Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (1): 273-281.doi: 10.13278/j.cnki.jjuese.201501301

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Using Airborne Magnetic Gradiometer Data to Determine Magnetic Rock Mass Boundary

Guo Hua1,2, Jia Weijie2, Wang Ping1,2, Xie Rukuan2   

  1. 1. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China;
    2. China Aero Geophysical Survey & Remote Sensing Center for Land and Resources, Beijing 100083, China
  • Received:2014-07-06 Published:2015-01-26

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Abstract:

Three Axis Airborne Magnetic Gradiometer with self-owned intellectual property rights was developped, and carried out gradient measurements of aeromagnetic survey in given area of North of China, which gain the ideal gradient data. However, how to apply the gradient data for geological interpretation is still in research stage. In this paper, how to use the gradient data in the lithology determining and rock mass boundary delineating are studied based on airborne three axis gradient measurement principle. Aeromagnetic gradient survey is divided into horizontal gradient, vertical gradient, and three axis gradient measurement. Data from hree axis gradient provides more abundant geophysical information in lithologic judgment. It shows that the effect of lithologhy judgment and rock mass boundary is reasonable using the gradient data Compared with the actual geological condition. Because of the characteristic of the gradient data in suppressing background field, not only the approximately buried depth of the rock mass can be estimated, and the boundary position of the rock mass can be accurately determined.

Key words: three axis airborne magnetic gradiometer, the principle of gradient survey, lithology determine, rock mass boundary delineate

CLC Number: 

  • P631.2

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