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中国东部海域表层沉积物稀土元素赋存特征及物源探讨

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文章导航 > 中国地质 > 2020 > 47(5): 1530-1541

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密蓓蓓, 张勇, 梅西, 仇晓华, 赵维娜, 蓝先洪. 2020. 中国东部海域表层沉积物稀土元素赋存特征及物源探讨[J]. 中国地质, 47(5): 1530-1541. doi: 10.12029/gc20200517
引用本文: 密蓓蓓, 张勇, 梅西, 仇晓华, 赵维娜, 蓝先洪. 2020. 中国东部海域表层沉积物稀土元素赋存特征及物源探讨[J]. 中国地质, 47(5): 1530-1541. doi: 10.12029/gc20200517
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MI Beibei, ZHANG Yong, MEI Xi, QIU Xiaohua, ZHAO Weina, LAN Xianhong. 2020. The rare earth element content in surface sediments of coastal areas in eastern China's sea areas and an analysis of material sources[J]. Geology in China, 47(5): 1530-1541. doi: 10.12029/gc20200517
Citation: MI Beibei, ZHANG Yong, MEI Xi, QIU Xiaohua, ZHAO Weina, LAN Xianhong. 2020. The rare earth element content in surface sediments of coastal areas in eastern China's sea areas and an analysis of material sources[J]. Geology in China, 47(5): 1530-1541. doi: 10.12029/gc20200517
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中国东部海域表层沉积物稀土元素赋存特征及物源探讨

  • 1.

    自然资源部天然气水合物重点实验室，青岛海洋地质研究所，山东 青岛 266071

  • 2.

    海洋矿产资源评价与探测技术功能实验室，青岛海洋科学与技术国家实验室，山东 青岛 266071

  • 3.

    山东省第一地质矿产勘查院，山东 济南 250100

  • 4.

    西北工业大学青 岛研究院，山东 青岛 266200

  • 基金项目:
    中国地质调查局项目（DD20160137，DD20160138，DD20190208）、国家海洋局海洋沉积与环境地质重点实验室开放基金（MASEG201708）及中国科学院海岸带环境过程与生态修复重点实验室开放基金（2018KFJJ04）联合资助
详细信息
    作者简介: 密蓓蓓，女，1984年生，高级工程师，从事海洋地质学研究；E-mail: mpp302@163.com
    通讯作者: 张勇，男，1970年生，研究员，博士生导师，从事海洋地质学方面的研究；E-mail: qimgzy@163.com

  • 中图分类号: P736.2

The rare earth element content in surface sediments of coastal areas in eastern China's sea areas and an analysis of material sources

  • 1.

    Key Laboratory of Gas Hydrate, Ministry of Natural Resources, Qingdao Institute of Marine Geology, Qingdao 266071, Shandong, China

  • 2.

    Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology Qingdao 266071, Shandong, China

  • 3.

    No. 1 Institute of Geology and Mineral Resources of Shandong Province, Jinan 250100, Shandong, China

  • 4.

    Qingdao Research Institute, Northwestern Polytechnical University, Qingdao 266200, Shandong, China

  • Fund Project: Supported by Geological Survey Project (No. DD20160137, No. DD20190205, No. DD20190208); Opening foundation of the Key Laboratory of Marine Sedimentology & Environmental Geology, SOA (MASEG201708); Opening Foundation of Key Laboratory of Coastal Environmental Processes and Ecological Remediation, YICCAS (No.2018KFJJ04).
More Information
    Author Bio: MI Beibei, female, borm in 1984, senior engineer, mainly engages in marine geology,E-mail:mpp302@163.com .
    Corresponding author: ZHANG Yong, male, bom in 1970, pofessor, mainly engages in marine geology, E-mail:qimgzy@163.com

    摘要

  • 通过中国地质调查局近20年对中国东部海域的高精度调查取样，对渤海、黄海和东海表层沉积物中的稀土元素数据进行了系统总结，旨在揭示其赋存特征、分布规律及其控制因素。结果表明，整个中国东部海域大致可以划分为4个稀土含量富集区，分别位于渤海西部泥质区、南黄海中部泥质区、济州岛西南泥质区以及东海内陆架泥质区，富集区内的表层沉积物稀土含量普遍高于180 mg/g；稀土元素的球粒陨石配分模式和UCC配分模式显示出各海域较为一致的总体特征，与中国大陆的稀土元素分配曲线类似，指示了较强的陆源特征。通过对稀土元素各特征参数的相关性分析，发现与中国东部海域稀土元素含量相关性最强的是δEu，呈明显负相关，其次是沉积物的平均粒径，呈明显正相关。利用δEu-(La/Yb)n物源判别图对这4个稀土含量富集区的样品进行判别，结果表明渤海西部泥质区和南黄海中部泥质区的沉积物具有同源性；南黄海东南部的济州岛西南部泥质区除了有来自长江和黄河物质以外，朝鲜半岛东南部的河流输入作用也不可忽视；东海内陆架泥质区北端的沉积物基本来源自长江，而南端则表现出不同的稀土分馏特征，很可能与闽浙沿岸和台湾岛中小河流的输入有关。大型河流和中小河流带来的物源、沉积物粒度以及海域流系格局控制了中国东部海域表层沉积物稀土元素的地球化学特征。

