A Text book of Mining Geology for the Use of Mining Students And Miners
The book A Text book of Mining Geology for the Use of Mining Students And Miners was written by author James Park Here you can read free online of A Text book of Mining Geology for the Use of Mining Students And Miners book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text book of Mining Geology for the Use of Mining Students And Miners a good or bad book?
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133 and may be either intergrown, or inetasomatic replacements, or the result of interstitial filling with partial replacement. The conversion to garnet-epidote-calcite, etc. , rock was complete before the consolidation of the igneous rock. The ore-minerals were introduced in gases and vapours solfataric emanations from the eruptive masses, of which they constitute pneumatolytic after-actions, or by hot circulating waters given off by the cooling igneous mass. This theory of the genesis being t...rue, the deposits should extend downward in depth to the granular rock. " Professor Kemp, of New York, in a valuable paper on "The Role of Igneous Rocks in the Formation of Veins, " l maintains that the circulation of ground-water is insufficient to account for the majority of the ore-deposits in the United States. He supports the petrological view, that igneous rocks must have furnished not- only the metallic contents, but a large proportion of the waters which brought the metals into their present position.
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