 | Science - 1899 - 1030 pages
...little found, and where we find the large deposits of the corundum there is a scarcity of chromite. This constant occurrence of the chromite in rounded masses...near the contact of the peridotite with the gneiss, its occurrence in the fresh as well as in the altered peridotite, indicate that the chromite has been... | |
 | Joseph Hyde Pratt - Corundum - 1901 - 758 pages
...origin of the corundum in the peridotite rocks, and have accepted the theory that the corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool it was among the first minerals to separate. In these molten magmas the more... | |
 | Mineral industries - 1908 - 1172 pages
...constant occurrence of the chromite in rounded masses of varying size near the contact of the periclotite with the gneiss, and its occurrence in the fresh, as well as in the altered peridotite, would indicate that the chromite was held in solution in the molten mass... | |
 | Geological Survey (U.S.) - Geology - 1910 - 694 pages
...abundant near the contact and diminish in number toward the center of the mass of peridotite. * * * The constant occurrence of the chromite in rounded...and that it separated out among the first minerals aa this mass began to cool. As has been said, the peridotite (dunitc) magma, holding in solution the... | |
 | Alfred Ernest Barlow - Corundum - 1915 - 560 pages
...of corundum in the United States says: "The theory advanced in this paper is that the corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool, it was among the first minerals to separate. In these molten magmas, the... | |
 | Corundum - 1915 - 736 pages
...of corundum in the United States says: "The theory advanced in this paper is that the corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool, it was among the first minerals to separate. In these molten magmas, the... | |
 | Canada. Mines Branch (1950- ) - 1927 - 80 pages
...of India, 2nd Ed., pt. I, pp. 7-79 (1898). United States According to JH Pratt:— The corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool, it was among the first minerals to separate. In these molten magmas, the... | |
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The constant occurrence of the chromite in rounded masses of varying proportions near the contact of the peridotite with the gneiss, and its occurrence in the fresh as well as the altered peridotite, indicate that the chromite has been held in solution... 