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Abstract

Summary

The goal of the investigation is to prospect the north extension of the epithermal quartz gold-bearing vein. The object is located within the Kimmerides of the Okhotsk-Chukotka volcanic belt. The vein is 500 meters long and 3 meters wide. It is covered by 100 meters of volcanic rocks. The complex of geophysical methods was applied (audiomagnitotelluric sounding (AMT), Magnitovariational profiling (MVP), ground gravity and magnetic survey).

Field works showed that the main vein is appeared in geophysical methods as the zone of: increased values of resistivity, the zone has a deep channel; increased values of invariant phase; increased values of the gradient of tipper phase; increased values of the gradient and negative local anomalies of the gravity field; decreased values of the effective magnetization. The indicated features can be called as the “Geophysical structural prospecting criteria”. The regular alteration of the chemical element associations are observed from the South to the North: sub-ore (Mo-Cu) → ore (Au-Ag-As) → supraore (Sb-Hg).

The physical-geological model of the epithermal quartz gold-bearing vein was suggested. The position of the North end of the vein was predicted as a result of the integrated data analysis. This position was later confirmed by drilling.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201800490
2018-04-23
2024-04-16

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References

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Integration of the AMT in Ls-epithermal Au-ag Veins Exploration in Chukotka Region
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201800490
/content/papers/10.3997/2214-4609.201800490
/content/papers/10.3997/2214-4609.201800490
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