Corrigendum to “Plume-lithosphere interaction, and the formation of fibrous diamonds” by Broadley et al., 2018
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Corrigendum
Correction to: Geochemical Perspectives Letters 8, 26–30, doi: 10.7185/geochemlet.1825cor, published on 1 October 2018.
The authors regret that several typographic errors were included within Table S-2 in the Supplementary Information. This resulted in some of the concentrations being reported to the wrong order of magnitude. Furthermore, in Figure 2 there were one too many NBRS samples plotted, whilst sample NBCN-7 was absent from Figure 2 and Figure S-5.
We have corrected these errors and the correct versions of Figure 2, Figure S-5 and Table S-2 are shown below.

Figure 2 3He/4He vs. 4He concentrations from crushing and laser heating (open symbols) of Nyurbinskaya diamonds. 3He/4He from the cubic diamonds are higher than the cloudy and coated diamonds and plot above MORB values suggesting the diamond-hosted inclusions contain a mixture of lithospheric and deep mantle volatiles. Uncertainties shown are 1σ and for 4He concentrations are smaller than symbol size.

Figure S-5 3He/4He vs. 20Ne/22Ne for Nyurbinskaya diamonds. The diamonds show a relationship between He and Ne and trend from air towards the value of the Siberian flood basalts (Basu et al., 1995). There is potentially a third component present from the SCLM (having lower 3He/4He composition) that causes the mixing line to be shallower (R = 5) than generally expected for mixing between air and mantle alone (R = 100). Data for Udachnaya xenoliths are shown for reference indicating they contain a greater proportion of radiogenic 4He from the SCLM relative to the Nyurbinskaya diamonds (Sumino et al., 2006). Reference data for SCLM, MORB and OIB are from Gautheron and Moreira (2002); Graham (2002) and Stuart et al. (2003), respectively.
Table S-2 Helium and Neon concentration and isotopic ratios from crushing and laser extraction (italics) from the Nyurbinskaya diamonds. Diamond NBCB-9, was not successfully crushed and the complete diamond was analysed by laser extraction for noble gases. All uncertainties are reported to 1σ. n.d = not determined.
Sample | Mass (mg) | 4He cm3 STP/g | ± | 3He/4He RA | ± | 20Ne cm3 STP/g | ± | 20Ne/22Ne | ± | 21Ne/22Ne | ± | 40Ar/36Ar | ± |
NBCB-1 | 6.9 | 2.1 x 10-6 | 8.5 x 10-8 | 7.84 | 0.56 | 3.4 x 10-11 | 3.7 x 10-12 | n.d | n.d | n.d | n.d | 2755.7 | 198.1 |
4.3 | n.d | n.d | n.d | n.d | 1.6 x 10-10 | 4.7 x 10-13 | 10.04 | 0.04 | 0.0307 | 0.0014 | n.d | n.d | |
NBCB-4 | 3.8 | 1.6 x 10-5 | 6.9 x 10-7 | 10.5 | 0.69 | 1.3 x 10-11 | 6.4 x 10-11 | 10.43 | 0.14 | 0.0302 | 0.0011 | 862.5 | 61.8 |
NBCB-5 | 6 | 1.3 x 10-5 | 5.9 x 10-7 | 11.23 | 0.74 | 5.1 x 10-10 | 2.7 x 10-11 | 10.94 | 0.22 | 0.0368 | 0.0039 | 1956.9 | 122 |
NBCB-9 | 5 | n.d | n.d | n.d | n.d | 3.4 x 10-10 | 9.0 x 10-13 | 9.99 | 0.03 | 0.0288 | 0.0006 | n.d | n.d |
NBCB-7 | 5.8 | 2.3 x 10-6 | 1.2 x 10-7 | 9.95 | 0.77 | 3.6 x 10-10 | 1.9 x 10-11 | 10.76 | 0.37 | 0.0321 | 0.0032 | 352.1 | 25.2 |
NBRS-2 | 7.3 | 2.4 x 10-7 | 1.3 x 10-8 | 3.65 | 0.78 | 1.8 x 10-10 | 9.6 x 10-12 | 10.15 | 0.86 | 0.0288 | 0.0053 | 298.6 | 21.4 |
3.8 | 4.3 x 10-11 | 9.3 x 10-12 | 2.96 | 0.94 | n.d | n.d | n.d | n.d | n.d | n.d | n.d | n.d | |
NBRS-5 | 5.1 | 7.5 x 10-7 | 3.8 x 10-8 | 8.62 | 0.6 | 2.1 x 10-10 | 1.2 x 10-11 | 10.51 | 0.97 | 0.0294 | 0.007 | 437.6 | 31.4 |
3 | 3.9 x 10-9 | 7.7 x 10-11 | 2.78 | 0.95 | 3.2 x 10-11 | 1.1 x 10-13 | 10.16 | 0.04 | 0.0287 | 0.0013 | n.d | n.d | |
NBRS-8 | 7.1 | 1.7 x 10-6 | 7.2 x 10-8 | 4.72 | 0.56 | 1.7 x 10-10 | 1.1 x 10-11 | 9.86 | 1.06 | 0.0323 | 0.0077 | 461 | 24 |
4.5 | 9.8 x 10-10 | 3.2 x 10-11 | 5.62 | 0.37 | n.d | n.d | n.d | n.d | n.d | n.d | n.d | n.d | |
NBCT-11 | 6.3 | 4.0 x 10-7 | 2.1 x 10-8 | 7.21 | 0.9 | 5.8 x 10-11 | 3.8 x 10-12 | 9.36 | 1.69 | 0.0334 | 0.0139 | 339.1 | 24.2 |
3.4 | 3.9 x 10-9 | 3.1 x 10-11 | 6.18 | 0.22 | 4.0 x 10-11 | 1.4 x 10-13 | 10.02 | 0.03 | 0.0302 | 0.001 | n.d | n.d |
The text and interpretation of the manuscript are unaffected by these changes. We apologise for any inconvenience caused and thank Suzette Timmerman for bringing this issue to our attention.
Publisher's note: Figure 2 has been corrected in the online and PDF versions of the original article. Table S-2 and Figure S-5 have been corrected in the Supplementary Information PDF that accompanies the original article.