Skip to Main content Skip to Navigation
Journal articles

Sulphur isotope heterogeneity in the mantle from ion microprobe measurements of sulphide inclusions in diamonds

Abstract : The sulphur isotope composition of the mantle has been generally considered to be 0±2‰. There is, however, considerable uncertainty in the mean δ34S value of the mantle and in its range because there have been very few analyses of unaltered sulphide phases of direct mantle origin and δ34S values of sulphides from large mafic intrusions range from –9 to +17‰. We report here ion microprobe δ34S determinations from two mantle derived sulphide inclusions (≈100 µm) preserved in a diamond (δ13C = –4.25‰) of peridotitic(?) paragenesis from Premier (South Africa) and in four diamonds of eclogitic paragenesis from Orapa (Botswana). Three octahedral sulphides have lower δ34S values (+2.3±1.4‰) than three platelet-like sulphides (+8.2±0.9‰). This evidence for mantle heterogeneity for sulphur is interpreted in terms of recycling of crustal material into the eclogitic region of diamond growth in the mantle.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-02532017
Contributor : Marc Chaussidon <>
Submitted on : Saturday, April 4, 2020 - 11:22:33 AM
Last modification on : Monday, March 15, 2021 - 10:56:04 AM

Links full text

Identifiers

Collections

Citation

Marc Chaussidon, F. Albarède, S. Sheppard. Sulphur isotope heterogeneity in the mantle from ion microprobe measurements of sulphide inclusions in diamonds. Nature, Nature Publishing Group, 1987, 330 (6145), pp.242-244. ⟨10.1038/330242a0⟩. ⟨hal-02532017⟩

Share

Metrics

Record views

57