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Black Jack Mine, Kuaotunu, Coromandel peninsula, Thames-Coromandel District, Waikato Region, North Island, New Zealand

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Latitude & Longitude (WGS84): 36° 43' 4'' South , 175° 43' 54'' East
Latitude & Longitude (decimal): -36.71793,175.73170
GeoHash:G#: rckzngeyt
Köppen climate type:Cfb : Temperate oceanic climate

The deposit contains alunite, quartz after platy calcite, kaolinite, pyrite, adularia, trace pyrrhotite, and gold, in chalcedonic silica pipes in a sinter deposit.

The mine is said to be close to the eastern edge of the Kuaotunu town, on a high bluff close to the sea, and along the coast here now is the Black Jack conservation reserve. Mindat co-ordinates are very approximate, and only denote the general area. The name of the mine is stated as coming from the dark coloured rock at the site, however it is tempting to think it relates to the names of its early owners, who by a happy coincidence some have coloured surnames.

In 1891, the mine produced 30 tonnes of ore for 28 ounces of gold. The mine operated intermittently across the 1890's.

The lease was developed from 1889, by A. White and party. In 1892, the lease is worked by Rowe and party. Across at least 1891 to 1894, A.G.S. Black and Pierce take out 70 tonnes of ore. Black suggests electricity could be generated for the mines by installing windmills on the hills, and is almost laughed out of town. A man born over one hundred years too early.

In 1908 Sam A. Shaw applied for the lease, and in 1909 John A. McNeill took over. Its stated at this time, that 215.5 tonnes of ore has been crushed from Black Jack during its life.

Mineral List

6 valid minerals.

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

Zanclean - Tortonian
3.6 - 11.62 Ma

ID: 1324506
Waitaia Sinter of Kuaotunu Subgroup (Coromandel Group) of Coromandel Volcanic Zone

Age: Neogene (3.6 - 11.62 Ma)

Stratigraphic Name: Waitaia Sinter

Description: Quartz sinter, forming terraces and plugs.

Comments: Neogene igneous rocks. Age based on absolute age calculated from stratigraphic age range

Lithology: Major:: {sinter}

Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. [13]

Cretaceous - Jurassic
66 - 201.3 Ma

ID: 1310166
Manaia Hill Group

Age: Mesozoic (66 - 201.3 Ma)

Stratigraphic Name: Manaia Hill Group

Description: Sandstone, siltstone and conglomerate.

Comments: Eastern Province (Waipapa Composite Terrane) Rocks

Lithology: Sandstone, siltstone, conglomerate

Reference: Edbrooke, S.W., Heron, D.W., Forsyth, P.J., Jongens, R. (compilers). Geology Map of New Zealand 1:1 000 000. GNS Science Geological Map 2. [12]

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

This page contains all mineral locality references listed on 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 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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
New Zealand Herald newspaper (1889) The New Goldfield. The Kuaotunu Claims. Visit to the Field. The Best Since the Discovery of the Thames. Splendid Prospects, Vol. XXVI, issue 9432, 01 August 1889.
New Zealand Herald newspaper (1889) The New Goldfield at Mercury Bay, Vol. XXVI, issue 5459, 02 September 1889.
New Zealand Herald newspaper (1891) Kuaotunu, Vol. XXVIII, issue 8738, 01 December 1891.
Thames Star newspaper (1892) Mining, Vol. XXIII, issue 7088, 21 January 1892.
Auckland Star newspaper (1893) Kuaotunu, Vol. XXIV, issue 235, 04 October 1893.
New Zealand Herald newspaper (1894) Kuaotunu, Vol. XXXI, issue 9457, 13 March 1894.
Auckland Star newspaper (1901) Kuaotunu, Vol. XXVIII, issue 8738, 01 December 1901.
Auckland Star newspaper (1908) Coromandel Warden's Court, Vol. XXXIX, issue 138, 10 June 1908.
Auckland Star newspaper (1909) Warden's Court, Vol. XL, issue 244, 13 October 1909.
Bell, J.M., Fraser, C. (1912) The geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Geological Survey, Bulletin No. 15, New Zealand Government, Wellington, 192 pages.
Christie, A.B., Mauk, J.L., Simpson, M.P., Brathwaite, R.L., Simmons, S.F. (2007) Epithermal Au-Ag and Related Deposits of the Hauraki Goldfield, Coromandel Volcanic Zone, New Zealand. Economic Geology, 102:5, 785-816.

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