Publication detail

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.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

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

Released

18. 11. 2023

Publisher

SPRINGER

Location

NEW YORK

ISBN

1432-0967

Periodical

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY

Year of study

178

Number

12

State

Federal Republic of Germany

Pages from

1

Pages to

14

Pages count

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"
}