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selenium

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Journal Article
Journal: Geology
Published: 19 June 2020
Geology (2020) 48 (10): 1018–1022.
... ), would have been exploited. Selenium in the oceans did not rise significantly until 800 Ma. Sustained low levels of Se triggered the interplay between selenoprotein evolution and gene loss in prokaryotes (e.g., selenocysteine or Sec; cysteine or Cys). The Cys→Sec and Sec→Cys conversion events are more...
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Journal Article
Published: 01 May 2020
Russ. Geol. Geophys. (2020) 61 (5-6): 611–633.
.../files/2017_ geo_labs_brochure.pdf ). The concentrations of the major elements (as well as Cu, Ni, and Co) were obtained according to a standard XRF analysis. Gold, silver, selenium, and tellurium were determined by an ultra-trace ICP-MS method following an aqua regia digestion procedure...
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Journal Article
Published: 08 April 2020
The Canadian Mineralogist (2020) 58 (2): 203–221.
... microprobe analyses. The field of sulfide melt is extensive at 900 °C and retreats progressively towards the Cu–Se side at 750 °C; residual selenide melt persists at 600 °C. The selenium analogue of iss was found only at and below 600 °C; eskebornite becomes individualized at and below 500 °C, whereas...
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Journal Article
Published: 29 January 2020
Quarterly Journal of Engineering Geology and Hydrogeology (2020) 53 (3): 443–451.
... techniques result in improved selenium concentrations of discharge water as compared to conventional reclamation for valley-fills constructed of blasted rock. Comparisons investigated if groundwater and contaminant desorption could be improved by altering valley-fill construction. Three-dimensional finite...
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Journal Article
Journal: Economic Geology
Published: 01 January 2020
Economic Geology (2020) 115 (1): 101–128.
... metal sulfides. Canfieldite has Ag, Sn, and S contents that range from 59.7 to 69.4, 9.5 to 19.3, and 10.6 to 21.3 wt %, respectively ( Appendix Table A1 ). The selenium content varies from below the detection limit (0.01 wt %) to 11.6 wt % ( Zhai et al., 2019c ), and is heterogeneously distributed...
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Journal Article
Journal: Economic Geology
Published: 01 September 2019
Economic Geology (2019) 114 (6): 1135–1158.
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Journal Article
Published: 01 May 2019
Environmental and Engineering Geoscience (2019) 25 (2): 179–188.
..., iron, barium, chromium, arsenic, copper, manganese, nickel, selenium, lead, and zinc were determined for source partition and heavy metal pollution index (HMPI) assessment during both the spring and winter seasons. Four important dominant factors in the principal component analysis depicted, in toto...
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Journal Article
Journal: Economic Geology
Published: 01 March 2019
Economic Geology (2019) 114 (2): 201–206.
..., Brazil : Mineralogical Record , v. 23 , p. 471 – 474 . Cousins , C.A. , and Kinloch , E.D. , 1976 , Some observations on textures and inclusions in alluvial platinoids : Economic Geology , v. 71 , p. 1377 – 1398 . Cutter , G.A. , 1982 , Selenium in reducing waters...
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Journal Article
Published: 01 February 2019
American Mineralogist (2019) 104 (2): 190–206.
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Journal Article
Published: 08 October 2018
Mineralogical Magazine (2019) 83 (3): 419–426.
...Degao Zhai; Luca Bindi; Panagiotis C. Voudouris; Jiajun Liu; Stylianos F. Tombros; Kuan Li Abstract During a study of the ore minerals belonging to the recently discovered Shuangjianzishan Ag–Pb–Zn deposit in NE China, we have discovered exceptional selenium enrichment in canfieldite (up to 11.6 wt...
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Journal Article
Published: 21 August 2018
Quarterly Journal of Engineering Geology and Hydrogeology (2018) 51 (4): 503–508.
...John Parnell; Liam Bullock; Joseph Armstrong; Magali Perez Abstract The Bowland Shale Formation is anomalously rich in selenium (Se) at levels an order of magnitude greater than other black shales. The Mam Tor landslide, Derbyshire, England, offers an opportunity to measure whether the Se anomaly...
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Journal Article
Published: 01 June 2018
Mineralogical Magazine (2018) 82 (3): 697–724.
... 05 02 2018 Copyright © Mineralogical Society of Great Britain and Ireland 2018 2018 Mineralogical Society of Great Britain and Ireland mafic VMS selenium Troodos Ophiolite LA-ICP-MS sulfides Volcanogenic massive sulfide (VMS) deposits are important sources of base...
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Journal Article
Published: 01 June 2018
Mineralogical Magazine (2018) 82 (3): 649–674.
... Society of Great Britain and Ireland 2018 2018 Mineralogical Society of Great Britain and Ireland epithermal gold deposit Gaching ore occurrence AuSe Au(Te,Se,S) Au 2 Te 4 (Se,S) 3 unnamed phases Au oxide oxygen fugacity tellurium fugacity selenium fugacity sulfur fugacity...
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Journal Article
Published: 01 May 2018
Mineralogical Magazine (2018) 82 (S1): S5–S41.
...J. R. S. Carvalho; J. M. R. S. Relvas; A. M. M. Pinto; M. Frenzel; J. Krause; J. Gutzmer; N. Pacheco; R. Fonseca; S. Santos; P. Caetano; T. Reis; M. Gonçalves ABSTRACT High concentrations of indium (In) and selenium (Se) have been reported in the Neves-Corvo volcanic-hosted massive sulfide deposit...
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Journal Article
Published: 01 May 2018
Mineralogical Magazine (2018) 82 (S1): S61–S87.
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Journal Article
Journal: Economic Geology
Published: 01 May 2018
Economic Geology (2018) 113 (3): 675–698.
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Journal Article
Published: 06 April 2018
Geochemistry: Exploration, Environment, Analysis (2018) 18 (3): 229–240.
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Journal Article
Published: 31 March 2018
The Canadian Mineralogist (2018) 56 (2): 113–127.
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Journal Article
Published: 10 January 2018
Scottish Journal of Geology (2018) 54 (1): 37–49.
...Liam A. Bullock; John Parnell; Magali Perez; Adrian Boyce; Joerg Feldmann; Joseph G.T. Armstrong Abstract Carboniferous coals of the Ayrshire Coalfield are enriched in selenium (Se) relative to average UK and world compositions, substituting for sulphur in pyrite. Greenburn surface mine coals...
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Journal Article
Published: 01 August 2017
European Journal of Mineralogy (2017) 29 (4): 613–621.
...% laurite grains), followed by Os- and Ir-dominant alloys (i.e., the minerals osmium and iridium, respectively); unnamed phases of ruthenium selenide [RuSe 2 ] and rhodium telluride [RhTe] are rare. Selenium-rich laurite, not reported previously, likely belongs to an inferred RuS 2 –RuSe 2 series. Native Ru...