Zircon and Titanite U-Pb SHRIMP dating of unexposed basement units of the Buenos Aires region, southeastern Río de la Plata Craton, Argentina

C.J. Chernicoff, E.O. Zappettini, Joao Santos, A. Pesce, Neal Mcnaughton

    Research output: Contribution to journalArticle

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    Abstract

    © 2015 Taylor & Francis. We present U-Pb Sensitive High Mass Resolution Ion MicroProbe (SHRIMP) data of unexposed igneous-metamorphic basement rocks from two areas of the southeastern Río de la Plata craton (RPC; Buenos Aires city) located within the Buenos Aires-Piedra Alta (BAPA) terrane - and the Tapalqué area (Buenos Aires province) - located within the Tandilia terrane, and discuss the tectonic evolution of that portion of the craton based on both the new data and previous work. The newly obtained geochronological data of drill cores indicate that: (a) arc magmatism occurred at 2164-2186 Ma corresponding to early Trans-Amazon (early Rhyacian) arc magmatism; (b) the age of collision between the BAPA and Tandilia terranes is inferred to have commenced at ca. 2110 Ma; (c) peak metamorphism occurred at ca. 2069 Ma; and (d) the presence of rocks related to the RPC is confirmed under Cenozoic sediments in a large area between Martin Garcia Island and Tandil. We envisage an early Rhyacian divergent double subduction scheme between the BAPA and Tandilia terranes - i.e. N-dipping towards BAPA and S-dipping towards Tandilia - prior to the late Rhyacian collision between these two terranes.
    Original languageEnglish
    Pages (from-to)643-652
    JournalInternational Geology Review
    Volume58
    Issue number5
    DOIs
    Publication statusPublished - 2016

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    SHRIMP dating
    titanite
    craton
    terrane
    zircon
    magmatism
    collision
    ion microprobe
    basement rock
    tectonic evolution
    metamorphic rock
    metamorphism
    subduction
    rock
    sediment

    Cite this

    @article{e95901f3fd3c41619d8b1f35e8ae2095,
    title = "Zircon and Titanite U-Pb SHRIMP dating of unexposed basement units of the Buenos Aires region, southeastern R{\'i}o de la Plata Craton, Argentina",
    abstract = "{\circledC} 2015 Taylor & Francis. We present U-Pb Sensitive High Mass Resolution Ion MicroProbe (SHRIMP) data of unexposed igneous-metamorphic basement rocks from two areas of the southeastern R{\'i}o de la Plata craton (RPC; Buenos Aires city) located within the Buenos Aires-Piedra Alta (BAPA) terrane - and the Tapalqu{\'e} area (Buenos Aires province) - located within the Tandilia terrane, and discuss the tectonic evolution of that portion of the craton based on both the new data and previous work. The newly obtained geochronological data of drill cores indicate that: (a) arc magmatism occurred at 2164-2186 Ma corresponding to early Trans-Amazon (early Rhyacian) arc magmatism; (b) the age of collision between the BAPA and Tandilia terranes is inferred to have commenced at ca. 2110 Ma; (c) peak metamorphism occurred at ca. 2069 Ma; and (d) the presence of rocks related to the RPC is confirmed under Cenozoic sediments in a large area between Martin Garcia Island and Tandil. We envisage an early Rhyacian divergent double subduction scheme between the BAPA and Tandilia terranes - i.e. N-dipping towards BAPA and S-dipping towards Tandilia - prior to the late Rhyacian collision between these two terranes.",
    author = "C.J. Chernicoff and E.O. Zappettini and Joao Santos and A. Pesce and Neal Mcnaughton",
    year = "2016",
    doi = "10.1080/00206814.2015.1110503",
    language = "English",
    volume = "58",
    pages = "643--652",
    journal = "International Geology Review",
    issn = "0020-6814",
    publisher = "Taylor & Francis",
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    }

    Zircon and Titanite U-Pb SHRIMP dating of unexposed basement units of the Buenos Aires region, southeastern Río de la Plata Craton, Argentina. / Chernicoff, C.J.; Zappettini, E.O.; Santos, Joao; Pesce, A.; Mcnaughton, Neal.

    In: International Geology Review, Vol. 58, No. 5, 2016, p. 643-652.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Zircon and Titanite U-Pb SHRIMP dating of unexposed basement units of the Buenos Aires region, southeastern Río de la Plata Craton, Argentina

    AU - Chernicoff, C.J.

    AU - Zappettini, E.O.

    AU - Santos, Joao

    AU - Pesce, A.

    AU - Mcnaughton, Neal

    PY - 2016

    Y1 - 2016

    N2 - © 2015 Taylor & Francis. We present U-Pb Sensitive High Mass Resolution Ion MicroProbe (SHRIMP) data of unexposed igneous-metamorphic basement rocks from two areas of the southeastern Río de la Plata craton (RPC; Buenos Aires city) located within the Buenos Aires-Piedra Alta (BAPA) terrane - and the Tapalqué area (Buenos Aires province) - located within the Tandilia terrane, and discuss the tectonic evolution of that portion of the craton based on both the new data and previous work. The newly obtained geochronological data of drill cores indicate that: (a) arc magmatism occurred at 2164-2186 Ma corresponding to early Trans-Amazon (early Rhyacian) arc magmatism; (b) the age of collision between the BAPA and Tandilia terranes is inferred to have commenced at ca. 2110 Ma; (c) peak metamorphism occurred at ca. 2069 Ma; and (d) the presence of rocks related to the RPC is confirmed under Cenozoic sediments in a large area between Martin Garcia Island and Tandil. We envisage an early Rhyacian divergent double subduction scheme between the BAPA and Tandilia terranes - i.e. N-dipping towards BAPA and S-dipping towards Tandilia - prior to the late Rhyacian collision between these two terranes.

    AB - © 2015 Taylor & Francis. We present U-Pb Sensitive High Mass Resolution Ion MicroProbe (SHRIMP) data of unexposed igneous-metamorphic basement rocks from two areas of the southeastern Río de la Plata craton (RPC; Buenos Aires city) located within the Buenos Aires-Piedra Alta (BAPA) terrane - and the Tapalqué area (Buenos Aires province) - located within the Tandilia terrane, and discuss the tectonic evolution of that portion of the craton based on both the new data and previous work. The newly obtained geochronological data of drill cores indicate that: (a) arc magmatism occurred at 2164-2186 Ma corresponding to early Trans-Amazon (early Rhyacian) arc magmatism; (b) the age of collision between the BAPA and Tandilia terranes is inferred to have commenced at ca. 2110 Ma; (c) peak metamorphism occurred at ca. 2069 Ma; and (d) the presence of rocks related to the RPC is confirmed under Cenozoic sediments in a large area between Martin Garcia Island and Tandil. We envisage an early Rhyacian divergent double subduction scheme between the BAPA and Tandilia terranes - i.e. N-dipping towards BAPA and S-dipping towards Tandilia - prior to the late Rhyacian collision between these two terranes.

    U2 - 10.1080/00206814.2015.1110503

    DO - 10.1080/00206814.2015.1110503

    M3 - Article

    VL - 58

    SP - 643

    EP - 652

    JO - International Geology Review

    JF - International Geology Review

    SN - 0020-6814

    IS - 5

    ER -