Isotopic fractionation of oxygen and carbon in decomposed lower-mantle inclusions in diamond
Abstract
Two carbonatitic mineral assemblages, calcite + wollastonite and calcite + monticellite, which are encapsulated in two diamond grains from the Rio Soriso basin in the Juina area, Mato Grosso State, Brazil, were studied utilizing the NanoSIMS technique. The assemblages were formed as the result of the decomposition of the lower-mantle assemblage calcite + CaSi-perovskite + volatile during the course of the diamond ascent under pressure conditions from 15 to less than 0.8 GPa. The oxygen and carbon isotopic compositions of the studied minerals are inhomogeneous. They fractionated during the process of the decomposition of primary minerals to very varying values: δ18O from –3.3 to +15.4 ‰ SMOW and δ13C from –2.8 to +9.3 ‰ VPDB. As a result, these values significantly extend the mantle values for these elements in both isotopically-light and isotopically-heavy areas.
- Authors:
-
- KM Diamond Exploration Ltd., West Vancouver, BC (Canada)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- GeoForschungsZentrum Potsdam, Potsdam (Germany)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1324510
- Report Number(s):
- LLNL-JRNL-701302
Journal ID: ISSN 0930-0708
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Mineralogy and Petrology
- Additional Journal Information:
- Journal Volume: 110; Journal Issue: 2-3; Journal ID: ISSN 0930-0708
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES
Citation Formats
Kaminsky, Felix, Matzel, Jennifer, Jacobsen, Ben, Hutcheon, Ian, and Wirth, Richard. Isotopic fractionation of oxygen and carbon in decomposed lower-mantle inclusions in diamond. United States: N. p., 2015.
Web. doi:10.1007/s00710-015-0401-7.
Kaminsky, Felix, Matzel, Jennifer, Jacobsen, Ben, Hutcheon, Ian, & Wirth, Richard. Isotopic fractionation of oxygen and carbon in decomposed lower-mantle inclusions in diamond. United States. https://doi.org/10.1007/s00710-015-0401-7
Kaminsky, Felix, Matzel, Jennifer, Jacobsen, Ben, Hutcheon, Ian, and Wirth, Richard. Sat .
"Isotopic fractionation of oxygen and carbon in decomposed lower-mantle inclusions in diamond". United States. https://doi.org/10.1007/s00710-015-0401-7. https://www.osti.gov/servlets/purl/1324510.
@article{osti_1324510,
title = {Isotopic fractionation of oxygen and carbon in decomposed lower-mantle inclusions in diamond},
author = {Kaminsky, Felix and Matzel, Jennifer and Jacobsen, Ben and Hutcheon, Ian and Wirth, Richard},
abstractNote = {Two carbonatitic mineral assemblages, calcite + wollastonite and calcite + monticellite, which are encapsulated in two diamond grains from the Rio Soriso basin in the Juina area, Mato Grosso State, Brazil, were studied utilizing the NanoSIMS technique. The assemblages were formed as the result of the decomposition of the lower-mantle assemblage calcite + CaSi-perovskite + volatile during the course of the diamond ascent under pressure conditions from 15 to less than 0.8 GPa. The oxygen and carbon isotopic compositions of the studied minerals are inhomogeneous. They fractionated during the process of the decomposition of primary minerals to very varying values: δ18O from –3.3 to +15.4 ‰ SMOW and δ13C from –2.8 to +9.3 ‰ VPDB. As a result, these values significantly extend the mantle values for these elements in both isotopically-light and isotopically-heavy areas.},
doi = {10.1007/s00710-015-0401-7},
journal = {Mineralogy and Petrology},
number = 2-3,
volume = 110,
place = {United States},
year = {Sat Jul 25 00:00:00 EDT 2015},
month = {Sat Jul 25 00:00:00 EDT 2015}
}
Web of Science
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