Volume 15, Issue 1 (Spring 2021 2021)
2021, 15(1): 1-34 |
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Ahmadi R, Baharloueie Z. Qualitative and Quantitative Evaluation of Geophysical Data Accordance with Assay Data in Yazd Darreh-Zereshk Copper Deposit to Propose Optimal Location for new Exploration Boreholes. Journal of Engineering Geology 2021; 15 (1) :1-34
URL: http://jeg.khu.ac.ir/article-1-2908-en.html
URL: http://jeg.khu.ac.ir/article-1-2908-en.html
1- Mining Engineering Department, Arak University of Technology , rezahmadi@gmail.com
2- Mining Engineering Department, Arak University of Technology
2- Mining Engineering Department, Arak University of Technology
Abstract: (3534 Views)
In Yazd Darreh-Zereshk copper deposit geophysical data containing magnetic, resistivity and induced polarization have been surveyed and 25 boreholes have been drilled in the area. In the present research, inversion and processing of geophysical data as well as their qualitative and quantitative accordance with boreholes assay data have been carried out. To achieve the goal first, total magnetic intensity map after applying necessary filters and processing, was mapped to identify surface and deep expansion of anomalies on it. Drawing the anomaly profile of magnetic stations surveyed along 4 geoelectric profiles shows that most of the magnetic anomaly zones have high chargeability and low resistivity that indicates the qualitative compatibility of magnetic and geoelectric data, as a result increasing the probability of mineralization in the area. Afterward on the basis of qualitative interpretation of geoelectrical sections, optimal locations of drilling on the each profile were proposed. Plotting mineral deposit cross-section along the geoelectrical profiles using the boreholes assay data, revealed that drilling of some boreholes located on the geophysical profiles haven’t been based on the results of geophysical operation, carried out without any right logic, purpose and design. In general, the qualitative accordance of the results of geoelectrical operation with the boreholes assay data showed a pretty good qualitative accordance. Also investigation of linear correlation coefficient value between inverted geophysical data and borehole assay in a specific same range after a same definite gridding and interpolation of their values, overall indicated a relatively good quantitative accordance (between 0.4 and 0.7)../files/site1/files/151/1.pdf
Keywords: Yazd Darreh-Zereshk copper deposit, Geophysical data, Smoothness inversion modeling, Assay data, qualitative and quantitative accordance
Type of Study: Case-Study |
Subject:
En. Geophisic
Received: 2019/11/13 | Accepted: 2020/02/10 | Published: 2021/05/31
Received: 2019/11/13 | Accepted: 2020/02/10 | Published: 2021/05/31
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