The Principles and Practice of Geophysical Prospecting: Being the Report of the Imperial Geophysical Experimental Survey
A. B. Broughton Edge, T. H. Laby
Cambridge University Press, Mar 29, 2012 - Science - 404 pages
Originally published in 1931, this book contains the report of the Imperial Geophysical Experimental Survey regarding an extended field study carried out in various parts of Australia from 1928 to 1930. The aim of the study was to test the applicability of geophysical methods in a range of conditions which were seen as representative of different parts of the British Empire. Electrical, gravimetric, magnetic and, to a limited extent, seismic methods were examined in areas containing sulphide and other ores, brown coal, graphite and saline waters. The text contains an account of the study, together with numerous illustrative figures and a detailed index, it will be of value to anyone with an interest in the development of geophysics.
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CHAPTERIX MAGNETIC METHODS
PR1NcIP1 Es AND APPLICATIONS
PROPAGATION OF SEISMIC DISTURBANCES
MAP OF AUSTRALIA
CHAPTERIII ELECTRICAL SURVEYS IN AUSTRALIA
known sulphide lodes at Leadville N S
A.C. potential ratio alternating current apparatus Australia axis basalt beam bed-rock bore bore-hole cable calculated carried clay coal coil conductive body conductive zones conductor copper country rock curves deﬁned deﬁnite deﬂection depth determined direct current direction distance district dyke earth’s effect electrical methods electrodes electromagnetic ellipse equipotential line survey equipotential surfaces explosion ﬁgure ﬁrst ﬁxed ﬂat ﬂow formations frequency Gelliondale geological geophysical Gish and Rooney gossan gradients gradiometer graphite gravimetric gravity ground Gulgong horizontal component indication induction instrument investigations located lode loop magnetic anomalies magnetic ﬁeld magnetite magnetometer measured mineral Mines Moonta observed ohm cm ore-bodies out-of-phase overburden plane position potential ratio method potentiometer primary ﬁeld proﬁles prospecting pyrites pyrrhotite recorded Renison Bell resistivity secondary ﬁeld seismic seismometer shown in Fig spontaneous polarization stations suﬂicient sulphide Tasmania tests torsion balance traverse velocity wave wire