Some Problems Concerning Regional Gravity Survey in Difficult Areas and Their Co

详细信息   

• 责任者：Geng Tao (Xi’ an Center of Geological Survey of CGS ; Xi’an 710054 ; China) ; Liu Kuanhou
• 刊名：Geophysical and Geochemical Exploration
• 出版年：2012
• 卷期：36(5)
• 关键词：重力勘探 ; gravity exploration ; 区域地质调查 ; regional geological survey ; 青藏高原 ; Qinghai-Tibetan Plateau
• 页码：p.749-754
• 图表：2 illus., 9 refs.
• 分类号：1600
• issnNo：ISSN1000-8918
• isbnNo：CN11-1906/P

摘要

It is difficult to carry out regional gravity survey in most parts of Tibetan Plateau due to the harsh natural and communication conditions as well as low level of basic mapping and bad communication. There exist many difficult problems in carrying out regional gravity survey work in this region, such as the selection and calibration of the gravimeter, the establishment of the control range and control points of GPS, the measurement of the level altitude of gravity measurement points, the revision of the near-zone terrain, and the collection of the physical properties of the specimen. Based on summarizing the experience gained from the 1 ： 200 000 regional gravity survey in Tibetan Plateau, the authors hold that many problems could be settled by the selection of high-precision and good sta- bility gravimeter, reasonable extension of the closing time, the adoption of CQG2000 quasi-geoid model to figure out the level elevation of a measuring point, and the expansion of the radius of the GPS base station. These measures can be used as references in the regional gravity survey work carried out in the Tibetan Plateau and other difficult areas.