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Geophysical Abstracts 136-139 January-December 1949 (Numbers 10737-11678)

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Geophysical Abstracts 136-139 January-December 1949 (Numbers 10737-11678) Geophysical Abstracts 136-139 January-December 1949 (Numbers 10737-11678) Abstracts of world literature t contained in periodicals, books, and patents OHIO GEOLOGICAL SURVEY UNITED STATES DEPARTMENT OF THE INTERIOR Oscar L. Chapman, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director \ « For sale by the Superintendent of Documents, U. S._ Government Printing Office Washington 25, D. C. - Price 5 cents (paper cover) CONTENTS [The letters in parentheses are those used]to designate the chapters for separate publication] Page <A) Geophysical Abstracts 136, January-March 1949 (nos. 10737-11001). 1 <B) Geophysical Abstracts 137, April-June 1949 (nos. 11002-11201__ 95 <C) Geophysical Abstracts 138, July-September 1949 (nos. 11202-11441). 167 (D) Geophysical Abstracts 139, October-December, 1949 (nos. 11442- 11678....._________________________________________________ 253 Under Departmental orders, Geophysical Abstracts have been published at different times by the Bureau of Mines or the Geological Survey as noted below: 1-86, May 1929-June 1936, Bureau of Mines, Information Circulars. [Mimeo­ graphed.] 87, July-December 1937, Geological Survey, Bulletin 887. 88-91, January-December 1937, Geological Survey, Bulletin 895. 92-95, January-December 1938, Geological Survey Bulletin 909. 96-99, January-December 1939, Geological Survey, Bulletin 915. 100-103, January-December 1940, Geological Survey, Bulletin 925. 104-107, January-December 1941, Geological Survey, Bulletin 932. 108-111, January-December 1942, Geological Survey, Bulletin 939. 112-127, January 1943-December 1946, Bureau of Mines, Information Circulars. [Mimeographed.] 128-131, January-December 1947, Geological Survey, Bulletin 957. 132-135, January-December 1948, Geological Survey, Bulletin 959. in Geophysical Abstracts 136 January-March 1949 (Numbers 10737-11001) By V. L. SKITSKY and S. T. VESSELOWSKY GEOLOGICAL SURVEY BULLETIN 966-A Abstracts of world literature - contained in periodicals, books, and patents UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1949 OHIO GEOLOGICAL SURVEY UNITED STATES DEPARTMENT OF THE INTERIOR J. A. Krug, Secretary GEOLOGICAL SURVEY W. E. Wrather. Director For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. - Price 25 cents CONTENTS Pagt Foreword...________-____-___-__-____-----_-_.__..--____--_--_-_--_ 1 0. General geophysical subjects._____________________________-_-__« 3 1. Gravitational methods____________________.____.______.__._..__. 6 2. Magnetic methods--_--_----_-_-_------_-----_-----_---_------_ 13 3. Seismic methods._-____--______-___-.___--_-__-__-_--__.____-.. 28 4; Electrical methods._-___-_-___________-_-_____-_-___-__._._____ 46 5. Radioactive methods.__________________________________________ 51 6. Geothermal methods___-____________-_.___.___-__.__-_.._.._._. 55 7. Geochemical methods__--____-____----_---_---_-_-__-___------ 57 8. Drill-hole methods.-.--.--_---..--.--_-.--._-.----..__------- 59 9. Unclassified geophysical subjects.________________________________ 63 10. Related geological subjects ________..________._________.___--_._. 68 11. Technical aids to exploration._--__.._-___--_-__-__________-.--.- 73 12. Patents.------_-------___--_----------------------_-----_----- 77 Index...-_-_.---------__-.--_----_--_----_--------------..-_----_ 91 NOTE. For a greater differentiation of contents section 8 of previous reports is replaced by section 0 and section 9, and the former section 9 is replaced by section 10 and section 11. An additional section on drill-hole methods, section 8, is introduced. A double dagger (t) after an entry indicates that the publica­ tion was reproduced by other means than ordinary printing. m 4 4- GEOPHYSICAL ABSTRACTS 136, JANUARY-MARCH 1949 By V. L. SKITSKY and S. T. VESSELOWSKY FOEEWOED Geophysical Abstracts' are issued by the Geophysics Branch of the Geological Survey, United States Department of the Interior, as an aid to those engaged in geophysical research and exploration. The publication covers world literature oil geophysics contained in periodi­ cals, books, and patents. It deals with exploration by gravitational, magnetic, seismic, electrical, radioactive, geothermal, geochemical, and drill-hole methods, and with underlying geophysical theory, research, and related subjects. Inasmuch as geophysicists in the field may have little opportunity to consult libraries, the policy is to provide abstracts sufficiently in­ formative in themselves to keep readers abreast of developments in the United States and abroad. Distribution. Geophysical Abstracts 1-86 were issued as Informa­ tion Circulars by the Bureau of Mines; 87-111 were issued as Bulletins