48 GOLD PLACERS OF RAMPART REGION. 
A. number of igneous dikes which cross the lower part of Quail Creek show con 
siderable mineralization by metallic sulphides. An assay of a porphyry gave n( 
gold, but 0.52 ounce of silver « per ton. 
The creek was located in 1898, and it is said that it was desired to call the strean 
"Ptarmigan" Creek, but as no one in the party could spell ptarmigan it was namec 
"Quail," the spelling of which was easier. Some gold is said to have been taker 
out in that year, and a little was taken out during the summer of 1904. The total i; 
thought to be about $3,300. 
There seems to be a considerable accumulation of gravels at some places, while a 
others the bed rock rises to the surface. The gravels aie of the country rock, witl 
many bowlders of porphyritic granitoid rocks. 
A number of miners were fixing up old cabins and building new ones, and getting 
ready to prospect the creek during the winter. 
GUNNISON CREEK. 
Gunnison Creek is located a few miles farther down Troublesome Creek on th( 
same side as Quail Creek. Miners are said to have worked upon it during the sum 
mer of 1904, and to have taken out some gold, but no further particulars wen 
learned. The creek was not visited by the Geological Survey party. 
GENERAL SUMMARY. 
The alluvial deposits formed from the rocks of the valleys in which the deposit 
occur are found both in stream channels and on benches, and are probably all ool 
stream origin. They are of Recent and Pleistocene age, and their thickness is gen 
erally near 5 feet, but varies from 5 to 100 feet. 
The gold is generally found in the lower 2 or 3 feet of the gravel and upper 1 or ! 
feet of the bed rock, but on Shirley Bar and Omega Creek it is in places distributee 
through the whole depth of the gravel, 5 to 7 feet, and on Omega Creek the gold i: 
found not only in the gravel but through several feet of intimately mixed ice an< 
clay. 
The placers are of two general types as regards their origin, placers of ofdinarj 
concentration from the disintegration and wearing down of the bed rock, and placer 
formed through reconcentration of the gold in older gold-bearing gravels by th< 
cutting of streams. The bench gravels of the region and the placers of Ruby an( 
Slate creeks belong .to the first class. To the second class belong the placers of tin 
creeks cutting the high bench of Minook Creek and the placers of Doric, Glenn, an] 
Seattle creeks and Gold Run. The other placers of the region probably belong to thl 
first class, although there may be some reconcentrated gold in Thanksgiving am 
Quail creeks. 
The gold of the reconcentrated placers is generally smoother and brighter thai 
that from the others, contains less quartz and iron, owing to abrasion and oxidation 
and is thus higher in value per ounce, though the higher value of the gold of thi 
Minook group is principally due to its containing less silver than the gold of othe 
creeks. There is much crystallization in the gold, particularly of the Baker Creel 
group, where the gold contains a large percentage of silver. It is notable that alonjij 
Minook Creek, where the gold contains so little silver, native silver nuggets are fount 
in the placers, while in the Baker Creek group, where the placer gold contains aboj 
20 per cent of combined silver, there are no silver nuggets. The only other mineral 
known in the concentrates with the gold are hematite, a small amount of magnet 
ite on Thanksgiving Creek, pyrite, garnets on Ruby Creek, barite on a few othe 
creeks, and copper on Hunter, Little Minook, and Slate creeks. 
In all cases the matrix of the gold has probably been in the immediate neighbor 
hood of the placers, though it may be the result of the concentration of many bun 
aBurlingaine, E. E., & Co., Denver, Colo. 
