吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (1): 85-95.doi: 10.13278/j.cnki.jjuese.20180099

• 大陆架科学钻探 • 上一篇    

南黄海陆架区CSDP-1孔沉积物碎屑锆石U-Pb年龄物源判别

何梦颖1,2, 梅西3,4, 张训华5, 刘健3,4, 郭兴伟3,4, 郑洪波6,7   

  1. 1. 南京师范大学地球科学学院, 南京 210023;
    2. 江苏省地理信息资源开发与利用协同创新中心, 南京 210023;
    3. 中国地质调查局青岛海洋地质研究所, 山东 青岛 266071;
    4. 青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室, 山东 青岛 266071;
    5. 中国地质调查局南京地质调查中心, 南京 210016;
    6. 云南大学地球系统科学研究中心, 昆明 650500;
    7. 中国科学院青藏高原研究所, 北京 100101
  • 收稿日期:2018-05-10 发布日期:2019-01-18
  • 作者简介:何梦颖(1985-),女,讲师,博士,主要从事河流演化及沉积物物源示踪方面的研究,E-mail:conniehe@njnu.edu.cn
  • 基金资助:
    国家海洋地质专项（DD20160147）；国家自然科学基金项目（41602180）；江苏省基础研究计划（自然科学基金）项目（BK20150974）

Provenance Discrimination of Detrital Zircon U-Pb Dating in the Core CSDP-1 in the Continental Shelf of South Yellow Sea

He Mengying1,2, Mei Xi3,4, Zhang Xunhua5, Liu Jian3,4, Guo Xingwei3,4, Zheng Hongbo6,7   

  1. 1. School of Geography Science, Nanjing Normal University, Nanjing 210023, China;
    2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China;
    3. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong, China;
    4. Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266071, Shandong, China;
    5. Nanjing Center, China Geological Survey, Nanjing 210016, China;
    6. Research Center of Earth System Science, Yunnan University, Kunming 650500, China;
    7. Institute of Tibetan Plateau Research, CAS, Beijing 100101, China
  • Received:2018-05-10 Published:2019-01-18
  • Supported by:
    Supported by National Marine Geology Special Project of China (DD20160147),Natural Science Foundation of China (41602180) and Natural Science Foundation of Jiangsu Province (BK20150974)

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摘要： 南黄海作为东部陆架海的一部分，其沉积物记录了源区、气候及古环境演变等多方面的信息。本文利用激光剥蚀等离子体质谱（LA-ICPMS）的方法，对南黄海西部CSDP-1孔沉积物进行了碎屑锆石U-Pb年龄测定。结果表明，CSDP-1孔沉积物碎屑锆石主要表现出300~100，500~300，1 000~700，2 100~1 700和2 600~2 300 Ma 5组年龄区间。由底部到顶部，钻孔沉积物中除了1 000~700和2 100~1 700 Ma的锆石质量分数变化较大，其他年龄组的锆石质量分数没有明显的变化趋势；长江、黄河、废黄河和淮河作为钻孔区域可能的物质来源，其沉积物碎屑锆石U-Pb年龄分布存在显著差异，其中长江沉积物以1 000~700 Ma的锆石为特征，黄河沉积物中2 100~1 700 Ma的锆石质量分数最高，废黄河与淮河沉积物中500~300 Ma的锆石质量分数均比黄河和长江沉积物高。通过对CSDP-1钻孔及河流沉积物进行物源判别并结合相关性分析可认为：钻孔沉积物3.20 Ma以来存在多源物质贡献，长江源物质占优势，淮河源次之；淮河从2.16 Ma开始对钻孔区域有影响；0.78 Ma该区开始有黄河源的物质，且以黄河沉积物为主要物质来源；废黄河对钻孔区域几乎没有影响。

关键词: 南黄海, CSDP-1孔, 碎屑锆石U-Pb定年, 物源示踪

Abstract: South Yellow Sea is the part of the eastern shelf sea,and its sediments record the information of the sources, the climate and the paleo-environmental evolution. The detrital zircon U-Pb dating of the Core CSDP-1 in the western South Yellow Sea was determined by laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). The results show that the zircon age distribution of the Core CSDP-1 sediment mainly falls into five groups:300-100, 500-300,1 000-700,2 100-1 700 and 2 600-2 300 Ma. From the bottom to the top, the zircon contents in the sediments do not vary greatly except in the age groups of 1 000-700 Ma and 2 100-1 700 Ma; The Yangtze River, the Yellow River, the Old Yellow River and the Huaihe River are the possible sources of the drilling area. The detrital zircon U-Pb age distribution in sediments is significantly different, among which the Yangtze River sediments are characterized by 1 000-700 Ma zircons,and the content of 2 100-1 700 Ma zircon in the Yellow River sediments is the highest. The content of 500-300 Ma zircons from the Old Yellow River and the Huaihe River sediments are higher than that in the Yellow River and the Yangtze River. Combined with the Core CSDP-1 and the river sediments,it can be concluded that the core site has been contributed by multi-source materials since 3.20 Ma. The Yangtze River is the dominant source, followed by the Huaihe River. However, the Huaihe River didn't affected the core area until 2.16 Ma. The material of the Yellow River started to be found in the drilling area at about 0.78 Ma; and since then,the Yellow River has been the main material source of the core site. The Old Yellow River had almost no effect on the drilling area.

Key words: South Yellow Sea, Core CSDP-1, detrital zircon U-Pb dating, provenance tracing

中图分类号: 

  • P736.4
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