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ZHANG Li-min, LI Yong-jun, XIANG Kun-peng, et al. Geochemical Characteristics and Genesis of Cherts from Mayile Ophiolitic Mélange in West Junggar, Northern Xinjiang[J]. Northwestern Geology, 2014, 47(1): 61-70.
Citation: ZHANG Li-min, LI Yong-jun, XIANG Kun-peng, et al. Geochemical Characteristics and Genesis of Cherts from Mayile Ophiolitic Mélange in West Junggar, Northern Xinjiang[J]. Northwestern Geology, 2014, 47(1): 61-70.
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Geochemical Characteristics and Genesis of Cherts from Mayile Ophiolitic Mélange in West Junggar, Northern Xinjiang

  • 1. Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, College of Earth Science & Resources, Chang'an University, Xi'an 710054, China;

  • 2. No.7 Geological Party, BGMERD of XinJiang, Wusu 833000, China

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  • Received Date: January 03, 2014
  • Revised Date: February 25, 2014
  • Available Online: July 28, 2022
  • Published Date: March 04, 2014
    Graphical Abstract
    • Abstract
  • Mayile cherts of early Paleozoic generally occurred in ophiolitic mélange. Their provenance and sedimentary environment are discussed based on the petrography and geochemistry of the silicolites in the cross section of the Mayile ophiolites. The cherts are mainly purple and composed of microcrystalline authigenic quartz and implicit eutectics. According to geochemical characteristics, the samples are all influenced by the acidic volcano tuff and are probably the product of both the biochemical and volcanic process. Cherts of this type generally have higher SiO2, Al2O3 content, lower Fe2O3 content, and intermediate TiO2 content. Integrating the geological occurrence, petrography and the geochemical characteristics of those cherts, it is believed that the cherts are formed in a tectonic setting above the subduction zone rather than an open oceanic environment.
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