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Geophysical Abstracts 135 October-December 1948 (Numbers 10473-10736)

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Geophysical Abstracts 135 October-December 1948 (Numbers 10473-10736) UNITED STATES DEPARTMENT OF THE INTERIOR J. A. Krug, Secretary GEOLOGICAL SURVEY W. E. Wrather. Director Bulletin 959-D GEOPHYSICAL ABSTRACTS 135 OCTOBER-DECEMBER 1948 (NUMBERS 10473-10736) BY V. L. SKITSKY AND S. T. VESSELOWSKY UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1949 for eale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C< Price 25 cents CONTENTS Page Foreword ______-__-___-_____--__---_-----_--_---_--__-_--.__---_-_ 263 0. General geophysical subjects------------------------------------ 264 1. Gravitational methods________-__-_-______-_____-------_-__--_ 266 2. Magnetic methods--------.-.---------------------------------- 273 3. Seismic methods___---_____-_-----_---_--_-_____------_-____-__ 288 4. Electrical methods..-..____--_-_-______________-__--_-_._-___._. 304 5. Radioactive methods__---_-_-__------_..--_---_-___--__-----_,-_ 310 6. Geothermal methods_____-_____--______-__-__-_______-_-______ 313 7. Geochemical methods_________________________________________ 315 8. Drill-hole methods--------.-----------------------------------. 318 9. Unclassified geophysical subjects----.-----.----------------^_---_ 322 10. Related geological subjects.____.-___.________-_-_-_____.__--__-- 328 11. Technical aids to exploration_-__----_____-__--------_---------_. 335 12. Patents_-__.____.._..__-- _.-._ __. .._-..._- 340 Index to Geophysical Abstracts 135, October-December 1948 __-___-_- 357 Index to Geophysical Abstracts 132-135, January-December 1948-___._ 361 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 sec­ tion 10 and section 11. An additional section on drill-hole methods, section 8, is introduced. GEOPHYSICAL ABSTRACTS 135, OCTOBER-DECEMBER 1948 By V. L. SKITSKY and S. T. VESSELOWSKY FOREWORD 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 on geophysics contained in period­ icals, books, and patents. It deals with exploration by gravitational, magnetic, seismic, electrical, radioactive, geothermal, and geo- chemical 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 Distri­ bution Section, Bureau of Mines. Geophysical Abstracts issued as Bulletins of the Geological Survey may be purchased as single copies or by subscription from the Superintendent of Documents, Govern­ ment Printing Office, Washington 25, D. C. For subscription, the Superintendent of Documents will accept a deposit of $5 in payment for subsequent issues. When this fund is near depletion, the sub­ scriber will be notified. The deposit may also be used to cover purchase of any other publication from the Superintendent of Docu­ ments. Author's reprints. The Geological Survey will appreciate receiving 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 263 264 GEOPHYSICAL ABSTRACTS 135, OCTOBER-DECEMBER 1948 right to make minor changes in accordance with its editorial policy. 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. Acknowledgments. Grateful acknowledgment is made of the advice and assistance received from various branches of the Geological Survey. 0. GENERAL GEOPHYSICAL SUBJECTS 10473. Bailey, S. W., and Anderson, R. E. Japanese geophysical research: U. S. Naval Technical Mission to Japan, Intelligence Targets Japan (DNI) of 4 Sept. 1945, Fasc. X-l, Target X-06, 24 pp., San Francisco, Calif., January 1946. (Library of Congress, OTS PB Kept. 31616.) During the war years 1939-45 Japanese geophysical research, formerly outstanding in seismology, was reduced in scope because of shortages of material and personnel, financial restrictions, and interference from bombings. Nevertheless, new seismograph designs and modifications of existing types of seismographs were developed both for observatory work and for prospecting. Also land mine detectors based on seismic principles were experimented with, known models of gravimeters were improved, and investigations were made for the forecasting of earth­ quakes from tilting and magnetic data. The work is outlined on the basis of interviews with 18 leading geo- physicists and the inspection of 9 geophysical