MODE OF ELEMENT OCCURRENCE IN SURFACE SEDIMENTS FROM EAST PACIFIC RISE NEAR 13&#176;N AND THE EQUATOR

LI Kang; ZENG Zhigang; YIN Xuebo; CHEN Shuai; WANG Xiaoyuan; ZHANG Guoliang; CHEN Daigeng; WANG Xiaomei

doi:10.3724/SP.J.1140.2009.03053

2009 Vol. 29, No. 3

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Article navigation > Marine Geology & Quaternary Geology > 2009 > 29(3): 53-60

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LI Kang, ZENG Zhigang, YIN Xuebo, CHEN Shuai, WANG Xiaoyuan, ZHANG Guoliang, CHEN Daigeng, WANG Xiaomei. MODE OF ELEMENT OCCURRENCE IN SURFACE SEDIMENTS FROM EAST PACIFIC RISE NEAR 13°N AND THE EQUATOR[J]. Marine Geology & Quaternary Geology, 2009, 29(3): 53-60. doi: 10.3724/SP.J.1140.2009.03053

Citation:

LI Kang, ZENG Zhigang, YIN Xuebo, CHEN Shuai, WANG Xiaoyuan, ZHANG Guoliang, CHEN Daigeng, WANG Xiaomei. MODE OF ELEMENT OCCURRENCE IN SURFACE SEDIMENTS FROM EAST PACIFIC RISE NEAR 13°N AND THE EQUATOR[J]. Marine Geology & Quaternary Geology, 2009, 29(3): 53-60. doi: 10.3724/SP.J.1140.2009.03053

MODE OF ELEMENT OCCURRENCE IN SURFACE SEDIMENTS FROM EAST PACIFIC RISE NEAR 13°N AND THE EQUATOR

1 Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Received Date: 09 January 2009

Revised Date: 29 March 2009

Abstract

Abstract

In order to assess the influence of seafloor hydrothermal activity on element occurrence in sediments, we carried out sequential extraction procedures and whole-rock analysis for the surface sediments(17A-EPR-TVG1, 17A-EPR-TVG5) collected from East Pacific Rise near 13°N and the equator, and discussed mode of element occurrence of Al,Ca,Fe,Mn,Ti,Ba,Zn,Cu,Sr,V,Mo,U and rare earth elements (REE).XRD results indicate that the primary mineral phase of 17A-EPR-TVG1 is pyrite and 17A-EPR-TVG5 sample has calcite as its main mineral. Elements except Ca and Sr of 17A-EPR-TVG1 which were greatly affected by hydrothermal activity mainly occur in the residual phase and ferromanganese oxide phase. However, elements except Al,Ba and Ti of 17A-EPR-TVG5 which is characteristic of normal deep ocean sediment mainly concentrate in carbonate phase and ferromanganese oxide phase. The sequential extraction results indicate that, the shale-normalized REE distribution pattern of the REEs in the sediments exhibits a positive Eu anomaly in all the four phases of 17A-EPR-TVG1,while the negative Ce anomaly occurs in the four phases of 17A-EPR-TVG5. We come to the conclusion that the sea water and hydrothermal fluid participated in the formation of the sediments.
- mode of element occurrence /
- surface sediments /
- seafloor hydrothermal /
- sequential extraction /
- East Pacific Rise

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References

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