Distribution and sources of some metals in the sediment core from Xiangshan bay,East China Sea
SUN Wei-ping1, XU Xiao-qun1, LIU Qiang1, ZENG Jiang-ning1, LAN Mu-sheng2, LIU Rui-juan3,4, ZHAO Chen-hui1, PAN Jian-ming1
1. The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
2. Polar Research Institute of China, Shanghai 200136, China;
3. Marine Monitoring and Forecasting Centre of Zhejiang Province, Hangzhou 310007, China;
4. China University of Geosciences, Wuhan 430074, China
Abstract：Major and trace elements in marine sediment can reflect the sources of marine substances,environment and climate changes.In the present study,a sediment core was collected and the contents of metals in the core were analyzed using X-fluorescence spectrometer in order to investigate the temporal distribution of these elements in Xiangshan bay,East China Sea.Combined with the distribution of organic carbon,inorganic carbon,total nitrogen and grain size,the sources of metals in the core were discussed according to the enrichment factor and principle component analysis.The results show that the metal contents range from 0.45% to 0.52% for Ti,from 2.14% to 2.58% for K,from 2.48% to 3.13% for Ca,from 4.54% to 5.83% for Fe,from 546×10-6 to 868×10-6 for Mn,from 23×10-6 to 37×10-6 for Pb,and from 113×10-6 to 130×10-6 for Rb.They were comparable to those obtained from the other offshore regions of China.Lead was significantly enriched since 1980s,which is suggested to be influence by human activities in the recent years.No obvious enrichment was observed for K,Ca,Fe,Mn and Rb and their main sources are mineral particles derived from the erosion and weathering of the surrounding basement. Metals of Ti、K、Fe、Mn、Rb and Pb are prone to be enriched in the sediments rich in organic matters,while Ca is deposited as inorganic calcium carbonate in the core.Comparing with the annual change of precipitation during summer in the Yangtze valley,it is suggested that mineral sourced metals are good indicator for the abnormal precipitation in geological time.
SUN Wei-ping,XU Xiao-qun,LIU Qiang et al. Distribution and sources of some metals in the sediment core from Xiangshan bay,East China Sea[J]. Marine Environmental Science, 2017, 36(2): 222-228.
WEI G J,LIU Y,LI X H,et al.Major and trace element variations of the sediments at ODP Site 1144,South China Sea,during the last 230 ka and their paleoclimate implications[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2004,212(3/4):331-342.
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