论金刚石原生矿勘查模型的“三组合”标志

A "THREE-IN-ONE" SIGN FOR PRIMARY DIAMOND MODELS

论述了金刚石原生矿勘查模型的“三组合”标志,即重砂法异常标志是出现次钙高铬镁铝榴石及高铬铬尖晶石矿物等;地球物理标志是与刚性围岩相比具有磁异常、低阻、高极化异常、重力低与放射性强度异常等;地球化学标志是具有Cr、Ni、Nb、La、Ce、Th等特征元素的综合异常。

A 'three-in-one' sign can be as the prospecting model for primary kimberlite. One aspect of the sign is anomalies of heavy placer minerals in which the pyrope with high Cr and low Ca occurs. Another one is geophysical indicator in which the magnetic anomalies, low resistivity anomalies, high polarizability anomalies, low gravity anomalies and high radioactivity anomalies exist compared with rigid adjacont rocks. Last one is geochemical indicator in which there are complex element anomalies of Cr, Ni, Nb, La, Ce and Th etc.