At ore deposits the EGFs are responsible for supply and redistribution of elements through the entire ore formation process. The fields were divided into EGF of poor concentration (contrast coefficient CC normalized after background to 10), mean (CC >10-100), and intense (CC >> 100). The EGF intensity progressively increases at the hierarchy stage: 鈥渉ost rock鈥攑re-ore metasomatite鈥攕yn-ore hydrothermalite鈥攐re body鈥攐re pillar鈥?
To summarize, the fields, ore districts, zones, and deposits are characterized by diverse patterns of dispersion, concentration, and removal.
The specific features of composition, structure, and zonal distribution of elements in geochemical fields are exemplified by some gold-bearing zones of the Trans-Baikal region. The paper reports new approaches to investigating these natural formations. The authors promote transition from the generally accepted evaluation of a halo separation to the volumetric survey of endogenous geochemical fields (GFD, GFC, and GFR included) of ore deposits and ore-magmatic systems, in general. The acquired evidence supports the assumption that endogenous geochemical fields should be regarded as a complete system differentiated in space and time preserving specifics and pattern of the internal structure.