THE STUDY OF METALLOTECTONIC THEORY
Zhang Xiangbing (Changsha Institute of Geotectonics, Acadimia Sinica)
After dealing briefly with the development of the concept of meta llotectonies, the paper discusses preliminarily deep-seated structure, tectonic-geochemistry of metallotectonics, and application of the symme tric theory to metallotectonics. The author consider:A) The study of deep-seated structure(geophysic field)is one of the basic contents of metallotectonics. Through study of geophysic features, we can get data on the structure of the crust, the features of vertical or lateral variation of every layer, undulate variation of Moho disconti nuity, structural variation of areas between continental crust and oce anic crust, etc. On the basis of the data, metallogenic regularities are analysed, and mineral deposits are prognosticated. B) The study of tectonic-geochemistry is a key to metallotectonics. The formation of ore-forming elements geochemical anomalies is not only closely related tp the fractional development stages and produc tions of tectonic-geochemistry of the crust but also controlled by de velopment features which they were undergone after their formation.C) In the last years, application of the symmetric theory to metallo tectonics is further progessive. Many scientists of our country and other countries have applied the theory to metallotectonics of different scales and types, and have achieved some successes in metallogenic progno stication and prospecting. The equidistances of metallogenic structures may be divided into three types: concentric equidistance, en echelon equidistance, parallel equidistance. Their formation mechanism may be related to spreading manner of stress wave.