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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10500 - Earth and related environmental sciences

Result continuities

  • Project

  • 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