安徽庐江巴家滩岩体岩浆结晶的物理化学条件及其研究意义  

PHYSICOCIIEMICAL CONDITION DURING MAGMATIC CRYSTALLIZATION OF BAJIATAN COMPLEX AND THEIR IMPLICATION IN LUJIANG, ANHUI

作　　者：任启江[1] 杨荣勇[1] 孙冶东 吴启志 王实 徐兆文 吴长年 邱检生 

机构地区：[1]南京大学地球科学系,南京210008

出　　处：《矿物岩石》1991年第3期48-55,共8页Mineralogy and Petrology

基　　金：国家自然科学基金

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.

关 键 词：造岩矿物 物理化学条件 安徽 岩体 

分 类 号：P583[天文地球—岩石学]