FN Archimer Export Format
PT J
TI An Intercomparison Study of the Germanium Isotope Composition of Geological Reference Materials
BT 
AF ESCOUBE, Raphalle
   ROUXEL, Olivier
   LUAIS, Beatrice
   PONZEVERA, Emmanuel
   DONARD, Olivier F. X.
AS 1:1,2;2:1,3,4;3:5;4:4;5:1;
FF 1:;2:PDG-REM-GM-LGM;3:;4:PDG-REM-GM-LGM;5:;
C1 LCABIE, U. Pau et Pays de l’Adour, CNRS UMR 525, Hélioparc 64053 Pau, France
   UEB-UBO, European Institute for Marine Studies IUEM, 29280 Plouzané, France
   Woods Hole Oceanog Inst, Marine Chem & Geochem Dept, Woods Hole, MA 02543 USA.
   IFREMER, Ctr Brest, DRO GM, F-29280 Plouzane, France.
   Nancy Univ, CRPG CNRS UPR 2300, F-54501 Vandoeuvre Les Nancy, France.
C2 UNIV PAU & PAYS ADOUR, FRANCE
   UBO, FRANCE
   WOODS HOLE, USA
   IFREMER, FRANCE
   UNIV NANCY, FRANCE
SI BREST
SE PDG-REM-GM-LGM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.77
TC 29
UR https://archimer.ifremer.fr/doc/00089/20036/21743.pdf
LA English
DT Article
DE ;germanium;isotope;intercalibration;reference materials;germanium;isotope;intercalibration;materiaux de reference
AB Recent analytical developments in germanium stable isotope determination by multicollector ICP-MS have provided new perspectives for the use of Ge isotopes as geochemical tracers. Here, we report the germanium isotope composition of the NIST SRM 3120a elemental reference solution that has been calibrated relative to internal isotopic standard solutions used in the previous studies. We also intercalibrate several geological reference materials as well as geological and meteoritic samples using different techniques, including online hydride generation and a spray chamber for sample introduction to MC-ICP-MS, and different approaches for mass bias corrections such as samplecalibrator bracketing, external mass bias correction using Ga isotopes and double-spike normalisation. All methods yielded relatively similar precisions at around 0.1 parts per thousand (2s) for d74/70Ge values. Using igneous and mantle-derived rocks, the bulk silicate Earth (BSE) d74/70Ge value was re-evaluated to be 0.59 +/- 0.18 parts per thousand (2s) relative to NIST SRM 3120a. Several sulfide samples were also analysed and yielded very negative values, down to -4.3 parts per thousand, consistent with recent theoretical study of Ge isotope fractionation. The strong heavy isotope depletion in ore deposits also contrasts with the generally positive Ge isotope values found in many modern and ancient marine sediments.
PY 2012
PD JUL
SO Geostandards And Geoanalytical Research
SN 1639-4488
PU Wiley-blackwell
VL 36
IS 2
UT 000306315600004
BP 149
EP 159
DI 10.1111/j.1751-908X.2011.00135.x
ID 20036
ER

EF