Detail publikace

Zinc isotopes reveal disparate enriched sources of contemporary lamprophyres in Eastern Dharwar Craton

LIU, J. CHEN, L. WANG, X. KRMÍČEK, L. ZENG, G. ZHANG, X. MURPHY, D. DALTON, H. PANDEY, A. CHALAPATHI RAO, N.

Originální název

Zinc isotopes reveal disparate enriched sources of contemporary lamprophyres in Eastern Dharwar Craton

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Lamprophyres are mantle-derived rocks characterized by enrichment of incompatible elements and volatiles; however, the origin of their enriched sources remains enigmatic. Here we present zinc isotopic data for contemporary Mesoproterozoic (similar to 1.1 Ga) lamprophyres from three localities of the Eastern Dharwar Craton. The Mudigubba and Kadiri lamprophyres with island-arc basalt (IAB)-like trace element features, such as positive Pb and negative Nb-Ta, Zr-Hf and Ti anomalies, have mid-ocean ridge basalt (MORB)-like delta Zn-66 values ranging from + 0.22 parts per thousand to + 0.29 parts per thousand. In contrast, the Udiripikonda lamprophyre shows higher-than-MORB delta Zn-66 values of + 0.39 parts per thousand to + 0.48 parts per thousand and elemental features of intra-plate magmas with a lack of pronounced Nb-Ta-negative anomalies. Based on the covariations between Zn isotopes and trace element ratios, we infer that the Mudigubba and Kadiri lamprophyres with MORB-like Zn isotopes and high Ba/La, K/Nb and low Nb/La, Ce/Pb ratios are inherited from sub-continental lithospheric mantle metasomatized by fluids derived from a subducted slab. On the contrary, the higher-than-MORB Zn isotopic compositions, with low Ba/La, K/Nb and high Nb/La, Ce/Pb, K/U and Ba/Th ratios for the Udiripikonda lamprophyre are inferred to derive from lithospheric mantle enriched by carbonatitic melts or subducted carbonate-bearing sediments within the mantle transition zone. Hence, our study suggests that contemporary lamprophyres can be derived from disparate enriched mantle sources.

Klíčová slova

Zinc isotopes; Recycled carbonates; Enriched source; Lamprophyres; Eastern Dharwar Craton

Autoři

LIU, J.; CHEN, L.; WANG, X.; KRMÍČEK, L.; ZENG, G.; ZHANG, X.; MURPHY, D.; DALTON, H.; PANDEY, A.; CHALAPATHI RAO, N.

Vydáno

18. 11. 2023

Nakladatel

SPRINGER

Místo

NEW YORK

ISSN

1432-0967

Periodikum

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY

Ročník

178

Číslo

12

Stát

Spolková republika Německo

Strany od

1

Strany do

14

Strany počet

14

URL

https://doi.org/10.1007/s00410-023-02073-1

BibTex

@article{BUT187382,
  author="Jian-Qiang {Liu} and Li-Hui {Chen} and Xiao-Jun {Wang} and Lukáš {Krmíček} and Gang {Zeng} and Xiao-Yu {Zhang} and David T. {Murphy} and Hayden {Dalton} and Ashutosh {Pandey} and Nittala Venkata {Chalapathi Rao}",
  title="Zinc isotopes reveal disparate enriched sources of contemporary lamprophyres in Eastern Dharwar Craton",
  journal="CONTRIBUTIONS TO MINERALOGY AND PETROLOGY",
  year="2023",
  volume="178",
  number="12",
  pages="1--14",
  doi="10.1007/s00410-023-02073-1",
  issn="1432-0967",
  url="https://doi.org/10.1007/s00410-023-02073-1"
}