Compositional variations of zirconolite from the Evate apatite deposit (Mozambique) as an indicator of magmatic-hydrothermal conditions during post-orogenic collapse of Gondwana
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00102153" target="_blank" >RIV/00216224:14310/18:00102153 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s00710-017-0538-7" target="_blank" >http://dx.doi.org/10.1007/s00710-017-0538-7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00710-017-0538-7" target="_blank" >10.1007/s00710-017-0538-7</a>
Alternative languages
Result language
angličtina
Original language name
Compositional variations of zirconolite from the Evate apatite deposit (Mozambique) as an indicator of magmatic-hydrothermal conditions during post-orogenic collapse of Gondwana
Original language description
Zirconolite is documented from the Evate apatite- magnetite-carbonate deposit in the circular Monapo Klippe (eastern Mozambique)—a relic of Neoproterozoic nappe thrusted over the Mesoproterozoic basement of the Nampula block. Zirconolite enriched in rare earth elements— REE = Y + Lu+La–Yb (up to 24.11 wt% REE2O3, 0.596 apfu REE) creates thin rims around spinel and magnetite grains, whereas zirconolite enriched in U and Th (up to 18.88 wt% ThO2 + UO2, 0.293 apfu Th + U) replace the Late Ediacaran (~ 590 Ma) zircon and baddeleyite along contacts with pyrrhotite and magnetite. Both types of zirconolite contain locally increased Nb and Ta concentrations (up to 7.58 wt% Nb2O5 + Ta2O5, 0.202 apfu Nb + Ta). Other types of zirconolite from Evate are dominated by the common CaZrTi2O7 end member, but the aforementioned “synthetic” REEZrTiFe3+O7 accompanied by another ‘synthetic’ (U,Th) ZrFe3 + 2O7 component are also abundant. The nonradiogenic Pb-corrected age of the early zirconolite corresponded to 485 ± 9 Ma, within uncertainty limit identical with the 493 ± 10 Ma age of the associated uranothorianite. The variegated chemical composition of zirconolites reflects the complex history of the Evate deposit. Compositional and substitution trends of the REE-zirconolite overlaps that genetically linked with carbonatites, syenites and mafic igneous rocks, whereas the U,Th-zirconolite is reminiscent of hydrothermal-metasomatic deposits. The predominance of trivalent iron in zirconolite most likely reflects strongly oxidizing parental fluids that percolated during episodic Late Ordovician to Late Cambrian rifting of Gondwana.
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
10500 - Earth and related environmental sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Mineralogy and Petrology
ISSN
0930-0708
e-ISSN
1438-1168
Volume of the periodical
112
Issue of the periodical within the volume
3
Country of publishing house
DE - GERMANY
Number of pages
18
Pages from-to
279-296
UT code for WoS article
000432986300001
EID of the result in the Scopus database
2-s2.0-85033371368