30 ART. 12. — B. KOTÔ : 



locally rich in quartz veinlets. The assay on the specimens from 

 an altered, porous limestone of an earthy aspect colored with iron 

 oxides, gave the following results : — 



Gold Silver Copper 



0.0002 0.0032 1.05 



0.0002 0.0010 0.09 



The gold washing seems to have been carried on not only 

 on the placer gold, but also on the earthy product which occurs 

 intermixed with the solid limestone. 



Salku-chhi^^ , and Kullyang-hol'\ To the east of the Ilol-gol 

 mine within the massive limestone terrane of Salku-chhi and 

 Kullyanghol (J and H on the map), precipitous cliffs often show 

 red and yellow stainings with iron oxides. Heaps of débris, once 

 worked for gold dust, are seen along the valleys. 



Neureum-hogld "^. About 4 hni northeast of Hol-gol, the same 

 kind of rocks as those of the preceding could be noticed in the 

 limestone at Neureum-hogai. Near a river, gold washing was 

 formerly in operation. 



S'ôh-iari ^\ About 600 m upstream from Sök-tari, we see one 

 large mass of milky white quartz by the road side. An assay 

 was made of a specimen from here and gave 0.0001 for gold, and 

 0.0015 for silver, but it was not fully ascertained whether the 

 quartz occurs in the form of a vein or a lenticular rock-mass inter- 

 calated in stratified rocks. 



Heung-kol^\ Gold washing was carried on until ten years 

 ago in the valley of Heung-kol, which lies 8 km west of the Hol- 

 gol mine. The home of the placer gold here as elsewhere seems 

 to be in the limestone. 



]) ^fli^ 2) wMm y) m^ ^) ivs ï>) mm 