of the Geological Survey; and 112-127 were issued as Information Circulars by the Bureau of Mines. Beginning with 128, Geophysical Abstracts are published as Bulletins of the Geological Survey. As long as available, Geophysical Abstracts issued as Information Circulars may be obtained free of charge from Publications Distribu­ tion Section, Bureau of Mines. Geophysical Abstracts issued as Bul­ letins of the Geological Survey may be purchased as single copies or by subscription from the Superintendent of Documents, Government Printing Office, Washington 25, D. C. For subscription, the Superin­ tendent of Documents will accept a deposit of $5 in payment for sub­ sequent issues. When this fund is near depletion, the subscriber will be notified. The deposit may also be used to cover purchase of any other publication from the Superintendent of Documents. Author's reprints. The Geological Survey will appreciate receiv­ ing reprints of publications and patent specifications from authors and inventors. These will be filed for reference after being abstracted. In reproducing authors' abstracts the Geological Survey reserves the right to make minor changes in accordance with its editorial policy. 2 GEOPHYSICAL ABSTRACTS 136, JANUARY-MARCH 1949 All reprints and correspondence other than orders for copies of Geo­ physical Abstracts should be addressed to the Director, Geological Survey, United States Department of the Interior, Washington 25, D.C, . -..- Acknowledgements. Grateful acknowledgement is made of the adviG^and assistance Received, frdm various :sections/of-the Geologieal. Survey. ... , 0. GENERAL GEOPHYSICAL SUBJECTS 10737. Alvarez, Manuel. Los metodos geofisicos [Geophysical methods]: Petroleos Mexicanos, no. 62, pp. 27-29, Mexico City, 1948. Geophysical prospecting probably had its beginning in the year 1640, when the magnetic compass was used for the first time to locate iron deposits in Sweden. Geomagnetic prospecting received a powerful impetus when a field magnetometer was built by Schmidt in 1915. A similar instrument was used for the first time in Mexico in 1926 for the exploration of the Furbero iron deposits. The electric method of prospecting for nonmagnetic metals was first employed by C. Schlum- berger in 1913 in Bor, Yugoslavia, but because of the First World War, the results of his pioneering work did not become known until 1920. This method was first applied in Mexico in 1925 to the exploration of the ore deposits in the Pachuca region. What is now known as the seismic method of exploration was sug­ gested in 1849 by Robert Mallet in a paper presented before the Royal Irish Academy. It was used first in Mexico in 1923. Baron von Eotvos was the first to -apply the gravitational method to the study of subsoil when in 18S8, he constructed torsion balance. In Mexico it was first used in 1922. Some years later the gravimeter, which is now the generally adopted instrument for gravitational pros­ pecting, was introduced. 8. T. V. 10788. Armstrong, L. C., and Davidson, D. M. The practical view in geophysical exploration for metallic ores [abstract]: Geophysics, vol. 13, no. 3, p. 506, Tulsa, Okla., 1948. The biggest hurdles to overcome before geophysics can reach a fuller measure of its true potentialities in ore finding are: first, the develop­ ment of techniques for .mitigating or eliminating the anomalous effects of overburden; second, development of methods for detection of dis­ seminated metallic sulfide deposits; third, perfection of techniques for investigating the rocks surrounding bore holes for an appreciable dis- tance; fourth, the improvement of techniques for geophysical prospect­ ing underground; fifth, preliminary consultation on the chances of a survey's success, and checks of its results by the repetition of traverses and readings; sixth, reduction in costs for all methods; and seventh, modification and improvement in efliciency of equipment with special attention to increasing the depth range. Finally, there is a critical need for research both long-range indirect fundamental research and direct research on known ore deposits which have not been disturbed too much by development or mining. This latter research will be most profitably carried out if undertaken by private mining companies on their own properties with the cooperation of their geological staffs. Condensed ly V. 8. 4 GEOPHYSICAL ABSTRACTS 136, JANUARY-MARCH 1949 10739. Bartels, Julius, and others. Geophysics, part 1, 237 pp., Office of Military Government for Germany, Wiesbaden, Germany, 1948. The Military Government of the British, French, and United States zones of Germany present this volume of the review of German science 1939-46 with the hope that it will assist in informing scientists of re­ search done in Germany during the war years. This special volume is devoted to geophysics, and consists of the
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