Abstract
Buried nodules have been found at two positions in the central Pacific at 25, 33, and 40 cm beneath the sediment surface in a depth, which, from Io-dating, is younger than 75,000 years. These nodules differ from surface nodules in that they have an unusual additional outer zone of material of high porosity containing sediment inclusions. The material in this additional zone has a high α activity. Beneath this zone, a normal α decrease was measured. The outer zone has a higher Cu/Mn ratio and lower Ni/Mn, Fe/Mn, and Co/Fe ratios than the inner zones. Element mobilization within the sediment is assumed to supply the buried nodules during their additional growth. A higher sedimentation rate and an atypical distribution of organic matter with depth at these two stations point up the exceptional environment of the buried nodules. Therefore, only a small number of nodules are assumed to grow further after being buried.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Deep Sea Research Part A. Oceanographic Research Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
