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Subduction-related shoshonitic and ultrapotassic magmatism: a study of Siluro-Ordovician syenites from the Scottish Caledonides
Syenites are important or predominant components of several plutonic complexes, emplaced between 456 and 415 Ma along the NW margin of the Caledonian...
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The Vanuatu Island Arc: An Outline of the Stratigraphy, Structure, and Petrology
Vanuatu (formerly the New Hebrides Anglo—French Condominium) forms one sector of a Cretaceous to Recent island arc system extending from New Britain...
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Solomon Islands
Solomon Islands form part of a complex of Melanesian island arcs and marginal basins that extend in a southeasterly direction across the southwest...
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Piezomagnetic monitoring in the South Pacific region
Data from an array of piezomagnetic stations in the South Pacific Islands indicate that noise limitations on piezomagnetic stress monitoring reported...
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Field setting, mineralogy, chemistry, and genesis of arc picrites, New Georgia, Solomon Islands
The field setting, petrography, mineralogy, and geochemistry of a suite of picrite basalts and related magnesian olivine tholeiites (New Georgia arc...
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Pacific Plate Motion Recorded by Linear Volcanic Chains
Seamounts and islands are quite common features of the deep-ocean basins, particularly the Pacific Basin. A conspicuous but relatively small number...
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Earthquake distribution and volcanism in Kamchatka, Kurile Islands, and Hokkaido Part 3: Southern Kuriles and Hokkaido
The morphology of the Wadati-Benioff zone in the region of Southern Kuriles and Hokkaido, based on the distribution of 4015 earthquake foci, verified...
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The origin of reversed geochemical zoning in the northern New Hebrides volcanic arc
Integration of petrographic and geochemical data on each island in the Banks Group, northern Vanuatu (New Hebrides) has revealed a decrease in K 2 O...
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Quaternary Pisoids of Lau, Fiji
Pisoids, concentrically laminated grains between 2 mm and 10 mm in diameter, originate in a variety of environments and the word pisoid is now seldom...
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Three Kings Ridge: a west-facing arc
The Three Kings Ridge has been described as a remnant arc or an east-facing arc on the western side of the South Fiji Basin under which symmetric...
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d'Entrecasteaux Zone, trench and western chain of the central New Hebrides island arc: Their significance and tectonic relationship
The absence of a trench and the existence of a separate, western chain of islands in the central New Hebrides island arc are a consequence of earlier...
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The Plate Tectonic Connection
The Earth’s surface has four plate tectonic environments: divergent, convergent, and transform fault plate boundaries, and intra-plate locations....
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Spatial and Temporal Variations in the Composition of Orogenic Andesites
Comparing orogenic andesites within and between volcanic arcs or over time requires (1) choosing a reference point such as a specified wt.% SiO2 or...
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Geophysical Setting of Volcanism at Convergent Plate Boundaries
Active volcanoes occur at topographic highs approximately 60 to 500 km from convergent plate boundaries which usually are associated with ocean...
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Bulk Chemical Composition of Orogenic Andesites
Bulk chemical analyses of andesites are used primarily in two ways to evaluate andesite origins. First, average elemental and isotopic compositions...
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Andesite Magmas, Ejecta, Eruptions, and Volcanoes
Studies of the tectonic significance, petrography, and chemical composition of andesites have been more common than detailed investigations of the...