Carbonate Melts and Carbonatites

@inproceedings{Jones2012CarbonateMA,
  title={Carbonate Melts and Carbonatites},
  author={Adrian P. Jones},
  year={2012}
}
Carbonatites are familiar to students of petrology as rare igneous rocks formed predominantly of carbonate, whose only modern expression is a single active volcano that erupts strongly alkaline carbonate lavas with no direct match in Earth’s geological record (see Lengai movie in the electronic version of this chapter or on the MSA RiMG website). Based on their Sr-Nd-Pb isotopic data, stable isotopic compositions, noble gases, and experimental phase equilibria, they are derived from the mantle… Expand
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Structures and Transport Properties of CaCO3 Melts under Earth’s Mantle Conditions
Carbonatitic and carbonated silicate melts generated from melting in the mantle are the chief agents for liberating carbon from the solid Earth and exert important controls on Earth’s deep carbon… Expand
Italian carbonatite system: From mantle to ore-deposit
Abstract A new discovery of carbonatites at Pianciano, Ficoreto and Forcinelle in the Roman Region demonstrates that Italian carbonatites are not just isolated, mantle xenoliths-bearing, primitive… Expand
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Abstract Carbonatites are peculiar magmatic rocks with mantle-related genesis, commonly interpreted as the products of melting of CO2-bearing peridotites, or resulting from the chemical evolution of… Expand
A model for the activity of silica along the carbonatite–kimberlite–mellilitite–basanite melt compositional joint
Carbon dioxide and water, being present in the Earth’s mantle at concentration levels of tens to hundreds of ppm, greatly lower the peridotite solidus temperature and drastically modify the… Expand
Sediment-derived origin of the putative Munnar carbonatite, South India
Abstract Metacarbonate assemblages in high-grade metamorphic terranes often pose challenges when trying to distinguish between mantle-derived carbonatite and sedimentary carbonate protoliths. We… Expand
The Alnö Carbonatite Complex, Central Sweden
The Alnö igneous complex intruded local migmatites and granite country-rocks of Svecofennian age at *580 Ma and produced a suite of early alkaline silicate intrusives (e.g., ijolites, nepheline… Expand
Petrochronological Constraints on the Origin of the Mountain Pass Ultrapotassic and Carbonatite Intrusive Suite, California
Rare earth element (REE) ore-bearing carbonatite dikes and a stock at Mountain Pass, California, are spatially associated with a suite of ultrapotassic plutonic rocks, and it has been proposed that… Expand
Tetrahedrally coordinated carbonates in Earth's lower mantle.
TLDR
Experimental evidence is presented that under the sufficiently high pressures and high temperatures existing in the lower mantle, ferromagnesian carbonates transform to a phase with tetrahedrally coordinated carbons, which may have significant implications for carbon reservoirs and fluxes, and the global geodynamic carbon cycle. Expand
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References

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TLDR
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Diamonds and the Geology of Mantle Carbon
### Introduction Earth’s carbon, derived from planetesimals in the 1 AU region during accretion of the Solar System, still retains similarities to carbon found in meteorites (Marty et al. 2013) even… Expand
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