    The geochemical characteristics of rare earth elements in the surface sediments of the Bohai Sea, the Yellow Sea and the East China Sea have been studied systematically and macroscopically through the investigation, sampling, testing and analysis of eastern China's sea areas by China Geological Survey in the past 20 years. The results show that there are four REE enriched areas in the surface sediments of the eastern coast of China with the REE content generally higher than 180 μg/g. The distribution of highvalue areas is consistent with mud areas in eastern coast of China, such as mud area of western Bohai Sea, middle of south Yellow Sea, southeast of Jeju Island and inner shelf of the East China Sea. Chondrite- normalized REE patterns and UCC- normalized patterns in the surface sediments of the three seas are relatively homogeneous, with the distribution characteristics similar to features of China's mainland. It is found that δEu is most strongly negatively correlated with the content of rare earth elements in eastern China's sea areas, followed by the average grain size of sediments with significant positive correlation, as shown by the correlation analysis of the characteristic parameters of rare earth elements. The δEu- (La/Yb)n map was used to identify the material sources for the REE high-value areas, and the result indicates that the sediments in the mud area of west Bohai Sea and the middle of south Yellow Sea are mainly from the same source. It is generally considered that sediments from the mud area of the southwest of Jeju Island are mainly from Yangtze River and Yellow River, but the river input from the southeast of the Korean Peninsula can't be ignored, that the sediments from the north end of the mud area of the inner shelf of the East China Sea are basically from the Yangtze River, while the south end shows different REE fractionation characteristics which are related to the input of small and mediumsized rivers along the coast of Fujian, Zhejiang and Taiwan Island. The material source, sediment grain size brought by large and middle-small rivers and the flow system patterns of the sea areas jointly determine the geochemical characteristics of REE in the surface sediments of eastern China's sea areas.

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  • 图 1  中国东部海域表层沉积物平均粒径(Φ)、砂、粉砂、黏土含量（%）分布图

    Figure 1. 

    下载: 全尺寸图片 幻灯片

    图 2  渤、黄和东海表层沉积物稀土元素平均值与球粒陨石（左）、上陆壳（右）标准化配分曲线

    Figure 2. 

    下载: 全尺寸图片 幻灯片

    图 3  中国东部海域表层沉积物稀土元素参数(∑REE、∑LREE/∑HREE、(La/Yb)n、δEu)分布图

    Figure 3. 

    下载: 全尺寸图片 幻灯片

    图 4  δEu-(La/Yb)n判别图

    Figure 4. 

    下载: 全尺寸图片 幻灯片

    表 1  中国东部海域表层沉积物稀土元素丰度(mg/g)及特征参数

    Table 1.  REE content (mg/g) and characteristic parameters of surface sediments in eastern China's sea areas

    下载: 导出CSV

    表 2  中国东部海域表层沉积物稀土元素特征参数相关性分析

    Table 2.  Correlation analysis of characteristic parameters of rare earth elements in surface sediments of eastern China's sea areas

    下载: 导出CSV
    • 参考文献(55)

  • Cheng Tianwen, Zhao Chunian. 1985. Runoff volumes and sediment discharge of large rivers in China and their influence on the coastal zone[J]. Acta Oceanologica Sinica, 7(4):460-471 (in Chinese with English abstract). http://www.researchgate.net/publication/288194446_Runoff_volumes_and_sediment_discharges_of_large_rivers_in_China_and_their_influence_on_the_coastal_zone

    Crichton J G, Condie K C. 1993. Trace elements as source indicators in cratonic sediments: A case study from the Early Proterozoic Libby Creek Group, southeastern Wyoming [J]. Journal of Geology, 101(3): 319-332. https://www.journals.uchicago.edu/doi/abs/10.1086/648226

    Cullers R L, Barrett T, Carlson R, Robinson B. 1987. REE and mineralogical changes in Holocene soil and stream sediment: A case study in the Wet Mountains, Colorado, U.S.A.[J]. Chemical Geology, 63(3/4): 275-297. http://www.sciencedirect.com/science/article/pii/0009254187901677

