评花岗岩的哈克图解_张旗.pdf

31 3 Vol. 31, No. 3: 425~ 431 2012 5 ACTA PETROLOGICA ET MINERALOGICA May, 2012 #花岗岩新思维问题讨论#( 2) 张 旗 ( , 100029) : , , , , , , , , , : ; ; ; + : P5 . 12 1 : A : 1000-6524( 2012) 03-0425-07 A discussion on Harker di agram of granites ZHANG Qi ( Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China) Abstract: Harker diagram is considered to be fundamental in the study of magmatic fractionation. However, the conclusions draw n from the diagram are dependant on basic geological facts instead of on the diagram itself. Fractionation trend of magmas demonstrated on Harker diagram is derived from the study of layered intrusions formed from basaltic magmas, and hence Harker diagram is not suitable for the study of granitic rocks. M any conclusions based on Harker diagrams of granitic rocks are not consistent w ith the basic geological facts. Key words: Harker diagram; granitic rocks; basalt; magmatic fractionation , , / 0 , , , ? , , , , 1 : , , , , , , , , , , , : 2011-12-15; : 2012-04-09 : ( : ( 1937- ) , , , , E- mail: zq1937@ sina. com 4 26 31 Ajaji ( 199 ) , ? , Tanncherfi ( 344 Ma) , , : ( ) , ; ( ) , Nd-Sr , , , ; ( 1 2) : ( ) , , ( , 2007, 200 ; , 2012) ; , ; ( ( , 2012) , )