Reference Minerals for the Microanalysis of Light Elements

Dyar, M. D.; Wiedenbeck, Michael; Robertson, Douglas D.; Cross, Laura R.; Delaney, J. S.; Ferguson, Kurt M.; Francis, Carl A.; Grew, Edward S.; Guidotti, Charles V.; Hervig, R. L.; Hughes, John M.; Husler, John; Leeman, William P.; McGuire, Anne V.; Rhede, Dieter; Rothe, Heike; Paul, Rick L.; Richards, I. J.; Yates, Martin G.

doi:10.1111/j.1751-908x.2001.tb00616.x

Cited by 166 publications

(86 citation statements)

References 51 publications

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“…8 It should also be noted that the B4 sample was the only multi-grain material used in this study, whereas the other three samples from Dyar et al 28 were fragments from single large tourmaline crystals.…”

Section: Relative Merits Of Laser Ablation MC Icp-ms and Simsmentioning

confidence: 99%

“…Table 1) and it grossly coincides with the reported repeatability of the in situ techniques used for their characterization. 8,16,[28][29][30] All samples were mounted in epoxy resin and polished to obtain at and smooth surfaces suitable for electron probe micro-analysis (EPMA), SIMS, and LA MC ICP-MS analysis. Tourmaline grains were split into two sample mounts.…”

Section: Tourmaline Samplesmentioning

confidence: 99%

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Matrix effects during laser ablation MC ICP-MS analysis of boron isotopes in tourmaline

Míková

Košler

Wiedenbeck

2014

J. Anal. At. Spectrom.

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Laser ablation multi-collector inductively coupled plasma mass spectrometry (LA MC ICP-MS) and secondary ion mass spectrometry (SIMS) were used to determine the boron isotopic compositions of several natural tourmaline group minerals (elbaite, schorl and dravite). This study reports on the effects of instrument parameters of LA MC ICP-MS and the composition of sample matrix on data accuracy, reproducibility and repeatability. We demonstrate that the tourmaline matrix has a significant effect on the obtained d11 B values and impacts on data accuracy, with a bias of up to ca. 2.5& if a non matrixmatched reference material is used to calibrate the measurements. In the case of a matrix-matched calibration, the boron isotopic data obtained by LA MC ICP-MS are comparable to the reference TIMS values, with typical repeatability for d 11B results between 0.2 and 0.5& (1s). This is somewhat better compared to the repeatability of 0.8-1.3& (1s) for small format single collector SIMS.

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Section: Relative Merits Of Laser Ablation MC Icp-ms and Simsmentioning

confidence: 99%

Section: Tourmaline Samplesmentioning

confidence: 99%

Matrix effects during laser ablation MC ICP-MS analysis of boron isotopes in tourmaline

Míková

Košler

Wiedenbeck

2014

J. Anal. At. Spectrom.

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“…A single analysis consisted of 20 scans of the peak stepping sequence 0.95 background (0.1 s), 1 H (2 s), 7 Li (4 s), 11 B (2 s) and 30 Si (4 s), resulting in a total analysis time of 11 minutes. Instrument calibration employed the same three tourmaline reference materials from Dyar et al (2001).…”

Section: Geologic Settingmentioning

confidence: 99%

Chemical and boron-isotope variations in tourmalines from an S-type granite and its source rocks: the Erongo granite and tourmalinites in the Damara Belt, Namibia

Trumbull

Krienitz

Gottesmann

et al. 2007

Contrib Mineral Petrol

129

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Tourmaline is widespread in metapelites and pegmatites from the Neoproterozoic Damara Belt, which form the basement and potential source rocks of the Cretaceous Erongo granite. This study traces the B-isotope variations in tourmalines from the basement, from the Erongo granite and from its hydrothermal stage. Tourmalines from the basement are alkali-deficient schorl-dravites, with Bisotope ratios typical for continental crust (δ 11 B average -8.4‰ ±1.4, n=11; one sample at -13‰, n=2).Virtually all tourmaline in the Erongo granite occurs in distinctive tourmaline-quartz orbicules. This "main-stage" tourmaline is alkali-deficient schorl (20-30% X-site vacancy, Fe/(Fe+Mg) 0.8 to 1), with uniform B-isotope compositions (δ 11 B -8.7‰ ±1.5, n=49) that are indistinguishable from the basement average, suggesting that boron was derived from anatexis of the local basement rocks with no significant shift in isotopic composition. Secondary, hydrothermal tourmaline in the granite has a bimodal B-isotope distribution with one peak at about -9‰, like the main-stage tourmaline and a second at -2‰. We propose that the tourmaline-rich orbicules formed late in the crystallization history from an immiscible Na-B-Fe-rich hydrous melt. The massive precipitation of orbicular tourmaline nearly exhausted the melt in boron and the shift of δ 11 B to -2‰ in secondary tourmaline can be explained by Rayleigh fractionation after about 90% B-depletion in the residual fluid.2

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“…The relative ion yield (RIY) for B and H was determined using three tourmaline crystals as reference materials (Dyar et al 1998(Dyar et al , 2001. For Li, the standard glass SRM610 (NIST) was used as a reference material; concentrations (preferred averages) for Li and Be were taken from Pearce et al (1997).…”

Section: Chemical Analysesmentioning

confidence: 99%

STRUCTURAL AND CHEMICAL INVESTIGATION OF A ZONED SYNTHETIC Cu-RICH TOURMALINE

et al. 2015

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A synthetic Cu-rich tourmaline crystal (Lebedev et al. 1988) consists of three different zones. Each zone was characterized by EMPA, SIMS, and single-crystal structure refinement (SREF). The first zone (which crystallized directly on the seed crystal) has the formula~X(Na 0. (1), c 7.087(1) Å (R = 2.5%). While [4] Al decreases from zone 1 to zone 3, [4] B increases (by chemistry and SREF), which could be explained by a decreasing temperature during tourmaline crystallization. Such a T-site occupancy is in agreement with the distance, which strictly monotonically decreases from 1.625(1) to 1.616(1) Å. We suggest that very small amounts of Cu are present at the Z site of all investigated tourmaline samples, but only in the Cu-richest zone (~14 wt.% CuO) is the refined value for Cu at the Z site (~1% of the total Cu) higher than the 3σ error. The YO 6 octahedron of this Cu-richest known tourmaline is mainly occupied by Cu. Two of the six (Cu,Al)-O distances are significantly enlarged: Y-O1 with 2.031(2) Å and Y-O3 with 2.170(2) Å, while the other distances Y-O2 and Y-O6 with~1.951(2) Å are significantly smaller. The proportion of the average of the two enlarged distances to the average of the other distances in the Cu-richest zone gives a value of~1.08, which is the highest value known so far for Cu-bearing tourmalines. We conclude that for the Cu-richest zone the Jahn-Teller effect appears to be verified.

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Reference Minerals for the Microanalysis of Light Elements

Cited by 166 publications

References 51 publications

Matrix effects during laser ablation MC ICP-MS analysis of boron isotopes in tourmaline

Matrix effects during laser ablation MC ICP-MS analysis of boron isotopes in tourmaline

Chemical and boron-isotope variations in tourmalines from an S-type granite and its source rocks: the Erongo granite and tourmalinites in the Damara Belt, Namibia

STRUCTURAL AND CHEMICAL INVESTIGATION OF A ZONED SYNTHETIC Cu-RICH TOURMALINE

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