Journal ArticleDOI
A Guide to the Chemical Classification of the Common Volcanic Rocks
T. N. Irvine,W. R. A. Baragar +1 more
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TLDR
In this paper, a system was presented whereby volcanic rocks may be classified chemically as follows: Subalkaline Rocks:A.B. Tholeiitic basalt series:Tholeitic picrite-basalt; tholeiite, tholeitic andesite; dacite; rhyolite.Abstract:
A system is presented whereby volcanic rocks may be classified chemically as follows:I. Subalkaline Rocks:A. Tholeiitic basalt series:Tholeiitic picrite-basalt; tholeiite; tholeiitic andesite.B. Calc-alkali series:High-alumina basalt; andesite; dacite; rhyolite.II. Alkaline Rocks:A. Alkali olivine basalt series:(1) Alkalic picrite–basalt; ankaramite; alkali basalt; hawaiite; mugearite; benmorite; trachyte.(2) Alkalic picrite–basalt; ankaramite; alkali basalt; trachybasalt; tristanite; trachyte.B. Nephelinic, leucitic, and analcitic rocks.III. Peralkaline Rocks:pantellerite, commendite, etc.read more
Citations
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Journal ArticleDOI
A chemical classification of volcanic rocks based on the total alkali-silica diagram
Journal ArticleDOI
Naming materials in the magma/igneous rock system
TL;DR: In this article, a new comprehensive chemical classification of the plutonic rocks is introduced, which enables geoscientists to focus on the magma, the most important concept in igneous petrology.
Journal ArticleDOI
Crustal contributions to arc magmatism in the Andes of Central Chile
Wes Hildreth,Stephen Moorbath +1 more
TL;DR: In this article, 15 andesite-dacite stratovolcanoes on the volcanic front of a single segment of the Andean arc show along-arc changes in isotopic and elemental ratios that demonstrate large crustal contributions to magma genesis.
Journal ArticleDOI
Improved 206Pb/238U microprobe geochronology by the monitoring of a trace-element-related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards
Lance P. Black,Lance P. Black,Sandra L. Kamo,Charlotte M. Allen,Donald W. Davis,John N. Aleinikoff,John W. Valley,Roland Mundil,Ian H. Campbell,R. J. Korsch,Ian S. Williams,Chris Foudoulis +11 more
TL;DR: In this article, the authors investigated correlations between the age offsets and P, Sm and Nd abundances in the zircons, and concluded that the presence of Nd is not the primary cause of the apparent matrix effect.
Journal ArticleDOI
Experimental investigations of the role of H2O in calc-alkaline differentiation and subduction zone magmatism
TL;DR: The phase relations of natural aphyric high-alumina basalts and their intrusive equivalents were determined through rock-melting experiments at 2 kb, H2O-saturated with fO2 buffered at NNO.
References
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Journal ArticleDOI
Origin of Basalt Magmas: An Experimental Study of Natural and Synthetic Rock Systems
H. S. Yoder,C. E. Tilley +1 more
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Chemical Characteristics of Oceanic Basalts and the Upper Mantle
TL;DR: In this article, it was shown that oceanic tholeiites are either complete melts of the upper mantle or are generated from a mix of this tholeite and a magnesium-rich peridotite or dunite in proportions up to perhaps 1:4.
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Lateral variation of basalt magma type across continental margins and Island Arcs
TL;DR: In this paper, the lateral variation of quaternary basalt magmas in the Circum-Pacific belt and island arcs and also in Indonesia change continuously from less alkalic and more siliceous type (tholeiite) on the oceanic side to more alkaloic and less silicerous type (alkali olivine basalt) on a continental side.
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Origin of cenozoic petrographic provinces of Japan and surrounding areas
TL;DR: The boundary lines between the tholeiite and alkali petrographic provinces are located very closely to those between the areas where earthquakes occur at depths shallower than about 200 km and those for deeper ones as mentioned in this paper.
Journal ArticleDOI
The Volcanological Report of the Royal Society Expedition to Tristan da Cunha, 1962
TL;DR: The work of Harris and Le Maitre as discussed by the authors was carried out on the island of Tristan da Cunha in South Africa during the first half of 1962, where the effects of volcanic activity on the vegetation and the direct and indirect effect on the introduced and indigenous fauna were examined.