Journal of Marine Sciences ›› 2017, Vol. 35 ›› Issue (4): 44-60.DOI: 10.3969/j.issn.1001-909X.2017.04.005

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Geochemical characteristics of basalt samples from the ridges adjacent to Aden-Owen-Carlsberg Triple Junction and their mantle sources

HUANG Kai-hui1,2, HAN Xi-qiu*1,2, WANG Ye-jian1,2, QIU Zhong-yan1,2, LI Hong-lin1,2   

  1. 1. Second Institute of Oceanography, SOA, Hangzhou 310012, China;
    2. Laboratory of Submarine Geosciences, SOA, Hangzhou 310012, China
  • Received:2016-04-29 Revised:2016-05-25 Published:2022-11-21

Abstract: The major and trace elements as well as Sr-Nd-Pb isotope compositions of basalt samples were studied, which were obtained from the ridges adjacent to Aden-Owen-Carlsberg(AOC) Triple Junction. The results show that samples from Carlsberg Ridge are typical N-MORB derived from DMM-type mantle source; samples from Sheba also belong to N-MORB, but the mantle source contains some EMII component and hence is more enriched than that of Carlsberg Ridge; samples from Owen Ridge are OIB, probably reflecting the contamination of continental crust; the types of samples from Aden Ridge vary from N-MORB, E-MORB and perhaps continental basalt which derived from the different extent mixture of end-members from DMM, EMII and HIMU. Except for Carlsberg Ridge, all of the other ridges adjacent to AOC have been influenced by Afar Hot Spot.

Key words: Aden-Owen-Carlsberg Triple Junction, basalt, geochemical characteristics, mantle source

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