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    Development of geochronology from isotopic chronology to tectonic chronology must evolve several stages including ther- mal chronology, tectono-thermochronology and deformation chronology. The isotopic chronology merely and simply refers ages to geologic episodes, however, the thermal chronology can provide both ages and temperature information, and the tectonic chronology emphasizes four-dimensional temporal and spatial evolution in a geological or tectonic processes. The tectonic chronology has multiple significances such as temperature, crustal depth and geological fluids, besides a time factor. It implies a great deal of information includ- ing time, temperature, horizontal and vertical deformation and development. In view of present technology and understanding level, we should pay special attentions to some important problems. Among these problems, emphasizing field geology or structural geology is the essential prerequisite to develop the tectonic chronology.
    Chronology
    Thermochronology
    Geochronology
    Radiometric dating
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