Co.jpei-Tin Vdus ot tUe AkinoW District, 



35 



; ,;, The Daijuko Vein Group. 



The Daiju mine lies about 1 km. soutliwest of the village ot 

 Akénobé. The country rook consists of Mesozoio black carbo- 

 naceous slates or shales interstratifled with sandstone and others. 

 The shales are in places intensely silicif.ed and chloritized. TUe 

 general strike and dip of the complex are N. 20°-40o g. and N. W. 

 at 20°-40= respectively, thus being slightly different from those of 

 the grecnslate complex in the Daisen area. 



There are two main veins in this area, namely, Yebisu and_ 

 Daikokn, both varying in width from a fraction of one meter to 

 1 meter or more (Fig. 8). Their strike ranges between E.-W. 

 and N 60 W. and they dip northward very steeply. These vems 

 are worked chiefly for copper ore, but produce insignificant amounts 

 of thin plates of wolframite and microscopic grains of tm-stone, 

 their mineralogical composition being thus in accord with the 

 Hyakken vein of the Daisen vein group. Moreover, a banded 



