METALLIC MINERALS 327 



Nickel. — Nickel in the form of garnierite, the hydrous silicate of mag- 

 nesium and nickel, is known near Livramento, in southern Minas Geraes, 

 in rocks of either Paleozoic or Archean age.* 



Chromium. — Chromium is not worked at present in Brazil, but it is 

 probable that it occurs in considerable quantities in connection with the 

 serpentines of Bahia, Minas, etcetera. Williams reports it from Livra- 

 mento, Minas. 



Platinum. — Platinum has long been known from Minas Geraes, but, so 

 far as I have 'been able to learn, no effort has been made to work it. It 

 appears as sands in connection with the diamond-bearing alluvial deposits, 

 and in the auriferous iron sands of Gongo Soco and of Itabira do Matto 

 Dentro and on Eio Abaete, in the State of Minas Geraes. Claussen says 

 it is found also at Itambe (Notes geologiques, page 9) and elsewhere in 

 the terrain "traumeteux." The best paper is that of Hussak, an abstract 

 of which is given in the American Journal of Science, fourth series, vol- 

 ume XIX, pages 397-399, 1905. 



Boussingault (Minas) Lampadius 



Gehlen Svanberg (Analyses) 



Humboldt WoUaston 

 Hussak (Minas) 



Palladium. — Palladium from Brazil is treated of by Lassaigne, Seamon 

 (Minas), Wollaston, and Hussak (Minas). The most comprehensive 

 paper is that of Hussak in the Sitzungsberichte of the Vienna Academy, 

 Abtheilung I. 



Aluminum. — See Bauxite under non-metallic minerals. 



Tungsten. — Tungsten is reported from Espirito Santo and Minas 

 Geraes by Fr. Freise, Zeitschrift der Praktische Geologic, volume XVIII, 

 pages 143-146, Berlin, 1910. The tungsten minerals stolzite and raspite 

 also occur in Minas, but so far as now known only as mineral curiosities. 

 Tungsten is likely to be found anywhere within the area of the granites 

 and gneisses. 



Mercury. — Cinnabar is said to have been found in Minas near Ouro 

 Preto and at Tripuhi and Tres Cruzes. (See Hussak, Machado, and 

 Oliveira.) 



Molybdenum. — Francisco de Paula Oliveira reports molybdenum from 

 Eio de Janeiro on the road from Eio to Petropolis, in Parana, on Eio 

 Capivary 30 kilometers from Curytiba, and at Bahii, 42 kilometers from 

 Itajahy in Santa Catharina, and associated with copper at Palmas, Eio 



* H. E. Williams : Nota sobre a occurrencia de urn mineral de nickel perto da Villa de 

 Livramento . . . Minas Geraes. Boletin do Ministerio da Agricultura. vol. v, no. 1, 

 pp. 21-28. Rio de Janeiro, 1916. 



