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南海台西南盆地南部海域19 ka以来沉积物物源与输运机制分析

唐荣 冯秀丽 冯利 肖晓 刘爽

唐荣,冯秀丽,冯利,等. 南海台西南盆地南部海域19 ka以来沉积物物源与输运机制分析[J]. 海洋学报,2021,43(8):54–65 doi: 10.12284/hyxb2021090
引用本文: 唐荣,冯秀丽,冯利,等. 南海台西南盆地南部海域19 ka以来沉积物物源与输运机制分析[J]. 海洋学报,2021,43(8):54–65 doi: 10.12284/hyxb2021090
Tang Rong,Feng Xiuli,Feng Li, et al. Analysis on the provenance and transport mechanism of sediments in the southern area of Southwest Taiwan Basin, South China Sea over the last 19 ka[J]. Haiyang Xuebao,2021, 43(8):54–65 doi: 10.12284/hyxb2021090
Citation: Tang Rong,Feng Xiuli,Feng Li, et al. Analysis on the provenance and transport mechanism of sediments in the southern area of Southwest Taiwan Basin, South China Sea over the last 19 ka[J]. Haiyang Xuebao,2021, 43(8):54–65 doi: 10.12284/hyxb2021090

南海台西南盆地南部海域19 ka以来沉积物物源与输运机制分析

doi: 10.12284/hyxb2021090
基金项目: 国家重点研发计划(2017YFC0306703);中国地震局第一监测中心科技创新主任基金(FMC2020003)。
详细信息
    作者简介:

    唐荣(1993—),女,安徽省马鞍山市人,助理工程师,从事第四纪沉积与环境变迁研究。E-mail:candy.sp@foxmail.com

    通讯作者:

    冯秀丽(1962—),女,博士,教授,主要从事海洋沉积与工程环境研究。E-mail:fengxiuli@ouc.edu.cn

  • 中图分类号: P736.21+2

Analysis on the provenance and transport mechanism of sediments in the southern area of Southwest Taiwan Basin, South China Sea over the last 19 ka

  • 摘要: 通过对南海台西南盆地南部海域TS6岩芯沉积物样品稀土元素地球化学特征和黏土矿物组合进行分析,探讨了研究区近19 ka (末次冰消期)以来沉积物物质来源、输运机制及物源变化特征。物源综合分析结果显示,台湾河流是研究区沉积物的主要源区,其中台湾西部河流较东部河流贡献更大,珠江也为研究区输送了部分沉积物。由于各源区物质主要黏土矿物种类及含量存在较大差异,推测研究区沉积物黏土矿物中的伊利石和绿泥石主要由台湾河流提供,高岭石主要由珠江提供,含量较少的蒙脱石由东南部的吕宋岛提供。末次冰消期以来,研究区陆源物质输入量受控于海平面变化而逐渐减少,黏土矿物组合反映的物源变化主要受控于气候和洋流变化,还可能叠加了多种因素的影响。
  • 图  1  TS6孔站位示意图

    Fig.  1  Map showing the location of Core TS6

    图  2  TS6岩芯REE参数垂向变化

    Fig.  2  Vertical change of REE parameters of Core TS6

    图  3  黏土矿物含量及相关参数垂向变化

    Fig.  3  Vertical change of clay mineral content and related parameters

    图  4  TS6岩芯沉积物与潜在物源区REE上地壳标准化分布

    台湾河流数据引自文献[29],吕宋岛北部数据引自文献[30],珠江数据引自文献[31],红河和湄公河数据引自文献[32],长江数据引自文献[33],海南岛数据引自文献[34]

    Fig.  4  REE upper crust standardized distribution of Core TS6 sediments and potential provenance area

    The data of rivers in Taiwan are cited from reference [29], the data of northern Luzon Island are cited from reference [30], the data of Zhujiang River are cited from reference [31], the data of Red River and Mekong River are cited from reference [32], the data of Changjiang River are cited from reference [33], the data of Hainan Island are cited from reference [34]

