Secondary melt inclusions in olivine from unaltered kimberlites of the Udachnaya-East Pipe, Yakutia
Secondary melt inclusions in olivine from unaltered kimberlites of the Udachnaya-East Pipe, Yakutia
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DOI：
10.29173/ikc3141
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发表时间：
2003
影响因子：
0.9
通讯作者：
A. Golovin;V. Sharygin;N. Pokhilenko;V. Malkovets;B. Kolesov;N. Sobolev
中科院分区：
文献类型：
--
作者：
A. Golovin;V. Sharygin;N. Pokhilenko;V. Malkovets;B. Kolesov;N. Sobolev
在位于雅库特金伯利岩省Daldyn-Alakit地区的Udachnaya-东部金伯利岩管的中部，在350-650米深处发现了独特的（高度保存的）金伯利岩，其中含有丰富的橄榄石，没有经过蛇纹化。这种金伯利岩可以被认为是保留了深层熔体的所有特征的原生岩石（Marshintsev等人，1976年）。该金伯利岩的化学成分如下（重量%）：SiO2 29.8，TiO 2 1.55，Al 2 O3 2.45，FeOtot 8.50，MnO 0.16，MgO 32.0，CaO 10.8，Na 2 O 0.30，K2 O 0.8; P2 O 5 0.40，CO2 6.90，总计93.66。将这一成分与各种雅库特金伯利岩的数据进行比较，包括来自Udachnaya和Mir管道的富含钻石的岩石（Sobolev等人，1986年）证实了未改变的金伯利岩的独特性质。
In the central part of the Udachnaya-Eastern kimberlite pipe situated in the Daldyn-Alakit field of the Yakutian kimberlite province, unique (in high degree of its preservation) kimberlitic rock with abundant olivine, which did not undergo serpentinization, was found at a depth of 350-650 m. This kimberlite can be considered as a primary rock that retained all features of the deepseated melt (Marshintsev et al., 1976). The chemical composition of this kimberlite is as follows (wt %): SiO2 29.8, TiO2 1.55, Al2O3 2.45, FeOtot 8.50, MnO 0.16, MgO 32.0, CaO 10.8, Na2O 0.30, K2O 0.8; P2O5 0.40, CO2 6.90, total 93.66. The comparison of this composition with data for various Yakutian kimberlites, including diamond-rich rocks from the Udachnaya and Mir pipes (Sobolev et al., 1986) confirms the unique character of the unaltered kimberlite.