Geochemistry of coexisting alkaline and calc-alkaline volcanic rocks from northern Azerbaijan (N.W. Iran)

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doi: 10.1016/0377-0273(81)90026-3
Authors:Riou, R.; Dupuy, C.; Dostal, J.
Author Affiliations:Primary:
Univ. Saarlandes, Miner. Inst., Saarbrücken 6600, Federal Republic of Germany
USTL Cent. Geol. et Geophys., France
Saint Mary's Univ., Canada
Volume Title:Journal of Volcanology and Geothermal Research
Source:Journal of Volcanology and Geothermal Research, 11(2-4), p.253-275. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-0273
Publication Date:1981
Note:In English. 3 p. refs.; illus. incl. geol. sketch map, table
Summary:The Eocene volcanic rocks of N Azerbaijan are composed of four distinct associations: strongly undersaturated, alkaline, shoshonitic, and calc-alkaline. All four series are closely associated in space and time. They show many features common with rocks of orogenic zones such as low TiO2, MgO, Nb and high K2O, Ba, Sr, and light RE abundances. The rocks within each series are predominantly related by fractional crystallization. The contents of major and trace elements in the rocks are consistent with their derivation from an enriched upper mantle by variable degrees of partial melting. It is suggested that this enrichment process is related to a subduction zone accompanying the closure of the South Tethyan Sea during the Cretaceous, while melting occurred along deep-seated faults reactivated during Early Tertiary times. (Authors' abstract) [T.R.]
Subjects:Alkalic composition; Analcime; Andesites; Ankaramite; Basalts; Basanite; Calc-alkalic composition; Cenozoic; Differentiation; Eocene; Fractional crystallization; Framework silicates; Geochemistry; Igneous rocks; Latite; Magmas; Mantle; Metals; Paleogene; Partial melting; Petrology; Phonolites; Plate tectonics; Rare earths; Shoshonite; Silicates; Subduction; Tertiary; Trace elements; Trachyandesites; Ultramafic composition; Upper mantle; Volcanic rocks; Zeolite group; Asia; Azerbaijan region; Commonwealth of Independent States; Europe; Iran; Middle East; USSR; Shoshonitic composition
Abstract Numbers:82M/4341
Record ID:1984026098
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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