Primary rare earth element enrichment in carbonatites: Evidence from melt inclusions in Ulgii Khiid carbonatite,Mongolia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F41601670%3A_____%2F20%3AN0000037" target="_blank" >RIV/41601670:_____/20:N0000037 - isvavai.cz</a>

Alternative codes found

RIV/62156489:43210/20:43917430 RIV/62156489:43410/20:43917430 RIV/00216305:26310/20:PU137574

Result on the web

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0169136818304359?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0169136818304359?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.oregeorev.2019.103294" target="_blank" >10.1016/j.oregeorev.2019.103294</a>

Result language

angličtina

Original language name

Primary rare earth element enrichment in carbonatites: Evidence from melt inclusions in Ulgii Khiid carbonatite,Mongolia

Original language description

Carbonatites are abundant in the rare earth elements (REE), and they host the most important REE resources in theworld. However, the mechanisms that concentrate these elements during carbonatitic magmatic processes are stillpoorly constrained. Here, we report the occurrence of apatite-hosted melt inclusions from the Ulgii Khiidcarbonatites, Mongolia, and use these to reconstruct the evolution of REE concentrations and patterns in early,primary carbonatite magma. The melt inclusions consist of a varied polycrystalline assemblage of daughter minerals,including calcite, diopside, phlogopite, magnetite, pyrite, monazite, parisite, and a phosphate glass which isremarkably enriched in REE. Heating-quenching experiments show that the homogenization temperatures of theinclusions are above 1200 °C and produce three immiscible liquid phases (i.e., phosphate-, silicate-, and Fe-silicate-melt). The phosphate melt has much higher REE content than the silicate melts. We, therefore, suggest that the meltinclusions trapped a REE-, P- and silicate-enriched carbonate melt produced via carbonate-silicate liquidimmiscibility. During this process, both REE and P preferentially incorporated into the carbonate melt. Withsubsequent crystal fractionation of REE- and P-poor carbonate and silicate minerals, the separated carbonatitic meltbecomes P-REE-saturated, forming REE minerals and an immiscible REE-rich phosphate melt. The phosphate melt ishighly efficient at concentrating REE during the immiscibility process and plays a crucial role in controlling the REEbudget in the P-rich carbonatite magmas.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Ore Geology Reviews

ISSN

0169-1368

e-ISSN

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Volume of the periodical

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Issue of the periodical within the volume

117

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

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UT code for WoS article

000515206900048

EID of the result in the Scopus database

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