Petrochemical characteristics of kimberlites and identification of their diamond-bearing potentiality |
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| Authors: | Ruiyuan Zhong |
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| Institution: | 1. Central Laboratory, Geological Bureau of Liaoning Province, Liaoning, China
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| Abstract: | There has been found a distinct directional trend of kimberlites differing in ore-bearing potentiality with changing chemical composition. The contents of MgO, NiO and Cr2O3 decrease gradualy while Na2O, K2O, Al2O3 and P2O5 increase considerably in the order of diamond-rich—diamond-poor—diamond-barren kimberlites. In general Fe2O3, FeO and TiO2 also show an increasing tendency. Therefore, the variations in chemical composition may be used as petrochemical indexes for calculating the ore-bearing potentiality of kimberlites. Based on discriminant analysis, it is possible to make a distinction between diamond-bearing and diamond-barren, or between diamond-rich and diamond-poor kimberlites. |
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