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The <span class="search-highlight">Ge</span>&#x2F;Si opal and δ <span class="search-highlight">74</span>&#x2F;70 <span class="search-highlight">Ge</span> opal record of samples from site ODP 1094, ...

The Ge/Si opal and δ 74/70 Ge opal record of samples from site ODP 1094, ...

Published: 01 January 2017
Figure 18 The Ge/Si opal and δ 74/70 Ge opal record of samples from site ODP 1094, as reported by Mantoura (2006) . Error bars are 95% confidence interval for the data estimated by 2× the standard error of n measurements. Age model data are from Mantoura (2006) and established by Schneider
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Rayleigh functions are fitted to whole (uncleaned) diatom δ <span class="search-highlight">74</span>&#x2F;70 <span class="search-highlight">Ge</span> data (...

Rayleigh functions are fitted to whole (uncleaned) diatom δ 74/70 Ge data (...

Published: 01 January 2017
Figure 15 Rayleigh functions are fitted to whole (uncleaned) diatom δ 74/70 Ge data (diamonds) and cleaned opal δ 74/70 Ge data (squares). The theoretical δ 74/70 Ge of the whole diatom cell is represented by the thinner dashed line, which is calculated using α = 0.9990. Ge isotope composition
Journal Article

Oberthürite, Rh 3 (Ni,Fe) 32 S 32 and torryweiserite, Rh 5 Ni 10 S 16 , two new platinum-group minerals from the Marathon deposit, Coldwell Complex, Ontario, Canada: Descriptions, crystal-chemical considerations, and comments on the geochemistry of rhodium

Andrew M. McDonald, Ingrid M. Kjarsgaard, Louis J. Cabri, Kirk C. Ross, Doreen E. Ames, Luca Bindi, David J. Good
Published: 13 December 2021
The Canadian Mineralogist (2021) 59 (6): 1833–1863.
DOI: https://doi.org/10.3749/canmin.2100014
... deposit, Coldwell Complex, Ontario, Canada. Oberthürite is cubic, space group , with a 10.066(5) Å, V 1019.9(1) Å 3 , Z = 1. The six strongest lines of the X-ray powder-diffraction pattern [ d in Å (I)( hkl )] are: 3.06(100)(311), 2.929(18)(222), 1.9518(39)(115,333), 1.7921(74)(440), 1.3184(15)(137,355...
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New Data on Hydrogeochemical and Isotopic Composition of Natural Waters of the Baidar Valley (Crimean Peninsula)

D.A. Novikov, Yu.G. Kopylova, A.V. Chernykh, F.F. Dultsev, A.N. Pyryaev, A.A. Khvashchevskaya, L.A. Nichkova, G.A. Sigora, T.A. Yakhin
Published: 01 December 2021
Russ. Geol. Geophys. (2021) 62 (12): 1401–1421.
DOI: https://doi.org/10.2113/RGG20204180
... composition follows the descending order: very strong, I 17 . 7 > Br 14. 4 ; strong, Se 2.83 > B 2. 22 > Sr 1.46 > Sb 1.12 > Be 1.07 > Hg 1.06 ; moderately strong, Zn 0. 74 > Mo 0.50 > Li 0.46 > Sc 0.41 > Ag 0.18 > As 0.16 > Si 0.123 > Ba 0.122 ; weak, Cr 0.10 > Cu...
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Experimental data of inter-diffusion isotopic fractionation of <span class="search-highlight">Ge</span> between t...

Experimental data of inter-diffusion isotopic fractionation of Ge between t...

Published: 01 January 2017
Figure 2 Experimental data of inter-diffusion isotopic fractionation of Ge between two GeO 2 synthetic silicate melts of contrasted initial 74 Ge/ 70 Ge ratios (low 74 Ge melt with 74 Ge/ 70 Ge = 1.6969 ± 0.0013, high 74 Ge melt with 74 Ge/ 70 Ge = 408.1 ± 3.0), but similar 76 Ge/ 70 Ge
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Modelling <span class="search-highlight">Ge</span> isotopic fractionation in sphalerite from St-Salvy using Rayle...

Modelling Ge isotopic fractionation in sphalerite from St-Salvy using Rayle...

Published: 01 January 2017
Figure 11 Modelling Ge isotopic fractionation in sphalerite from St-Salvy using Rayleigh laws for kinetic fractionation during sphalerite precipitation, ( Belissont et al. 2014 ), as a function of the fraction f of residual Ge in solution. (A) For given values of δ 74/70 Ge fluid = 1 and α
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Experimental determination of <span class="search-highlight">Ge</span> isotopic fractionation in coal and lignite...

