FN Archimer Export Format
PT J
TI Evidence for hydrothermal venting in Fe isotope compositions of the deep Pacific Ocean through time
BT 
AF CHU, Nan-Chin
   JOHNSON, C
   BEARD, B
   GERMAN, C
   NESBITT, R
   FRANK, M
   BOHN, Marcel
   KUBIK, P
   USUI, A
   GRAHAM, I
AS 1:1;2:2;3:2;4:1;5:1;6:3;7:4,5;8:6;9:7;10:8;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England.
   Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA.
   ETH, Dept Earth Sci, Inst Isotope Geol & Mineral Resources, CH-8092 Zurich, Switzerland.
   IFREMER, Microsonde Ouest, F-29280 Plouzane, France.
   CNRS, Ctr Brest, F-29280 Plouzane, France.
   ETH Honggerberg, Paul Scherrer Inst, Inst Particle Phys, CH-8093 Zurich, Switzerland.
   Kochi Univ, Dept Earth Hist & Environm Sci, Kochi, Japan.
   Inst Geol & Nucl Sci, Wellington, New Zealand.
C2 NOC, UK
   UNIV WISCONSIN, USA
   ETH ZURICH, SWITZERLAND
   IFREMER, FRANCE
   CNRS, FRANCE
   ETH ZURICH, SWITZERLAND
   UNIV KOCHI, JAPAN
   INST GEOL & NUCL SCI, NEW ZEALAND
SI BREST
SE PDG-DOP-DCB-GM-LGM
IN WOS Ifremer jusqu'en 2018
   copubli-europe
   copubli-int-hors-europe
IF 3.887
TC 62
UR https://archimer.ifremer.fr/doc/2006/publication-3700.pdf
LA English
DT Article
DE ;Pacific Ocean;Izu Bonin;Hydrothen nal;Ferromanganese crusts;Fe isotopes
AB Temporal variations in Fe isotope compositions at three locations in the Pacific Ocean over the last 10 Ma are inferred from high-resolution analyses of three hydrogenetic ferromanganese crusts. Iron pathways to the central deep Pacific Ocean appear to have remained constant over the past 10 Ma, reflected by a remarkably constant Fe isotope composition, despite large changes in the Fe delivery rates to the surface ocean via dust. These results suggest that the Fe cycle in the deep ocean is decoupled from that in surface waters. By contrast, one ferromanganese crust from the Izu-Bonin (IB) back-arc/marginal basin of the W. Pacific exhibits large delta Fe-56 variations. In that crust, decreases in delta Fe-56 values correlate with increases in Mn, Mg, Ni, Cu, Zn, Me, and V contents, and consistent with periods of intense hydrothermal input and increased growth rates. A second crust located within 100 km of the first IB sample does not record any of these periods of enhanced hydrothermal input. This probably reflects the isolated pathways by which hydrothermally sourced Fe may have migrated in the back arc, highlighting the high degree of provinciality that Fe isotopes may have in the modem (oxic) oceans. Our results demonstrate that despite efficient removal at the source, hydrothermal Fe injected into the deep ocean could account for a significant fraction of the dissolved Fe pool in the deep ocean, and that hydrothermally sourced Fe fluxes to the open ocean may have lower delta(56) Fe values than those measured so far in situ at hydrothermal vents. Correlation between 656 Fe values and elements enriched in hydrothermal fluids may provide a means for distinguishing hydrothermal Fe from other low-delta Fe-56 sources to the oceans such as dissolved riverine Fe or porewaters in continental shelf sediments. (c) 2006 Elsevier B.V. All rights reserved.
PY 2006
PD MAY
SO Earth and Planetary Science Letters
SN 0012-821X
PU Elsevier
VL 245
IS 1-2
UT 000238601100017
BP 202
EP 217
DI 10.1016/j.epsl.2006.02.043
ID 3700
ER

EF