Journal ArticleDOI
Geochemical characteristics of the south Tuscany (Italy) volcanic province: constraints on lava petrogenesis
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In this paper, three suites of volcanic rocks from Radicofani, Mts. Cimini and Mt. Amiata (south Tuscany, Italy) were analyzed for major and trace element contents and Sr isotopic composition.About:
This article is published in Chemical Geology.The article was published on 1984-03-01. It has received 59 citations till now. The article focuses on the topics: Volcanic rock & Primitive mantle.read more
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The ultrapotassic rocks: Characteristics, classification, and constraints for petrogenetic models
TL;DR: In this paper, the chemical properties of ultrapotassic rocks are defined using the chemical screens K 2 O > 3 wt.%, MgO > 3 Wt.% and Na 2 O/Na 2 O 2 > 2 for whole-rock analyses.
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The geochemistry of potassic lavas from Vulsini, central Italy and implications for mantle enrichment processes beneath the Roman region
TL;DR: In this article, major and trace element variations within the high-K series are consistent with fractional crystallisation from a parental magma similar to the most magnesian leucitites.
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Petrology and geochemistry of potassic and ultrapotassic volcanism in central Italy: petrogenesis and inferences on the evolution of the mantle sources
TL;DR: In this article, trace element, Sr isotopic and mineral chemical data are reported for mafic volcanic rocks (Mg-value ⩾ 65) from the northern-central sector of the potassic volcanic belt of Central Italy.
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Geochemical discrimination between shoshonitic and potassic volcanic rocks in different tectonic settings: A pilot study
TL;DR: In this article, the authors presented new diagrams based on immobile elements (Al, Ti, P, Y, Zr, Nb, La, Ce, Hf) for discriminating the tectonic setting of PVRs from their geochemistry.
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The geochemistry and petrogenesis of K-rich alkaline volcanics from the Batu Tara volcano, eastern Sunda arc
TL;DR: In this paper, major and trace element and isotopic data for leucite basanite and leucitic tephrite dykes from the Batu Tara volcano, eastern Sunda arc are presented.
References
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Trace element and isotopic effects of combined wallrock assimilation and fractional crystallization
TL;DR: In this paper, the mass assimilation rate is an arbitrary fraction(r) of the fractional crystallization rate, where r < 1 is a combination of zone refining and fractional scaling.
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The effects of assimilation of country rocks by magmas on 18O/16O and 87Sr/86Sr systematics in igneous rocks
TL;DR: In this article, a variety of oxygen and strontium isotope mixing curves were calculated for this process of combined assimilation-fractional crystallization, and the positions and characteristics of the resultant curves on δ18O-87Sr/86Sr diagrams markedly diverged from simple two end-member mixing relationships.
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Characteristics and tectonic setting of the shoshonite rock association
TL;DR: The shoshonite association as mentioned in this paper is characterized by hypersthene-olivine normative basalts, low iron enrichment, high Na2O + K2O, high content of light ion lithophile elements, high but variable Al2O3, high Fe 2O3/FeO and low TiO2.
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A variably veined suboceanic upper mantle—Genetic significance for mid-ocean ridge basalts from geochemical evidence
TL;DR: A comparison of the trace-element abundances and radiogenic isotope ratios in oceanic basalts and the primordial mantle suggests that the present suboceanic upper mantle has undergone depletion and, in some places, recent re-enrichment events as discussed by the authors.
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A simple method to evaluate the matrix effects in X-Ray fluorescence analysis
TL;DR: In this article, a method for computing the matrix effects coefficient of H 2O, Na2O, MgO, Al2O3, SiO2, K2O.
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