Experimental determination of Ge isotopic fractionation in coal and lignite...

Published: 01 January 2017
Figure 3 Experimental determination of Ge isotopic fractionation in coal and lignite during ashing and combustion processes (Qi et al. 2010). (A) at low temperature of T = 600 °C: δ 74/70 Ge in ash and coal plot on ≈ 1.1 line (slope of 0.963, R 2 = 0.983), indicating no isotopic
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Modelling evaporation processes for <span class="search-highlight">Ge</span> isotopic compositions of IIE irons (...

Modelling evaporation processes for Ge isotopic compositions of IIE irons (...

Published: 01 January 2017
Figure 6 Modelling evaporation processes for Ge isotopic compositions of IIE irons (δ 74/70 Ge NIST3120a ) using Raleigh type fractionation (modified from Luais 2007 , 2012 ). The data can be modelled using β < 0.5 for the three germanium model compounds: Ge metal, GeO and GeS species
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<span class="search-highlight">Ge</span> isotope composition and <span class="search-highlight">Ge</span> concentration in seawater from North Pacific,...

Ge isotope composition and Ge concentration in seawater from North Pacific,...

Published: 01 January 2017
isotope composition of deep seawater (δ 74/70 Ge DSW ) is also reported, and is calculated using sample recovered below 300 m depth, corresponding typically to samples with Ge concentrations > 60 pM for the Pacific and Southern Ocean sectors. Data are from Guillermic et al. (2016) .
Journal Article

Germanium Isotope Geochemistry

Olivier J. Rouxel, Béatrice Luais
Published: 01 January 2017
Reviews in Mineralogy and Geochemistry (2017) 82 (1): 601–656.
DOI: https://doi.org/10.2138/rmg.2017.82.14
...Figure 18 The Ge/Si opal and δ 74/70 Ge opal record of samples from site ODP 1094, as reported by Mantoura (2006) . Error bars are 95% confidence interval for the data estimated by 2× the standard error of n measurements. Age model data are from Mantoura (2006) and established by Schneider...
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Germanium isotope and <span class="search-highlight">Ge</span>&#x2F;Si ratios of various mantle-derived rocks and deep...

Germanium isotope and Ge/Si ratios of various mantle-derived rocks and deep...

Published: 01 January 2017
Figure 13 Germanium isotope and Ge/Si ratios of various mantle-derived rocks and deep-sea clays defining a preliminary bulk crustal value (solid horizontal line). δ 74/70 Ge and Ge/Si values of glauconite (GL-O) other marine sediments and seawater are also shown for comparison. Data from Rouxel
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<span class="search-highlight">Ge</span> isotopic composition of terrestrial mantle derived rocks. Data are avera...

Ge isotopic composition of terrestrial mantle derived rocks. Data are avera...

Published: 01 January 2017
Figure 7 Ge isotopic composition of terrestrial mantle derived rocks. Data are average with 2 sigma error bars (s.d.) from Rouxel et al. (2006) , Qi et al. (2011) , Escoube et al. (2012) , Luais (2012) , Lalonde and Rouxel (unpublished, see Table 2 ). The average of δ 74/70 Ge NIST3120a
Journal Article

Topaz as an important host for Ge in granites and greisens

K. Breiter, N. Gardenová, T. Vaculovič, V. Kanický
Published: 01 June 2013
Mineralogical Magazine (2013) 77 (4): 403–417.
DOI: https://doi.org/10.1180/minmag.2013.077.4.01
... of 21 J cm −2 , a laser spot diameter of 65 μm and a repetition rate of 10 Hz. The following isotopes were measured: 27 Al, 28 Si, 45 Sc, 56 Fe, 69 Ga, 71 Ga, 72 Ge, 74 Ge, 115 In, 118 Sn and 205 Tl. Two isotopes for both Ga and Ge were measured to detect possible isobaric interferences...
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A schematic of the <span class="search-highlight">Ge</span>&#x2F;Si and <span class="search-highlight">Ge</span> isotope oceanic budget. The main sources of...

A schematic of the Ge/Si and Ge isotope oceanic budget. The main sources of...

