Role of siliceous fossil dissolution in downcore variations of grain size and water content: Western margin of Clarion-Clipperton fracture zone, NE equatorial Pacific SCIE SCOPUS

Cited 0 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Role of siliceous fossil dissolution in downcore variations of grain size and water content: Western margin of Clarion-Clipperton fracture zone, NE equatorial Pacific
Author(s)
Jung, HS; Jeong, KS; Chu, YS; Park, SH; Kim, KH
KIOST Author(s)
Jung, Hoi Soo(정회수)Jeong, Kap Sik(정갑식)
Publication Year
2001-07
Abstract
Grain size and water content in box-core sediments from the Clarion-Clipperton fracture zone (C-C zone) in the northeast equatorial Pacific were analyzed in detail to understand the downcore variations across a hiatus between Quaternary and Tertiary layers. Grain-size distributions in the topmost core sediments show two modes: a coarse mode (peaked at 50 mum) and a fine mode (at 2-25 mum). The coarse mode disappears gradually with depth accompanied by the dissolution of siliceous fossil tests, whereas the fine mode coarsens due to the formation of authigenic minerals. Water content increases abruptly across a color boundary between an upper pale brown layer and a lower dark brown layer that is the hiatus between Quaternary and Tertiary layers. Abundant smectites and microvoid molds, which are created by the prolonged fossil dissolution in the underlying sediment, are attributed for the abrupt downcore variation of water content. Overall variations in grain size and water content in the topmost core sediments in the western C-C zone are possibly constrained by the dissolution of biogenic siliceous fossils. Variations in geotechnical properties related to these changes must be considered in the design of nodule collectors.
ISSN
1064-119X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5879
Bibliographic Citation
MARINE GEORESOURCES & GEOTECHNOLOGY, v.19, no.3, pp.181 - 195, 2001
Publisher
TAYLOR & FRANCIS INC
Subject
MANGANESE NODULE BELT; FERROMANGANESE NODULES; NORTH PACIFIC; SEDIMENTS; SEA; OCEAN
Keywords
water content; grain size; fossil dissolution; equatorial Pacific; manganese nodules; collector design
Type
Article
Language
English
Document Type
Article
Publisher
TAYLOR & FRANCIS INC
Related Researcher
Research Interests

Marine geology,해양지질

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