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Archaean gold mineralisation in a normal-motion shear zone at Harbour Lights, Leonora, Western Australia

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Abstract

Although many Archaean greenstone-hosted mesothermal gold deposits are in steep, reverse-motion fault zones, other fault geometries are prospective for mineralization. Harbour Lights is one of a number of deposits at Leonora hosted in a normal-motion shear zone, probably related to movement off the adjacent domal granitoid. The deposit is also atypical in that mineralization predates the last deformation to affect the mine sequence, but formed by similar processes to other mesothermal deposits in all respects other than the detail of shear zone geometry, kinematics and timing.

Gold mineralization at Harbour Lights is related to D1 quartz veins parallel to a well-developed gently NE- to E-dipping D1 cleavage, both of which are deformed in steeply dipping and later extensional shear bands (D2). Gently dipping quartz veins, as at Harbour Lights, must have formed at extremely high fluid pressures, capable of holding the weight of the overlying crust. In the gently dipping normal-motion shear zone continued reactivation and veining was possible only with extremely high fluid pressures, and steeply dipping structures, such as the D2 extensional shear bands, were initiated as the fluid pressure dropped after the mineralizing event.

The rarity of gold mineralization hosted in normal-motion shear zones is due to their being linked to steep structures which pump fluid upwards and prevents the build-up of extremely high fluid pressures. At Harbour Lights it appears that these links were (atypically) absent, probably because deformation was a result of granitoid doming, and was subparallel to strata.

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References

  • Anderson, E.M. (1951) The Dynamics of Faulting. Boyl, Edinburgh

    Google Scholar 

  • Andrews, A.J., Hugon, H., Durocher, M., Corfu, F., Lavigne, M.J. (1986) The anatomy of a Gold-Bearing Greenstone Belt: Red Lake, Northwestern Ontario, Canada. In: Macdonald, A.J. (ed.) Gold '86 An International Symposium of the Geology of Gold Deposits. 3–22

  • Berthé, D., Choukroune, P., Jegouzo P. (1979) Orthognesis, mylonite and non coaxial deformation of granites: the example of the South Armorican shear zone. J. Structural Geol. 1:31–42

    Google Scholar 

  • Clark, M.E., Carmichael, D.M., Hodgson, C.J. (1989) Wall-rock alteration, Victory Gold Mine, Kambalda, Western Australia: processes and P-T-XCO2 conditions of metasomatism. Econ. Geol. Monogr. 6:445–459

    Google Scholar 

  • Clout, J.M.F. (1988) The tectonic setting and plumbing system of the Golden Mile, Kalgoorlie, Western Australia. Bicentennial Gold '88, Extended Abstracts, Vol. 1:65–67

    Google Scholar 

  • Colvine, A.C., Fyon, J.A., Heather, K.B., Marmont, S., Smith, P.M., Troop, D.G. (1988) Archean Lode gold deposits in Ontario. Ontario Geol. Surv. Misc. Paper. 139, 136 pp.

  • Dowling, K., Morrison, G.W. (1989) Application of quartz textures to the classification of North Queensland gold deposits. Econ. Geol. Monogr. 6:342–355

    Google Scholar 

  • Finucane, K.J. (1965) Geology of the Sons of Gwalia mine. In: McAndrew, J. (ed.) Geology of Australian ore deposits, 8th Comm. Mining Metall. Congr., Melbourne, 95–97

  • Gibbs, A.D. (1984) Structural evolution of extensional basing margins. J. Geol. Soc. Lond. 141:609–620

    Google Scholar 

  • Graham, R.H. (1980) The role of shear belts in the structural evolution of the South Harris igneous complex. J. Struct. Geol. 2:29–37

    Google Scholar 

  • Groves, D.I., Barley, M.E., Ho, S.E. (1989) Nature, genesis, and tectonic setting of mesothermal gold mineralization in the Yilgarn Block, Western Australia. Econ. Geol. Monogr. 6:71–85

    Google Scholar 

  • Ho, S.E., Groves, D.I. (1987) Recent advances in understanding Precambrian gold deposits. Geol. Dept. and Univ. Ext., Univ. West Aust. 386 pp.

  • Ho, S.E., Groves, D.I. (1988) Advances in understanding Precambrian gold deposits, Volume 2. Geol. Dept. Univ. Ext., Univ. West Aust. 360 pp.

