Maya Kamenetsky

New Identity of the Kimberlite Melt

Constraints from Unaltered Diamondiferous Udachnaya-East Pipe Kimberlite, Siberia, Russia

• Broschiertes Buch

Produktbeschreibung

This study presents detailed petrographic, mineralogical, chemical, and isotope data on exceptionally fresh kimberlite samples from the diamondiferous Udachnaya-East pipe (Daldyn-Alakit region, Siberia). I demonstrate that the Udachnaya-East rocks have radiogenic isotopic compositions, petrographic features and major and trace element geochemistry typical of group-I kimberlites. However, unlike common kimberlites, the studied samples show no primary or secondary serpentine, and thus are essentially anhydrous (< 0.5 wt% H2O), but CO2-rich (10-11 wt%). In contrast with other kimberlites worldwide, the Udachnaya-East samples are uniquely enriched in chlorine and alkalies (2.3-3.2 wt% Cl, 2.6-3.7 wt% Na, and 1.6-2.0 wt% K). I propose that significant amounts of alkali chlorides and carbonates in the Udachnaya-East kimberlite are pristine magmatic components inherited from the kimberlite parental/primary magma. This enrichment may be responsible for the kimberlite low liquidus temperatures, low viscosities, and rapid ascent.

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Produktdetails

• Verlag: Scholars' Press
• Seitenzahl: 376
• Erscheinungstermin: 13. September 2013
• Englisch
• Abmessung: 220mm x 150mm x 23mm
• Gewicht: 578g
• ISBN-13: 9783639518399
• ISBN-10: 363951839X
• Artikelnr.: 62749544

Autorenporträt

Dr. Maya Kamenetsky graduated from the Moscow State University in 1984 and received her PhD in the University of Tasmania in 2006. She has wide experience and skills in melt inclusion technique and high-temperature experiments, different analytical methods (Raman spectroscopy, Laser Ablation ICPMS, microprobe analysis) and data processing