Published: 01 January 2017
to maintain the current oceanic Ge/Si at 0.72 μMol/mol, 4.1 × 10 6 mol/yr must be sequestered in a nonopal sink (Froelich and King 1997). Germanium isotope compositions (reported as δ 74/70 Ge) of Ge sources and sinks are reported in Escoube et al. (2015) . Germanium isotope composition of the non-opal sink
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LA-ICP-MS data for Ga and <span class="search-highlight">Ge</span> concentrations in individual phases (mean valu...

LA-ICP-MS data for Ga and Ge concentrations in individual phases (mean valu...

Published: 10 November 2021
Table 5. LA-ICP-MS data for Ga and Ge concentrations in individual phases (mean values or ranges of means). Sample Phase N Ga (ppm) Ge (ppm) T17-2 Glass matrix 12 127–176 113–269 T17-2 Melilite 6 74 127 T17-2 Spinel and glass mixture 4 99 23 T18-2
Journal Article

Mineralogy of Ga- and Ge-bearing metallurgical slags from Tsumeb, Namibia

Vojtěch Ettler, Martin Mihaljevič, Ladislav Strnad, Radim Jedlicka, Bohdan Kříbek, Rob J. Bowell, Fred Kamona, Ben Mapani
Published: 10 November 2021
Mineralogical Magazine (2021) 85 (6): 879–889.
DOI: https://doi.org/10.1180/mgm.2021.83
...Table 5. LA-ICP-MS data for Ga and Ge concentrations in individual phases (mean values or ranges of means). Sample Phase N Ga (ppm) Ge (ppm) T17-2 Glass matrix 12 127–176 113–269 T17-2 Melilite 6 74 127 T17-2 Spinel and glass mixture 4 99 23 T18-2...
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Germanium Enrichment Mechanism: An Example from the Maoping Carbonate-Hosted Zn-Pb-(Ge) Deposit, SW China

Lei Wang, Yan Zhang, Runsheng Han
Published: 20 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (3): 549–567.
DOI: https://doi.org/10.3749/2200061
... Fe (5), 65 Cu (5), 66 Zn (5), 71 Ga (5), 74 Ge (5), 75 As (5), 107 Ag (5), 111 Cd (5), 115 In (5), 118 Sn (5), 121 Sb (5), 202 Hg (5), and 208 Pb (5) corresponding to a total dwell time of 75 ms. The MASS-1 sulfide standard ( Wilson et al . 2002 , Fe = 15.6%) was used as the primary...
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Distribution of trace elements in willemite from the Belgium non-sulphide deposits

Flavien Choulet, James Richard, Marie-Christine Boiron, Augustin Dekoninck, Johan Yans
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 983–997.
DOI: https://doi.org/10.1127/ejm/2019/0031-2871
... was used to estimate the d.l., minimum values of which are lower than 1 ppm for the trace elements analysed with an ablation spot diameter of 44 μm. The following isotopes were monitored to evaluate the Ge content: 70 Ge, 72 Ge, 73 Ge, 74 Ge, and 76 Ge. 70 Ge, 72 Ge and 76 Ge were not considered...
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Journal Article

Trace elements in Zn–Pb–Ag deposits and related stream sediments, Brooks Range Alaska, with implications for Tl as a pathfinder element

Garth E. Graham, Karen D. Kelley, John F. Slack, Alan E. Koenig
Published: 01 February 2009
Geochemistry: Exploration, Environment, Analysis (2009) 9 (1): 19–37.
DOI: https://doi.org/10.1144/1467-7873/08-177
... Cu <10 72 74 52 210 Fe 2 O 3 (%) 0.3 2.1 1.9 0.9 4.2 Ge <0.5 1.0 1.9 2.5 11 Mo <2 12 21 26 84 Ni 10 100 120 83 310 P 2 O 5 (%) 0.05 0.26 0.44 0.39 1.2 Pb <5 9 15 16 51 Sb 0.9 3.4 3.9 2.6 10 Tl 0.06 1.7 6.8 9.2 26 U...
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Germanium-rich nanoparticles in Cu-poor sphalerite: A new mechanism for Ge enrichment

Guotao Sun, Jia-xi Zhou, Alexandre Cugerone, Mei-fu Zhou, Lingli Zhou
Journal: GSA Bulletin
Published: 27 November 2023
GSA Bulletin (2023)
DOI: https://doi.org/10.1130/B37014.1
...Guotao Sun; Jia-xi Zhou; Alexandre Cugerone; Mei-fu Zhou; Lingli Zhou Germanium (Ge) is a critical raw material used in high-technology industry (i.e., optical industry) applications, and it is predominantly concentrated in coals and Zn-rich deposits. Previous studies on Zn-rich deposits have...
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