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Constraining the Components of the Kerguelen Mantle Plume: A Hf-Pb-Sr-Nd Isotopic Study of Picrites and High-MgO Basalts From the Kerguelen Archipelago

Geochemistry, Geophysics, Geosystems, 2005
We report geochemical and Hf-Pb-Sr-Nd isotopic analyses of a suite of picrites and associated high-MgO volcanic rocks (6-17 wt.% MgO) from the Kerguelen Archipelago, which are rare compared to other oceanic islands, to better constrain the nature and the
James Scoates, Dominique Weis, André Giret   +2 more
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CO2 and the eruptibility of picrite and komatiite

Lithos, 1995
Abstract A tholeiitic picrite erupted from the summit region of Kilauea volcano, Hawaii in 1959. Work by Wright, Helz and Schwindinger and Anderson shows that the 1959 magma was a mixture of new, hot, MgO-rich magma that rose through and mixed with cooler stored magma causing crystallization of abundant olivine phenocrysts.
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Komatiites and picrites: evidence that the ‘plume’ source is depleted

Earth and Planetary Science Letters, 1994
High-temperature magmas such as picrites and komatiites are candidates for the material in the hot axial region of mantle plumes. In current plume theories these magmas should have an enriched ocean-island basalt (OIB) type chemistry. High MgO magmas, however, are often more like depleted mid-ocean ridge basalts (MORB) in trace element and isotopic ...
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Note on a Picrite from the Liskeard District

Mineralogical Magazine and Journal of the Mineralogical Society, 1888
Specimens of this rock were presented a short time since to the British Museum by the Earl of St. Germans, and Mr. T. Davies, knowing my interest in pierites and peridotites, kindly requested me to examine them and communicate the results to the Mineralogical Society. The rock occurs, as I am informed, in boulders between Menheniot and St. Germans. The
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Partitioning of nickel between immiscible picritic liquids

Earth and Planetary Science Letters, 1977
Proterozoic lavas from the Ventersdorp Supergroup in South Africa display liquid immiscibility textures with ocelli up to 15 cm in diameter. The magmas are of an unusual high-magnesia, but quartz-normative, composition. The high silica and high magnesia content may cause the liquid immiscibility, producing a “pyroxene-type” and “tridymite-type ...
R. Grant Cawthorn, T.S. McCarthy
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Picritic magmas and the Rum ultramafic complex, Scotland

Geological Magazine, 2002
Three small picritic dykes, intruded at a late stage in the evolution of the Rum basic–ultra-basic complex, Inner Hebrides, shed new light on the nature of the magmas responsible for the main complex. The magmas are of transitional (mildly alkalic) type, generated by relatively small-fraction (6–7%) melting of a depleted mantle source.
Upton, B.G.J., Skovgaard, Anna Cecilie, McClurg, J., Kirstein, L., Cheadle, M., Emeleus, C.H., Wadsworth, W.J., Fallick, A.E.   +7 more
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Hornblende, gabbros and picrites at Rhiw, Caernarvonshire

Geological Journal, 1970
AbstractThree hornblende‐bearing intrusive masses consisting mainly of cumulate rocks derived from a water‐rich, alkali‐basalt magma are described. They probably all belong to one Lower Palaeozoic 'sill‐like' intrusion with an original sloping floor.
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Metamorphism and melting of picritic crust in the early Earth

Lithos, 2014
Abstract Partial melting experiments with models of Archean oceanic crust (MAOC; with 11, 13 and 15 wt.% MgO) are used to investigate the role of metamorphism and melting of primary picritic compositions in the formation of TTG-like melts and continental crust on the early Earth.
Karen Ziaja, Stephen F. Foley, Richard W. White, Stephan Buhre   +3 more
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Picrite basalts of talnakh ore field

Chemical Engineering
The processes of melting and crystallization of Si-Al-Ti-Fe-Mg-Ca-Na-K-O system which is picrobasalt - ultrabasic volcanic rock of the subparty of normal alkaline rocks (35% ≤ SiO2 ≤ 45%, 0% ≤ (Na2O+K2O) ≤ 2%) have been studied by methods of physical-chemical computer modeling. The total content of Na2O and K2O in the rock does not exceed 2%.
S.V. Fomichyov, V.A. Krenyov, E.N. Pechyonkina, E.I. Berbekova   +3 more
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The eruption of komatiites and picrites in preference to primitive basalts

Earth and Planetary Science Letters, 1991
Abstract Many Archaean greenstone and post-Archaean flood-basalt provinces exhibit flows of komatiites or picrites in close spatial and temporal association with fractionated basalts. It follows that picrites and komatiites can erupt through the same crustal sections in which basaltic magmas apparently pond and fractionate.
John R. Lister, Ian H. Campbell, Ross C. Kerr   +2 more
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