Physical properties of skarns

D. W. Emerson

doi:10.1071/EG986201

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

Physical properties of skarns
Authors D. W. Emerson^a
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^a Department of Geology and Geophysics, The University of Sydney, , NSW, 2006, , Australia
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 17, Issue 4, Dec 1986, p. 201 - 212
DOI: https://doi.org/10.1071/EG986201
- Published online: 01 Dec 1986

Abstract

A petrophysical laboratory study was carried out on samples of skarn, lightly mineralized skarn ores, associated calc silicates, carbonate host rocks, intrusive granitoids and country rocks from mineralized areas at King Island, Duckmaloi and Mt Moss. The skarn categories were found to be relatively dense and porous, and to have some radiometric character in the form of low potassium content. Rocks from the skarn environments had variable magnetic susceptibility and remanence properties that were not generally diagnostic. Electrical resistivities of skarns, although somewhat lower than the other rock types, tended to be high but this property was not distinctive. Induced polarization was, as expected, sensitive to the presence of minor sulphides. Thermal conductivities could not differentiate the rock types. Acoustic ultrasonic velocities were high for most rocks and could not be used to distinguish types.

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1986-12-01

2026-01-22

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References

Broken Hill Proprietary Company Ltd, Exploration Department (1981), ‘Authority to Prospect 1856M Ewan, North Queensland’, Final Report, 3 volumes (unpub.).
Burt D. M. (1977), ‘Mineralogy and petrology of skarn deposits’, Rendiconti Societa Ital. Mineral. Petrol. 33, 859-973.
Chapman B. H. & Thompson D. T. (1984), ‘Applications of geophysical logging within skarn type deposits’, The Log Analyst 25, 13-22.
Danielson M. L. (1975), ‘King Island scheelite deposits. Economic Geology of Australia and Papua New Guinea’, Metals, Monograph, no.5, 592-7. Australian Institute of Mining and Metallurgy.
Emerson D. W. (1983), ‘Physical properties of skarns – a preliminary study. Earth Research Foundation Report 83/1, University of Sydney.
Einaudi M. T. & Burt D. M. (1982), ‘Introduction-terminology, classification and composition of skarn deposits’, Econ. Geol. 77, 745-54.
Kwak T. A. P. & White A. J. R. (1982), ‘Contrasting W-Mo-Cu and W-Sn-F skarn types and related granitoids’, Min. Geol. 32, 339-51.
Manthorpe G. P. (1981), Structural and petrological investigation of the Mt Moss skarn, Ewan, North Queensland. B.Sc. Hons. Thesis, unpub., University of Sydney.
Parkhomenko E. I. (1967), Electrical Properties of Rocks 314. Plenum Press.
Stanton R. L. (1972), Ore Petrology 713. McGraw Hill.
Weber C. R., Paterson I. B. L. & Townsend D. J. (1978), Mineral Resources No.43. Geol. Survey NSW, 218 pp. (Duckmaloi skarn: 140-1.)
Zemstsov V. N. (1976), ‘Methods of geophysical exploration and prospecting for tungsten in the Primor’e region (Soviet Maritime Province)’, Geologiya i Geofizika 17, 78-89.

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Article Type: Research Article

Keyword(s): density; electrical resistivity; gamma ray spectro-scopy; induced polarizability; magnetic susceptibility; physical properties; porosity; remanence; skarn; skarn deposit; thermal conductivity; ultrasonic velocities

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Physical properties of skarns

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