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The Pribilof Islands, Alaska, are located in the Bering Sea in a continental intraplate setting. In this study we examine the petrology and geochemistry of volcanic rocks from St. Paul (0·54–0·003 Ma) and St. George (2·8–1·4 Ma) Islands, the two largest Pribilof Islands. Rocks from St....
The composite intrusions of Drumadoon and An Cumhann crop out on the SE coast of the Isle of Arran, Scotland and form part of the larger British and Irish Palaeogene Igneous Province, a subset of the North Atlantic Igneous Province. The intrusions (shallow-level dykes and sills) comprise a...
A combined petrological, geochemical, and geochronological (Rb–Sr and Sm–Nd whole-rock, U–Pb and Lu–Hf zircon, and Ar–Ar hornblende) study on a section of pre-Witwatersrand basement drilled at the northwestern margin of the Witwatersrand Basin has revealed new insights into the nature...
The Breaksea Orthogneiss, a high- P component of the c. 126–116 Ma Western Fiordland Orthogneiss, has distinctive composite mafic layering and dyke structures in a monzodioritic host, mostly transposed into an intense, shallowly dipping S 1 foliation. Delicate centimetre- to metre-scale...
We studied the morphologies of olivine, clinopyroxene and plagioclase microcrysts in olivine-rich basalts from the December 2005 eruption at Piton de la Fournaise, to reconstruct the thermal history of the magma prior to reaching the surface. Olivine microcrysts and their melt inclusions show...
Felsic microgranular enclaves with structures indicating that they interacted in a plastic state with their chemically similar host granite are abundant in the Mauá Pluton, SE Brazil. Larger plagioclase xenocrysts are in textural disequilibrium with the enclave groundmass and show complex zoning...
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