摘要
对巴家滩杂岩体造岩矿物的研究和岩石的熔融实验,确定岩浆结晶温度区间为775—920℃,压力为p=50MPa。岩浆体系具有较低的fH_2O和较高的fO_2,其T-fO_2变异曲线不同于宁芜玢岩铁矿的母岩浆,对铁质在岩浆演化过程中的富集不利,但有利于贱金属硫化物矿床的形成。
On the basis of studies on rock—forming minerals and melting experiments with rocks of Bajiatan complex, the physicochemical conditions during magmatic crystallization have been determineted: T=775—920℃, P=50MPa, with a high fo_2 and a low fH_2O. The plot of fo_2-Tis different from the magma system related to porphyry iron deposits in Nanjing—Wubu basin, which is not benificial to the concentration of iron component during magma differentiation, but it is belpful to the formation of heary—metal sulfide deposits.
出处
《矿物岩石》
CAS
CSCD
1991年第3期48-55,共8页
Mineralogy and Petrology
基金
国家自然科学基金
关键词
造岩矿物
物理化学条件
安徽
岩体
rock-forming minerals, physicochemical condition, iron and heavy metal sulfide deposits
