# Oklahoma City Geological Society

Abstract

The Shale Shaker Digest II, Volumes VI-VIII (1955-1958)
Pages 188-188

# Component Dip Nomogram

## ABSTRACT

The determination of the magnitude and direction of component dip from the magnitude and direction of the true dip by means of a circular nomogram.

When the magnitude and direction of a true dip of a plane are given the magnitude of the component dip in a vertical plane in any direction may be very conveniently solved for routine work by means of a circular nomogram.

Let ( ) be the true dip and (  ) the component of the true dip in a direction which makes an angle (o) with the direction of the true dip; then it is well known that: (1)

or, (2)

or, if (m) is a scale factor the constructional determinant for the nomogram may be written: (3)

Let: (4)

and (5)

then, eliminating (Tan ) between these two equations, it is found that: (6)

which is the equation to a circle passing through the origin whose radius is equal to (m). Thus, the scale for the true dip ( ) is therefore the upper half of the circumference of a circle of radius (m); similarly, the scale for the direction (O) is the lower half of the circumference of the same circle, and the scale for the component dip (  ) is the diameter of this circle separating the ( ) and (O) scales.

The completed nomogram is shown in , together with an example from which it is seen that by a straight line alignment of the scales that when (O) = 36 degrees and ( ) = 30 degrees, the component dip (  ) = 25 degrees.

COMPONENT DIP NOMOGRAM

End_of_Record - Last_Page 188-------

## Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.