Ecogeochemical exploration of noosphere in light of ideas of V.I. Vernadsky

• noosphere is treated as a spatially organized object of ecogeochemical exploration.
• noosphere is presented as a two-layer structure of natural and technogenic origin.
• ecogeochemical health risks depend upon overlay and combined effect of both layers.
• spatial organization of noosphere allows improvement of its mathematical analysis.

The main goal of the study is to show theoretical and practical significance of fundamental biogeochemical ideas of V.I. Vernadsky for a study of geochemical structure of noosphere as a modern stage of biosphere and their basic importance for ecogeochemical exploration. Three phases of the noosphere development followed by a corresponding change in geochemical structure of biosphere and spatial distribution of the endemic diseases are believed to be separated. Peculiarity of spatial distribution of biological reactions as a respond to the existing and newly formed geochemical heterogeneity may be demonstrated on example of thyroid diseases in the Chernobyl impact zones.