Bulletin, Ausgabe 3The Survey, 1896 |
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50 feet argillaceous Assays assays show Barnhardt beds body brecciated brown CABARRUS COUNTY calcite Capps carries cent chalcopyrite Charlotte chloritic concentrates contains copper pyrites Counties of N. C. Counties of North country rock creek cross vein Davidson Davidson County decomposed deposits diabase dike distance drift dump East vein Emmons feet deep feet in thickness feet thick feet wide fissure following assays foot level free gold galena galenite gangue gneisses Gold Hill granite gravel group of mines hanging wall iron pyrites low grade main vein mass Mecklenburg County Midland Counties miles southeast mineral nearly North Carolina northeast northwest nuggets occur outcrop parallel Phifer placer plate porphyry quartz veins reported rich Rudisil sample schistosity schists seams sericitic shoot siderite silicified Silver Hill situated slate belt South shaft southwest stamp mill Stoped strike stringers sunk surface Taconic trace Union County vein matter vertical West vein
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Seite 41 - Brecciated Conglomerate: This is the most remarkable mass of this division of the system. It has an argilaceous or chloritic base. The mass is composed in the main of fragments of other rocks mostly retaining an angular form, but frequently, rounded and worn rocks are inclosed in the mass.
Seite 80 - Ophir 1 (Davis), Spanish Oak Gap, Dry Hollow, Island Creek, Deep Flat, Pear Tree Hill, Toms . Creek, Bunnell Mountain, Dutchmans Creek, and the Worth. The available portions of these placers have been exhausted so far as the present supply of water will answer. The Beaver Dam placer is located about 5 miles west of Eldorado. The SAM CHRISTIAN mine is situated on the west side of the...
Seite 28 - Argillaceous, sericitic (hydromicaceous), and chloritic metamorphosed slates and crystalline schists. 2. Sedimentary pre-Jura-Trias slates. 3. Ancient volcanic rhyolites, quartz-porphyries, etc. (flint, hornstone, etc.), and pyroclastic breccias, often sheared. This area of metamorphic slates and schists embraces a belt extending in a general southwesterly direction across the central part of the State, and varying in width from 8 to 50 miles. It is bounded on the west by the central igneous area...
Seite 39 - ... microscopical specimens could be prepared, they were more carefully examined, but no trace of organic structure could be detected, the entire mass being evidently a fine grained quartz. The specimens examined were undoubtedly authentic examples of Paleotrochis, as some of them presented to the Yale cabinet by Prof. Dana, were sent to him by Prof. Emmons, and the rest were given to the writer by Prof. "WC Kerr, the present State Geologist of North Carolina.
Seite 40 - They appear, however, to have some analogy with " cone in cone," which, as the writer has shown elsewhere,i is probably due to the action of pressure on concretionary structure when forming. In some respects the two are quite distinct, but evidence of pressure is clearly to be seen in both.'' Kerr evidently agreed with Marsh as to the inorganic nature of the Paleotrochis, and Mr. CD Walcott, the director of the US Geological Survey, entertains the same opinion. According to both Emmons' and Kerr's...
Seite 168 - ... practically no gold was obtained from the silvered copper plates. The concentrates from the two Frue vanners amounted to 2 tons, which were so dirty that they were run over and reduced to 260 pounds. The tailings on this second run showed enormous loss, especially in galena and floured ainalg ira, due either to the inefficiency of the vanner or more probably to inexperience in operating the same.
Seite 174 - ... inches. 294. Sampled across vein, 1 inch (Brown Ore). 295. Compact pyrites, covered with coating of brown oxide. At the SMITH MINE, J mile east of the above, there are similar rich narrow veins, the occurrence being strikingly like that at the Carolina Queen mine in Burke county. BURKE COUNTY. THE BROWN MOUNTAIN MINE is situated 13 miles north of Morganton on Caney branch, a tributary of Upper creek. The main mass of Brown Mt. is made of granite, while its western slope, towards Upper creek,...
Seite 150 - MINE is situated 4J miles slightly south of east from Catawba Station on the Western North Carolina RR The mining tract comprises 425 acres, but the workable portion of this tract embraces only 20 acres. This latter area is covered with auriferous quartz, and the soil is also auriferous. The underlying schists and gneisses are penetrated by seams of auriferous quartz, which run in every direction : but of veins, in any mining sense of that term, it may be doubted if there are any, although some of...
Seite 138 - THE MEANS MINE is situated J mile nearly southeast from the Capps. By some investigators it is thought to be a continuation of the Jane and by others of the Capps vein, but it scarcely seems probable that either of these opinions is correct. « The vein has been worked at different points, and in the "Wallace shaft to a depth of 175 feet. The present work is at a vertical depth of 25 feet (36 feet on the incline), but preparations are being made for sinking to a new level. The exposure at the face...
Seite 136 - This body in the 130 foot level is found at a point 125 feet south of the Bissell shaft, ,and extends north as far as the work has been prosecuted. The shoot cannot be less than 200 feet long, and judging from the 90 foot level, it may be 300 feet.