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Lithium isotopes in kimberlites, lamproites and lamprophyres as tracers of source components and processes related to supercontinent cycles

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F22%3A00000018" target="_blank" >RIV/00025798:_____/22:00000018 - isvavai.cz</a>

  • Alternative codes found

    RIV/67985831:_____/22:00552866 RIV/00216305:26110/22:PU143617

  • Result on the web

    <a href="https://sp.lyellcollection.org/content/513" target="_blank" >https://sp.lyellcollection.org/content/513</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1144/SP513-2021-60" target="_blank" >10.1144/SP513-2021-60</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Lithium isotopes in kimberlites, lamproites and lamprophyres as tracers of source components and processes related to supercontinent cycles

  • Original language description

    Our pilot study reveals potential fingerprints of Li isotopes recorded in the Mesoproterozoic (c. 1.4–1.1 Ga) kimberlites, lamproites and lamprophyres from the Eastern Dharwar Craton and Paleocene (62 Ma) orangeite from the Bastar Craton in India. The new data are interpreted in the context of available Li isotope composition of lamproitic to lamprophyric rocks occurring in Variscan (Bohemian Massif) and Alpine–Himalayan (SW Tibet) orogenic belts formed in response to Gondwana–Pangea amalgamation and break-up. As a result of supercontinents’ development, kimberlites from the Eastern Dharwar Craton and ‘orangeite’ from the Bastar Craton show clear presence of a component with a heavy Li isotope signature (delta7Li up to 9.7per mille) similar to an ancient altered oceanic crust, whereas the Eastern Dharwar Craton lamproites (2.3–6.3per mille) and lamprophyres (3.3–6.7per mille) show Li isotope signatures indicative of a dominant contribution from heterogeneous lithospheric mantle. Variscan lamprophyric to lamproitic rocks and post-collisional mantle-derived (ultra)potassic volcanic rocks from SW Tibet, i.e. rocks from the orogenic belts outside the cratonic areas, are characterized by a clear Li isotope shift towards an isotopically lighter component (delta7Li as low as –9.5per mille) comparable with the involvement of an evolved continental crust and high-pressure metamorphic rocks in their orogenic mantle source. Such components with isotopically light Li are strikingly missing in the source of cratonic kimberlites, lamproites and lamprophyres.

  • Czech name

  • Czech description

Classification

  • Type

    C - Chapter in a specialist book

  • CEP classification

  • OECD FORD branch

    10505 - Geology

Result continuities

  • Project

    <a href="/en/project/GX19-29124X" target="_blank" >GX19-29124X: EVOLUTION AND POST-EMPLACEMENT HISTORY OF CARBONATITES: IMPLICATIONS FOR THE MOBILITY AND CONCENTRATION OF CRITICAL METALS</a><br>

  • Continuities

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

Others

  • Publication year

    2022

  • Confidentiality

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

Data specific for result type

  • Book/collection name

    Lamprophyres, Lamproites and Related Rocks: Tracers to Supercontinent Cycles and Metallogenesis

  • ISBN

    978-1-78620-543-8

  • Number of pages of the result

    28

  • Pages from-to

    209-236

  • Number of pages of the book

    474

  • Publisher name

    The Geological Society Publishing House

  • Place of publication

    Bath

  • UT code for WoS chapter