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| Aeromagnetic and aero-radioactive characteristics of the gold deposits in Changshanhao area |
| DU Hua-Yu1,2, LI Xiao-Lu1,2, YANG Yu-Qin1,2 |
1.Airborne Survey and Remote Sensing Center,Shijiazhuang 050002,China;
2.Geophysical Exploration Technology Center for Uranium Resources,CNNC(Key Laboratory),Shijiazhuang 050002,China |
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Abstract The gold deposit possesses particular geophysical characteristics. On the basis of its characteristics and ore-forming geological environment,the authors point out the prospecting direction, thus improving the results and getting greater achievements in gold prospecting by using the geophysical survey data. The Changshanhao gold deposit occurs in dark slate in Baiyun Obo Group and belongs to metamorphic rock type gold deposit. Applying 1:50,000 aviation radioactivity measurement and aeromagnetic data, the authors obtained the aerial survey potassium content of 2.64%,uranium content of 2.65×10-6 and thorium content of 10.2~13.5×10-6 in mineralized dark slate layer of Bilute Group. Compared with the background value, the layer possesses "high uranium, high thorium, low potassium" characteristics. The high value information of total count rate, U and Th is closely related to the gold-forming environment. The aeromagnetic field in the gold deposit has high aeromagnetic anomaly zones in NE direction, and there exist superimposed magnetic anomalies in the range from 200 to 600 nT. Aeromagnetic information contains the hidden rock mass information which is related to and controls the gold deposit, and the prospecting work was conducted in the gold prospecting areas around the Changshanhao gold deposit by using the deposit characteristic method. 11 promising areas were delineated along the northeastward extension gold belt, thus obtaining satisfactory achievements in gold prospecting by using the geophysical survey data.
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Received: 19 November 2015
Published: 20 June 2017
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