台湾海峡沉积物中海绿石的矿物学与分布特征

Mineralogical and distributive characteristics of glauconite in sediment in Taiwan Strait

本文研究台湾海峡表层沉积物中海绿石的矿物学特征、分布格局及富集的沉积环境。结果表明，海峡海绿石系高硅富铁的含水硅酸盐矿物，为二八面体向三八面体过渡型结构类型，具有现代海绿石性质。海峡东北部、中部主要分布黑色颗粒状海绿石，南部为灰绿色生物状海绿石。均富集于晚更新世“残留沉积”的贝壳砂中，处于弱化环境，底层流比较活跃。

This paper expounds the physics nature, heat property, chemical composition, distribution and enrichmental environment of glauconite in the sediment in Taiwan Strait. The results show that the glauconites are hydrosilicate minerals containing high silicon and iron.Their structures are mica mold of transitional type from dioctahedron to trisoctahedron. They have modern property. The black graine-shaped glauconites distribute in the northeast of Taiwan Strait and the grey and green organism-shaped glauconites in the south of Taiwan Strait. They both are enriched in the shell sands of Late Pleistocene relict sediment.