Sentence:  The metals traditionally sought in the Bristol Bay region have been gold and copper, mostly in deposits near Lake Iliamna. An exception is a gold <WSD>lode</WSD> discovered about 1930 near Sleitat Mountain (4), where about $200 in gold was recovered from small quartz veins near the periphery of a small granitic intrusive body. 
Meaning of the word marked with <WSD> tags:  A vein of metallic ore that lies within definite boundaries, or within a fissure.