Show COLORADO LEAD EXAMINED deposits of ceru site or lead carbonate near use ilse in the northeastern part of ouster county colorado were examined last year by J F hunter a geologist of the united instates geological survey and his report has just been published the deposits extend in a narrow belt tor for several miles along the foot of the steep western slopes of the wet mountains where faulting and crushing have produced conditions favorable to ore deposition the lead carbonate has been deposited in zones or shoots filling joint planes and cracks in crushed and altered granite investigations show that the carbonate ores have probably resulted from the oxidation of galena lead sulphide which should be found at greater depths than have yet been attained by mining or drilling only the upper portion of the ore deposits known know as the oxidized zone has been opened two important ore zones one at the terrible mine and the other at lead hill on the wild girl and high kicker claims were visited and a trip was made over lead hill into parker gulch revealing considerable ceru site strewn over the hills bills as float so that existence of additional bodies and zones of ceru site seems probable the mines of this district have hava been worked intermittently since 1884 and have of lead lea worth produced nearly from fro it Is reported that the ores averaged 5 to 8 per cent of lead and were capable calad run r of being concentrated to a product ores thus tn ning from 60 to 70 per cent the of s far mined contain a small amount sulphur sup but no zinc arsenic antimony or C A copy of the report bulletin the to may be obtained free on application arash director of the geological survey ington D C |