雷波拉咪乡南红玛瑙矿床地质特征及成因

Geological Features and Ore Genetic of the Nanhong Agate Deposit in Lami, Leibo

该文结合区域地质背景,分析和探讨了凉山州雷波拉咪乡南红玛瑙矿床地质特征及其矿物的放射性特征。结果表明,南红玛瑙赋存于飞仙关组二段砾石层中,晚二叠世至早三叠世区域地壳隆升,峨眉山玄武岩中的南红玛瑙由于风化剥蚀,经河流搬运、沉积及成岩,南红玛瑙以砾石的形式再次沉积于飞仙关组地层中,从而形成玛瑙矿床。放射性检测结果表明拉咪地区南红玛瑙的放射性比活度值均低于安全值,可用于日常贴身佩戴。

The Nanhong agate deposit in Lami, Leibo is found by 1：50,000 comprehensive investigation of regional geology and mineral resources in the Yanfeng-Tianba region. This paper makes an approach to geological features, radioactivity of agate and ore genesis of the agate deposit on the basis of regional geological and analytical data. The Nanhong agate occurs in pebble bed of the Second Member of the Triassic Feixianguan Formation, being weathering product of the Emeishan basalt. Radioactivity of the Nanhong agate is lower than safety value.