试谈我国东部沿海蓝宝石砂矿地质特征

宝石是重要的非金属矿产之-,本文对我国东部沿海地区新生代玄武岩区蓝宝石砂矿的矿床特征,成矿规律,及其与地质构造之间的关系进行探讨,为寻找宝石矿产提供了-些背景材料。

Geologic Features of Placer Oriental Sapphire Deposits in Eastern Coastal China

As one of the important and precious non-metallic minerals, placer oriental sapphire within basalt of Cenozoic in the eastern coastal China is disscused on its mineralization, geology of deposits and its relationship with geotectonics, in order to provide some messages of exploration. Distribution and the chemical composition of basalt are studied, morever, some potential mineral belts are put out. Occunence, mineral assemblage and principles of mineralization are discussed, similarities and differences in different regions are pointed out. Oriental sapphire, acorite in Hainan and Fujian and ciannamon garnet are analysed. It is revealed by the author that the forming of placer oriental sapphire is controlled by tectonic-magma and weathering. It worth to pay attention to the aluminium hupersaturated basalt, especially for the developed region of washed and drifted deposits.