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18 1996 8 118 1996 V o l A ug COM PU T IN G T ECHN IQU ES FOR GEO PH YS ICAL AND GEOCH EM ICAL EXPLORA T ION Ξ X    ΞΞ ( )   X , X X , X X (EDXR F ) , , [ 1, 2 ] EDXR F , [ 1, 3, 4 ] , , , EDXR F , X 1 EDXR F , , 1 , , , , Cu Zn Pb Ξ ( ) ( ) 305 75- 56- 03- 14 ΞΞ ( ) : 1996- 04- 10; : 1996- 07- 30: 1 : 610059 © 1994-2006 China Academic Journal Electronic Publishing House. All rights reserved. 24 18 Cu ; ; Zn Pb , , Cu Zn Pb , , Pb , N i Cu 0.