Bulletin, Ausgabe 1The Survey, 1893 - 239 Seiten |
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20 feet acid Phosphorus ratio ALLEGHANY COUNTY Alumina ANALYSIS OF MAGNETITE ASHE COUNTY bank Baskerville belt Bessemer blackband Bloomery Bloomery Forge brown hematite Buckhorn Catawba CHATHAM COUNTY CHEROKEE COUNTY Chromic oxide country rock Cranberry deposits depth epidote exposed feet thick following analysis formation furnace gangue Gaston county gneiss Helton creek hill hornblende inches iron Sulphur Phosphorus limonite Lincoln county Magnesia magnetic magnetite manganese manganiferous Metallic iron Phosphorus Metallic iron Sulphur Mica Schist micaceous miles east miles north miles northeast miles south miles southwest miles west mining Mitchell county mountain North Carolina opening outcrop Phosphorus Phosphorus ratio Phosphorus Titanic acid pig iron pits quartz quartzite railroad Red Hematite ridge schist shaft Silica Metallic iron slate slope southeast Sulphur Phosphorus Phosphorus Sulphur Phosphorus Titanic surface Titanic acid Titanic acid Phosphorus TITANIFEROUS MAGNETITE tons of bars trace tunnel U. S. 10th Census vein vertical Yadkin
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Seite 107 - ... that had been impregnated with magnetite crystals. In the hematitic variety the schists remnants seem to have been replaced by hematite. According to Willis170 there were two groups of pits and trenches on the ridge about a quarter of a mile apart. At the northern workings the ore deposit was reported to be from 6 to 10 feet thick at a depth of 30 feet. A sample found near the old shaft contained 59.24 per cent of iron and .03 per cent. of phosphorus. The southern workings are more extensive....
Seite 63 - ... of Friendship in Guilford County. It was examined in 1871 by JP Lesley and as the result of his work it was operated for local forges. The ore was traced for a mile in a direction N. 77° E. (See Figure 24.) A shaft was sunk to 109 feet cut two beds of ore of which one was 12 feet thick. Their dip is about 70° a little east of south, but is said to change to northwest at a greater depth.
Seite 59 - Guilford county (after Lesley). Similar irregularities are noticeable everywhere. The miners say that the pitch of the ore bed, worked in the Sergeant tunnel and shaft, was southeast for some way down, after which it took its regular northwest dip; besides which there were in fact two beds cut in this shaft and tunnel, the smaller bed underlying the other, and with a dip that would carry the two beds together at some distance beneath the floor.
Seite 105 - ... mine in some detail. He states that the ore was a compact magnetite that was worked about the middle of last century by open cuts and tunnels. The old openings, writes Nitze, "occupy a longitudinal extent of several hundred yards, starting at Cooper's Branch. The strike is about N. 20° E. and the dip steeply to the northwest (nearly vertical). The relative positions of the old cuts show the existence of three parallel ore bodies or lenses. 30 and 50 feet apart.
Seite 67 - ... 1.80 0.74 Metallic iron 54.17 55.61 " manganese 0.96 0.82 Alumina 2.66 3.82 Magnesia 3.09 1.80 Lime 0.69 0.55 Titanic acid 14.46 13.92 Chromic oxide 0.97 1.07 No. 334. Fine-grained, black, slightly micaceous ore from the Shaw mine. No. 335. From Hopkins place, adjoining Shaw mine on northeast. One of the constituent elements of the whole formation is ochre, in beds of various sizes. On the plantation of J. Somers, on Brushy creek, a bed of 20 feet in thickness rises, nearly vertically, out of...
Seite 156 - No. 34, p. 68, 1014. i"Op. cit., p. 156. opening was in the "shape of an undercut in the side of the hill into which it extends perhaps 50 feet as a slope." The seam which dips northeast is at least 6 feet wide, the lower two feet being the harder. Nitze's analyses correspond closely with those furnished by Pratt. They are as follows: Nitze's analyses of ore from Waughbank property, Lansing, Ashe County, NC...
Seite 89 - The above-mentioned layers shade into one another; thus the sandstone or quartzite. A, passes into the siliceous talcose schist, B, which in turn graduates into the 'front' vein, C — a mass of actinolitic, chloritic (somewhat talcose) slate, with iron ore in grains or in lenticles.
Seite 30 - The Blackband and Ball ores of the Coal Measures occur in regular stratified layers or seams, conformable to the coal and carbonaceous slates. The Red Hematite ore in Chatham and Moore counties occurs similarly interstratified in the Triassic red sandstone. The Bog ores occur as local deposits usually in swampy or marshy places, or around the mouths of springs from which they have been deposited. They cover comparatively small areas, and are altogether irregular in extent. EARLY MANUFACTURE OF IRON...
Seite 113 - ... Boston Mountains. It is well developed at the town of Batesville and has been named, by the State Geologist, the Batesville sandstone. It consists of a brown or buff colored, fine grained sandstone, generally soft, th.ough sometimes hard. It splits easily along the lines of bedding, in slabs varying from a few inches to three or four feet in thickness, and is extensively worked for structural purposes at Bartlett's quarry, in Batesville. The shales in the sandstone occur as lenticular deposits,,...
Seite 95 - These have been followed 1J^ miles to the southwest, but neither has been opened. About 3 miles farther northeast on the waters of Anderson Creek, two prospect shafts cut ore which Nitze declares is on the same belt; although it has not been traced through the interval. In one shaft the ore widened from 15 inches at the surface to 2 feet at the depth of 40 feet. In the other shaft, at a depth of 16 feet the ore was only 10 to 12 inches thick. The ore is described as "a slaty magnetite, which breaks...