Micron-scale variations in coupled δ13C-N abundance core-rim traverses in octahedral diamonds: insights into the processes and sources of episodic diamond formation beneath the Siberian craton

Autor: Wiggers de Vries, D.F., Bulanova, G., de Corte, K., Pearson, D.G., Davies, G.R.
Přispěvatelé: Geology and Geochemistry
Jazyk: angličtina
Rok vydání: 2013
Zdroj: Wiggers de Vries, D F, Bulanova, G, de Corte, K, Pearson, D G & Davies, G R 2013, ' Micron-scale variations in coupled δ13C-N abundance core-rim traverses in octahedral diamonds: insights into the processes and sources of episodic diamond formation beneath the Siberian craton ', Geochimica et Cosmochimica Acta, no. 100, pp. 176-199 . https://doi.org/10.1016/j.gca.2012.08.034
Geochimica et Cosmochimica Acta, 176-199. Elsevier Limited
ISSUE=100;STARTPAGE=176;ENDPAGE=199;ISSN=0016-7037;TITLE=Geochimica et Cosmochimica Acta
ISSN: 0016-7037
DOI: 10.1016/j.gca.2012.08.034
Popis: The internal structure and growth history of six macro-diamonds from kimberlite pipes in Yakutia (Russia) were investigated with cathodoluminescence imaging and coupled carbon isotope and nitrogen abundance analyses along detailed core to rim traverses. The diamonds are characterised by octahedral zonation with layer-by-layer growth. High spatial resolution SIMS profiles establish that there is no exchange of the carbon isotope composition across growth boundaries at the μm scale and that isotopic variations observed between (sub)zones within the diamonds are primary. The macro-diamonds have δ
Databáze: OpenAIRE
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