峡东地区早奥陶世C同位素异常及其成因

张保民, 陈孝红, 周鹏, 李志宏, 彭中勤, 曾雄伟. 峡东地区早奥陶世C同位素异常及其成因[J]. 地质通报, 2017, 36(5): 792-799.
引用本文: 张保民, 陈孝红, 周鹏, 李志宏, 彭中勤, 曾雄伟. 峡东地区早奥陶世C同位素异常及其成因[J]. 地质通报, 2017, 36(5): 792-799.
ZHANG Baomin, CHEN Xiaohong, ZHOU Peng, LI Zhihong, PENG Zhongqin, ZENG Xiongwei. Lower Ordovician carbon isotope excursion in the eastern Yangtze Gorges area and its genetic analysis[J]. Geological Bulletin of China, 2017, 36(5): 792-799.
Citation: ZHANG Baomin, CHEN Xiaohong, ZHOU Peng, LI Zhihong, PENG Zhongqin, ZENG Xiongwei. Lower Ordovician carbon isotope excursion in the eastern Yangtze Gorges area and its genetic analysis[J]. Geological Bulletin of China, 2017, 36(5): 792-799.

峡东地区早奥陶世C同位素异常及其成因

  • 基金项目:
    中国地质调查局项目《华南中部震旦纪-志留纪地层格架、岩相古地理与成矿关系》(编号:1212011121103)和《湖北1: 5万分乡、莲沱、三斗坪、宜昌市幅区域地质调查》(编号:1212010710715)
详细信息
    作者简介: 张保民(1983-), 男, 硕士, 高级工程师, 从事区域地质调查工作。E-mail:zhangbaomin1983@qq.com
    通讯作者: 周鹏(1982-), 男, 硕士, 助理工程师, 从事区域地质调查工作。E-mail:zhoupeng_01@126.com
  • 中图分类号: P534.42;P597+.2

Lower Ordovician carbon isotope excursion in the eastern Yangtze Gorges area and its genetic analysis

More Information
  • 以宜昌黄花场奥陶系剖面为研究对象,开展峡东地区早奥陶世C同位素研究,建立了峡东地区早奥陶世C同位素曲线,并识别出可全球对比的2次正漂移(C1,C3)和2次负漂移(C2,C4)。通过分析峡东地区沉积相序列及海平面变化特征,发现峡东地区C同位素变化曲线与海平面波动曲线一致,表明峡东地区C同位素的变化主要受控于海平面的波动。

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  • 图 1  峡东地区地质略图与剖面位置

    Figure 1. 

    图 2  峡东地区早奥陶世C-O稳定同位素分布特征

    Figure 2. 

    图 3  峡东地区早奥陶世δ13C变化及其对海平面变化的响应

    Figure 3. 

    图 4  峡东地区、北美地区、南美地区C同位素曲线对比

    Figure 4. 

    表 1  峡东地区早奥陶世C-O同位素测试结果

    Table 1.  δ13C and δ18O data of samples from the Lower Ordovician strata in the east of Yangtze Gorges area

    样品号层位δ13C/‰δ18O/‰
    YYHH-77T红花园组-0.28-7.14
    YYHH-76T红花园组-0.52-6.71
    YYHH-75T红花园组-0.89-7.97
    YYHH-74T红花园组-1.62-7.8
    YYHH-73T红花园组-1.16-7.97
    YYHH-72T红花园组-1.28-7.93
    YYHH-71T红花园组-1.51-7.56
    YYHH-70T红花园组-1.29-7.8
    YYHH-69T分乡组-1.2-7.86
    YYHH-68T分乡组-1.29-8.02
    YYHH-67T分乡组-1.79-7.74
    YYHH-66T分乡组-1.5-8.06
    YYHH-65T分乡组-1.33-8.14
    YYHH-64T分乡组-1.85-8.46
    YYHH-63T分乡组-1.83-7.55
    YYHH-62T分乡组-2.4-7.96
    YYHH-61T分乡组-1.66-8.18
    YYHH-60T分乡组-2.37-7.67
    YYHH-59T分乡组-2.5-7.6
    YYHH-58T分乡组-2.39-7.34
    YYHH-57T分乡组-2.29-7.07
    YYHH-56T分乡组-2.62-7.26
    YYHH-55T分乡组-3.3-7.64
    YYHH-54T分乡组-3.24-8.01
    YYHH-53T分乡组-2.49-7.52
    YYHH-52T分乡组-2.64-7.45
    YYHH-51T分乡组-3.11-7.82
    YYHH-50T分乡组-2.8-7.24
    YYHH-49T分乡组-2.76-7.8
    YYHH-48T分乡组-1.6-7.28
    YYHH-47T分乡组-0.65-7.45
    YYHH-46T分乡组-0.26-7.56
    YYHH-45T分乡组-0.56-7.39
    YYHH-44T分乡组-0.86-7.37
    YYHH-43T分乡组-1.26-7.64
    YYHH-42T分乡组-0.38-5.44
    YYHH-41T分乡组-0.42-5.45
    YYHH-40T分乡组-1.66-7.52
    YYHH-39T分乡组-2.29-7.69
    YYHH-38T南津关组-5.33-7.78
    YYHH-37T南津关组-2.67-7.57
    YYHH-36T南津关组-2.53-7.45
    YYHH-35T南津关组-2.37-8.1
    YYHH-34T南津关组-1.9-8.23
    YYHH-33T南津关组-1.76-7.95
    YYHH-32T南津关组-1.68-7.83
    YYHH-31T南津关组-1.72-7.84
    YYHH-30T南津关组-2.94-8.12
    YYHH-29T南津关组-1.99-5.77
    YYHH-28T南津关组-1.17-6.74
    YYHH-27T南津关组-0.99-6.16
    YYHH-26T南津关组-0.99-7.08
    YYHH-25T南津关组-0.87-5.97
    YYHH-24T南津关组-1.03-6.05
    YYHH-23T南津关组-1.06-7.75
    YYHH-22T南津关组-0.8-7.64
    YYHH-21T南津关组-0.8-7.61
    YYHH-20T南津关组0.13-7.21
    YYHH-19T南津关组-0.2-8.01
    YYHH-18T南津关组-0.92-7.54
    YYHH-17T南津关组-0.69-5.63
    YYHH-16T西陵峡组-0.51-7.33
    YYHH-15T西陵峡组-0.2-5.98
    YYHH-14T西陵峡组-0.82-5.66
    YYHH-13T西陵峡组-0.83-5.67
    YYHH-12T西陵峡组-0.76-6.01
    YYHH-11T雾渡河组-1-5.81
    YYHH-10T雾渡河组-0.87-6.1
    YYHH-9T雾渡河组-1.06-6.55
    YYHH-8T雾渡河组-1.3-7.04
    YYHH-7T雾渡河组-0.87-7.05
    YYHH-6T雾渡河组-1.16-7.78
    YYHH-5T雾渡河组-0.59-6.85
    YYHH-4T雾渡河组-1.04-7.08
    YYHH-3T雾渡河组-0.83-5.93
    YYHH-2T雾渡河组-1.16-7.39
    YYHH-1T雾渡河组-0.87-7.8
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出版历程
收稿日期:  2016-08-12
修回日期:  2016-12-01
刊出日期:  2017-05-25

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