Results 61 to 70 of about 296 (107)

Petrogenesis of a Newly Discovered ∼1.1 Ga Aillikite, Carbonate-Rich Kimberlite, and Carbonatite Association on the Northern Margin of the Mid-Continental Rift System, Ontario, Canada

Precambrian Research
In this study, we present new field, petrographic, and whole-rock major and trace element, and Nd–Pb–Sr radiogenic isotope data for a newly discovered aillikite, carbonate-rich kimberlite, and carbonatite association on the northern shore of Lake ...
Robert Frei, Ali Polat
exaly   +4 more sources

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Olivine From Namuaiy Pipe Aillikite, Kola Alkaline Province: The Primary Melt Evolution and Relation to Kimberlite Magmatism

Doklady Earth Sciences
This study presents petrographic and mineral chemical data for olivine in aillikites from the Namuaiy pipe intruded into the Khibiny Massif, the Kola Alkaline Carbonatite Province.
Andrei Arzamastsev, V O Yapaskurt, N M Lebedeva   +2 more
exaly   +3 more sources

Distribution of Kimberlite and Aillikite in the Diamond Province of Southern West Greenland: A Regional Perspective Based on Groundmass Mineral Chemistry and Bulk Compositions

Lithos, 2009
A regional study of dike and sill occurrences of kimberlitic rocks in terms of xenolith and megacryst assemblages from the diamond province in southern West Greenland demonstrates very systematic variation in the composition of melts across the margin of the Archaean core of the North Atlantic craton.
Karina K. Sand, Troels F.D. Nielsen, Karsten Secher   +2 more
exaly   +3 more sources

Petrology of the Abloviak Aillikite Dykes, New Québec: Evidence for a Cambrian Diamondiferous Alkaline Province in Northeastern North America

Canadian Journal of Earth Sciences, 2000
A dozen ultramafic lamprophyre dykes have been identified in the eastern part of Ungava Bay, Québec. The dark grey dykes are composed of macrocrysts of olivine and phlogopite featuring tetraferriphlogopite rims. These minerals are included in a matrix consisting of fine-grained phlogopite, olivine, spinel, and interstitial carbonate.
S. Digonnet, N. Goulet, J. Bourne, R. Stevenson, D. Archibald   +4 more
exaly   +3 more sources

The Newly Discovered Jurassic Tikiusaaq Carbonatite-Aillikite Occurrence, West Greenland, and Some Remarks on Carbonatite–Kimberlite Relationships

Lithos, 2009
Abstract We discuss mineral chemistry data and report ten high-precision U–Pb (zircon, baddeleyite, pyrochlore, and perovskite) and Rb–Sr phlogopite ages for the newly discovered Tikiusaaq carbonatite intrusion and associated ultramafic dykes from the North Atlantic craton, West Greenland.
Antonio Simonetti, Larry M Heaman, Agnete Steenfelt   +2 more
exaly   +3 more sources

First Discovery of Paleoproterozoic Aillikite Dikes in Sarmatia: Geochemistry and Petrogenesis

Doklady Earth Sciences
Roman Terentiev, Alexander V Samsonov, N S Bazikov   +2 more
exaly   +3 more sources

Sr-Nd-Pb Isotopic Systematic and Geochronology of Ultramafic Alkaline Magmatism of the Southwestern Margin of the Siberian Craton: Metasomatism of the Sub-Continental Lithospheric Mantle Related to Subduction and Plume Events

Lithos, 2020
To provide new insights into the origin and evolution of ultramafic lamprophyres (UMLs) and their mantle source, we examined two UML (aillikite and damtjernite) occurrences of different ages in the western portion of the Siberian Craton (Ilbokich and ...
Adam Abersteiner, A A Nosova, D S Yudin
exaly   +3 more sources

Inwards-Younging of the Annular Twihinate Carbonatite-Aillikite Complex (Southern Morocco)

Goldschmidt2025 abstracts
Lucas Tatnell, Marco Fiorentini, M. Bouabdellah, Wissale Boukirou, Chris Fisher, Andrea Giuliani, I. Ezad, Laurent Sapor   +7 more
exaly   +3 more sources

The genetic link between kamafugite magmatism and alkaline–carbonatite complexes in the Late Cretaceous Alto Paranaíba Igneous Province, Central Brazil

Soviet Economy, 2022
The Late Cretaceous Mata da Corda Formation, located in the eastern part of the Alto Paranaíba Igneous Province (APIP), Central Brazil, is one of the few places on Earth where kamafugite melts reached the surface generating large volumes of lava ...
Felipe Velásquez Ruiz, P. Cordeiro, M. Reich, J. Motta, Carlos Cordeiro Ribeiro, T. Angerer, R. B. Bernardes   +6 more
semanticscholar   +3 more sources

Kimberlites and aillikites as probes of the continental lithospheric mantle

Lithos, 2009
ARTICLE I NFO Although the mantle xenoliths carried by kimberlites are the source of much of our information about the composition of the mantle beneath the continents, the compositions of kimberlites themselves have received little attention for the information they carry about the nature of the lithospheric mantle. This neglect in part reflects their
D. Francis, M. Patterson
semanticscholar   +2 more sources