic rocks are andesites and oligoclases; biotites are of the phlogopite-andesite series. Amphiboles are present as calcic amphiboles, pyroxenes are of the diopside-augite group, and calcic feldspars are present as sanidine. Geochemical studies indicated that the rocks are of the high calcic series, which is consistent with the calc-alkali characteristic of the volcanism. Examinations of the microelements indicated a pronounced positive Th and Y anomalies and light negative anomalies "for Nb and Ti02, which is a characteristic of subduction magmas.

Item Type:	Article
Subjects:	Natural sciences > Earth and related environmental sciences Natural sciences > Other natural sciences
Divisions:	Faculty of Natural and Technical Sciences
Depositing User:	Violeta Stefanova
Date Deposited:	18 Nov 2012 21:19
Last Modified:	27 Sep 2013 09:01
URI:	https://eprints.ugd.edu.mk/id/eprint/1094

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