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Skip to Search Results- 3Harris, Jeff W.
- 3Pearson, D. Graham
- 3Stachel, Thomas
- 3Stern, Richard A.
- 2Lai, Mei Yan
- 1Burnham, Antony D.
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2023-01-01
Regier, Margo E., Smit, Karen V., Chalk, Thomas B., Stachel, Thomas, Stern, Richard A., Smith, Evan M., Foster, Gavin L., Bussweiler, Yannick, Debuhr, C., Burnham, Antony D., Harris, Jeff W., Pearson, D. Graham
Abstract Boron is a quintessential crustal element but its conspicuous presence in diamond – a mantle mineral – raises questions about potential subduction pathways for boron and other volatiles. It has been a long-standing goal to characterize the isotopic composition of boron in blue,...
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Formation of mixed paragenesis diamonds during multistage growth – constraints from in situ δ 13C–δ 15N–[N] analyses of Koidu diamonds
Download2022-01-01
Lai, Mei Yan, Stachel, Thomas, Stern, Richard A., Hardman, Matthew F., Pearson, D. Graham, Harris, Jeff W.
Abstract Inclusion-bearing diamonds from the Koidu kimberlite complex, Sierra Leone (West African Craton) were analyzed in situ for carbon and nitrogen isotope compositions, nitrogen concentrations and nitrogen aggregation states. In a suite of 105 diamonds, 78% contain eclogitic mineral...
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Nature of slab-mantle interactions recorded by coupled δ13C–δ15N–δ18O signatures and elemental compositions of Koidu diamonds and their inclusions
Download2023-01-01
Lai, Mei Yan, Stachel, Thomas, Stern, Richard A., Li, Kan, Pearson, D. Graham, Harris, Jeff W.
Abstract Eclogitic diamond formation can be associated with interactions between subducted slabs and ambient mantle. To gain a better understanding of the extent of chemical exchange between slabs and ambient mantle and the mechanisms of coeval diamond formation, we examined 16 diamonds with...