华南型块状硫化物矿床及其伴生铁矿床中的矿物共生顺序研究

MINERAL PARAGENESES IN THE SOUTH CHINA TYPE MASSIVE SULPHIDE AND ASSOCIATED IRON DEPOSITS

华南型块状硫化物矿床及其伴生铁矿床中最基本的共生顺序,Fe-S-As-O系矿物是胶黄铁矿→黄铁矿→磁黄铁矿→磁铁矿。Fe-Mg-Ca-Si-O系矿物是钙镁碳酸盐+石英+赤铁矿→铁镁钙硅酸盐+磁铁矿。这是从低温到高温的变质反应顺序。由此进一步佐证了本类矿床的沉积(火山沉积)-改造叠加成因。

Mineral parageneses in South China type massive sulphide and associated iron deposits are, melnikovite→pyrite→pyrrnotite→magnetite for the Fe-S-As-O system and calcium-magnesium carbonates + quartz + hematite→Iron-magnesium-calcium silicates + magnetite for the Fe-Mg-Ca-Si-O system. These are metamorphic reaction sequences and may help to elucidate these deposits as submarine sediments transformed by late stage events.