Experimental study on crystallization kinetics of alkali feldspar under high T-P conditions  

作　　者：LI Fuchun ZHU Jinchu RAO Bing LAI Mingyuan JIN Zhangdong 

机构地区：[1]Department of Earth Sciences and State Key Laboratory for Research of Mineral Deposits,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Science Bulletin》2000年第22期2096-2100,共5页

摘　　要：In the granite-NaF-H2O system, there exists a nucleation lag in the course of alkali feldspar crystallization indicated by experiments on crystallization kinetics. The nucleation lag time is about 18 h at 700℃ and about 6 h at 650℃.nucleation rate and crystal-growth rate of alkali feldspar are not constant during the crystallization process, but vary with crystallization time. Here we suggest that the lag time should be taken into account in the calculation formula of nucleation rate and crystal-growth rate to obtain more reliable parameters.In the granite-NaF-H2O system, there exists a nucleation lag in the course of alkali feldspar crystallization indicated by experiments on crystallization kinetics. The nucleation lag time is about 18 h at 700°C and about 6 h at 650°C. Meanwhile, both nucleation rate and crystal-growth rate of alkali feldspar are not constant during the crystallization process, but vary with crystallization time. Here we suggest that the lag time should be taken into account in the calculation formula of nucleation rate and crystal-growth rate to obtain more reliable parameters.

关 键 词：ALKALI FELDSPAR NUCLEATION density NUCLEATION LAG NUCLEATION RATE CRYSTAL-GROWTH rate. 

分 类 号：P578[天文地球—矿物学]