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Rankin Prospect, The Gardens Station, Central Desert Region, Northern Territory, Australia

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Latitude & Longitude (WGS84): 23° 16' 52'' South , 134° 5' 44'' East
Latitude & Longitude (decimal): -23.2811700704, 134.095641249


The prospect consists of two deposits, 300 metres apart. Both are at the same stratigraphic level in a steep south plunging fold. The smaller lense is 60 metres long by 10 metres wide, adjacent to banded magnetite-quartz rock, calc-silicates, and amphibolite.

The lense shows malachite and chrysocolla staining in martite, quartzose, granular, gossan, weathered coarse anthophyllite quartzite, and magnetite, with much of the amphibolite altered to chlorite and biotite. (Freytag) adds marble, magnetite-calcite, and quartz-sericite schist. The country rock is hornblende-magnetite-plagioclase granulite, and biotite-garnet schist.

The larger lense to the north is part of a ridge of banded anthophyllite-tremolite-magnetite quartzite, with malachite and galena associated with marble. There is a small pit on copper stained gossanous calc-silicate outcrop of schistose biotite-chlorite-muscovite-carbonate-quartz rock. To the north and south is strongly sheared garnet-chlorite-sericite schist, and hornblende-epidote-biotite-chlorite-plagioclase granulite.

Copper grades range from 16% Cu at the surface to 4% where secondary copper passes into primary mineralisation of chalcopyrite and bornite (Pigott). This gives the impression the prospect is copper, however (Freytag) at a later day focusses on lead and zinc, with some secondary copper. The deposit tested as 2.5% Pb and 1.2% Zn, with the hornblende schist up to 20% volume magnetite-pyrite-galena-sphalerite.

(Clarke) in 1971 states the deposit is found in quartz-magnetite gneiss, schists, marble, amphibolite, and leucocratic acid gneiss.

Mineral List


13 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

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The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Pigott, G.F., McLennan, R.M. (1984) Exploration Licence 4420 - Sliding Rock Well. Annual Report to the Northern Territory Department of Mines and Energy for the period ending 18th October 1984, Australian Anglo American Limited.

Freytag, I.B. (1994) E.L. 8164 - Rankins N.T. Review of Past Work and Exploration Opportunities, Roebuck Resources NL, Technical Report No.379.

Clarke, D. (1971) Winnecke-Authority to Prospect 1721. Northern Territory Progress Report, Central Pacific Minerals N.L.

 
Mineral and/or Locality  
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