Structure of Vodorazdelnaya ore zone of Mnogovershinnoye (MNV) gold deposit: data on open surface workings and diamond drilling core
The relevance of the discussed issue is caused by the need of further investigation of the MNV gold deposit tectonic structure. The main aim of the studyis to increase the probability of forecasting the spatial properties of ore-bearing vein zones. The methods used in the study: strain-analysis of v...
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2016-08-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
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| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1744 |
| Summary: | The relevance of the discussed issue is caused by the need of further investigation of the MNV gold deposit tectonic structure. The main aim of the studyis to increase the probability of forecasting the spatial properties of ore-bearing vein zones. The methods used in the study: strain-analysis of vein-containing structures and a new method of recognizing geological structures between the surface and the deep horizons using statistic data obtained from core documentation. The results. The author has put forward the hypothesis on a genetic relation of individual fault systems in the Vodorazdelnaya ore zone and the movements upon major faults. These faults define the structure of the whole Mnogovershinnoye deposit. Few systems of ajoint cracks were dedicated. These fractures were formed before, after and exactly in the ore stage. The carried out analysis shows that shear cracks (the main faults with North-Eastern strike) were the ore-controlling structures. They were formed in pre-ore stage and then they were reactivated in the ore stage. The proposed method for recognizing geological structures is based on finding intersections (data extrapolation) between structural data obtained by open mining and the accounted results of undirected diamond drilling core documentation. The depth of extrapolation was chosen as a maximum dipping depth of single investigated fractures due to erosion. Strike and dip angles for contacts, measured against core axis, were calculated in 36 positions of equal probability as if the plane of the contact was turned around the core axis with 10° discretion. A pair of dipping azimuth and angle was the key to recognize the same structures in trenches and in the core. So the author could measure the vertical dimension of cracks and veinlets as well as their consistency and proposed the requirements for documentation of core for implementation of the discussed method. |
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| ISSN: | 2500-1019 2413-1830 |