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Carbonatite

About: Carbonatite is a research topic. Over the lifetime, 2025 publications have been published within this topic receiving 54499 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors used trace element signatures of carbonatite melts responsible for modal metasomatism of peridotite xenoliths from the Olmani cinder cone, northern Tanzania.

717 citations

Journal ArticleDOI
01 Sep 1988-Nature
TL;DR: In this paper, the phase relationship of carbonate and amphibole-bearing peridotite (containing 0.3% H2O and 0.5-2.5% CO2) is investigated.
Abstract: Carbonatites are uncommon carbonate-rich rocks usually found in continental intra-plate regions and often associated with rifting. There has been much debate as to whether carbonatite magmas are primary melts derived from partial melting of mantle peridotite, or are formed by exsolution of an immiscible carbonate melt fraction from phonolitic or nephelinitic magmas. Our experiments on the phase relationships of carbonate and amphibole-bearing peridotite (containing 0.3% H2O and 0.5–2.5% CO2) show that sodic dolomitic carbonatite magma coexists with an amphibole lherzolite assemblage in a field ranging from 21 to 30 kbar and 930 to 1,080 °C, spanning a pressure and temperature interval between the solidus and the amphibole breakdown and melting curve. Thus primary carbonatite melts may occur under suitable geothermal conditions. The nature of the peridotite solidus and of the melting reactions differ considerably from published models1–3. The carbonatite melt composition, determined by a series of 'sandwich' experiments, was found to be rich in Na, Mg, Ca and Fe, with a small dissolved silicate content. This melt quenches to an assemblage of dolomite and Na–Mg carbonate minerals, producing textures similar to those preserved in samples from Oldoinyo Lengai4, Homa mountains, Tanzania5 and Kaiserstuhl, Germany6.

619 citations

Book
01 Jan 1989
TL;DR: Carbonatites - nomenclature, average chemical compositions and element distribution, A.R.Woolley and D.C.Kempe the spatial and temporal distribution of carbonatites, D.H.Wyllie mantle metasomes and the kinship between carbonatite and kimberlites as mentioned in this paper.
Abstract: Carbonatites - nomenclature, average chemical compositions and element distribution, A.R.Woolley & D.R.C.Kempe the spatial and temporal distribution of carbonatites, A.R.Woolley field relations of carbonatites, D.S.Barker extrusive carbonatites and their significance, J.Keller carbonatite magma - properties and processes, A.H.Treiman pyrochlore, apatite and amphibole - distinctive minerals in carbonatite, D.D.Hogarth nature of economic mineralization in carbonatites and related rocks, A.N.Mariano nature and structural relationships of carbonatites from Southwest and West Tanzania, P.van Straaten carbonatites in a continental margin environment - the Canadian Cordillera, J.Pell & T.Hoy Phalaborwa - a saga of magmatism, metasomatism and miscibility, S.C.Eriksson sodium carbonatite extrusions from Oldoinyo Lengai, Tanzania - implications for carbonatite complex genesis, J.B.Dawson neodymium and Sr isotope geochemistry of carbonatites, K.Bell & J.Blenkinsop stable isotope variations in carbonatites, P.Deines lead isotope relationships in carbonatites and alkalic complexes - an overview, S.T.Kwon et al the genesis of carbonatites by immiscibility, B.A.Kjarsgaard & D.L.Hamilton the behaviour of trace elements in the evolution of carbonatites, D.L.Hamilton et al diversification of carbonatite, M.J.Le Bas upper-mantle enrichment by kimberlitic or carbonatitic magmatism, A.P.Jones a model of mantle metasomatism by carbonated alkaline melts - trace-element and isotopic compositions of mantle source regions of carbonatite and other continental igneous rocks, J.K.Meen et al origin of carbonatites - evidence from phase equilibrium studies, P.J.Wyllie mantle metasomes and the kinship between carbonatites and kimberlites, S.E.Haggerty carbonatites, primary melts and mantle dynamics, D.H.Eggler the origin and evolution of carbonatite magmas, J.Gittins.

524 citations

Journal ArticleDOI
TL;DR: In this paper, an isotope analysis of carbonatite calcites from the Laacher See district is presented, showing that the carbonatites are derived from gabbroic or ultramafic rocks at depth.

518 citations

Journal ArticleDOI
TL;DR: In this paper, over 700 apatite grains from a range of rock types have been analysed by laser-ablation microprobe ICPMS for 28 trace elements, to investigate the potential usefulness of apatites as an indicator mineral in mineral exploration.

484 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202396
2022220
2021106
202083
201979
201859