Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Evolution of the Chilka Lake granulite complex, northern Eastern Ghats Belt, India: First evidence of ~ 780 Ma decompression of the deep crust and its implication on the India–Antarctica correlation

    Access Status
    Fulltext not available
    Authors
    Bose, S.
    Das, K.
    Torimoto, J.
    Arima, M.
    Dunkley, Daniel
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bose, S. and Das, K. and Torimoto, J. and Arima, M. and Dunkley, D. 2016. Evolution of the Chilka Lake granulite complex, northern Eastern Ghats Belt, India: First evidence of ~ 780 Ma decompression of the deep crust and its implication on the India–Antarctica correlation. Lithos. 263: pp. 161-189.
    Source Title
    Lithos
    DOI
    10.1016/j.lithos.2016.01.017
    ISSN
    0024-4937
    Faculty
    Faculty of Science and Engineering
    URI
    http://hdl.handle.net/20.500.11937/50849
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Elsevier B.V.High-grade para- and orthogneissic rocks near the Chilka Lake granulite complex, northern part of the Eastern Ghats Belt show complex structural and petrological history. Based on field and petrographic characters, five (M1–M5) metamorphic events could be identified. The earliest metamorphic event (M1) produced amphibolite grade mineral assemblage which produced the peak granulite (M2) assemblages at 900–950 °C, 8.5–9.0 kbar. The third metamorphic event caused decompression of the deeper crust up to 700–800 °C, 6.0–6.5 kbar. This was followed by cooling (M4) and subsequent thermal overprinting (M5). Fluid-composition during M3 was dominated by high-density CO2 and changed to low-density mixed CO2–H2O during the M3. Zircon U–Pb SHRIMP data suggest 781 ± 9 Ma age for M3 event. Texturally constrained monazite U–Th–Pb EPMA data, on the other hand, yield a group age of 988 ± 23 Ma from grain interior, which can signifies the age of M2 event. Few spots with younger dates in the range of 550–500 Ma are also noted. This interpretation changes the existing tectonothermal history of northern Eastern Ghats Belt. Our data show that the two adjacent crustal domains of the Eastern Ghats Belt show distinctly contrasting Neoproterozoic histories. While the central Domain 2 evolved through early anticlockwise P–T path culminating in ultrahigh temperature, the northern Domain 3 evolved through a clockwise P–T path. It appears that the Domain 3 was contiguous to East Antarctica and became part of the Eastern Ghats Belt during the assembly of Gondwana. The ca. 780 Ma decompression event in the northern Eastern Ghats Belt opens up new possibilities for interpreting the breakup of Rodinia.

    Related items

    Showing items related by title, author, creator and subject.

    • India-Antarctica-Australia-Laurentia connection in the Paleoproterozoic-Mesoproterozoic revisited: Evidence from new zircon U-Pb and monazite chemical age data from the Eastern Ghats Belt, India
      Bose, S.; Dunkley, Daniel; Dasgupta, S.; Das, K.; Arima, M. (2011)
      We present zircon and monazite U-Pb data from ultrahigh-temperature (UHT) metamorphosed orthogneisses and paragneisses collected from key areas of the Eastern Ghats Belt, India. The results show contrasting tectonothermal ...
    • Growth of the Greater Indian Landmass and its assembly in Rodinia: Geochronological evidence from the Central Indian Tectonic Zone
      Bhowmik, S.; Wilde, Simon; Bhandari, A.; Pal, T.; Pant, N. (2012)
      The Sausar Mobile Belt at the southern margin of the Central Indian Tectonic Zone (CITZ) is a key unit in constraining the timing of continent–continent collision between the North and South Indian cratonic blocks. It ...
    • How long-lived is ultrahigh temperature (UHT) metamorphism?: Constraints from zircon and monazite geochronology in the Eastern Ghats orogenic belt, India
      Korhonen, Fawna; Clark, Christopher; Brown, M.; Bhattacharya, S.; Taylor, Richard (2013)
      Along the coast of Peninsular India, the Eastern Ghats expose a deep crustal section through a composite Proterozoic orogenic belt. To quantify the late Mesoproterozoic–early Neoproterozoic pressure (P)–temperature (T)–time ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.