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germanium

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Journal Article
Published: 08 April 2020
The Canadian Mineralogist (2020) 58 (2): 191–201.
... and pearceite were differentiated by their chemistry. Although the presence of argyrodite in epithermal deposits with silver sulfosalts is relatively common, this first mention in Cerro Moro is highly encouraging for exploration for germanium, a critical element, which is also considered strategic by countries...
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Journal Article
Journal: Geology
Published: 17 December 2019
Geology (2020) 48 (3): 236–241.
..., this study shows that plastic deformation and subsequent syntectonic recrystallization of sphalerite (zinc sulfide, ZnS) led to the spatial redistribution of germanium (Ge): from a background level of a few hundreds of parts per million in undeformed primary sphalerite to tens of weight-percent...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 983–997.
... ). The behaviour of germanium and other minor elements during weathering of primary sulphides is poorly understood or even documented. While some minor metals are hosted in carbonates ( e.g ., cadmium; Schwartz, 2000 ), other mineral phases such as hydroxides and silicates are known to incorporate significant...
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Journal Article
Published: 01 March 2019
European Journal of Mineralogy (2019) 31 (2): 325–333.
...-rich sphalerite from the Tres Marias Zn–Pb–Ge deposit in Mexico and auriferous arsenopyrite from the Ashanti Au mine in Ghana are investigated. Sphalerite from Tres Marias contains Ge concentrations of up to 1430 μg/g and is characterised by elevated Fe contents. Germanium is homogeneously distributed...
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Journal Article
Published: 01 January 2019
Russ. Geol. Geophys. (2019) 60 (1): 86–96.
...V.I. Naidko; V.A. Makarov; D.G. Koz’min; A.F. Shimanskii; A.I. Fertikov Abstract — Integrated geological and geochemical studies were performed for lignite from the Yenisei middle reaches, represented by carbonized fragments of trees with high germanium contents. Geochemical characteristics...
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Journal Article
Published: 01 May 2018
Mineralogical Magazine (2018) 82 (S1): S89–S114.
..., goethite and hematite. Germanium occurs at ppm levels in W1 and W2, and in scarcely detectable amounts in hemimorphite, goethite and hematite. Indium has low concentrations in goethite and hematite. These different deportments among the various phases are probably due to the different initial Ga, In and Ge...
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Journal Article
Published: 01 May 2018
Mineralogical Magazine (2018) 82 (S1): S61–S87.
... of the fluids fluctuated during ore deposition suggesting different fluid pulses (system rejuvenation and/or boiling). The enrichment in Te, Se and Bi enrichment is supportive of a magmatic contribution to the ore fluid, while graphite in the metamorphic basement could be the source of germanium, although...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP435.2
EISBN: 9781786202901
... to be balanced by H. The ratio of Li/H-compensated Al centres seems to depend on the Li activity and the pH in the aqueous solution. Germanium concentrations in quartz cements are slightly higher than the crustal average and they show a weak correlation with Al. The excess of Ge in authigenic quartz requires pre...
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Journal Article
Published: 01 October 2017
Mineralogical Magazine (2017) 81 (5): 1151–1159.
..., Saxony, Germany; Höll et al. , 2007 ). The mineralogy and distribution of germanium at Capillitas is thus unique on a worldwide scale and represents a new mode of the occurrence of this rare metal in epithermal systems. In addition to the six mentioned Ge minerals, Ge contents up to 0.2 wt.% have been...
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 799–820.
... to avoid interference with the Ti K β 1 line. To measure the Ge contents in euclase, germanium metal was used as standard. Germanium was measured using the K α 1 line and a large lithium fluoride (LLiF) crystal, and positive and negative background offsets were estimated at 2200 and –1500, respectively...
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Journal Article
Journal: Geology
Published: 01 February 2017
Geology (2017) 45 (2): e407.
Journal Article
Journal: Geology
Published: 01 February 2017
Geology (2017) 45 (2): e408.
Journal Article
Published: 01 January 2017
Reviews in Mineralogy and Geochemistry (2017) 82 (1): 601–656.
...Olivier J. Rouxel; Béatrice Luais © 2017 Mineralogical Society of America 2017 Germanium (Ge) is a trace element in the Earth’s crust and natural waters, averaging about 1.6 ppm in rocks and minerals ( El Wardani 1957 ; Bernstein 1985 ) and 75 picomol/L in seawater ( Froelich...
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Journal Article
Published: 01 September 2016
The Canadian Mineralogist (2016) 54 (5): 1261–1284.
... deposition. Electron microprobe and LA-ICP-MS analyses reveal complex chemical zoning in the sphalerites together with coupling of two main groups of trace elements: copper, germanium, and gallium; and iron and cadmium. The zoning is interpreted in terms of substitution mechanisms using different equations...
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Series: Reviews in Economic Geology
Published: 01 January 2016
DOI: 10.5382/Rev.18.11
EISBN: 9781629490922
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Journal Article
Published: 01 November 2015
American Mineralogist (2015) 100 (11-12): 2533–2544.
... 10 2014 03 5 2015 © 2015 Mineralogical Society of America 2015 First-row transition elements (FRTEs) copper (Cu) gallium (Ga) germanium (Ge) mineral/melt partitioning melting peridotite pyroxenite MORB Variations of elemental and isotopic compositions in primitive...
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Journal Article
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2337–2343.
... germanium increases this distance, d , to the upper limit observed in both methods and decreases the stability in terms of enthalpy. This order of stability also corresponds to reactivity of hydroxo bridges to isotope exchange, as noted before ( Rustad et al. 2004 ). While all of the B3LYP results...
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Journal Article
Published: 01 January 2014
American Mineralogist (2014) 99 (1): 57–64.
... mineral germanium-tellurium sulfosalts Roşia Montana Apuseni Mountains Romania The Roşia Montana deposit has a long history of mining that started at least in Roman times. The deposit was known during the Roman period (106–273 AD) as Alburnus Maior ( Pošepný 1870 ; Sîntimbrean 1989...
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Journal Article
Published: 01 July 2013
Journal of Micropalaeontology (2013) 32 (2): 207–217.
... in Early Palaeozoic oceans . Geology , 29 : 755 – 758 . Tribovillard N. Bout-Roumazeilles V. Riboulleau A. Baudin F. Danelian T. Riquier L. 2011 . Transfer of germanium to marine sediments: insights from its accumulation in radiolarites and authigenic capture...
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Journal Article
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 848–858.
... exist to date: the “f-phase” in which Fe is fully octahedral and the “akdalaite-model” possessing 20% of the Fe atoms in tetrahedral coordination. In this study, germanium was used as a structural probe to re-examine the validity of the latter model. Germanium-bearing ferrihydrites containing 0.2, 0.6...
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