The geochemistry and petrogenesis of the late-Cretaceous picrites and basalts of Curacao, Netherlands Antilles: a remnant of an oceanic plateau
Article Abstract:
Petrogenetic study of picrites and basalts of Curacao in the southern Caribbean Sea suggest that these rocks either originated from a homogeneous mantle source or from a heterogeneous source, after which mixing of magmas took place. Radiogenic data indicate contamination of the lavas by an altered oceanic crust during fractional crystallization. Two mechanisms for the generation of mantle-plume are presented. The first model suggests a sheet-like morphology for the plume. The other view supports eruption of high-MgO lava through the base of the lithosphere below a mid-oceanic ridge.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1996
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Geochemistry and isotope systematics of calc-alkaline volcanic rocks from the Saar-Nahe basin (SW Germany) - implications for Late-Variscan orogenic development
Article Abstract:
The calc-alkaline Saar Nahe volcanic suite is characterized by features that are commonly found in subduction-related volcanism. Among the characteristics is the porphyry-type ore deposits and hydrothermal alteration of felsic rock types. The volcanic suite could be understood in the context of subduction-related magmatism despite the fact that a postcollisional setting in central Europe is geologically proven.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1999
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Metasomatism in the subcontinental mantle beneath the Eastern Carpathians (Romania): New evidence from trace element geochemistry
Article Abstract:
Many trace elements in mantle xenoliths from alkaline lavas in the Eastern Carpathians in Romania have been analyzed. Xenoliths included spinel iherzolites, harzburgites, clinopyroxenites, amphibole veins and amphibole clinopyroxenites, with textures varying from porphyroclastic to granoblastic. Grain size was found to increased with increased equilibrium temperature following grain boundary migration.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1997
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