Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow

Qiang Wang, Chris J. Hawkesworth, Derek Wyman, Sun-Lin Chung, Fu-Yuan Wu, Xian-Hua Li, Zheng-Xiang Li, Guo-Ning Gou, Xiu-Zheng Zhang, Gong-Jian Tang, Wei Dan, Lin Ma, Yan-Hui Dong

    Research output: Contribution to journalArticlepeer-review

    159 Citations (Scopus)
    3 Downloads (Pure)

    Abstract

    There is considerable controversy over the nature of geophysically recognized low-velocity-high-conductivity zones (LV-HCZs) within the Tibetan crust, and their role in models for the development of the Tibetan Plateau. Here we report petrological and geochemical data on magmas erupted 4.7-0.3 Myr ago in central and northern Tibet, demonstrating that they were generated by partial melting of crustal rocks at temperatures of 700-1,050 degrees C and pressures of 0.5-1.5 GPa. Thus Pliocene-Quaternary melting of crustal rocks occurred at depths of 15-50 km in areas where the LV-HCZs have been recognized. This provides new petrological evidence that the LV-HCZs are sources of partial melt. It is inferred that crustal melting played a key role in triggering crustal weakening and outward crustal flow in the expansion of the Tibetan Plateau.

    Original languageEnglish
    Article number11888
    Number of pages11
    JournalNature Communications
    Volume7
    DOIs
    Publication statusPublished - 16 Jun 2016

    Fingerprint

    Dive into the research topics of 'Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow'. Together they form a unique fingerprint.

    Cite this