| 塔里木盆地肖尔布拉克剖面肖尔布拉克组下段微生物碳酸盐岩沉积特征 |
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| 引用本文： | 宋亚芳,陈代钊,郭川,周锡强.塔里木盆地肖尔布拉克剖面肖尔布拉克组下段微生物碳酸盐岩沉积特征[J].沉积学报,2020,38(1):55-63. |
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| 作者姓名： | 宋亚芳 陈代钊 郭川 周锡强 |
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| 作者单位： | 1.中国科学院地质与地球物理研究所油气资源研究重点实验室, 北京 100029 |
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| 基金项目： | 国家自然科学基金项目U1663209国家自然科学基金项目2017YFC0603103 |
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| 摘 要： | 塔里木盆地阿克苏地区肖尔布拉克剖面肖尔布拉克组下段除底部条带状泥晶白云岩外,主要为微生物碳酸盐岩沉积,但目前关于这套微生物岩的研究很少。通过详细的野外露头观察及室内镜下薄片鉴定,对研究剖面肖尔布拉克组下段的微生物碳酸盐岩类型进行了识别、分类,并重构了其沉积环境。结果显示:肖尔布拉克组下段共发育六种岩相类型,其中包括四种微生物碳酸盐岩类型:粗纹层状凝块岩,具窗孔凝块岩,厚层状凝块岩和块状凝块岩。粗纹层状凝块岩和具窗孔凝块岩主要分布于潮间带;厚层状凝块岩和块状凝块岩主要沉积于中深—浅水局限潮下带。不同的微生物岩类型发育于不同的位置,主要受控于海平面变化、古地理位置及微生物群落等因素。
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| 关 键 词： | 塔里木盆地 肖尔布拉克组 微生物碳酸盐岩 沉积相 |
| 收稿时间： | 2018-12-17 |
Depositional Characteristics of Microbial Carbonates from the Lower Xiaoerbulak Formation in the Xiaoerbulake Section,Tarim Basin |
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| SONG YaFang,CHEN DaiZhao,GUO Chuan,ZHOU XiQiang.Depositional Characteristics of Microbial Carbonates from the Lower Xiaoerbulak Formation in the Xiaoerbulake Section,Tarim Basin[J].Acta Sedimentologica Sinica,2020,38(1):55-63. |
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| Authors: | SONG YaFang CHEN DaiZhao GUO Chuan ZHOU XiQiang |
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| Institution: | 1.Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Science, Beijing 100029, China2.University of Chinese Academy of Sciences, Beijing 100049, China3.Resource and Environmental Engineering College, Guizhou University, Guiyang 550025, China |
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| Abstract: | Except for a few dozen meters of ribbon mudstone in the lower part, the Xiaoerbulake section of the Tarim Basin, NW China, most of the Lower Xiaoerbulake Formation deposits contain microbial carbonates; however, few researchers have paid attention on this. Detailed observations of field outcrops and thin sections in this study has identified and classified these microbial carbonates, and restored the local depositional paleoenvironment. Six lithofacies are found in the Lower Xiaoerbulake Formation deposit, including coarse-laminated and fenestral thrombolites in the intertidal zone, and thick-bedded and massive thrombolites restricted to the intermediate-to-shallow subtidal region. Various types of microbial carbonates are present in different locations, depending on ancient sea-level fluctuations, topography and microbial communities. |
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| Keywords: | Tarim Basin Xiaoerbulake Formation microbial carbonate sedimentary facies |
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