Bulletin of the United States Geological SurveyThe Survey., 1905 |
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altered apparently Bain bands barite belt Birdsville black shale bodies calcite Carboniferous Cave in Rock cent character chert considerable country rock course Creek crystals Cypress sandstone depth developed Devonian dike district dome druses east Elizabethtown erosion evidence Fairview fault planes fluorite fluorspar fluorspar deposits fluorspar occurs foot wall galena galena and blende gangue minerals Genevieve limestone Golconda hanging wall Hardin County Hicks igneous rock indicated Karbers Ridge Kentucky-Illinois lead and zinc Lead Hill Louis limestone Mansfield sandstone material mica miles mines minor amounts Mississippi Valley northeast number of points open cut outcrop oxide Pittsburg plain Pope and Hardin Pope County portion present probably prospecting pyrite quartz quartzite region relations represent River Rosiclare sandstone seems shaft Shetlerville shows southern Illinois spar stopes sulphides surface Survey Illinois Tertiary Tribune limestone Tullahoma U. S. Geol Ulrich upland vein vertical vicinity waters zinc carbonate
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Seite i - The serial publications of the United States Geological Survey consist of (1) Annual Reports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topographic Atlas of United States — folios and separate sheets thereof, (8) Geologic Atlas of United States — folios thereof.
Seite 66 - Trace. (a) (a) fluorine, but the evidence that the material did actually come from them is weak. If it is of any such origin, it presumably was not segregated during the weathering of the rocks and, recalling the field evidence, there seems little connection between particular dikes 'and individual ore bodies. PROCESS OF CONCENTRATION. There are two broadly contrasted methods by which the present ore bodies may have been concentrated. The first is by the action of the normal meteoric waters of the...
Seite 39 - Pyrite. — The iron sulphide, probably in the main pyrite, FeS2, is as usual widely disseminated. It is, however, distinctly subordinate in quantity, and in this particular the district is in contrast with many of the mining districts of the West. Chalcopyrite. — The copper-iron sulphide, CuFeS, (sulphur, 35 per cent; copper, 34.5 per cent; iron, 30.5 per cent; specific gravity, 4.1 to 4.3), occurs in minute quantities, and small crystals may frequently be observed by carefully examining the ores....
Seite 62 - ... amount of silver is small and its occurrence seems irregular, but that it is ever present to the amount indicated is striking. HA Wheeler has recently discussed this point in connection with the occurrence near Fredericktown, Mo., and in Algonkian felsites of a narrow vein of nonargentiferous galena.0 He argues from this that the neighboring lead deposits in the limestone were deposited by ascending waters of presumably deep-seated origin. If it prove gen" Preliminary report on lead and zinc...
Seite 68 - York price, to offset differences in freight rates to competing territory. There is a limited market for this grade of spar, and it probably would not be extended much even at lower prices, since the amount used is determined by conditions wholly outside the cost of the spar. On the other hand, it is a question whether even a higher price could not well be obtained for this grade. The second grade of spar is used in steel making, and is sold unground as lump or gravel. It includes colored spar and...
Seite 12 - ... after the settlement of the country that any serious attempt was made to mine it. The first important mining venture seems to have been that of a company headed by President Andrew Jackson, which undertook development near the site of the present Columbia mines, in 1835, in Crittenden County, Kentucky. In Illinois fluorspar seems to have been first discovered in place in 1839 when it was encountered with galena in sinking a well on the Anderson farm on what is now the property of the Fairview...
Seite 67 - The association of the minerals and the common phenomena of marked silicification of the hanging wall are interpreted as indicating deposition from heated ascending solutions carrying fluosilicates of zinc, lead, copper, iron, barium, and calcium. These are believed to have been broken up and precipitated by descending cold waters, which possibly also furnished the sulphur to combine with the metals, though it is not improbable that sulphur was an original constituent of the rising solutions.
Seite 70 - Chester formations have proved most favorable. In the Illinois mines nothing suggesting rearrangement of the ores and secondary enrichment coincident with degradation of the surface was observed. At the Empire mine carbonates gave place to sulphides within the first hundred feet, and below that level no change was observed. In the Kentucky mines a number of deposits of first-grade fluorspar are said to have given out or lost grade with depth. The significance of this fact is uncertain. Whether it...
Seite 9 - This paper embodies the results obtained in a detailed study of the fluorspar deposits of this important district, the study having been undertaken in connection with the investigation of the lead and zinc deposits of the Mississippi Valley region. The area covered is at present the most important producer of fluorspar in the United States. Very respectfully, CW HAYES, Geologist in Charge of Geology. Hon. CHARLES D. WALCOTT, Director United States Geological Survey.