Variation diagram mixing

Most trends on variation diagrams are the result of mixing. In igneous rocks the mixing may be that of two magmas, the addition and/or subtraction of solid phases during contamination or fractional crystallization, or mixing due to the addition of... 

Mixing in Banded gneisses from the Archaean Lewisian complex of northwest Scotland show metamorphic linear trends on major element variation diagrams. There are two possible... 

A computer- There are a number of computer programs which can be used to interpret trends on based approach variation diagrams and to solve mixing problems of the type described above. to mixing Fractional crystallization, for instance, may be expressed as ... 

Fig. 8.14 These silica variation diagrams support the conjecture that the Serpan Gneiss formed as a border facies of the magma of the Serpan Granite that was contaminated by assimilating rocks of the Patuxent Formation. Consequently, these bodies of plutonic igneous rocks have the same age but different Rb/Sr ratios. A straight line fitted to these samples in a Rb-Sr isochron diagram is a mixing line that cannot be used to calculate the age of these rocks. The chemical analyses of these rocks were provided by D.L. Schmidt to Eastin (1970)...

Fig. 1 shows the block diagram of the vibrometer, in which the most sensible to small phase variations interferometric scheme is employed. It consists of the microwave and the display units. The display unit consists of the power supply 1, controller 2 of the phase modulator 3, microprocessor unit 9 and low-frequency amplifier 10. The microwave unit contains the electromechanical phase modulator 3, a solid-state microwave oscillator 4, an attenuator 5, a bidirectional coupler 6, a horn antenna 7 and a microwave detector 11. The horn antenna is used for transmitting the microwave and receiving the reflected signal, which is mixed with the reference signal in the bidirectional coupler. In the reference channel the electromechanical phase modulator is used to provide automatic calibration of the instrument. To adjust the antenna beam to the object under test, the microwave unit is placed on the platform which can be shifted in vertical and horizontal planes. 

Phase-composition diagrams may also be plotted for mixtures of optically pure samples that are structurally similar, but not identical. Such plots have been employed frequently as an empirical correlation to absolute configuration, which is referred to as the method of quasiracemates. The details, variations, limitations, and numerous examples of this method have been presented by others (33). We merely note here that if a phase-composition diagram of the racemic compound type were obtained for a particular pair of enantiomers having known configuration, and if the phase-composition diagram of mix-... 

T-S diagrams based on ocean data typically exhibit curvature. Causes for this nonlinearity include (1) mixing of more than two end members (Figure 4.18e), (2) temporal variations in environmental conditions during fiarmation of the end members, and (3)... 

However, if the trend of variation of In S with composition is extrapolated (dashed lines in Fig. 16), it is found that the two lines starting from pure anionic and pure cationic, cross exactly at an equimolar mixture composition. It may be said that on the left side of the diagram (more anionic than cationic) there is a linear mixing rule between the pme anionic and the equimolar compound, whereas in the right part of the diagram the Unear mixing rule is between the cationic and the equimolar compoimd [85,86]. 

Fig. 1. Phase diagram of mixed PVPC6 + L monolayers. Variation of PVPC6 collapse pressure with segment fraction of lipid xL.

The cell diagrammed in Figure 29.20c has been used extensively by Kastening to study the reaction mechanisms and kinetics when a stable electro-chemically generated species is mixed with other reactants [38]. The calculations that were used to reduce the experimental data to kinetic parameters included the effects of flow rate, reaction mechanism, rate constant, and the dependence of the EPR spectrometer nonuniform sensitivity to the position of the radicals in the cavity. Unfortunately, the correction for the latter effect was introduced as the idealized cosine-squared function (solid line in Fig. 29.16) rather than the actual sensitivity variation that occurs with magnetic field modulation. It is important to be aware of this difficulty when performing experiments to determine accurate kinetic parameters. 

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