Ore Deposits a Discussion Re Published From the Engineering And Mining Journal
Ore Deposits a Discussion Re Published From the Engineering And Mining Journal
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Inasmuch, however, as it has been found that the structural difference is one of impor- tance, I have separated this type and used the term 'bed replacement' as equivalent to the 'strike deposit' of Beck. The individual types given under each heading are based upon mineralogical distinctions, which are the result of chemical differences in the mineralizing vapors and ac- W. H. WEED, corded, therefore, with ores of different character.
Pneumatolytic Veins. The second class in the group of igneou...s emanation deposits are veins in which the fissure has simply been the channel for the vapors, and in which the impregnation of the country rock on each side of the fissure is essentially characteristic. Pegmatite veins have been recognized as of this general character, and the close relationship between pegmatites and the cassiterite veins of Cornwall is quite well known. To this I would add the veins characterized by tourmaline and copper, and those characterized by gold, pyrite and tourmaline.
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To quickly assess the difficulty of the text, read a short excerpt:
Inasmuch, however, as it has been found that the structural difference is one of impor- tance, I have separated this type and used the term 'bed replacement' as equivalent to the 'strike deposit' of Beck. The individual types given under each heading are based upon mineralogical distinctions, which are the result of chemical differences in the mineralizing vapors and ac- W. H. WEED, corded, therefore, with ores of different character.
Pneumatolytic Veins. The second class in the group of igneou...s emanation deposits are veins in which the fissure has simply been the channel for the vapors, and in which the impregnation of the country rock on each side of the fissure is essentially characteristic. Pegmatite veins have been recognized as of this general character, and the close relationship between pegmatites and the cassiterite veins of Cornwall is quite well known. To this I would add the veins characterized by tourmaline and copper, and those characterized by gold, pyrite and tourmaline.
What to read after Ore Deposits a Discussion Re Published From the Engineering And Mining Journal?
You can find similar books in the "Read Also" column, or choose other free books by T a Thomas Arthur Rickard to read onlineMoreLess
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