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Geological Society of America Bulletin, 1956
The carbonatites are essentially carbonate-silicate rock with a great variety of other minerals. In this review the writer stresses the field and geochemical relationships of the carbonatites and alkalic igneous rocks and concludes that carbonatites were deposited by carbonatic solutions having a wide range of temperature, pressure, and concentration ...
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The carbonatites are essentially carbonate-silicate rock with a great variety of other minerals. In this review the writer stresses the field and geochemical relationships of the carbonatites and alkalic igneous rocks and concludes that carbonatites were deposited by carbonatic solutions having a wide range of temperature, pressure, and concentration ...
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Geological Society, London, Special Publications, 1987
Summary Carbonatites found in strongly alkaline intra-plate petrographic volcanic provinces are associated with olivine-poor nephelinites and with phonolites. Olivine-rich nephelinites occur in basanitic and alkali basalt provinces, normally without carbonatites.
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Summary Carbonatites found in strongly alkaline intra-plate petrographic volcanic provinces are associated with olivine-poor nephelinites and with phonolites. Olivine-rich nephelinites occur in basanitic and alkali basalt provinces, normally without carbonatites.
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Geological Curator, 2014
Geological material is the most chemically diverse of all types of natural history collections. Each mineral assemblage will require a specific set of environmental parameters to ensure stability. Unfortunately these are not yet fully understood and it is widely recognised that there is no environmental condition which will be suitable for all.
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Geological material is the most chemically diverse of all types of natural history collections. Each mineral assemblage will require a specific set of environmental parameters to ensure stability. Unfortunately these are not yet fully understood and it is widely recognised that there is no environmental condition which will be suitable for all.
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Carbonatite-Alkaline Magma Immiscibility Conducing to Carbonatite REE Enrichment
2018Carbonatite is a particular type of magmatic rocks enriched in REE relative to the majority of igneous rocks. Among the numerous carbonatites referenced worldwide, only a few of them contain economic REE concentrations widely considered as resulting from late- to post- magmatic processes.
Nabyl, Zineb +6 more
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FENITES ASSOCIATED WITH CARBONATITES
The Canadian Mineralogist, 2008A review of occurrences of potassic and sodic fenitization around carbonatites is presented, including several new examples and oceanic ones. Taken in conjunction with the many examples quoted in the literature, conclusions are drawn that the K and Na contents of carbonatitic melts that induce fenitization are primary constituent parts of both ...
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Apatite from African carbonatites
Lithos, 1973Abstract Apatite from three African carbonatites (sovites) are of the carbonate-hyoxy-fluorapatite type with a marked similarity in composition and structural formula. However, apatite from an apatite-magnetite dyke, associated with a carbonatite complex, differs in Ca, P and trace element content.
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Mineralogy of carbonatite-breccia: Amba Dongar carbonatite diatreme, Gujarat, India
Carbonatite-breccia forms a major unit in the carbonatite-alkaline diatreme of the Amba Dongar carbonatite ring complex. In addition to the innermost part of the ring strucure, small and large plugs outside the ring structure are also formed in the form of discontinuous rings around the sövite.Schulzki, Jan +2 more
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