REPORT ON THE GEOLOGY OF THE BRADEN MINE, RANCAGUA, CHILE.

[Chile]. Bastin, Edson S.

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N.p.: 1917. Typescript of 79 pages. Illustrated with maps, cyanotypes, and a mounted photograph. 11 x 8 inches. Worn boards, crudely rebacked. Presentation inscriptions in ink from R. P. Carr, Rio Blanco, Chile, 1926 and to Thomas A. McBride in 1938. (Item ID: 2872)


Edson Sunderland Bastin was born on December 10, 1878 in Chicago. He received an A.B. from the University of Michigan (1902), and a Ph.D (1909) from the University of Chicago. A Member of the United States Geological Survey from 1904 to 1919, Bastin surveyed Maine, western mining districts, copper properties, and parts of Chile. From 1918 to 1919 he served as chief in the division of mineral resources for the U.S.G.S.
Bastin joined the faculty of University of Chicago in 1919. From 1922 to 1944 he was the chairman of the department of geology and paleontology. Bastin became a prominent geologist, during the 1920s when his research on groundwater from oil fields first showed that microorganisms live deep in the subsurface. He died in 1953.
"The Braden Mine seems to be the unique example of a copper deposit laying in and about an explosive volcanic crater... it probably furnishes the most striking evidence on record of the intimate connection in origin between certain mineralizing solutions and bodies of igneous rock..."



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