The Carbonate Microfacies and Paleoenvironment of the Upper Carboniferous Biegentawu Formation in Kake Area, Xinjiang
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摘要: 通过对新疆卡克地区上石炭统别根他乌组105个岩石薄片进行显微镜下观察,识别出6种微相:MF1灰泥灰岩微相、MF2含生物碎屑灰泥灰岩、MF3生物碎屑粒泥灰岩、MF4含生物碎屑亮晶似球粒灰岩、MF5生物碎屑亮晶灰岩和MF6生物碎屑砾屑灰岩。根据微相组合类型,推断该地区在罗苏期至达拉期经历了台地-台地边缘浅滩及礁-台地边缘斜坡3种环境,整体为一个完整海侵-海退的过程。Abstract: The observation under microscope of 105 petrographic thin sections from the Upper Carboniferous Biegentawu Formation in Kake area, Xinjiang identified 6 microfacies: MF1 lime marl, MF2 bioclastic lime marl, MF3 bioclastic wackstone, MF4 bioclastic pelletoid limestone, MF5 sparry bioclastic limestone and MF6 bioclastic rudstone. According to the types of microfacies assemblage, we deduce that this area experienced three sedimentary environments of open platform-platform margin-platform margin slope which is a complete transgression-regression progress.
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Key words:
- carbonate microfacies /
- sedimentary environment /
- Biegentawu formation /
- Upper Carboniferous /
- Xinjiang
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