The Adirondack Graphite Deposits

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University of the state of New York, 1918 - Graphite - 144 pages
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Page 2 - Vice Chancellor --------- Albany 1922 CHESTER S. LORD MA LL.D. ----- Brooklyn 1930 WILLIAM NOTTINGHAM MA Ph.D. LL.D. - - Syracuse 1921 FRANCIS M. CARPENTER ------- Mount Kisco 1923 ABRAM I.
Page 142 - ... been derived from preexisting metamorphic rocks wh'ch have suffered disintegration. We can dismiss this factor as unimportant in the formation of the Dixon schist. Walcott3 has suggested that the Dixon is a metamorphosed coal seam. There are several serious objections to such an interpretation, (i) The metamorphism of a coal bed usually gives a true amorphous or microcrystalline form of carbon; (2) from our present knowledge of coal it would seem improbable that a sufficiently developed form...
Page 123 - Natur der'feldspath Amphibole." Ann. de 1'Inst. Polytech. Pierre le Grand. St Petersbourg, 15:559-76, 1911. striking similarities and a few differences. The similarities need not be touched upon. It is the latter that are important. The interpretation of para-schists and para-gneisses should be guided by mental reference to the original unmetamorphosed rock. What kind of a sediment did we have in the beginning? Gushing suggests a calcareous shale.1 Now as the first point in our examination it is...
Page 61 - Pond mountain is probable an anticline (see section, figure 11), while the south side of the hill is a syncline, both strongly pitching westward. These folds have been truncated by erosion, so the line 1 The term arkose is the " special name for a sandstone rich in feldspar fragments, as distinguished from the more common, richly quartzose varieties.
Page 147 - ... freely escape, graphite deposits would probably be formed. Any magma which contains sufficient water, on coming into contact with bituminous or carbonaceous shales or slates, may be expected to convert all that portion of the carbon which is heated above about 600 C. to the oxide state through the agency of the water. The resulting gaseous hydrogen and oxides of carbon, being soluble in water and silicate solutions under pressure, may be expected to move about with, and as freely as, the magmatic...
Page 79 - Bui. 102, p. 76. rich in pyrite. The rock owes its foliated structure to subparallel arrangement of the graphite and the biotite flakes. The graphite flakes in the thin section studied vary from 0.02 millimeter to 0.015 millimeter wide and range up to 0.9 millimeter in length. The average length is not over 0.5 millimeter. " The mill of this company was situated at the quarry, but at the time of the writer's [Bastin] visit had not been, running for many years.
Page 52 - ... based upon an enlargement of an old forestry map. The early workings are located about a mile southwest of the mill of the American Graphite Company and consist of a short drift driven into the face of a cliff exposed in a natural ravine (just northeast of the diabase dike, which is shown on the map) N 75 E (magnetic) for 50 feet, then turning a right angle to N 15 W for 45 feet more. The ore and associated rocks here strike N 50 E and dip 20 to the southeast.2 The roof of the drift is...
Page 141 - He summarized them as follows: "(i) in the highly quartzose, nonfeldspathic character of most of the graphitic rock : (2) in the evenly and highly garnetiferous character of much of the wall rock [the Hague gneiss] ; (3) in the persistence of the graphitic schists and associated garnetiferous gneisses with fairly uniform trend, width and character for considerable distances ; (4) in the presence locally of interbedded masses of crystalline 1 Ingalls, WR, The Mineral Industry. 1908, 17:493. >Cirkel,...
Page 78 - A thin section of the typical ore when examined under the microscope shows quartz as the most abundant mineral with sharply bounded . . . [sericite] aggregates, which . . . represent altered feldspar grains and abundant brown biotite. Associated with the last and for the most part interleaved with it occurs the graphite, which according to an analysis made in the laboratory of the United States Geological Survey, constitutes 5.29 per cent of the rock. The sample analyzed was a composite one collected...
Page 17 - ... The mine, located on the northern slope of a low ridge overlooking a swamp, was opened about 1907 and has lain idle since 1910. Workings. The workings consist of four inclined shafts nearly in line (three abandoned and one recently worked). The dip of the rocks and hence of the shafts is 55- 60 southward. The main shaft is reported to be 72 feet deep " from which the miners have drifted eastward along the ore bed, removing a considerable amount of ore by stopping and finally reaching the...

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