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Updated: June 26, 2025
History proved to the point of proverb that whenever McGinnis visited a camp, and he had followed scores of strikes and stampedes in all the corners of the metalliferous world, that camp was destined to witness a boom at no distant day. McGinnis was not actually a newcomer at Heart's Desire, but upon the contrary one of the autochthones of that now decadent community.
Who made it, this respectable English Land, wheat-growing, metalliferous, carboniferous, which will let readily, hand over hand, for seventy millions or upwards, as it here lies: who did make it?
From this metalliferous field of Lorraine came the ore that supplied eighty per cent of the steel required for German and Austrian guns and munitions. These fields of Briey were only twenty miles from the great guns of Verdun.
Upper Georgia the capital of which is Atlanta is a fruitful, productive, metalliferous region, that will in time become quite wealthy. Lower Georgia, which has an extent about equal to that of Indiana, is not only poorer now than a worn-out province of Asia Minor, but in all probability will ever remain so.
"He takes photographs, for instance," I suggested. "Yes. But not ordinary amateur photographs; his work is more technical and quite excellent of its kind. For example, he did a most beautiful series of micro-photographs of sections of metalliferous rocks which he reproduced for publication by the collotype process, and even printed off the plates himself." "I see.
We also know that mineral veins are most metalliferous near the contact of Plutonic and stratified formations, especially where the former send veins into the latter, a circumstance which indicates an original proximity of veins at their inferior extremity to igneous and heated rocks.
It is also an important circumstance that near the point of contact, both the granite and the secondary rocks become metalliferous, and contain nests and small veins of blende, galena, iron, and copper pyrites. The stratified rocks become harder and more crystalline, but the granite, on the contrary, softer and less perfectly crystallised near the junction. Mem. de la Soc. d'Hist.
It is as though they were streams, one rich, the other barren, and that after meeting, the wealth of the one was divided between them. It is a general rule that metalliferous veins running parallel with the strata of the bed-rock or country are not extensive.
It would probably contain, like the sea-subtending mountains of Midian, large veins of eminently metalliferous quartz, outcropping from the surface and forming extensions of the reefs below. From the coast-line the land gradually upslopes towards the spurs of the great dividing ridge; and thus we may fairly expect that the further north we go the richer will become the diggings.
Mount Bischoff, Tasmania, has produced, since the formation of the Company to December 1895, 47,263 tons of tin ore. It is still in full work and likely to be for years to come. Each of these immense metalliferous deposits was found outcropping on the summit of a hill of comparatively low altitude. There are no true walls nor can the ore be traced away from the hill in lode form.
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