The Buclimo (Last Chance) workings were not accessible. From the surface work it is judged that at least four nearly parallel lodes exist on the property. These strike N. 80° W., and, to judge from the northerly dips at the surface, the ledges may come together with depth. It is said that from the surface to the tunnel level, 85 feet below, the lode has been stoped for a width of 10 feet and a length of 500 feet. A little ore, presumably from the tunnel level, found in a mill bin showed quartz-calcite veinlets, with pyrite and arsenopyrite in crushed, somewhat mineralized dark-colored sandstone and shale. The upper workings are reported to be abandoned now, and a long crosscut tunnel has been started from the level of Alder Creek, near the Grizzly incline. This crosscut is more than 1,800 feet long but has not reached the vein. It was run in a direction almost parallel to the vein and the strike of the sandstone beds. The first 200 feet of the crosscut is in medium-coarse sandstone; next there is 100 feet of black chert; and the remainder of the tunnel is in nearly black sandstone that is almost fine grained enough to be termed slate. This tunnel shows the formations to be very much broken and faulted, most of the movement being parallel to the bedding in dip as well as in strike, but with many planes of minor movement showing parallel strike but much steeper dip than the bedding.
The Melville claims, on the ridge between Alder and Willow creeks, appear to be a westward continuation of the Buclimo. A large open cut just below the trail exposes a much crushed zone of sandstone about 10 feet wide, with stringers of quartz that strike N. 70° W. and dip 50° N. It is said that all the material from this zone shows some gold.
The Brewery tunnels are north of the trail, about 200 feet down the slope toward Willow Creek from the mail-trail ridge and 1 mile west of Melville's cabin. They were caved at the time of visit but apparently were run on a ledge that strikes N. 80° W. and in the cuts dips 60° S. As exposed in the cuts the ledge matter is 6 feet wide and consists of fine-grained black sandstone, with veinlets of quartz and a little siderite. No sulphides were seen on the dump, but small casts of cubical outline filled with limonite indicate that the mineralization is similar to that at the Buclimo.
In the canyon of the South Fork of Willow Creek F. C. Hammond has several prospects on N. 800 W. zones of mineralization in the slates and sandstones. The metalliferous minerals here consist largely of disseminated pyrite a:rid chalcopyrite in hard dark-colored sandstone along a series of nearly vertical tight fractures. No arsenopyrite was noted. There is practically no oxidation on any of the ledges, though a little iron and copper stain is to be seen directly at the surface. At one of Mr. Hammond's claims, on the ridge between South Fork and Willow Creek, pyrite and a little chalcopyrite are disseminated along a shear zone in garnetized sandstone about 25 feet from a lens of serpentine. Very minor amounts of copper silicate and limonite coat the joints at the surface.
The Gorda property is on Spruce Creek in sec. 4, T. 24 S., R. 5 E. In 1902 several exceptionally large ragged gold nuggets were found in the stream bed near by. Considerable money was spent in equipping the property for hydraulic work, and a little more gold was obtained. The talus and soil cover, however, were so deep that the stream gravels had not been reached except over a short distance. A number of tunnels have also been run in talus to locate the rim of the covered channel, and some work has been done in the sandstone on the north wall of the gulch in the hope of discovering the source of the coarse gold, but this objective had not been reached in 1921. The sandstone cut by this tunnel is peculiar in that it contains small flat fragments of black slate, minute red garnets, and a small amount of finely. disseminated pyrite. The mineralization is localized in the sandstone within 150 feet of a considerable outcrop of serpentine.
The Buslmell property is on the point between the Middle and North forks of Willow Creek. The developments consist of an inclined shaft and a crosscut tunnel, 330 feet in all. The incline is sunk 130 feet on the intersection of a north-south fracture that dips 50° E. and a N. 50° E. stringer that dips 500 SE. It is reported that about $9,000 in free gold was milled from the ore obtained in sinking this shaft. At the tunnel level the north-south fracture is barren; the N. 500 E. fissure ranges in thickness from a knife-edge to 8 inches and is filled with white quartz, calcite, and fragments of wall rock, the whole much crushed and shattered. A little free gold is visible in some of the quartz, but no sulphides, limonite, or other indications of the former presence of sulphides were noted in the ore.
The Ocean View (Plaskett) property, on the west slope of the ridge west of the North Fork of Willow Creek, in sec. 30, T. 23 S., R. 5 E., is developed by an 86-foot incline, with short drifts to the northwest at 40 and 80 feet and a 100-foot drift tunnel to the southeast on the 40-foot level. The ledge strikes N. 45° W. and dips 10° NE. at the surface but steepens to 60° at the bottom of the incline. It consists of crushed white quartz, slightly iron stained but with no visible sulphides. It is reported that $18,000 in free gold was recovered from float picked up below the croppings and from ore obtained in sinking the incline. It is judged that the free gold occurred in a small lens, for the quartz exposed in the workings appears to be barren.
The placer gold found in small quantities in practically all the gulches but particularly on Spruce and Willow creeks was derived from the weathering of small veinlets similar to those disclosed in the properties described above. Most of the placer gold is in small ragged particles that have not traveled far from their source. The large nuggets found in Spruce Creek evidently came from a particularly rich pocket in the immediate vicinity.
The mineralization of the district is not particularly strong, and, although there may be further discoveries, near the surface, of pockets containing free gold, it is believed that all that can be expected below relatively shallow depths will be rather small bodies of pyritic ores of relatively low tenor.
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