摘要
皖南中生代中酸性侵入岩中普遍含有黑云母,按其成分可分为:镁质黑云母、铁质黑云母和黑鳞云母3类,其MF值和∫O_2依次为0.56—0.60,0.42—0.46,0.06—0.13和10^(-12),10^(-14),10^(-18)左右。其寄主岩石的成因类型分别为扬子式同熔型、江南式同熔型和改造型。它们分别占据不同的地区,是不同大地构造单元上的产物。黑云母成分的变化是大地构造环境差异的标志。
Biotite is ubiquitous in the Mesozoic intermediate acidity intrusions from south Anhui province. According to their compositions, the biotite can be divided into three types: magnesian boitite, ferribiotite and Li-biotite. Their MF and fo_2 is 0.56-0. 60, 0.42—0.46, 0.06—0.13 and about 10^(-12), 10^(14), 10^(-18) in order. The genetic of their host rocks are Yangtze-syntectic type. Jiangnan-syntectic type and transformation type, respectively. They are distributed in different areas and are the product of different tectonic elements. The compositional variation of the biotities is a mark of the different are tectonic environment.
出处
《矿物岩石》
CAS
CSCD
1991年第1期29-36,共8页
Mineralogy and Petrology
关键词
中酸性
侵入岩
黑云母
类型
构造
biotite, intermediate-acidity intrusion, tectonic environment, south Anhui