institutions. Dominant views on the state of the earth's core, ISOStRSy, earth tides, ClUStal de­ formation, terrestrial ellipsoid, and forecasting of earthquakes are reported. Brief descriptions, diagrams, and photographs are given of M. Matsuzawa's duplex pendulum seismograph of new design for registration of strong earthquakes, K. Sassa's strain seismograph of the Benioff type for measuring wave velocities, K. Sassa's extension meter for recording horizontal displacement, T. Hagiwara's displace- ment seismograph with a calibration device of a new type, T. Hagiwarajs vertical motion seismograph with a rectangular suspension, C. Tsilboi S dock drive for seismometer drums, K. Sassa's seismographs of models B ana o ror proSp0^, e, K. s^»^.« OU^^^H of tte Schluter type for tilting iflVeStiigatiOnS; S. Nakamura's proposed land-mine detectors or anonmetallic and a seismic type, C. Tsubol's gravity pCndulUm, and M. Hasegava's gravity variometer. No new magnetic, electrical, radioactive, or thermal instruments are reported. V. S. 10474. Bubleinikov, F. Treasures of the earth, Cu. 9, pp. 136-152, MOSCOW, Molodaia Gvardiia, 1946. The elements of geopuyaicai ana good^ ^,^ ^^i^^uan Of ore deposits are explained in popular language to readers of high-school age who have little technical knowledge, with a view to encouraging their enrollment in courses preparatory to specialization in geology, geo- pnysica, ana goovfe^i.*^. ^,,wMm inoludes a B<meTa.,. baoicBroUnd of the geological history of the earth. V. 8. GENERAL GEOPHYSICAL SUBJECTS 265 10475. Lasky, S. G. Search for new mineral supplies Geophysical and geo- chemical methods: Hearings before a subcommittee of the Committee on Public Lands, U. S. Senate, 80th Cong., 1st sess., Investigation of National Resources, May 15, 16, and 20, 1947, pp. 198-200, Washing­ ton, D. C., 1947. Geophysical and geochemical methods are examined to help further the search for mineral resources. The purpose is to clarify their places among other exploratory methods and to indicate their potentialities, so as to aid particularly in discovering metals and minerals in which the United States is deficient. It is found that, among the geophysical approaches, the magnetic methods are successful in the search for naturally magnetic materials, such as ores of iron, titanium, and chro­ mium, and of nonmagnetic deposits associated with them. Gravity methods have application in the discovery of iron ore and chromite and also of lead and zinc under especially favorable conditions. Electri­ cal methods are useful in prospecting for sulfide ore bodies. Geo- thermal methods may be helpful in detecting ore bodies that generate or absorb heat in reactions with ground waters. Ultraviolet light has aided in finding scheelite and may be useful in the search for fluorescent zinc minerals. The relatively new geochemical methods invite investi­ gations as to their scope of application and objectives; some of their principal problems are listed. V. S. 10476. Lee, F. W. Economic evaluation of geophysical work: Hearings before a subcommittee of the Committee on Public Lands, U. S. Senate, 80th Cong., 1st sess., Investigation of National Resources, May 15, 16, and 20, 1947, pp. 151-157, Washington, D. C., 1947. To appraise the cost and profitableness of public projects for geophysi­ cal exploration of natural resources in the United States and its Terri­ tories, an economic evaluation is made of the past work of the Geo­ physical Division of the United States Bureau of Mines from its estab­ lishment in 1928 to November 1946, when geophysical activities were transferred to the United States Geological Survey. The account gives year-by-year descriptions of the investigations conducted and pre­ sents estimates of the dollar values produced by the resulting discovery of new oil pools, ore bodies, water supplies, and other resources. It includes also a statement on the reduction in the cost of drilling opera­ tions and engineering construction and the immediate benefits from advances in accessory research in geophysical sciences, instrumentation, and field techniques. The tabulation of data, summarizing the cost of Government exploration and the national
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