These samemetalliferous combinations are found also in Franconia, in the grunsteins of the mountains of Steben and Lichtenberg.
The most metalliferous of these contacts are those at the base of the slates, the lowest contact of the series being the richest.
He says, "the slag of bismuth, mixed together with metalliferous substances, which when melted make a kind of glass, will tint glass and earthenware vessels blue.
In this buddle is generally washed that metalliferous material which has been sifted through the large sieve into the tub containing water.
This cement lacks the ingredients of metalliferous origin, such as verdigris and vitriol, for if these are in the cement, the gold usually takes up a little of the base metal; or if it does not do this, it is stained by them.
He must also be well acquainted with all methods of washing, so as to teach the washers how the metalliferous earth or sand is washed.
Experienced miners, when they dig the ore, sort the metalliferous material from earth, stones, and solidified juices before it is taken from the shafts and tunnels, and they put the valuable metal in trays and the waste into buckets.
In the same manner, from other mixtures of vitriolic and metalliferous material are made vitriol and metal.
On each side it has handles, which are held in the hands by whoever washes the metalliferous material.
This powder is sprinkled over any metalliferous ore which does not easily melt when we are assaying it, and it causes the slag to exude.
These shafts continue vertically toward the depths of the earth, and by means of a hauling-rope the broken rock and metalliferous ores are drawn out of the mine; for which reason miners call them vertical shafts.
Afterward they return to their task, which they continue until the metalliferous material is exhausted, or until the water can no longer be diverted into the ditches.
The metalliferous material is sometimes found not very deep beneath the surface of the earth, but sometimes so deep that it is necessary to drive tunnels and sink shafts.
Such metalliferousmaterial is usually found torn away from veins and stringers and scattered far and wide by the impetus of water, although sometimes venae dilatatae are composed of it.
Fournet states that all the minute fissures of the metalliferous gneiss near Clermont are quite saturated with free carbonic acid gas, which rises plentifully from the soil there, as well as in many parts of the surrounding country.
The most productive metalliferous deposits are found in meridional bands.
Sometimes even the fissures are coated by the metallic minerals, and the other minerals which accompany them in their metalliferous beds.
Metalliferous veins are common, amongst the best-known being the silver-bearing lead veins of Klausthal, which occur in the Culm or Lower Carboniferous.
A metalliferous deposit characterized by the impregnation of the mass of rock with many small veins or nests irregularly grouped.
It was especially used in the case of the gangue minerals of a metalliferous vein.
Bonpland and I traversed this vast group of mountains, its structure seemed to us extremely uniform, it would be wrong to affirm that it may not contain very metalliferous transition rocks and mica-slates superimposed on the granite.
These garnets re-appear in the trachytic porphyries that crown the celebrated metalliferous mountain of Potosi, and in the black and pyroxenic masses of the small volcano of Yana-Urca, at the back of Chimborazo.
But in rocks with metalliferous veins the miner does not at once know all he has to work.
This local enrichment of the vein is due to the reconcentration of its metalliferous ores.
Thus in soluble rocks, such as limestones, joints enlarged by percolating water are sometimes filled with metalliferous deposits, as, for example, the lead and zinc deposits of the upper Mississippi valley.
How are the minerals usually arranged in the great metalliferous veins?
Not unfrequently, however, the more or less irregularly ramifying, non-metalliferous veins appear as if they had segregated from the body of the rock in which they occur, as in the case of the quartz veins in granite.
Why the junction of lodes is often found to be more richly metalliferous than neighbouring parts is probably because there the depositing reagents met.
Each of these immense metalliferous deposits was found outcropping on the summit of a hill of comparatively low altitude.
As has already been stated, the likeliest localities for the occurrence of metalliferous deposits are at or near the junction of the older sedimentary formations with the igneous or intrusive rocks, such as granites, diorites, etc.
A tunnel has been formed at the bottom of the mine through which the waters flow after they have performed their task, which also carries away the crushed granite, while the heavier metalliferous substances are precipitated into the troughs.
Its principalmetalliferous sites are the Hartz Mountains, on the borders of Hanover and Prussia, and the Erzgebirge or Ore Mountains, which separate Saxony from Bohemia.
These mines were explored in the metalliferous rock.
This diluvium is, in truth, of the same era as the wide spread stream of like kind, which has been deposited over the metalliferous region of Missouri.
Defn: A metalliferousdeposit characterized by the impregnation of the mass of rock with many small veins or nests irregularly grouped.
Defn: An irregular metalliferous mass filling a large cavity in a rock formation, as a stock of lead ore deposited in limestone.
In almost every point of England where that metalliferous limestone appears, there are explorations for lead and zinc ores.
No greater importance can be attached to metalliferous sands and saline springs.
It is equally metalliferous with porphyry; in the island of Cyprus, it is rich in copper; and in Hungary, it contains many valuable gold and silver mines.
The large and proper metalliferous veins are not equally distributed over the surface of Cornwall and the adjoining part of Devonshire; but are grouped into three districts; namely, 1.
The neighbourhood of Alston-moor in Cumberland, of Castleton and Matlock in Derbyshire, and the small metalliferous belt of Flintshire, are peculiarly marked for their mineral riches.
This phenomenon affords a strong indication of the igneous origin of metalliferous veins.
The non-metalliferous exterior portion, which is often the largest, is called gangue, from the German gang, vein.
The earthy matters which accompany the pyrites are usually siliceous, though in some mines the metalliferous deposit is mixed with clay or fluate of lime.
