极地研究

极地研究 ›› 2023, Vol. 35 ›› Issue (3): 352-361.DOI: 10.13679/j.jdyj.20220402

• 研究论文 • 上一篇    下一篇

东南极普里兹湾沉积物中重金属的富集特征和来源分析

蒋文轩  于培松  张海峰  赵军  张慧娟  潘建明   

  1. 自然资源部第二海洋研究所, 自然资源部海洋生态系统动力学重点实验室, 浙江 杭州 310012

  • 出版日期:2023-09-30 发布日期:2023-09-30
  • 通讯作者: 潘建明
  • 作者简介:蒋文轩, 男, 1998年生。硕士研究生, 主要从事地球化学研究。E-mail: 2502379509@qq.com
  • 基金资助:
    国家海洋局极地考察办公室项目(IRASCC 01-01-02, 02-02)和国家自然科学基金(41976228)资助

Enrichment characteristics and source analysis of heavy metals in Prydz Bay sediments, East Antarctica

Jiang Wenxuan, Yu Peisong, Zhang Haifeng, Zhao Jun, Zhang Huijuan, Pan Jianming   

  1. Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, MNR, Hangzhou 310012, China
  • Online:2023-09-30 Published:2023-09-30

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摘要：

通过对中国第30次南极科学考察期间在东南极普里兹湾采集的岩芯ANT30/P1-02进行重金属含量的分析, 探讨了末次间冰期以来ANT30/P1-02岩芯重金属的富集特征和来源变化。结果表明, 重金属富集系数变化趋势与重金属含量变化趋势一致, 在不同时期重金属含量变化趋势明显, 可以被用来指示冰期-间冰期旋回特征。Pb、Zn、Ba元素均呈现富集现象, 其中Ba元素有明显的富集, Ge、Cd、Fe元素均没有富集或者富集不明显, 且富集系数在冰期与间冰期变化不明显, Ca元素在末次间冰期有明显的富集。通过不同来源输入的估算, 发现5种元素来源输入相差较大, Fe、Ge元素在末次冰期来源输入相差较大, Ba、Ca、Zn元素在末次间冰期来源输入相差较大。Fe、Ca元素更大程度上受岩源输入影响, Ge、Ba、Zn元素更大程度上受生源性物质输入的影响。Fe、Ge、Ba、Zn和Ca元素不同来源输入相差较大的原因与富集系数特征相符。

关键词: 南极, 普里兹湾, 重金属, 元素来源, 富集系数, 末次间冰期

Abstract:

Based on the analysis of heavy metal contents in the core ANT30/P1-02, collected in Prydz Bay, East Antarctica during the 30th Chinese National Antarctic Research Expedition, variations in their enrichment characteristics and sources since the last interglacial period are discussed. The results show that the change trend of heavy metal enrichment coefficient was consistent with that of the heavy metal content. Several clear differences in the heavy metal content trend were observed, and can be used to characterize the glacial cycle. Notable enrichments were measured for Pb, Zn and particularly for Ba. Conversely, Ge, Cd and Fe elements were not enriched, or not noticeable, with relatively little difference in enrichment coefficient is not obvious in the glacial period. Moreover, Ca enrichment was observed in the last interglacial period. By estimating heavy metal inputs from different sources, five sources with large differences were identified. During the last glacial period, sources of Fe and Ge exhibited notable variations. Marked source variations were also measured for Ba, Ca, and Zn, but during the last interglacial period. Fe and Ca were more affected by inputs from rocks, whereas Ge, Ba and Zn were more affected by biogenic material inputs. The large source variations observed for Fe, Ge, Ba, Zn and Ca were consistent with the measured enrichment coefficient variations.

Key words: Antarctica, Prydz Bay, heavy metal, element source, enrichment coefficient, last interglacial period