The applications and effects of comprehensive non-seismic geophysical and geochemical exploration techniques
Jia Jindou1, He Zhanxiang2, Kong Fanshu2
The 5th Geologlcal Survey invision subordinate to Bureau of Geophysical Prospecting， P．O． Box 1，Gucheng，Dingxing County,Hebei Province,072656)OGP,1998, 33(5
Abstract：In accordance with different exploration targets and geophysical conditions in a prospecting area，non-seismic geophysical and geochemical exploration techniques are used selectively to carry out combined exploration and comprehensive interpretation. The main prospecting techniques used at present time are gravity，magnetis，electric and geochemical surveys. Because of the improvement of field data acquisition quality and the advancement of computer technique，the limitation of single data interpretation has been broken through，and new comprehensive interpretation technique for geophysical and geochemical data has been used，so that it has reduced the multisolution of single gravity (or magnetic and electric) data and improved the accuracy of interpretation result.The application of non-seismic comprehensive processing and interpretation system has made the combined interpretation of gravity，magnetic and electric data come true. The examples of exploration show that the combined application technique of gravity，magnetic，electric and geochemical exploration may effectively resolve the tough problems such as the depression-uplift distribution，regional geology structure，and I::}，ement structure of a basin at the early stage of exploration;and it makes oil-bearing potential evaluation of structural units in combination with seismic，drilling and geological data. In target exploration，good results have been achieved in the following aspects:reef exploration in carbonate rock region，igneous rock delineation，basement lithofacies prediction，overlying strata lithology and mountain front overthrust.
