1906. ] 



SMITH— PARAGENESIS OF MINERALS. 



191 



rence and associations, the carinthine being more common in the 

 rocks poorer in iron, and the pargasite in rocks where the iron is 

 extremely abundant. Both appear to be older than the glaucophane 

 which accompanies them, for that mineral is often found in re- 

 placement rims around the borders of the others, probably from 

 later accession of sodium silicate due either to a further decomposi- 

 tion of plagioclase, or to the bringing in of soda by solutions. 



Actinolitc. — Common green actinolite of the variety smarag- 



Analyses of Actinolite and Pargasite, 



< 



IV. 



fcfiS g 





54-30 



5-15 



3-87 

 19.01 

 13.72 



2.80 



0.30 



V. 



•*-» TO 



g u a 



53-10 



4.10 



21.80 

 10.40 

 10.60 



99-15 



VI. 





100.00 



41.26 



11.92 



4.83 



9-92 



13-49 



11-95 



1-44 



2.70 



0.52 



1.70 



VII. 



B 



bo Hi 



PL, 



99-73 



42.68 

 9.96 

 6.12 



12,25 



9-58 

 11.83 



3-30 

 0,89 

 3.28 

 0.68 



trace. 



VIII. 



<3 



100.57 



42.35 



8. II 



7.91 



10. II 



14.33 



13-31 



2.18 



1-87 

 0.91 



100.98 



I. Actinolite from Berkeley, California; W. C. Blasdale, Bull. Dcpt. Geol. 

 Univ. Calif., Vol. II., No. 11, p. 2)32)- 



II. Actinolite from San Pablo, California; W. C. Blasdale, analyst, 

 loc. cit. 



III. Carinthine from Carinthia; Rammelsberg, analyst; cited in Hintze's 

 Handbuch der Mineralogie, Vol. II., p. 1235. 



IV. Smaragdite from Lake. Geneva, Switzerland; Hunt, analyst; cited 

 in Hintze, op. cit., p. 1236. 



V. Actinolite from Zillerthal, Alps; Beudant, analyst; cited in Hintze, 

 op. cit., p. 1235. 



VI. Pargasite (black) from Finland; Rammelsberg analyst; cited in 

 Hintze, op. cit., p. 1239. 



VII. Pargasite from Calaveras Valley, California; W. O. Clark, analyst 

 (unpubhshed paper). 



VIII. Artificial amphibole, made by Chrustschoff, cited by Hintze, Hand- 

 buch d. Mineralogie, Bd, II., p, 1242. 



