An analysis of the lithofacies sections and establishment of the phase model for the Lower-Middle Devonian Kulumudi Formation in Barluk Mountain area of Xinjiang
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摘要:
新疆西准噶尔巴尔鲁克山一带下-中泥盆统库鲁木迪组曾被广泛认为是滨海-浅海沉积相。通过测制库鲁木迪组Ⅰ、Ⅱ岩相剖面，结合工作区内库鲁木迪组岩性、沉积构造、厚度、化石等特征，研究其沉积岩石学及相特征，划分沉积相单元、组合序列，分析其由冲积扇、扇三角洲及滨-浅海相组成，重点建立该区早-中泥盆世沉积模式，为后期区域地质矿产调查工作提供一定的基础地质资料。
Abstract:The Lower-Middle Devonian Kulumudi Formation of the Barluk Mountain area in west Junggar of Xinjiang has been widely considered to be product of the coastal neritic deposition environment. Through mapping Ⅰ, Ⅱ lithofacies section of Kulumudi Formation, and in combination with lithology, sedimentary structure, thickness, fossils and other characteristics of Kulumudi Foramtion in the study area, the authors studied characteristics of sedimentary rock and facies as well as sedimentary sequence, and detected through analysis that Kulumudi Formation is composed of alluvial fan, fan delta and coastal-shallow sea facies. On such a basis, the authors put forward a sedimentary model of the Early-Middle Devonian period, which can provide certain basic geological data for the late stage regional geological survey work.
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Keywords:
- fan delta /
- sedimentary facies /
- sedimentary model /
- Kulumudi Foramtion /
- west Junggar
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致谢: 成文过程中得到陕西区域地质矿产研究院陈榕高级工程师及中国地质大学（北京）王训练教授的指导，中国科学院地质与地球物理研究所李继亮研究员和西安地质调查中心陈隽璐研究员等同志在野外工作期间对本次研究提出宝贵建议，在此一并表示衷心感谢。
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图 1 库鲁木迪山—巴尔鲁克山一带地质简图
D2b—中泥盆统巴尔鲁克组；D1-2k—下—中泥盆统库鲁木迪组；S2-4M—上志留统玛依勒山群；O2-S1—中奥陶统—下志留统；γ—花岗岩；γδ—花岗闪长岩；δ—闪长岩
Figure 1. Sketch geological map of Kulumudi Mountain in Barrluk Mountain area
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图 3 Ⅰ号剖面第①层砾石定向性特征
Figure 3. Gravel directional characteristics of level one in sectionⅠ
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图 4 Ⅰ号剖面第⑨层中-大型楔状交错层理构造
Figure 4. The middle-large wedge cross bedding structure of level nine in sectionⅠ
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图 5 Ⅰ号大比例尺岩相剖面柱状图及沉积环境
Figure 5. No. 1 large proportion lithofacies section column and the inferred sedimentary environment
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图 6 Ⅱ号大比例尺岩相剖面图及沉积环境
Figure 6. No. 2 large proportion lithofacies section column and the inferred sedimentary environment
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图 7 研究区库鲁木迪组沉积环境柱状对比图
Figure 7. The columnar correlation chart of sedimentary environments for Kulumudi Formation in the study area
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图 8 研究区早—中泥盆世库鲁木迪山一带扇三角洲沉积环境模型
Figure 8. The fan delta sedimentary environment model for the Early-Middle Devonian Kulumudi Mountain in the study area
表 1 下—中泥盆统库鲁木迪组划分沿革
Table 1 The history of classification of the Lower-Middle Devonian Kulumudi Formation
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