云南曼养铁矿成矿实验研究

本文在野外观察和室内岩矿工作的基础上,对云南曼养铁矿进行了成矿实验研究.结果表明,模拟实验体系钙铁辉石一钠长石一方铁矿十三氯化二硼（Hd-Ab-W（?）+B2O3）在1125℃存在一个较大的液相不混溶厂.对铁矿的原始岩浆、铁矿及富硅相的熔体自由能计算也证明了曼养铁矿原始熔状分相的可能性.本文的实验研究支持了曼养铁矿的矿浆成矿假说.

EXPERIMENTAL INVESTIGATION ON MINERALIZATION OF THE MANYANG IRON DEPOSIT IN YUNNAN

Manyang iron deposit ocurrs in the Upper Triassic spilite-keratophyre rock series of Indo-China foldbelt in Yunnan province, Southwestern China. Both the ore and the host rock are mainly composed of magnetite, albite, chlorite perhaps degraded from hedenbergite, and some accessory minerals, e.g. tourmaline, etc. They are rich in alkali, volatile, especially in B2O3, CO2.Under the microscope, the spherical iron ore droplet found in the spilitc thin section shows a sharp contact with the host part.