    Cullers R L. 1994. The controls on the major and trace element variation of shales, siltstones sandstones of Pennsylvanian- Permian age from uplifted continental block in Colorado to platform sediment in Kansas, USA [J]. Geochim Cosmochim Acta, 58(22): 4955-4972. doi: 10.1016/0016-7037(94)90224-0

    Cullers R L. 2000. The geochemistry of shales, siltstones and sanstones of Pennsylvanian- Permian age, Colorado, USA: Amplications for provenance and metamorphic studies [J]. Lithos, 51(3): 181-203. doi: 10.1016/S0024-4937(99)00063-8

    Dou Yanguang, Li Jun, Li Yan. 2012. Rare earth epositions and provenance implication of surface sediments in the eastern Beibu Gulf[J]. Geochimica, 41(2):147-157(in Chinese with English abstract). https://core.ac.uk/display/41443926

    Duan Xiaoyong, Yin Ping, Liu Jinqing, Cao Ke, Gao Fei, Chen Xiaoying. 2019.Modern sedimentation environments in the coastal zone of East China[J]. Marine Geology & Quaternary Geology, 39 (2): 14-20 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201902002

    Guo Yulong, Yang Shouye, Su Ni, Yin Ping, Wang Zhongbo. 2018. Rare earth element geochemistry of the sediments from small rivers draining Southeast China[J]. Marine Geology & Quaternary Geology, 38(1): 139-149(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201801014

    Guo Zhigang, Yang Zuosheng, Zhang Dongqi, Fan Dejiang, Lei Kun. 2002. Seasonal distribution of suspended matter in the northern East China Sea and barrier effect of current circulation on its transport[J]. Acta Oceanologica Sinica, 24(5):71- 80 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hyxb200205009

    Jiang Fuqing, Zhou Xiaojing, Li Anchun, Li Tiegang. 2008.The discrimination plot of δEuN- ΣREEs in the Yangtze River and the Yellow River sediments[J]. Science in China: Series D, 38(11) : 1460-1468(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTotal-JDXG200902010.htm

    Lan Xianhong, Shen Shunxi. 2002.Geochemical characteristics of rare earth elements of sediment cores from the central South Yellow Sea[J]. Marine Science Bulletin, 21(5) : 46- 53 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hytb200205007

    Li Chuanshun, Shi Xuefa, Kao Shuh JI, Liu Yanguang, Lü Huahua, Zou Jianjun, Liu Shengfa, Qiao Shuqing. 2013. Rare earth elements in fine-grained sediments of major rivers from the high- standing island of Taiwan[J]. Journal of Asian Earth Sciences 69: 39-47. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=fc9a6b8ad7b40f65d30173f7a999918a

    Li Jun, Gong Zhenbin, Li Yunchun, Wen Yuyun, Yang Yiping. 2005. Marine geochemistry approaches of rare earth elements in coastal and Estuarial areas[J].Advances in Earth Science, 20(1): 64- 73(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqkxjz200501012

    Liu Jian, Qin Huafeng, Kong Xianghuai, Li Jun. 2007.Comparative research on the magnetic properties of muddy sediments from the Yellow Sea and East China Sea sediments and Korea Strait[J]. Quaternary Science, 27(6):1031- 1039(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DSJJ200706020.htm

    Liu Shengfa, Shi Xuefa, Liu Yanguang, Qiao Shuqing, Yang Gang, Fang Xisheng, Wu Yonghua, Li Chaoxin, Li Xiaoyan, Zhu Aimei, Gao Jingjing. 2010. Records of the East Asian winter monsoon from the mud area on the inner shelf of the East China Sea since the min-Holocene[J].Chinese Science Bulletin, 55(14):1387-1396 (in Chinese with English abstract). doi: 10.1360/csb2010-55-14-1387

    MacRae N D, Nesbitt H W, Kronberg B Ⅰ. 1992. Development of a positive Eu anomaly during diagenesis[J]. Earth and Planetary Science Letters, 109: 585-591. doi: 10.1016/0012-821X(92)90116-D

    McLennan S M. 1989. Rare earth elements in sedimentary rocks: Influences of provenance and sedimentary processes[J]. Reviews in Mineralogy and Geochemistry, 21(1): 169-200. http://ci.nii.ac.jp/naid/10008805387