In the upper part of the figure we see issuing from the stamps, two conduits destined to receive the water and the metalliferous sand with which it is loaded.
The great tin veins are the most antient metalliferous veins in Cornwall; yet they are not all of one formation, but belong to two different systems.
This metalliferous deposit lies in a greenish clay slate, passing into talc slate; a rock associated with serpentine and euphotide (gabbro of Von Buch).
The workable bed has a height of 66 feet, and consists of metalliferous blocks mixed confusedly with sterile masses of the rock; the whole covered with a rocky detritus, under a brownish mould.
The reader who will cast his eye over the map of Mexico, will at once perceive that the geographical space covered by this metalliferous region, is small when compared with the great extent of the whole country.
Besides copper, lead, and silver, there is some gold in these ancient or primary metalliferous veins.
Metalliferous Veins in Strata near their Junction with Granite.
As some intelligent miners, after an attentive study of metalliferous veins, have been unable to reconcile many of their characteristics with the hypothesis of fissures, I shall begin by stating the evidence in its favour.
A large proportion of metalliferous veins have their opposite walls nearly parallel, and sometimes over a wide extent of country.
They are common even in cases where there has been no shift, and occur equally in non-metalliferous fissures.
Metalliferous veins referable to such agency are occasionally a few inches wide, but more commonly three or four feet.
The formation of recent metalliferous veins is now going on, according to Mr. Phillips, in various parts of the Pacific coast.
On the other hand, the veins which traverse stratified rocks are, as a general law, more metalliferous near such junctions than in other positions.
In 1906 the Notice of Accidents Act provided for improved annual returns of accidents and for immediate reporting to the district inspector of accidents under newly-defined conditions as they arise in coal and metalliferous mines.
Metalliferous Mines Acts, and under the inspection of the inspectors appointed under those acts; further, it transferred the duty of enforcing the Factory and Workshop Acts, so far as they apply in quarries over 20 ft.
In the British Isles we find that the megaliths in the main coincide with the metalliferous areas, though in some cases more closely with lead ores than with the metals previously mentioned.
Sufficient attention does not appear to have been bestowed, by mineralogists, upon the metalliferous soil of the Mississippi Valley.
It is manifestly the same great metalliferous rock which accompanies the lead ore of Missouri and mines of Peosta or Dubuque.
It does not, in fact, appear that the red sandstone, which constitutes the principal rock formation of the southern shore of Lake Superior, is in any instance metalliferous in any considerable degree.
At Vanmater's, the metalliferous clay marl is overlaid by a grayish sedimentary limestone.
It will be sufficient to observe, that the number of these new discoveries justifies the expectations that have been created respecting the metalliferouscharacter of the region of the Ontonagon, and the south shore of Lake Superior.
I also found this mineral at Dubuque's mines, and in small crystals in the metalliferous limestone bordering the Fox River, between the post of Green Bay and Winnebago Lake, where it is associated with iron pyrites and blende.
The stratification is exclusively sandstone and limestone, in the usual order of the metalliferous series of the West, and lying in horizontal positions.
The occurrence of this metal in the copper-bearing and other metalliferousrocks of this region, may be confidently affirmed.
Traces of this metal, chiefly in the boulder form, are found in the metalliferous horizontal strata.
I did not observe any masses of radiated quartz, which form so conspicuous a trait in the surface of the metalliferous diluvion of the mining district of Missouri.
With the exception of one species, namely, the ores of copper, the region has not proved as attractive in this department as I found the metalliferous surface of Missouri.
A metalliferous vein is provincially called a Lode.
Average width of the metalliferous veins--Depth of the principal mines, 181.
The hornsilvers all occur under similar conditions and are often associated together; they are found in metalliferous veins with native silver and ores of silver, and are usually confined to the upper oxidized parts of the lodes.
An impregnation is an irregular segregation of metalliferous minerals in the mass of some eruptive or crystalline rock.
In metalliferousveins the minerals containing the metal sought for (the galenite, sphalerite, etc.
It has often been observed inmetalliferous veins that the richness varies with the nature of the adjacent country rock.
Metalliferous veins, especially, are usually deeply decomposed along the outcrop by the action of atmospheric agencies.
His most important memoirs on the metalliferous deposits of Cornwall and Devon were published in 1843 by the Royal Geological Society of Cornwall.
At a much later date he communicated with enlarged experience a second series of Observations on Metalliferous Deposits, and on Subterranean Temperature (reprinted from Trans.
In 1822 he commenced work as a clerk in a mining office, and soon took an active interest in the working of mines and in the metalliferous deposits.
Crumbling outside, the lower strata pass from the cellular to the compact, and are often metalliferous when in contact with the quartz: at these Salbandes the richest mineral deposits are always found.
The formation of the country much resembles that of Midian; and the metalliferous veins run from northeast to south-west.
These metalliferous quartzes cannot be further from the coast than a maximum distance of fourteen miles, and the broad, smooth watercourse, with its easy gradients, points it out as the site of the future tramway.
The latter gentleman, who probably did not, like the former, place Mexico in South America, makes the metalliferous lands measure four-fifths of the total surface.
The principal object of this journey had been to investigate the inland depth of the metalliferous deposits; in fact, their extent from west to east.
Every Wady which cuts, at right angles, the metalliferous maritime chains, should have been carefully prospected; these sandy and quartzose beds are natural conduits and sluice-boxes.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "metalliferous" in a variety of sentences. We hope that you will now be able to make sentences using this word.
