Tectonic evolution of the ultrahigh‐pressure (UHP) and high‐pressure (HP) metamorphic belts from central China

Shigenori Maruyama, J. G. Liou, Ruyuan Zhang

    Research output: Contribution to journalArticle

    177 Citations (Scopus)

    Abstract

    Abstract In the Triassic suture between the Sino‐Korean and Yangtze cratons, the Dabie metamorphic Complex in central China includes three tectonic units: the northern Dabie migmatitic terrane, the central ultrahigh‐P coesite‐ and diamond‐bearing eclogite belt, and the southern high‐P blueschist‐eclogite belt. This complex is bounded to the north by a north‐dipping normal fault with a Paleozoic accretionary complex and to the south by a north‐dipping reverse fault with Yangtze basement plus its foreland fold‐and‐thrust sequence. Great differences in metamorphic pressure suggests that these units reached different depths during metamorphism and their juxtaposition occurred by wedge extrusion of subducted old continental fragments. These units were subsequently subjected to (i) Barrovian type regional metamorphism and deformation at shallow depths; (ii) intrusion of Cretaceous granitic plutons; and (iii) doming and segmentation into several blocks by normal and strike‐slip faults. A new speculative model of tectonic exhumation of UHP rocks is proposed.

    Original languageEnglish
    Pages (from-to)112-121
    Number of pages10
    JournalIsland Arc
    Volume3
    Issue number2
    DOIs
    Publication statusPublished - Jun 1994

    Keywords

    • Dabie Mountains
    • tectonics
    • ultrahigh‐P metamorphism
    • wedge extrusion

    ASJC Scopus subject areas

    • Geology

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