  • Hodgson, C.J. (1989) The structure of shear-related, vein-type gold deposits: a review. Ore Geology Rev. 4:231–273

    Google Scholar 

  • Holyland, P.W. (1990a) Introduction to geomechanical prospecting: geological targets for gold exploration. Terra Sancta. Perth (unpaginated)

    Google Scholar 

  • Holyland, P.W. (1990b) Simulation for the dynamics of Archaean deformation in the Yilgarn Black, Western Australia. In: Glover, J.R.A., Ho, S.E. (eds.) Third International Archaean Symposium, Perth, 1990. Extended abstracts volume, pp. 347–349. Geoconferences (W.A.) Perth

  • Hronsky, J.M.A., Cassidy, K.F., Grigson, M.W., Groves, D.I., Hagemann, S.G., Mueller, A.G., Ridley, J.R., Skwarnecki, M.S., Vearncombe, J.R. (1991) Nature and setting of primary gold deposits: deposit- and mine-scale structure. In: Ho, S.E., Groves, D.I., Bennett, J.M. (eds.) Gold deposits of the Archaean Yilgarn Block, Western Australia: nature, genesis and exploration guides. Geol. Dept. (Key Centr.) and Univ. Ext., Univ. West. Aust. 20:38–54

  • Knipe, R.J. (1989) Deformation mechanisms — recognition from natural tectonites. J. Struct. Geol. 11:127–146

    Google Scholar 

  • Lesh, R.H. (1987) The Harbour Lights gold deposit. The Second Eastern Goldfield Geological Field Conference, Kalgoorlie. Geol. Soc. Aust. East. Goldfields. Disc. Grp. 57–62

  • Lister, G.S., Snoke, A.W. (1984) S-C Mylonites. J. Struct. Geol. 6:617–638

    Google Scholar 

  • Makar, WM. (1988) Harbour Lights Mine Gold Project. Bicentennial Gold '88 Excursion Guidebook, Western Australian Gold Deposits. Geol. Dept. and Univ. Ext., Univ. West. Aust. 14:132–134

    Google Scholar 

  • MacDonald, A.J. (1986) Gold '86, An International Symposium on the geology of gold deposits. 517 pp.

  • Mueller, A.G., Harris, L.B. (1988) An application of Wrench Tectonic Models to mineralized structures in the Golden Mile District, Kalgoorlie, Western Australia. In: Ho, S.E., Groves, D.I. (eds.) Recent advances in understanding Precambrian gold deposits. Geol. Dept. and Univ. Ext., Univ. West. Aust. 11:67–107

  • Nutt, T.H.C., McCourt, S., Vearncombe, J.R. (1988) Structure of some gold and antimony-gold deposits from the Kaapvaal and Zimbabwe Cratons. In: Ho, S.E., Groves, D.I. (eds) Advances in Understanding Precambrian gold deposits, Volume 2. Geol. Dept. and Univ. Ext., Univ. West. Aust. 12:63–80

  • Roberts, R.W. (1987) Ore Deposit Models #11. Archean Lode gold deposits. Geoscience Canada. 14:37–52

    Google Scholar 

  • Sibson, R.H. (1981) Controls on low-stress hydrofracture dilatancy in thrust, wrench and normal fault terrains. Nature 289:665–667

    Article  Google Scholar 

  • Sibson, R.H. (1990) Faulting and fluid flow. In: Nesbitt, B.E. (ed.) MAC short course on ‘crustal fluids’, Handbk. 18:93–132

  • Sibson, R.H. (1985) A note on fault reactivation. J. Struct. Geol. 7:751–754

    Google Scholar 

  • Sibson, R.H., Robert, F., Poulsen, K.H. (1989) High-angle reverse faults, fluid-pressure cycling, and mesothermal gold-quartz deposits. Geology. 16:551–555

    Google Scholar 

  • Skwarnecki, M.S. (1987) Controls on Arachaen gold mineralisation in the Leonora district, Western Australia. In: Ho, S., Groves, D.I. (eds.) Geol. Dept. and Univ. Ext., Univ. West. Aust. 11:109–136

  • Skwarnecki, M.S. (1988) Alteration and deformation in a shear zone hosting gold mineralization at Harbour Lights, Leonora, Western Australia. In: Ho, S.E., Groves, D.I. (eds.) Geol. Dept. and Univ. Ext., Univ. West. Aust. 12:111–129

  • Vearncombe, J.R., Barley, M.E., Eisenlohr, B.N., Groves, D.I., Houstoun, S.M., Skwarnecki, M.S., Grigson, M.W., Partington, G.A. (1989) Structural controls on Mesothermal gold mineralization: examples from the Archean terranes of Southern Africa and Western Australia. Econ. Geol. Monogr. 6:124–134

    Google Scholar 

  • Watkinson, A.J., Cobbold, P.R. (1981) Axial directions of folds in rocks with linear/planar fabrics. J. Structural Geol. 3:211–217

    Google Scholar 

  • Williams, P.R., Nisbet, B.W., Etheridge, M.A. (1989) Shear zones, gold mineralization and structural history in the Leonora district, Eastern Goldfields province, Western Australia. Aust. J. Earth Sci. 36:383–404

    Google Scholar 

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  1. Key Centre for Teaching and Research in Strategic Mineral Deposits, Department of Geology, The University of Western Australia, 6009, Nedlands, Australia

    J. R. Vearncombe

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  1. J. R. Vearncombe
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Vearncombe, J.R. Archaean gold mineralisation in a normal-motion shear zone at Harbour Lights, Leonora, Western Australia. Mineral. Deposita 27, 182–191 (1992). https://doi.org/10.1007/BF00202541

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  • DOI: https://doi.org/10.1007/BF00202541

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