摘要
火山岩中玻璃基质或细粒基质在淬火条件下形成,其熔体结构受淬火温压和熔体成分所控制。在已知熔体成分的条件下,淬火温压可根据熔体结构来确定。对于玄武质熔浆有NBO/T=0.098 57+2.77×10^(-4)T+9.13×10^(-10)p;对于粗面安山质熔浆有:NBO/T=-0.465 5+9.10×10^(-4)T+1.14×10^(-9);对于英安质熔浆有:NBO/T=-0.512 3+8.10×10^(-4)T+1.2×10^(-9)p。
The glass or fine-grained matrix in volcanic rocks formed under quenching conditions, structure of melts in the matrix is controlled by quenching temperature, pressure and compositions of melts, At the given compositions of melts. the temperature and pressure are determined by structure of melts. For basalt melts, trachyandesite melts and dacite melts, the expressions are as follows NBO/T=0.098 57+2. 77×10^(-4)T+9. 13×10^(-10)p NBO/T=-0. 4655+9.10×10^(-4)T+1. 14×10^(-9)p and NBO/T=-0.5123+8.10×10^(-4)T+1. 20×10^(-9)p where T is ℃ p is Pa
出处
《矿物岩石》
CAS
CSCD
1992年第3期104-107,共4页
Mineralogy and Petrology
关键词
火山岩
淬火
温压计
olcanic rocks
quenched
thermobarometer
