Method of 1∶250 000 Regional Geological Surveying in Orogenic Belts

The paper suggests that the geological mapping of 1∶250 000 in orogenic area should take the energical theory and continental dynamics as its academic guide idea and the tectonic as the main line with the geological mapping method which combines multi subjects. It concludes the rock construction and sequence (sedimentary rock province, magmatic rock province, metamorphic rock province, malange province) in the main tectonic units among different tectonic evolution stages in orogenic belts, paying attention to the structure, formation, evolution and basic tectonic characteristics of orogenic belts, especially to the three dimensional structure in orogenic process and orogenic belts nowadays. From the practice and method studies of geological mapping in seven mapping areas of orogenic belts in west China arranged by Geological Survey Bureau of China during Ninth Five Year plan, we suggest that we should use different geological methods in different rock provinces and summarize some theories and methods about typical rock provinces and textural geological mapping in orogenic belts respectively, such as non Smith stratigraphy, depositional basins, intrusive igneous rocks, metamorphic rocks, three dimensional structure and tectonic evolutional model of orogenic belts. The main aim of this paper is to provide some systematic theories and methods about 1∶250 000 regional geological mapping in blank region of Qinghai Tibet plateau among new cycle general survey of land and resources developed on large scale in China and improve the study of basic geological survey in cycle general survey of land and resources.