摘要
近些年来，煌斑岩研究倍受地质学家重视，在诸如煌斑岩分类、成因及其与金矿关系等问题的研究上取得了很大的进展。从目前的资料来看，煌斑岩仍难以根据现有的准则分类，钾镁煌斑岩和金伯利岩最好能从煌斑岩中独立出来，Ｍｉｔｃｈｅｌｌ建议的“煌斑岩相”的概念比“煌斑岩族”更能体现煌斑岩的特征；而煌斑岩原始岩浆可能并不存在，煌斑岩是普遍类型的基性岩浆在源区或侵位过程中遭受地壳混染的衍生物；Ｒｏｃｋ等人提出的煌斑岩中温热液金矿成因模式存在明显的问题，因为煌斑岩高含量金多为次生富集的，煌斑岩与金矿伴生的主要原因是二者具相同的构造环境。
Recently, progresses have been made in lamprophyre study about its classification, genesis and relationship with gold deposits. On the basis of latest documents, it is difficult to classify lamprophyres unambiguously, meanwhile lamproites and kimberlites should be considered independently to lamprophyres. The term of“lamprophyre facies” proposed by Mitchell is better than“lamprophyre clan”. Perhaps there are no lamprophyre magmas, and lamprophyres derive from common basic magmas which are contaminated by the crust in their source or the process of emplacement. Rock's new hypothesis for mesothermal gold deposits has obvious shortcomings. The gold content of fresh lamprophyres is low, but that of altered ones is high for secondary enrichment. The connection between lamprophyres and gold deposits can be ascribed to the common tectonic environments during their formation.
出处
《世界地质》
CAS
CSCD
2001年第1期17-24,共8页
World Geology
