Cenozoic volcanism of southeast Asia

  • Fedorov P
  • Koloskov A
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This paper presents an analysis of published and our own data on the geochemistry and isotopic sys- tematics of the Cenozoic volcanic complexes of southeastern China, Vietnam, and Thailand and the adjoining East China and South China seas. Three large periods of volcanic activity were distinguished: Early Tertiary, Miocene, and Pliocene–Quaternary. The first period was characterized by the development of potassic basalt (absarokites and cocites in Vietnam) and tholeiitic bimodal (basalts and trachytes in southeastern China) volca- nism, and the subsequent periods were dominated by intraplate-type tholeiitic and alkaline volcanism and minor occurrence of bimodal tholeiitic magmatism (basalts and rhyolites of the Okinawa Trough). The Ceno- zoic magmatic and geodynamic events were correlated over the region. It was shown that lateral and temporal variations in the compositions of the Miocene and Pliocene–Quaternary rocks reflect strong isotopic and geochemical heterogeneity of deep-seated magma sources.

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  • PUI: 41273183
  • SGR: 24644461008
  • SCOPUS: 2-s2.0-24644461008
  • ISSN: 08695911


  • Pi Fedorov

  • Av Koloskov

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