variation diagram

variation diagram

[‚ver·ē′ā·shən ‚dī·ə‚gram]
(petrology)
A diagram constructed by plotting the chemical compositions of rocks in an igneous rock series in order to show the genetic relationships and the nature of the processes that have affected the series. Also known as Harker diagram.
References in periodicals archive ?
The traction tests at room temperature and under cryogenic conditions were performed on a universal testing machine INSTRON 1196 that is equipped with an automatic system for recording the load variation diagram, as an electrical sensing device measures the load.
For the two models mentioned in step 1 with different densities of elements, the variation diagrams are given in the fig.
With the values obtained for all the points of contact are represented the variation diagrams during the meshing cycle.
Generalizations on processes can be made from variation diagrams showing representatives of the three magma series (Fig.
1, 2) are represented the variation diagrams of mechanical parameters, diagrams obtained in the mechanical testing conditions mentioned above for case of test no.
Using all these results the variation diagrams of the measured or calculated cutting efforts versus the cutting speed and feed were drown.
The 3D variation diagrams of the effective power Pe, effective specific fuel consumption Ce and nitric oxides emission NOx in terms of two distribution phase moments, obtained by de-fuzzy-ing the functions by means of MATLAB[R] program, are shown in the next figure.