    Mi Beibei, Liu Shengfa, Shi Xuefa, Li Xiaoyan, Pan Huijuan, Chen Minte, Wang Xuchen, 2017. A high resolution record of rare earth element compositional changes from the mud deposit on the inner shelf of the East China Sea: Implications for paleoenvironmental changes[J]. Quaternary International, 447: 35-45. doi: 10.1016/j.quaint.2016.09.056

    Milliman J D, Meade R H. 1983.World- wide delivery of river sediment to the ocean[J]. Journal of Geology, 91:1-21 doi: 10.1086/628741

    Milliman J D, Shen Huangting, Yang Zuosheng, Mead R. H. 1985. Transport and deposition of river sediment in the Changjiang estuary and adjacent continental shelf[J]. Continental Shelf Research, 4 (1/2):37-45. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=kVEMHXGqC0rRW090C1KeiLMjsw5J08lGSFH4nNGsv9w=

    Niels C M, Kezia L D. 2003. Rare earth elements as provenance indicators in North Australian estuarine and coastal marine sediments[J]. Estuarine, Coastal and Shelf Science, 57:399-409. doi: 10.1016/S0272-7714(02)00368-2

    Qin Yunshan, Zheng Tiemin. 1982. Geology of Yellow Sea and East China Sea[M]. Beijing: Science Press (in Chinese with English abstract).

    Qin Yunshan. 1963. Primary study on the topography and the sedimentation type in continental shelf sea of China[J].Oceanologia et Limnologia Sinica, 5(1):71-86 (in Chinese with English abstract). https://www.sciencedirect.com/science/article/pii/0025322767900746

    Schubel J R, Shen H T, Park M J. 1984. A comparision of some characteristic sedimentation processes of estuaries entering the Yellow Sea[C]//Marine Geology Geophysical Processes of the Yellow Sea, Energy Resource: 286-308.

    Shi Xuefa, Liu Shengfa, Qiao Shuqing, Yao Zhengquan, Liu Yanguang. 2015. Geochemical characteristics, controlling factor and record of paleoclimate in sediments from eastern China Seas[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 34 (5):885-894(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=kwysdqhxtb201505002

    Singh Pramod, Rajamani Ⅴ. 2001. REE geochemistry of recent clastic sediments from the Kaveri floodplains, Southern India: Implication to source area weathering and sedimentary processes[J]. Geochimica et Cosmochimica Acta, 65(18):3093-3108. doi: 10.1016/S0016-7037(01)00636-6

    Taylor S R, Mclennan S M. 1985. The continental crust: Its composition and evolution[J]. The Journal of Geology, 94(4):57- 72. http://doc63.dhjkbooks.com/the-continental-crust-its-composition-and-evolution-_P_1503m.pdf

    Wang Fenlian, He Gaowen, Yao Huiqiang, Deng Xiguang. 2017. The progress in the study of REE-Rich deep-sea sediments[J]. Geology in China, 44(3): 449-459(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgdizhi201703004

    Wang Houjie, Yang Zuosheng, Saito Yoshiki, Liu J P, Sun Xiaoxia. 2006. Interannual and seasonal variation of the Huanghe (Yellow River) water discharge over the past 50 years: Connections to impacts from ENSO events and dams[J]. Global & Planetary Change, 50(3/4):212-225. https://ui.adsabs.harvard.edu/abs/2006GPC....50..212W/abstract

    Wang Jintu.1990. REE geochemistry of surficial sediments From the Yellow Sea of China [J]. Geochimica, 1: 44- 53 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000000258289

    Yang Shouye, Jung H S, Choi M S. 2002.The rare earth element compositions of the Changjiang (Yangtze) and Huanghe (Yellow) river sediments [J]. Earth and Planetary Science Letters, 201: 407- 419. doi: 10.1016/S0012-821X(02)00715-X

    Yang Shouye, Jung Hoi Soo, Lim Dhong iI, Li Congxian. 2003. A review on the provenance discrimination of sediments in the Yellow Sea[J]. Earth Science Reviews, 63(1):93-120. https://www.sciencedirect.com/science/article/abs/pii/S0012825203000333

    Yang Shouye, Li Congxian, Lee C B, Na T K. 2003.REE geochemistry of suspended sediments from the rivers around the Yellow River and provenance indicators[J].Chinese Science Bulletin, 48(11): 1135-1139. doi: 10.1007/BF03185768

    Yang Shouye, Li Congxian.1999. REE geochemistry and tracing application in the Yangtze River and the Yellow River sediments[J]. Geochimica, 28 (4) :374-380(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQHX199904008.htm

    Yang Zuosheng, Wang Haicheng, Qiao Shuqing. 2009. Carbonate minerals in estuary sediments of the Changjiang(Yangtze River) and Huanghe(Yellow River): The content, morphology, and influential factors[J]. Oceanologia et Limnologia Sinica, 40(6): 674-681. http://www.oalib.com/paper/1583410

    Zhao Yiyang, Yan Mingcai. 1994.Geochemistry of Sediments of the China Shelf Sea[M]. Beijing: Science Press(in Chinese with English abstract).

