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石榴石和铬尖晶石是金刚石的重要指示矿物,它们在金伯利岩和钾镁煌斑岩中分布较广泛.国内外各金刚石原生矿产地,大都是采用重砂法,运用金刚石指示矿物发现的.湖南金刚石包裹体达20余种,橄榄岩型(P型)和榴辉岩型(E型)包裹体矿物组合各占50%,还在数颗金刚石中发现有(P+E型)混合型包裹体矿物组合,它的发现具有重要的意义.根据湖南金刚石指示矿物表面结构特征的研究,在湖南宁乡云影窝地区成功地发现了微含金刚石钾镁煌斑岩管脉群.湖南已发现金刚石指示矿物异常区(点)数十处,为今后部署湖南金刚石原生矿勘查工作提供了重要信息.
Garnet and chrome spinel are important diamond-bearing minerals, and they are widely distributed in kimberlite and pegmatite-rich porphyry.Domestic and foreign primary diamond deposits are mostly found by heavy sand method and diamond-indicating minerals. There are more than 20 kinds of diamond inclusions in Hunan, with 50% each of the peridotite type (P type) and eclogite type (E type) inclusions. In addition, several (P + E) mixed types Based on the study of the surface structure of diamond-indicating minerals in Hunan province, we successfully discovered the microporous diamond-lamprophyroid lamprophyre groups in Yunyingwo area, Hunan province. It is found that there are dozens of anomalous zones (spots) of diamond indicating mineral, which provide important information for the future deployment of primary diamond exploration in Hunan.