The application of drillhole magnetometry and mise-a-la-masse in the exploration for nickel sulphides, Finland – discovery of the Telkkälä orebody

R. Pietilä

doi:10.1071/EG991299

ISSN: 0812-3985
E-ISSN: 1834-7533

The application of drillhole magnetometry and mise-a-la-masse in the exploration for nickel sulphides, Finland – discovery of the Telkkälä orebody
Authors R. Pietilä^a
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^a Outokumpu Finnmines Oy Exploration, P.O. Box 67 SF-83501 Outokumpu Finland
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 22, Issue 2, Jun 1991, p. 299 - 304
DOI: https://doi.org/10.1071/EG991299
- Published online: 01 Jun 1991

Abstract

During the 1980s Outokumpu Exploration carried out several exploration programs for nickel sulphides in eastern Finland. Geophysical methods have been significant both in locating nickel bearing intrusives hosted by mica gneiss and in detailed downhole investigations of the dimensions of the ore zones.

In-hole 3-component magnetic and mise-a-la-masse measurements contributed to the discovery of a small but high grade orebody beneath a worked out shallow deposit at Telkkala, southeastern Finland.

The high contrast in magnetization and conductivity between the ore mineralization and the host gneisses provides a favourable situation for quantitative interpretation of the geophysical data.

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1991-06-01

2026-01-16

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References

Aarnisalo, J., (1984). ‘Image processing and integration of geophysical, Landsat and other data as a tool for mineral exploration in glaciated Precambrian terrain.’ ERIM Proc. Int. Symp. on Rem. Sens. Env., Third Them. Conf., Rem. Sens, for Explor. Geol., Colorado Springs, Colorado, 1, 107-128.
Hattula, A., (1986). ‘Magnetic 3-component borehole measurements in Finland’. In: Borehole geophysics for mining and geotechnical applications, Killeen, P. G., Ed., Geol. Surv. Canada, Paper 85-27, 237-250.
Ketola, M., (1982). ‘On the application of geophysics and geology to exploration for nickel-copper ore deposits in Finland’. Geol. Surv. of Finland, Report of Investigations 53, 103p.
Levanto, A., (1959). A three-component magnetometer for small drillholes and its use in iron ore prospectinq.’ Geophys. Prosp., 7, 183-195.
Papunen, H., and Gorbunov, G.I., (Eds), (1985). ‘Nickel-copper deposits of the Baltic Shield and Scandinavian Caledonides.’ Geol. Surv. Finland Bull,. 333, 394 p.

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Article Type: Research Article

Keyword(s): drillhole geophysics; drillhole magnetometry; Finland.; magnetic 3-component survey; magnetic vectors; mise-a-la-masse; modelling; nickei exploration

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The application of drillhole magnetometry and mise-a-la-masse in the exploration for nickel sulphides, Finland – discovery of the Telkkälä orebody

Abstract

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