期刊
JOURNAL OF ASIAN EARTH SCIENCES
卷 64, 期 -, 页码 210-222出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jseaes.2012.12.019
关键词
Geochemistry; Sedimentary rocks; Provenance; Palaeo-flow; Fore-arc basin; Late Carboniferous; West Junggar
资金
- Major National Science and Technology Project [2011ZX05008-001]
The Late Carboniferous palaeo-tectonic setting of the West Junggar region is comprised of arcs alternating with basins. Geochemical analysis of the sedimentary rocks associated with these arc-related basins was conducted to better constrain the provenance and tectonic setting. Major and trace element geochemistry data of Late Carboniferous mudstones and sandstones in the Hala-alat Mountains suggest that these sedimentary rocks and their source areas are characterized by the following four features: (1) sediments experienced a simple recycling process; (2) a low degree weathering conditions in the source areas; (3) compositional immature of the sedimentary rocks; (4) dominated by intermediate to felsic provenance, with a few intermediate to mafic sediments. Integrated with the palaeo-flow data and previous authors' works, a fore-arc basin model is proposed for the tectonic setting of the sedimentary rocks. The Sawur arc is the primary provenance and supplies the major intermediate to felsic detrital fragments, The Bozchekul-Chingiz arc and Kexia oceanic island arc are the other two secondary sources. (C) 2012 Elsevier Ltd. All rights reserved.
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