Title: Ages and tectonic implication of Late Paleozoic plutons in the West Junggar,North Xinjiang: Evidence from LA-ICPMS zircon geochronology
Abstract: Voluminous Late Paleozoic plutons distributed throughout the West Junggar region provide critical information for the Phanerozoic crustal growth. On the basis of new zircon U-Pb dating on seven plutons in the Northern West Junggar region, in association with the previous zircon U-Pb ages, the plutons can be divided into two groups: Early Carboniferous(ca. 346 to 321 Ma), Late Carboniferous-Early Permian(ca. 316 to 281 Ma). The Early Carboniferous plutons mainly consist of I-type granites and only occur in Zharma-Saur volcanic arc, and may be related to the southward subduction of the Irtysh-Zaysan Ocean. Late Carboniferous-Early Permian plutons are widely distributed in the northern and southern parts of the West Junggar region. The plutons composed of A-type granites, Charnockites, adakites, magnesian diorites, which indicate a high-temperature and extensional setting. All these suggest that ridge subduction and slab window formation are likely an important mechanism for the generation of the Late Carboniferous-Early Permian plutons in the West Junggar region.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 10
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