Diamonds in an Upper Mantle Peridotite Nodule from Kimberlite in Southern Wyoming

Diamonds in a serpentinized garnet peridotite nodule from a diatreme in southern Wyoming are the first known occurrence in an upper mantle peridotite xenolith from a kimberlite intrusion in North America as well as the second authenticated occurrence of diamonds from kimberlite pipes in North Americ...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1976-04, Vol.192 (4236), p.253-256
Main Authors: McCallum, M. E., Eggler, David H.
Format: Article
Language:English
Subjects:
Crystals
Garnets
Insect larvae
Minerals
Nodules
Olivine
Peridotite
Spinel
Surface texture
Upper mantle
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Summary:Diamonds in a serpentinized garnet peridotite nodule from a diatreme in southern Wyoming are the first known occurrence in an upper mantle peridotite xenolith from a kimberlite intrusion in North America as well as the second authenticated occurrence of diamonds from kimberlite pipes in North America. The nodule is believed to have come from a section of depleted (partially melted) lherzolite at a depth of 130 to 180 kilometers.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.192.4236.253