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The Interpretation on the DeepFeatures of DeepFracture Zone in Tianjin Area Based on Gravity and Aeromagnetic Anomaly

JIAO Xin-hua,WU Yan-gang,MA Shu-yan,FAN Mei-ning,XIAO Peng-fei(College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China)  
On the basis of varied data processing such as layering of Earth'scrust?forward calculation and so on,A interpretation based on gravity and aeromagnetic anomaly including of extended orientation of some faults is given in this paper.These faults are Tianjin fault?Cangdong fault?the fault on west of Tianjin city and so on.The study and interpretation are consist of the analysis of evolutionary process and geological state of the Tianjijn area in the epoch of Bohai gulf rift-valley basin.The conclusion according to the study is gained: It is less possibility there are deep features exceeding crust extension in Tianjin area;On the west of Tianjin city there is a buried fault below down the Cenozoic group. It's occurrence is steep and extension is long.The mobility of the fault will give more influence on the stability of the crust in Tianjin area.
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