Reflection of magmatism and tectonics in the geophysical fields of the southwestern Primorye
The results of a comprehensive interpretation of geophysical fields (magnetic, gravity and radioactivity) of the South-Western Primorye (Khasansky district) are presented. The authors give schemes reflecting the relationship of geophysical fields with various surface and deep geological structures, and discontinuous disturbances of various orders. The deep boundaries of the local granitoids massifs of the Jurassic age emerging on the surface are determined. The distribution areas of Cenozoic magmatism are outlined. The anomalous zone of increased values of the radioactive field, associated with the introduction of magmatic bodies with a high content of potassium, was identified. An assumption is made about the existence of a long-lived fluid-permeable zone that controls magmatic processes in the region.