Results 21 to 30 of about 7,282 (216)
Rare earth element abundances in carbonatites and fenites of the Newania complex, Rajasthan, India [PDF]
Bulletin of the Geological Society of Finland, 1989 The Newania carbonatite is intrusive into the Untala granite-gneiss of Precambrian age. An aureole of dominantly sodic fenites has been developed around the carbonatite.
S.G. Viladkar, P.B. Pawaskar
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The carbonatites of Amba Dongar, Gujarat, India [PDF]
Bulletin of the Geological Society of Finland, 1981 The geology, petrography and major and trace element geochemistry of Amba Dongar carbonatites are described. The ring structure of Amba Dongar carbonatite-alkalic complex has a central core of basalt collared by carbonatite breccia which in turn is ...
S.G. Viladkar
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Геодинамика и тектонофизика, 2022 The mineralogical and geochemical features, as well as the sequence of formation of aillikite and calcite carbonatite (CC) with pyrochlore are described for the massif of alkaline ultramafic carbonatite complexes Belaya Zima located in East Siberia ...
S. M. Zhmodik +5 more
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Evolution of Carbonatite Magmas in the Upper Mantle and Crust
Elements, 2021 Carbonatites are the most silica-poor magmas known and are amongst Earth’s most enigmatic igneous rocks. They crystallise to rocks dominated by the carbonate minerals calcite and dolomite.
G. Yaxley, B. Kjarsgaard, A. Jaques
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Economic Geology, 2022 Bull Hill is a carbonatite diatreme within the Paleogene Bear Lodge Carbonatite Complex in Wyoming, USA. Rare earth element (REE)-bearing carbonate, fluorocarbonate, phosphate, and oxide minerals occur within near-vertical carbonatite dikes on the ...
Mandi Hutchinson +3 more
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Геодинамика и тектонофизика, 2022 The Ilmeno-Vishnevogorsky miaskite-phenite-carbonatite complex (IVС), located in the Urals folded region, is a representative of "linear type" carbonatite complexes, with which Nb-Zr deposits are associated.
I. L. Nedosekova +3 more
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Записки Горного института, 2022 The article presents the results of study of the Ilmeno-Vishnevogorsky and Buldym carbonatite complexes in the Urals. It has been established that the carbonatites of the Ilmeno-Vishnevogorsky complex are represented by high-temperature ...
Irina L. Nedosekova
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Economic Geology, 2021 Mountain Pass is the site of the most economically important rare earth element (REE) deposits in the United States. Mesoproterozoic alkaline intrusions are spatiotemporally associated with a composite carbonatite stock that hosts REE ore ...
K. Watts, G. Haxel, David M. Miller
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Enrichment of heavy REE and Th in carbonatite-derived fenite breccia
Geological Magazine, 2021 Enrichment of the heavy rare earth elements (HREE) in carbonatites is rare as carbonatite petrogenesis favours the light (L)REE. We describe HREE enrichment in fenitized phonolite breccia, focusing on small satellite occurrences 1–2 km from the Songwe ...
S. Broom-Fendley +7 more
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Alkaline lamprophyres from the Sokli complex, northern Finland [PDF]
Bulletin of the Geological Society of Finland, 1978 Alkaline lamprophyric dykes in the Sokli carbonatite complex closely resemble kimberlites in mineralogical and chemical composition. Mineralogically, they differ from kimberlites by the presence of high-manganese ilmenite and richterite, and the absence ...
H. Vartiainen, P. Kresten, Y. Kafkas
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