Abstract
The ore in the adit 130 level, No.10 line is classified into three types in the texture, i. e., black ore, yellow ore and siliceous ore.The black ore is composed of sulphide bands with several millimeter wide, and its mineral assemblage consists of sphalerite and galena with pyrite, chalcopyrite, tetrahedrite and small amount of bornite. Pyrite ore seam in the ore is characterized by several types of colloform texture and euhedral orsubhedral pyrite grain.The yellow ore is weakly banded, but where it is highly enriched with chalcopyrite and clay minerals, fine banding of pyrite ore and chalcopyrite ore is observed. In the lower and middle part of the ore, ore is compact and cataclastic texture is observed, but in the upper part of the ore, fragments of yellow ore showing the colloform texture are often observed.The siliceous ore is composed of pyrite, chalcopyrite, quartz and volcanic fragments. Pyrite of the ore in the southern part occurs as the principal ore mineral, disseminated between quartz grains or as pools of aggregates. It is characterized by euhedral or subhedral from. But pyrite of the ore in theno rthern part differs from it in the southern part in type, and fine banding of quartz-pyrite-chalcopyriteore is observed. Fine banding of the ore cuts the boundary between yellow ore and siliceous ore, and in the upper part fragments of yellow ore Showing the colloform texture are observed.
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