Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F17%3A43910794" target="_blank" >RIV/62156489:43210/17:43910794 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/17:PU125631
Result on the web
<a href="http://dx.doi.org/10.1016/j.lithos.2016.12.037" target="_blank" >http://dx.doi.org/10.1016/j.lithos.2016.12.037</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.lithos.2016.12.037" target="_blank" >10.1016/j.lithos.2016.12.037</a>
Alternative languages
Result language
angličtina
Original language name
Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance
Original language description
In this work, the mode of occurrence, and major-and trace-element chemistry of apatite (sensu lato) from calcite and dolomite carbonatites, their associated cumulate rocks (including phoscorites) and hydrothermal parageneses were studied using a set of 80 samples from 50 localities worldwide. The majority of this set represents material for which no analytical data are available in the literature. Electron-microprobe and laser-ablation mass-spectrometry data (similar to 600 and 400 analyses, respectively), accompanied by back-scattered-electron and cathodoluminescence images and Raman spectra, were used to identify the key compositional characteristics and zoning, patterns of carbonatitic apatite. These data are placed in the context of phosphorus geochemistry in carbonatitic systems and carbonatite evolution, and compared to the models proposed by previous workers. The documented variations in apatite morphology and zoning represent a detailed record of a wide range of evolutionary processes, both magmatic and fluid-driven. The majority of igneous apatite from the examined rocks is Cl-poor fluorapatite or F-rich hydroxylapatite (>= 03 apfu F) with 0.2-2.7 wt.% Sro, 0-4.5 wt.% LREE203, 0-0.8 wt.% Na(2)0, and low levels of other cations accommodated in the Ca site (up to 1000 ppm Mn, 2300.ppm Fe, 200 ppm Ba, 150 ppm Pb, 700 ppm Th and 150 ppm U), none of which show meaningful correlation with the host-rock type. Silicate, (SO4)(2-)and (VO4)(3-)anions, substituting for (PO4)(3-), tend to occur in greater abundance in crystals from calcite carbonatites (up to 4.2 wt.% Sio(2), 1.5 wt.% Sio(2,) 1.5 wt.% SO3 and 660 ppm V). Based on the new evidence presented in this work, trace-element partitioning between apatite and carbonatitic magmas, phosphate solubility in these magmas, and compositional variation of apatite-group minerals from spatially associated carbonatitic rocks are critically re-evaluated.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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
Result continuities
Project
<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Lithos
ISSN
0024-4937
e-ISSN
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Volume of the periodical
274-275
Issue of the periodical within the volume
March
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
26
Pages from-to
188-213
UT code for WoS article
000397375400012
EID of the result in the Scopus database
2-s2.0-85010208929