THE NEAR ORDER IN ORIENTATION OF BIOTITE IN THE CHUPA GNEISSES (NORTHERN KARELIA). GEOSTATISTICAL APPROACH
In research 43 samples from which 128 sections have been investigated. In section 30 grains of biotite are investigated orientation of cleavage approximately, thus all the information on orientation of 3800 crystals of biotite is used. The empirical semivariogram of orientations from 8 points (rings of the neighbourhood) is constructed. The semivariogram has typical character, a sill and range equal 6. Thus, it shows presence of the short range order in orientation of biotite from the first up to the sixth ring. It is carried out bidimentional computer modelling of a field of orientations with short range ordering spectral turning bands method. On model visual differences of distribution of orientations without short range ordering are shown and at presence of those.