MT surveys near Century Zinc Mine, NW Queensland, Australia

호주 Century 아연 광산에서의 MT 탐사

  • Lee, Tae-Jong (Groundwater and Geothermal Resources Devision, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Seong-Kon (Groundwater and Geothermal Resources Devision, Korea Institute of Geoscience and Mineral Resources) ;
  • Song, Yoon-Ho (Groundwater and Geothermal Resources Devision, Korea Institute of Geoscience and Mineral Resources) ;
  • Cull, James (Monash University)
  • 이태종 (한국지질자원연구원 지하수지열연구부) ;
  • 이성곤 (한국지질자원연구원 지하수지열연구부) ;
  • 송윤호 (한국지질자원연구원 지하수지열연구부) ;
  • Published : 2007.11.30

Abstract

Two-dimensional (2D) MT surveys near the Century mine in Australia have been performed with very far remote reference in Esashi, Japan (RR_ESS) as well as Gregory Downs (RR_GREG), which are roughly 6,400 km and 80 km apart from the survey area, respectively. Good quality of MT data could be obtained by remote reference processing with RR_GREG, while the coherency of magnetic fields between field sites and RR_ESS was not sufficient to be used as remote data. Both 2D and 3D inversion of 2D profile data represented the general geological structure beneath the survey area. The main target of the survey, Termite Range Fault, appeared as a boundary between a conductive block to the north and a resistive block to the south in the reconstructed resistivity section, and is inclined slightly to the north-east direction.

References

  1. Andrews, S. J., 1998, Stratigraphy and Depositional Setting of the Upper McNamarra Group, Lawn Hill region, northwest Queensland, Economic Geology, 93, 1132-1152 https://doi.org/10.2113/gsecongeo.93.8.1132
  2. Broadbent, G. C., and Waltho, A. E., 1998, Century zinc-leadsilver deposit. In: Geology of Australia and Papua New Guinean Mineral Deposits, Eds: D. A. Berkman and D. H. Mackenzie. Australasian Institute of Mining and Metallurgy, Melbourne, 729-736
  3. Feltrin, L., and Oliver, N. H. S., 2004, Evidence of multi-stage ore genesis at the Century zinc deposit, Northwestern Queensland, Australia, predictive mineral discovery CRC conference, 49-52
  4. Ord, A., Hobbs, B. E., Zhang, Y., Broadbent, G. C., Brown, M., Willetts, G., Sorjonen-Ward, P., Walshe, J. L., and Zhao, C., 2002, Geodynamic modeling of the Century deposit, Mt Isa Province, Queensland, Aust. J. of Earth Sci., 49, 1011-1039 https://doi.org/10.1046/j.1440-0952.2002.00968.x
  5. Sasaki, Y., 2004, Three-dimensional inversion of static-shifted magnetotelluric data, Earth Planet and Space, 56, 239-248 https://doi.org/10.1186/BF03353406
  6. Thomas, G., Stolz, E. M., and Mutton, A. J., 1992, Geophysics of the Century zinc-lead-silver deposit, northwest Queensland, Explor. Geophys., 23, 361-366 https://doi.org/10.1071/EG992361
  7. Uchida, T., 1993, Smooth 2-D inversion for magnetotelluric data based on statistical criterion ABIC, J. Geomag. Geoelectr., 45, 841-898 https://doi.org/10.5636/jgg.45.841
  8. Yumoto, K., Osaki, H., Fukao, K., Shiokawa, K., Tanaka, Y., Solovyev, S. I., Krymskii, G., Vershinin, E. F., Osinin, V. F., and $210^{\circ}$ Magnetic Meridian Chain Stations, 1994, Correlation of high- and low-latitude Pi2 magnetic pulsations observed at 210o Magnetic Meridian Chain Stations, J. Geomag. Geoelectr., 46, 925-935 https://doi.org/10.5636/jgg.46.925