2021
DOI: 10.20944/preprints202108.0231.v1
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Thermobarometry of Diamond Inclusions: Evidence Mantle Evolution beneath Siberian Craton and Archean Cratons Worldwide.

Abstract: Thermobarometric calculations for mineral inclusions in diamonds provide a systematic comparison of PTXFO2 conditions for different cratons worldwide, using a database of 4440 mineral EPMA analyses. Beneath all cratons, the cold branch of the mantle geotherm (35-32 mWm−2) relates to the sub-Ca garnets and rarely omphacitic diamond inclusions, referring to major continental growth events in Archean. High-temperature plume-related geotherms are common in Proterozoic kimberlites such as Premier, Mesozoi… Show more

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Cited by 2 publications
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“…3a, b). In the mobile belts: Limpopo, Magondi, Ural Ural, Khapchan belts and in the marginal parts of cratons like Kimberly Australia pyroxenitic and eclogitic pyroxenes and garnets prevail (Sobolev et al, 1976;Ashchepkov et al, 2021). The pyropes in the mobile belts are more Feand Ca-rich, in central parts of cratons, the peridotitic associations with sub-Ca pyropes prevail.…”
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confidence: 99%
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“…3a, b). In the mobile belts: Limpopo, Magondi, Ural Ural, Khapchan belts and in the marginal parts of cratons like Kimberly Australia pyroxenitic and eclogitic pyroxenes and garnets prevail (Sobolev et al, 1976;Ashchepkov et al, 2021). The pyropes in the mobile belts are more Feand Ca-rich, in central parts of cratons, the peridotitic associations with sub-Ca pyropes prevail.…”
mentioning
confidence: 99%
“…Thermobarometric calculations for mineral diamond inclusions and associations (DIA) provide a systematic comparison of PTXFO2 conditions for different cratons worldwide, using a database of 4440 mineral EPMA analyses (Ashchepkov et al, 2021). Comparison by minerals shows that the PT estimates for clinopyroxenes (Fig.…”
mentioning
confidence: 99%