Accumulation rates of hydrothermal metalliferous sediments in the Lau Basin,S. W. Pacific |
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| Authors: | D S Cronan R Hodkinson D D Harkness S A Moorby G P Glasby |
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| Institution: | (1) Geology Dept., Imperial College, Prince Consort Road, SW7 2BP London, United Kingdom;(2) NERC Radiocarbon Laboratory, Scottish Universities Research and Reactor Centre, East Kilbride, G75 0QU Glasgow, Scotland;(3) New Zealand Oceanographic Institute, PO Box 12-346, Wellington, New Zealand |
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| Abstract: | Five cores were recovered on a traverse in the Lau Basin at 18°30′S crossing a supposed active spreading center. The sediments
were subjected to selective chemical leaching for Mn, Fe, Cu, Zn, and As. Accumulation rates were determined using14C. These rates increase from west to east, reflecting the influence of volcaniclastic inputs from the Tonga- Kermadec Ridge.
All elements display highest non-detrital accumulation rates closest to the supposed spreading center, suggesting a hydrothermal
input to the sediments there. Variable hydrothermal inputs also influence the other cores. |
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