    图  5  TS6岩芯沉积物与潜在物源区的REE分异参数对比

    台湾河流数据引自文献 [29],吕宋岛北部数据引自文献 [30],珠江数据引自文献 [31],长江数据引自文献 [33]

    Fig.  5  Comparison of REE differentiation parameters between Core TS6 sediments and potential provenance areas

    The data of rivers in Taiwan are cited from reference [29], the data of northern Luzon Island are cited from reference [30], the data of Zhujiang River are cited from reference [31], the data of Changjiang River are cited from reference [33]

    图  6  TS6岩芯沉积物与潜在物源区的轻重稀土及其上地壳标准化值分布对比

    台湾河流数据引自文献 [29],珠江数据引自文献 [31]

    Fig.  6  Comparison of the light and heavy rare earth elements and their normalized value distribution of Core TS6 sediments and potential provenance areas

    The data of rivers in Taiwan are cited from reference [29], the data of Zhujiang River are cited from reference [31]

    图  7  TS6岩芯沉积物高岭石−(伊利石+绿泥石)−蒙脱石三角端元图

    台湾河流数据引自文献[36],珠江数据引自文献[37],吕宋岛数据引自文献[38],湄公河和红河数据引自文献[39],长江数据引自文献[40],海南岛数据引自文献[12]

    Fig.  7  Kaolinite-(illite+chlorite)-montmorillonite triangular end member diagram of Core TS6 sediments

    The data of rivers in Taiwan are cited from reference [36], the data of Zhujiang River are cited from reference [37], the data of northern Luzon Island are cited from reference [38], the data of Red River and Mekong River are cited from reference [39], the data of Changjiang River are cited from reference [40], the data of Hainan Island are cited from reference [12]

    图  8  TS6岩芯沉积物伊利石结晶度与伊利石风化指数判别图

    台湾河流数据引自文献 [36],珠江数据引自文献 [37],长江数据引自文献 [40]

    Fig.  8  Illite crystallinity-illite chemical index discriminant diagram of Core TS6 sediments

    The data of rivers in Taiwan are cited from reference [36], the data of Zhujiang River are cited from reference [37], the data of Changjiang River are cited from reference [40]

    图  9  研究区周边洋流分布及黏土矿物输运模式

    洋流模式参考文献[12]

    Fig.  9  Ocean current distribution and clay mineral transport mode around the study area

    The model of ocean current is cited from reference [12]

    图  10  TS6岩芯沉积物部分参数比值、沉积速率和南海海平面随时间的变化

    Fig.  10  Parameter ratio, deposition rate and changes of the South China Sea sea level over time of Core TS6 sediments

    表  1  TS6岩芯REE含量及相关参数

    Tab.  1  REE content and related parameters of Core TS6

    参数ΣREE含量/10−6ΣLREE含量/10−6ΣHREE含量/10−6LREE/HREE(La/Yb)UCC(La/Sm)UCC(Gd/Yb)UCCδCe值δEu值
    最大值158.47146.9812.2212.921.890.961.801.030.72
    最小值112.21101.768.599.551.130.811.340.940.59
    平均值129.56119.2010.3611.521.490.891.480.980.66
      注:UCC为上地壳。
    下载: 导出CSV

    表  2  TS6岩芯黏土矿物含量及相关参数

    Tab.  2  Clay mineral content and related parameters of Core TS6

    黏土矿物伊利石含量/%绿泥石含量/%高岭石含量/%蒙脱石含量/%伊利石结晶度/°Δ2θ伊利石风化指数
    最大值68.7124.0411.277.190.310.47
    最小值62.3718.757.760.150.260.29
    平均值64.9420.789.384.900.290.36
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-09-01
  • 修回日期:  2020-11-02
  • 网络出版日期:  2021-04-30
  • 刊出日期:  2021-08-25

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