SOME CHARACTERISTICS OF CONTROL OF ORE DEPOSITION BY WAVY MOSAIC STRUCTURES——EVIDENCE MAINLY FROM THE EASTERN QINLING MOUNTAINS

Taking the metallogenic characteristics of the Eastern Qinling Mountains and other areas for example, this paper discusses some characteristics of control of ore deposition by wavy mosaic structures. 1.The wavy metallogenic periodicity is a wave feature of ore deposition in the evolution of time.There are several obvious metallogenic rhythms in China,and metallogenic periods of 1200 m.y.,600 m.y.,65±5 m.y.and 35±5 m.y.may be distinguished.The metallogenic intensity of various periods changes in line with the neal-isochronous law andthe time interval varies trom 150 or 200 m.y. （or is the mutiple of this figure）. 2.The geographical and geohistorical zoning and grading of wavy ore deposition are related to the amplitude and accumulative energy of the crustal waves. The wavy ore-forming structures may fal, into the global grade and the 1st—5th grades. 3.The equi-distant character of the wavy ore-forming structures is the multiple of the "wave ength cardinal number"of a certain crustal wave in a certain medium of the crust as well as a reflection of the crustal wave movement generated by the stress wave in different crustal structural layers.The equi-distant character of the ore-forming structures in the Eastern Qinling Mountains and others areas is very pronounced. 4.Following the structures,the metallogenic belts of various orders in China exhibit a definite orientation.They are mainly oriented obliquely,but the E-W-and N-S-trending ore-controlling structures are also important. 5.The"interweaving" of crustal waves of various tectonic systems is a characteristic of the control of ore deposition by superposed wave cresttype, crest-trough-type and superposed trough-type structures resulting from interweaving of wave crests and troughs.