74 GEOLOGY OF MOOSE RIVER GOLD DISTRICT — WOODMAN. 



the only large accumulations were a series of pockets on a roll 

 in the main vein. Here the metal occurred chiefly close to the 

 hanging wall, running thence into the quartz. In this it lay as 

 interlacing stringers, leafy expansions, and knotty bunches. 

 Leaves were rare. In places the quartz was so intersected by 

 wires that it could not readily be separated from the gold with- 

 out fine crushing. 



The Kaulback belt is composed entirely of angulars ; but 

 these are in the main parallel to the strike of the sediments, and 

 are interstratified in parts. Evidently their origin is the same 

 as the bedded leads. As a belt they follow the sediments ; as 

 individuals they do this only occasionally. In these veins the 

 gold is more often on the margin than elsewhere, but in some 

 places is abundant in the center. Certain characteristic appear- 

 ances are reproduced in pi. 17, figs, c, d, e, f, g. Figs, c and d 

 are typical of many cases, the gold lining the side of the vein, 

 extremely smooth toward the country rock, rarely standing out 

 into the slate, but serrated irregularly by projections on the vein 

 side. These projections are usually small stringers, but occasion- 

 ally too thick and obtuse to bear that name. The main part of the 

 leaf is so thin that it can readily be peeled off from the quartz. 

 These two figures are from a small mammillary bulge on the side 

 of the vein. Such bulges are abundant. A little pyrite and 

 arsenopyrite were in the quartz, but the gold appeai-ed to bear 

 no definite relation to them. In some instances, as in fig. g, 

 the gold leaves the vein margin entirely, and runs some distance 

 into the slate. 



The gold of this belt is often closely associated with a steel 

 colored mineral, whicli n ay be slightly altered arsenopyrite 

 but does not have all of its superficial characters. The surface 

 of the gold leaves is pitted with it, and it usually has a vesicular 

 character itself. Inability to take away any of the specimens 

 in which it was seen has made positive identification impossible. 

 Both pyrite and arsenopyrite are abundant in the veins of this 

 belt, in crystalline as well as massive form. This applies par- 



