"The need for a technique for making torsion balance surveys of inundated areas was brought to the writer's attention during the years of 1927 to 1933, while employed by The Sinclair Exploration Company to prospect for oil in Austria, Hungary and North and Northwest Germany. At that time, the company was using ten torsion balances, supplementing the work with magnetometer surveys and refraction seismograph detail. During part of this period an elementary and relatively insensitive gravimeter was used. Some reflection seismograph work was also done during the last year of operations. During the course of surveying in North and Northwest Germany, many inundated areas were encountered on which it was impossible to obtain geophysical data. Adjacent to one of these areas, the Zwischaner Meer, the direction and intensity of the gravity measurements suggested that a salt dome type of structure might exist within the inundated area.

No method for making geophysical surveys of such inundated areas was then known in Germany. While some measurements of gravity had been made under water by using a pendulum in a submarine, such a procedure was not applicable to the relatively shallow bodies of water in which we then were interested. Therefore, it was decided that if a practical method of making torsion balance surveys of water covered areas could be developed, such a technique would add considerably to the territory available for oil exploration"--Introduction, page 1.


Forrester, James Donald, 1906-1979


Mining Engineering

Degree Name

Professional Degree in Mining Engineering


Missouri School of Mines and Metallurgy

Publication Date



v, 45 leaves

Note about bibliography

Includes bibliographical references (page 37).


© 1945 K. F. Hasselmann, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Torsion balances
Geophysical surveys
Prospecting -- Geophysical methods

Thesis Number

T 741

Print OCLC #


Electronic OCLC #


Hasselmann_KF_1945_Plate_1.tif (4072 kB)
Map of Cedar Point Area showing gravity gradient and curvature values

Hasselmann_KF_1945_Plate_2.tif (6882 kB)
Map of Cedar Point Area showing isogam contours superimposed upon gradient and curvature valu

Hasselmann_KF_1945_Plate_3.tif (7428 kB)
Map of Cedar Point Area showing structure as delineated by the reflection seismograph superimposed upon gradient and curvature values and isogam contours

Hasselmann_KF_1945_Plate_4.tif (5004 kB)
Map of Cedar Point Area showing contours on top of the Frio sand superimposed on gradient and curvature values and isogam contours

Hasselmann_KF_1945_Plate_5.tif (4145 kB)
Profile of land and water taken data for comparison