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Emmous reports it to be, it is too rich, for the rock that has furnished so large a quantity of ores as that which formed the ore bodies which I saw in the Little Chief and Highland Chief mines, respectively 90 feet and 162 feet thick, should be poor in silver and iron and lead, and should be rotten from the leaching it had suffered, but except near the ore-bearing contact it is compact and normal.
Hence it seems much more natural to suppose that the great sheets of ore-bearing quartz now contained in the Comstock fissure were deposited by ascending currents of hot alkaline waters, than by descending currents of those which were cold and neutral The hot springs are there, though less copious and less hot than formerly, and the natural deposits from hot waters are there.
The ore-bearing rock, however, must first be ground to powder before it can be separated; hence, we will now begin at the root of this operation and consider the "giant rolls," which Edison devised for breaking huge masses of rock.
The porphyry vein matter or ore-bearing quartz, having decomposed more readily than the trachyte of the mountains which they intersect, in some instances, as in the peak just above our cabin, they have cut deep notches in the summit of the ridges, making the outline very jagged and rugged looking.
Syx, wearing its most discomposing smile, and a moment later the broader countenance of President Boon loomed in the electric glare beside the doctor's black framework of eyebrows and mustache. Behind them were grouped the other visiting financiers. "This tunnel," said Dr. Syx, "leads to the mine head, where the ore-bearing rock is blasted."
We can imagine, and we are forced to conclude, that there has been a zone of solution below, where steam and hot water, under great pressure, have effected the leaching of ore-bearing strata, and a zone of deposition above, where cavities in pre-existent solidified and shattered rocks became the repositories of the deposits made from ascending solutions, when the temperature and pressure were diminished.
"There isn't anybody here who even knows how to make one. Most of our nuclear engineers could work one up, in about three months, when we'd either not need one or not be alive." "Dr. Gomes, who came in on the Pretoria, two weeks ago, can make them," she contradicted. "He built at, least a dozen of them on Niflheim, to use in activating volcanoes and bringing ore-bearing lava to the surface."
President Boon not only submitted the specimens of ore-bearing rock which he had brought from the mine to careful analysis, but also appealed to several of the greatest living chemists and mineralogists to aid him; but they were all equally mystified. The green substance contained in the ore, although differing slightly from ordinary chrysolite, answered all the known tests of that mineral.
But I can, tell you, it was an ugly feeling when, on preparing to emerge with some specimens of the ore-bearing rocks, we found ourselves facing a grim semi-circle, banked dozens deep, of those famished coyotes. They greeted our appearance with a howl, and when we tried to scare them off they just settled down on their haunches to wait."
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