GEOLOGY OF MOOSE RIVER GOLD DLSTRICT — WOODMAN. 73 



amount below it, the percentage decreasing for some depth. In 

 the free state it takes the form of filaments or wires, leaves and 

 nuggety masses, small or large, and may be so fine as to be 

 entirely invisible. In some cases the free gold is accompanied 

 by sulphides, in others not. The larger masses are found usually, 

 but not always, in " pockets " or local spots of enrichment. 

 These are in some veins situated at or near the junction of angu- 

 lars, particular!^' from the hanging wall, and the bedded leads. In 

 other cases the metal is closely related to the presence of rolls, 

 lying most often in the swell on the hanging wall. A considerable 

 extent, either a whole vein or parts of several, may be character- 

 ized by the presence of these enriched spots, the spaces between 

 being wholly or comparatively barren. In this district such 

 accumulations are too discontinuous to form pay streaks, and 

 distinct ore chutes are not so common here as on the more per- 

 fect domes. Wherever they do exist, they follow the dip of 

 rolls. The Copper lead has one, with a very low west dip, in 

 division ii. The Little North has two, perhaps three, with the 

 same dip. These leads plunge west, and their rolls dip west, 

 the ore chimneys following these closely. The Big North has 

 one streak, on the west plunge, which was followed west to the 

 west fault and lost. 



Relations to vein ivalls. — In some belts the gold is so finely 

 disseminated as to be invisible. Such concentrations as can be 

 seen, yet not sufficiently high to call pockets, are often found in 

 sheets of irregular thickness, lining the vein wall and projecting 

 thence into the gangue. Rarely they tongue into the country 

 Tock. More often the sheets are smooth on that side, their 

 irregularity being entirely toward the gangue. Where the gold 

 lines the sides of rolls, it usually is bounded outwardly by a 

 rusted zone when near the surface. From this lining wiry 

 stringers, irregular masses and leaves project into the vein, often 

 along distinct fractures. 



Britannia and Kaidhack belts. — These are two of the most 

 instructive belts for the study of visible gold. In the former. 



