Journal articles
New constraints on the pre-Permian continental crust growth of Central Asia (West Junggar, China) by U-Pb and Hf isotopic data from detrital zircon.
Abstract : In-situ U-Pb geochronology of detrital zircons from various Palaeozoic sedimentary rocks of West Junggar accretionary complexes (Central Asia) suggests two distinct episodes of arc magmatism, and an evolution in three steps: i) Ordovician-Silurian subduction generating juvenile arc crust; ii) Late Silurian subduction jamming, erosion and intraplate magmatism, iii) development of two new opposed Devonian-Carboniferous subductions recycling the Early Palaeozoic crust. Zircon Hf isotopes document three pre-Permian episodes of mantle-derived magmatic input into the crust: 1) Neoproterozoic (850-550 Ma), 2) Early Palaeozoic (530-450 Ma) and 3) Late Palaeozoic (380-320 Ma). Zircons also record the recycling of Neoproterozoic and Early Palaeozoic juvenile crusts during the Early and Late Palaeozoic. These data support a model of episodic continental crust growth in Central Asia.
Cited literature [7 references]
https://hal-insu.archives-ouvertes.fr/insu-00648790
Contributor : Nathalie Pothier <>
Submitted on : Friday, April 6, 2012 - 10:52:44 AM
Last modification on : Friday, September 11, 2020 - 9:10:03 AM
Long-term archiving on: : Saturday, July 7, 2012 - 2:21:31 AM
Contributor : Nathalie Pothier <>
Submitted on : Friday, April 6, 2012 - 10:52:44 AM
Last modification on : Friday, September 11, 2020 - 9:10:03 AM
Long-term archiving on: : Saturday, July 7, 2012 - 2:21:31 AM
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Choulet_et_al.pdf
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