Carbon and oxygen isotope variations in diamond and graphite eclogites from Orapa, Botswana, and the nitrogen content of their diamonds

In eclogite xenoliths from Orapa, Botswana, δ 13C of graphite varies between −4.6 and −7.8%. vs. PDB, while that of diamonds ranges from −4.0 to −22.3%.. In graphite eclogites, δ 18O values of garnets fall between 5.2 and 7%. vs. SMOW and those of clinopyroxenes between 4.6 and 6.5%.. For diamond ec...

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Veröffentlicht in:	Geochimica et cosmochimica acta 1991-02, Vol.55 (2), p.515-524
Hauptverfasser:	Deines, Peter, Harris, J.W., Robinson, D.N., Gurney, J.J., Shee, S.R.
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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