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| Gravity and magnetic anomalies characteristics of rock bodies and ore-prospecting orientation in the southeast of Hubei Province |
| ZHU Dan, LIU Tian-You, YANG Yu-Shan |
| Institute of Geophysics and Geomatic,China University of Geosciences,Wuhan 430074,China |
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Abstract There exists close relationship between intermediate-acid intrusive rock and regional mineralization in the southeast of Hubei Province. According to the features of rock bodies and geophysical properties of the ores and the model put forward by geologists, the authors set up a geological-geophysical model which is characterized by multi-identifying information and identifying mark. And then, the authors used actual data to prove it. The authors extracted weak local gravity and magnetic anomalies to compare theoretical model's combination with local gravity and magnetic anomalies on different scales with the effect of the theoretical model through wavelet multi-scale decomposition, from which the authors have drawn the conclusion that low gravity-high magnetic local anomalies are caused by rocks, whereas high gravity-high magnetic local anomalies are caused by large scale mineralized body on large scale details; high gravity-high magnetic local anomalies are caused by mineralized body on small scale details. On such a basis, the authors delineated 13 low gravity-high magnetic local anomalies and high gravity-high magnetic local anomalies areas which may have concealed rock bodies or mineralized bodies (orebodies). The authors infer that the northeast high gravity-high magnetic local anomaly stripe of Luosishan-ZKI01-Chenjiashantou, the ringlike high gravity-high magnetic local anomaly of Shizishan-Yupingshan and the high local gravity anomaly are further ore-prospecting targets, as shown by the features of known drill holes' relation to high gravity-high magnetic local anomalies.
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Received: 02 November 2016
Published: 20 August 2017
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