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Holmes prospect, Jervois Range, Jervois Station, Central Desert Region, Northern Territory, Australia

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Latitude & Longitude (WGS84): 22° 43' 10'' South , 136° 13' 41'' East
Latitude & Longitude (decimal): -22.71956,136.22830
Köppen climate type:BWh : Hot deserts climate


Cu-W anomaly. (Plenty River Mining Co. NL) maps provide little detail over the location of the deposit, but accepting the existing Mindat location, based on information at Northern Territory Govenment STRIKE database(Spatial Territory Resource Information Kit for Exploration), places the deposit about 3 kilometres south of the Bellbird Mine, and main J structured syncline, that most of the deposits in this area are situated in. A line of east-west outcropping on flat plains can be seen near the Mindat map location, matching the description. This source indicates the Wards Prospect listed separately is part of the same lode horizon.

The prospect is marked by a series of banded iron formation outcrops, along a 4500 metre length. Banded iron formation is not characteristic of the lodes in the main J structure deposits. The banded iron formation at Holmes is not associated with the Cu-W mineralisation formation.

The lode horizon contains magnetite-chlorite-quartz, banded iron formation, and malachite staining of surface outcrops, enclosed by quartz-sericite and knotted schist, impure marble, epidote-quartzite beds, amphibolite and quartz-tourmaline rock.

Scheelite is noted along a length of 96 metres, up to 0.6 metres wide, and as discontinuous mineralisation for a total of 600 metres. Surface malachite is the only copper noted, however other species may exist at depth but remains un-explored.





Mineral List


10 valid minerals.

Rock Types Recorded

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Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleoproterozoic
1600 - 2500 Ma



ID: 3186582
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Comments: Arunta Block

Lithology: Granulite grade orthogneiss/paragneiss/metavolcanic gneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Orosirian
1800 - 2050 Ma



ID: 806005
Bonya Schist

Age: Orosirian (1800 - 2050 Ma)

Stratigraphic Name: Bonya Schist

Description: Muscovite, biotite and two-mica schists, some with andalusite, sillimanite or garnet; calc-silicate rock; metapelitic and meta-acidic volcanic rocks; amphibolite; skarn-like rock; magnetite quartzite; rare migmatite.

Comments: metasedimentary siliciclastic; synthesis of multiple published descriptions

Lithology: Metasedimentary siliciclastic

Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia). [5]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page 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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kojan, C. (1982) Final Report, EL 1585, Otter Exploration NL (CR 82/299).
Freeman, M.J., Woyzbun, P. (1986) 1:250 000 Huckitta SF53-11 Geological Map Series Explanatory Notes, Department of Mines and Energy, Northern Territory Geological Survey.
Ypma, Dr. P.J. (1987) Final Report on Exploration Leases 3202, 3203 and 3204, Plenty River Mining Company N.L. (CR 87/146).
Dickson, G.O. (1989) Plenty River Mining Company Review of Geophysics Jervois Range, G.O. Dickson & Associates Pty.Ltd.

 
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