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nydus/The Economic Aspect of GeologyPublic
Page 351 of 360
Table of Contents

Notes

THE COMMON ELEMENTS, MINERALS, AND ROCKS OF THE EARTH AND THEIR ORIGINS

1

Clarke, F. W., Data of geochemistry: Bull. 695, U. S. Geol. Survey, 1920, p. 35.

2

Clarke, F. W., Data of geochemistry: Bull. 695, U. S. Geol. Survey, 1920, p. 33.

3

Clarke, F. W., Data of geochemistry: Bull. 695, U. S. Geol. Survey, 1920, pp. 22-23.

SOME SALIENT FEATURES OF THE GEOLOGY AND CLASSIFICATION OF MINERAL DEPOSITS

1

Ransome, Frederick Leslie, Copper deposits near Superior, Arizona: Bull. 540, U. S. Geol. Survey, 1914, pp. 152-153; The copper deposits of Ray and Miami, Arizona: Prof. Paper 115, U. S. Geol. Survey, 1919, p. 156; Discussion: Econ. Geol., vol. 8, 1913, p. 721.

2

For more specific definitions of vertical zones of ore deposition in association with igneous rocks see Spurr, J. E., Theory of ore deposition: Econ. Geol., vol. 7, 1912, pp. 489-490; Lindgren, W., Mineral deposits, McGraw-Hill Book Co., 2d ed., 1919, Chapters XXIV-XXVI; and Emmons, W. H., The principles of economic geology, McGraw-Hill Book Co., 1918, Chapters VI-VIII. An excellent discussion of a case of vertical and areal zoning of minerals is contained in Ore deposits of the Boulder batholith of Montana, by Paul Billingsley and J. A. Grimes, Bull. Am. Inst. Min. Engrs., vol. 58, 1918, pp. 284-368.

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