FN Archimer Export Format
PT J
TI The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir
BT 
AF CLOG, Matthieu
   AUBAUD, Cyril
   CARTIGNY, Pierre
   DOSSO, Laure
AS 1:1;2:1;3:1;4:2;
FF 1:;2:;3:;4:;
C1 Univ Paris 07, Inst Phys Globe, Lab Geochim Isotopes Stables, CNRS,UMR 7154,PRES Sorbonne Paris Cite, F-75005 Paris, France.
   IFREMER, CNRS, UMR 6538, F-29280 Plouzane, France.
C2 UNIV PARIS 07, FRANCE
   CNRS, FRANCE
IF 4.724
TC 51
UR https://archimer.ifremer.fr/doc/00169/28045/27274.pdf
LA English
DT Article
DE ;hydrogen isotopes;mantle geochemistry;mantle water
AB In this paper, we re-investigate the isotopic composition of hydrogen in MORB and the possible effects of contamination on delta D and water content. A suite of 40 N-MORB from the Pacific-Antarctic ridge, far from any hotspot, was analyzed for chlorine content by electron microprobe and for water content and delta D with silica tubes. Cl concentrations (from 29 to 2400 ppm) indicate widespread contamination, more intense with faster spreading rates, while water contents (from 840 to 7800 ppm) are mainly controlled by igneous processes. delta D values range from -76 to -48 parts per thousand, with an average value of -61 parts per thousand. The lack of correlation between Cl content and either H2O/Ce or SD indicate that contamination has a negligible effect on delta D for our samples, which is therefore characteristic of the mantle below the Pacific-Antarctic ridge. We suggest that the 20 parts per thousand lower delta D value reported for the North Pacific and North Atlantic is highly unlikely from geodynamical arguments. We propose that the convecting mantle is characterized by a delta D of -60+/-5 parts per thousand, as supported by the most recent data from North Atlantic N-MORB.
PY 2013
PD NOV
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier Science Bv
VL 381
UT 000327367800015
BP 156
EP 165
DI 10.1016/j.epsl.2013.08.043
ID 28045
ER

EF