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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 32 (1948)

Issue: 2. (February)

First Page: 262

Last Page: 277

Title: Core Orientation by Graphical and Mathematical Methods

Author(s): Hugh McClellan (2)

Abstract:

This paper reviews mathematical, graphical, and mechanical methods for correcting the apparent dips in oriented cores for the effect of the angle of deflection of the bore hole. In addition the common case is treated in which the core is not oriented but instead a regional or local strike is assumed. By means of examples, this solution and previously published solutions for the case of an oriented core are reduced to a step-by-step routine with convenient charts and formulas serving as double checks on each other. It is pointed out that in the case of an unoriented core, when the strike is assumed, there are usually two possible values for the true dip, one of which must be selected on the basis of geological probability.

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