    Zhu Laimin, Gao Zhiyou, Yin Guan, Xu Jiang. 2007.Content and spatial change of rare earth element and trace element of surficial sediment in the South China Sea[J]. Acta Petrologica, 23(11):2963-2980 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ysxb98200711027

    程天文, 赵楚年. 1985.中国主要河流入海径流量、输沙量及对沿岸的影响[J].海洋学报, 7(4):460-471. http://www.cnki.com.cn/Article/CJFDTotal-SEAC198504006.htm

    窦衍光, 李军, 李炎. 2012.北部湾东部海域表层沉积物稀土元素组成及物源指示意义[J].地球化学, 41(2):147-157. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqhx201202006

    段晓勇, 印萍, 刘金庆, 曹珂, 高飞, 陈小英. 2019.中国东部近海现代沉积环境[J].海洋地质与第四纪地质, 39(2): 14-20. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201902002

    郭玉龙, 杨守业, 苏妮, 印萍, 王中波. 2018.中国东南入海河流沉积物的稀土元素地球化学特征[J].海洋地质与第四纪地质, 38(1): 139-149. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201801014

    郭志刚, 杨作升, 张东奇, 范德江, 雷坤. 2002.冬、夏季东海北部悬浮体分布及海流对悬浮体输运的阻隔作用[J].海洋学报, 24: 71-80. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hyxb200205009

    蒋富清, 周晓静, 李安春, 李铁刚. 2008. δEuN-ΣREEs图解定量区分长江和黄河沉积物[J].中国科学D辑:地球科学, 38(11):1460-1468. http://www.cnki.com.cn/Article/CJFDTotal-JDXK200811015.htm

    蓝先洪.申顺喜. 2002.南黄海中部沉积岩芯的稀土元素地球化学特征[J].海洋通报, 21 (5) : 46-53. http://www.cnki.com.cn/Article/CJFDTotal-HUTB200205006.htm

    李俊, 弓振斌, 李云春, 温裕云, 杨逸萍. 2005.近岸和河口地区稀土元素地球化学研究进展[J].地球科学进展, 20(1): 64-73. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqkxjz200501012

    刘健, 秦华峰, 孔祥淮, 李军. 2007.黄东海陆架及朝鲜海峡泥质沉积物的磁学特征比较研究[J].第四纪研究, 27(6):1031-1039. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dsjyj200706019

    刘升发, 石学法, 刘焱光, 乔淑卿, 杨刚, 方习生, 吴永华, 李朝新, 李小艳, 朱爱美, 高晶晶. 2010.中全新世以来东亚冬季风的东海内陆架泥质沉积记录[J].科学通报, 55(14):1387-1396. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=kxtb201014014

    秦蕴珊, 郑铁民.1982.黄东海地质[M].北京:科学出版社.

    秦蕴珊.1963.中国陆架海的地形及沉积类型的初步研究[J].海洋与湖沼, 5(1):71-86. http://www.cnki.com.cn/Article/CJFDTotal-HYFZ196301008.htm

    石学法, 刘升发, 乔淑卿, 姚政权, 刘焱光. 2016.中国东部近海沉积物地球化学:分布特征、控制因素与古气候记录[J].矿物岩石地球化学通报, 34(5) :885-894. http://d.wanfangdata.com.cn/conference/7679903

    王汾连, 何高文, 姚会强, 邓希光. 2017.深海沉积物中的稀土矿产资源研究进展[J].中国地质, 44(3):449-459. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgdizhi201703004

    王金土. 1990.黄海表层沉积物稀土元素地球化学[J].地球化学, 1:44-53. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000000258289

    杨守业, 李从先. 1999.长江与黄河现代表层沉积物元素组成及其示踪作用[J].自然科学进展, 10:68-75. http://www.cnki.com.cn/Article/CJFDTotal-ZKJZ199910009.htm

    赵一阳, 鄢明才. 1994.中国浅海沉积物地球化学[M].北京:科学出版社.

    朱赖民, 高志友, 尹观, 许江. 2007.南海表层沉积物的稀土和微量元素的丰度及其空间变化[J].岩石学报, 3(11):2963-2980. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ysxb98200711027

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收稿日期:  2020-06-24
修回日期:  2020-08-10
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