期刊
ISLAND ARC
卷 9, 期 3, 页码 428-438出版社
WILEY
DOI: 10.1046/j.1440-1738.2000.00287.x
关键词
diamond; graphite; ultrahigh-pressure metamorphism
Characteristic features of in situ diamonds can be used to retrace diamond formation during ultrahigh pressure (UHP) metamorphism of the Kokchetav Massif, Kazakhstan. These features include the nitrogen aggregation state in diamond, dissolution features observed on diamond surfaces, and the carbon and nitrogen isotopic composition of the diamonds. The minerals in which the diamonds are included provide additional information and support the view that at least some of the Kokchetav microdiamonds are the products of prograde or peak UHP metamorphism. The coexistence of diamond and graphite is evaluated within this framework.
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