Journal of Marine Sciences ›› 2017, Vol. 35 ›› Issue (1): 55-65.DOI: 10.3969/j.issn.1001-909X.2017.01.007

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Clay mineral and geochemical analysis of surface sediments in the western region of CC Zone in the East Pacific Ocean

FU Feng1,2, ZHENG Yang1,2, YAO Xu-ying1,2, NI Jian-yu*1,2   

  1. 1. Second Institute of Oceanography, SOA, Hangzhou 310012, China;
    2. Key Laboratory of Submarine Geosciences, SOA, Hangzhou 310012, China
  • Received:2016-09-22 Revised:2016-12-30 Online:2017-03-15 Published:2022-11-17

Abstract: 12 surface sediment samples from the western region of CC Zone of the East Pacific Ocean were taken as the research material, and the particle size, chemical composition and mineral composition were analyzed to discuss its sedimentary environment and material source. The study area is located in the deep ocean, and the sediment is mainly composed of the abyssal clay and silicon calcareous clay. It contains a small amount of siliceous clay, clayey siliceous ooze and clayey calcareous ooze. Clay mineral composition is mainly smectite and illite, containing part of the kaolinite and chlorite. Clay minerals indicate that the sediments in the area are mainly terrigenous,which are carried by high airflow. The Antarctic Bottom Water and hydrothermal activity have a certain influence on the source of the provenance. The geochemical characteristics of sediments also indicate that the sediments are mainly derived from terrestrial sources. The distribution curve of the REE is similar to that in the surface water of the North Pacific Ocean, and it shows strong Ce losses, indicating that the bio-deposition caused by biological activities also has a certain impact on the surface sediments.

Key words: The East Pacific Ocean, The CC Zone, chemical composition, clay minerals, source

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