TY - JOUR
T1 - Remobilization in the cratonic lithosphere recorded in polycrystalline diamond
AU - Jacob, D. E.
AU - Viljoen, K. S.
AU - Grassineau, N.
AU - Jagoutz, E.
PY - 2000/8/18
Y1 - 2000/8/18
N2 - Polycrystalline diamonds (framesites) from the Venetia kimberlite in South Africa contain silicate minerals whose isotopic and trace element characteristics document remobilization of older carbon and silicate components to form the framesites shortly before kimberlite eruption. Chemical variations within the garnets correlate with carbon isotopes in the diamonds, indicating contemporaneous formation. Trace element, radiogenic, and stable isotope variations can be explained by the interaction of eclogites with a carbonatitic melt, derived by remobilization of material that had been stored for a considerable time in the lithosphere. These results indicate more recent formation of diamonds from older materials within the cratonic lithosphere.
AB - Polycrystalline diamonds (framesites) from the Venetia kimberlite in South Africa contain silicate minerals whose isotopic and trace element characteristics document remobilization of older carbon and silicate components to form the framesites shortly before kimberlite eruption. Chemical variations within the garnets correlate with carbon isotopes in the diamonds, indicating contemporaneous formation. Trace element, radiogenic, and stable isotope variations can be explained by the interaction of eclogites with a carbonatitic melt, derived by remobilization of material that had been stored for a considerable time in the lithosphere. These results indicate more recent formation of diamonds from older materials within the cratonic lithosphere.
UR - http://www.scopus.com/inward/record.url?scp=0034682895&partnerID=8YFLogxK
U2 - 10.1126/science.289.5482.1182
DO - 10.1126/science.289.5482.1182
M3 - Article
C2 - 10947983
AN - SCOPUS:0034682895
VL - 289
SP - 1182
EP - 1185
JO - Science (New York, N.Y.)
JF - Science (New York, N.Y.)
SN - 0036-8075
IS - 5482
ER -