Li J.-Y.,Chinese Academy of Geological Sciences |
Qu J.-F.,Chinese Academy of Geological Sciences |
Zhang J.,Chinese Academy of Geological Sciences |
Liu J.-F.,Chinese Academy of Geological Sciences |
And 19 more authors.
Geological Bulletin of China | Year: 2013
This paper briefly states new developments in research and investigations on crustal tectonic framework of the Northern China orogenic regions financially supported by China Geological Survey in the last three years, which include the temporal and spatial distributions of re-confirmed Pre-Nanhuanian continental blocks in the region, new data on some major hot-debated geological issues, and new viewpoints on the crustal tectonic framework, orogenic processes and metallogenic geological settings. And finally, some major issues open to be further studied on the crustal framework and metallogenic geological settings in the region are listed.
Cao F.,China Institute for Geo Environmental Monitoring |
Li R.-M.,China Institute for Geo Environmental Monitoring |
Wang Y.,China Institute for Geo Environmental Monitoring |
Ma Z.-S.,Hebei Institute of Geological Survey |
And 4 more authors.
Geological Bulletin of China | Year: 2010
Based on the data obtained from the multipurpose regional geochemical survey (1:250000) in the Beijing, Tianjin and Heibei Province, and the basic conception of geochemical baseline and environmental background values, the study area (Northern Haihe plain) was divided into three statistical units in light of the different depositional conditions. By using the method of standardization, that is, after repeatedly crossing out the surface soil anomalous data, geochemical baselines of various indicators were obtained through the correlation between other elements and inert element Ti, and after repeatedly crossing out the deep soil anomalous data, mean values, standard deviations and variation coefficients of 34 indicators were obtained, and thus characterized the background values. The above study may be cited as major scientific basis for regional soil environmental quality evaluation and monitoring.