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Journal Article
Journal: Geology
Published: 07 September 2018
Geology (2018) 46 (10): 883-886.
...Lilianne Pagé; Keiko Hattori; Stéphane Guillot AbstractFluorine (50–650 ppm), bromine (0.03–0.3 ppm), iodine (0.03–0.4 ppm), boron (20–100 ppm) and nitrogen (5–45 ppm) concentrations are elevated in antigorite-serpentinites associated with the Tso Morari ultrahigh-pressure unit (Himalayas) exhumed...
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Journal Article
Published: 10 May 2018
Geochemistry: Exploration, Environment, Analysis (2018) 18 (4): 343-350.
...Angela Nigro; Giuseppe Sappa; Maurizio Barbieri AbstractBoron isotope composition was used to identify boron sources in groundwater in the eastern part of central Italy, on the west side of the lower alluvial plane of the Pescara river, a few kilometres from the coastline. This area...
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Journal Article
Published: 01 January 2018
European Journal of Mineralogy (2018) 30 (1): 177-182.
... the presence of boron, while X-ray powder patterns revealed the close relationship with axinite, which was considered one mineral at the time. This relationship led Milton et al. (1953) to assume Mn as divalent, and consequently, they proposed the formula H(Ca,Mn,Fe,Mg) 3 Al 2 BSi 4 O 16 for axinite...
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Journal Article
Published: 01 October 2017
American Mineralogist (2017) 102 (10): 2136-2141.
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Journal Article
Published: 01 October 2017
Mineralogical Magazine (2017) 81 (5): 1165-1189.
...M. Lacalamita; G. Balassone; E. Schingaro; E. Mesto; A. Mormone; M. Piochi; G. Ventruti; M. Joachimski AbstractFluorine-, boron- and magnesium-rich metamorphosed xenoliths occur in the Campanian Ignimbrite deposits at Fiano (southern Italy), at ∼50 km northeast of the sourced volcanic area...
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Journal Article
Journal: Elements
Published: 01 August 2017
Elements (2017) 13 (4): 249-254.
...Cahit Helvacı; Martin R. Palmer Naturally occurring borates are the major economic source of boron. Borates were first used over 4,000 years ago in precious-metal working and are now essential components of modern industry. Although borates have been exploited from other sources, three minerals...
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Journal Article
Journal: Economic Geology
Published: 01 August 2017
Economic Geology (2017) 112 (5): 1269-1272.
Journal Article
Journal: Economic Geology
Published: 01 August 2017
Economic Geology (2017) 112 (5): 1273-1277.
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 561-593.
... emerald occurrences related to S-type granitic magmatism. Boron is a common element of magmatic origin in W skarns and a granitic fluid is likely the source of B at Lened ( Newberry 1998 ). Alternatively, the B could have been sourced from local mudstone (B = 240 ppm), although it is likely...
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 669-699.
... with a marine boron source. The oxygen isotope composition of corundum (δ18OVSMOW = 16.4 ± 0.1‰) is comparable to that of corundum in marble or desilicated pegmatite associated with marble. Phlogopite and muscovite 40Ar/39Ar ages and calculated closure temperatures (considered estimates) are ca. 1640 Ma (Tc...
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Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 239-255.
... with the dissolution of jeremejevite will produce scattered or inverse boron isotope patterns (heavy cores, light rims) in tourmaline, which cannot result from simple Rayleigh fractionation. Similar reactions involving jeremejevite or other precursor phases might explain chemical zonation and porous textures...
Series: Geological Society
Published: 01 January 2017
DOI: 10.1144/SP448.13
EISBN: 9781786202932
... of the Torridonian Supergroup. The range of sedimentary structures and the boron content of illite led us to the overall conclusion that, based on the currently available evidence, the Torridonian Supergroup was probably entirely non-marine. Evidence for terrestrial life in these rocks comes from microbially induced...
Journal Article
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (5): 931-941.
... with the hydrogarnet end-member katoite, Ca 3 Al 2 (OH) 12 ( Passaglia & Rinaldi, 1984 ). The incorporation of boron (0.2–4.8 wt% B 2 O 3 ) into the vesuvianite structure ( Groat et al ., 1994 ) according to the scheme B + Mg ↔ 2H + Al leads to the appearance of two additional T 1 and T 2 positions. Groat et...
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Journal Article
Published: 01 November 2016
The Canadian Mineralogist (2016) 54 (6): 1525-1537.
... substitution of Al for Si, also at Z2. Beryllium and B are at T1, between the edge-sharing trimers Y3Y2Y3, as is the case for B in the boron-dominant vesuvianite species wiluite. The total content at T1 is interpreted as 0.82Be, 0.34B, and 0.037Fe3+. Vesuvianite is one of the most chemically and structurally...
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Journal Article