Preliminary analysis of some chemically determined data from the compressive fault zone at Dayu,Jiangxi province

Discussed in this paper are the relationship between the compressive fault zone and mineralization, and the regularities governing the concentration-dispersion of elements in the compressive fault zone based on chemically determined data from field and laboratory studies of megascopic structures and tectonites. Horizontal zoning has been recognized in the compressive fault zone, with four distinct belts from the centre outwards. Four groups of chemical components in these four belts are distinguished: the first group-SiO₂, FeO, MgO and MnO; the second-Fe₂O₃, Na₂O and K₂O; the third-CaO and A1₂O₃; and the fourth-TiO₂ and P₂O₅ Furthermore, various tectono-geochemical processes (including dynamic differentiation or mechanical metamorphic differentiation, dynamothermal metamorphism, oxidation-reduction, and hydrolysis-dewatering) in the fault zone are also discussed in detail.