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Yang Y.-B.,Institute of Geophysics and Geochemical Exploration | Han G.-M.,Institute of Geophysics and Geochemical Exploration | Liang M.,Institute of Geophysics and Geochemical Exploration
Wutan Huatan Jisuan Jishu | Year: 2011

Working in Large-scale gravity exploration, the influence of short range terrain correction and intermediate area topographic correction error on gravity precision is great. In reality, short range terrain correction is calculated on actual measurement or using relief map, and intermediate area topographic is calculated on using relief map, "The standard for largescale gravity survey" only consider the influence of terrain elevation precision on gravity precision, but ignores the influence of relief map precision. On the basis of formula of terrain correction, we discuss the influence of scale, elevation and plane precision on gravity precision. We put forward some suggestions on the demand on scale, elevation and plane precision basis on terrain correction precision. Source


Yuan G.-Q.,Institute of Geophysics and Geochemical Exploration | Meng Q.-M.,Institute of Geophysics and Geochemical Exploration | Cui Z.-Q.,Institute of Geophysics and Geochemical Exploration
Wutan Huatan Jisuan Jishu | Year: 2010

This paper presents the results from the flying measured data of HDY - 402 three - frequency airbone electromagnetics system in erlianhot - dongwuqi area of Inner Mongolia Autonomous Region, and the audiors carry out the inversion and convert the electromagnetic field into the apparent resistivity ( ps ) caused by underground geological bodies. According the differences and distribution trends of the ps value, lithological and structure mapping was carried out in erlianhot-dongwuqi region of Inner Mongolia compared with the existed 1; 200000 Geological map, which shows a good results of the application of the technology. Source

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