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Owera Mine, Whangapoua, Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealandi
Regional Level Types
Owera Mine- not defined -
Whangapoua- not defined -
Coromandel peninsulaPeninsula
Thames-Coromandel DistrictDistrict
Waikato RegionRegion
New ZealandCountry

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Key
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Latitude & Longitude (WGS84):
36° 46' 22'' South , 175° 40' 21'' East
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Whitianga3,367 (2011)7.1km
Coromandel1,502 (2014)15.7km
Tairua1,588 (2011)31.4km
Pauanui749 (2011)32.1km
Thames7,136 (2014)42.3km


Historic gold mine. Gold and silver as part of electrum in quartz veins, hosted by decomposed hypersthene-augite-andesite. The quartz veins are full of brown hematite patches, occasional pyrite remnants, and common cavities lined with drusy quartz crystals.

The mine is some 15 kilometres south-east of Whangapoua, on the ridge line between Whangapoua Harbour and Mercury Bay. It is rugged, thickly forested, and little visited, accessed via possibly closed forestry tracks. Maps indicate several mines across one kilometre north-east to south-west along the ridge, although historic information indicates the area was not that important for gold production. Activity lasted only three years.

Specimen stone comes from the site in 1890, and shortly after the Owera Gold Mining Company is formed, erects a tramway and battery, with its first crushing in 1892. This was 320 tonnes of ore yielding a respectable 756 ounces of gold. Much promotion follows stating the company is finding lots of gold, then suddenly in 1903 they announce the company is closing. Shareholders grill the directors over why there is now no gold, when they had been told of riches around the corner. The directors plead ignorance. The company is wound up.

The mine produced during the around eighteen months of operations, 1786 tonnes of ore yielding 2207 ounces of gold.

Across 1904-1905, prospecting occurs in the Lord Plunket Mine, which one source states is probably the old Owera. The activity occurred under the main adit of the old mine. Later prospectors Scott and Collier obtained the lease on option from the land owner J. Schiska. They had to abandon the mine when a landslip covered the adit entrance.

The Mindat co-ordinates are in the middle of the group of mines shown on topographical maps for Owera.


Regions containing this locality

Pacific OceanOcean
Australian Plate (Australia Plate)Tectonic Plate
North Island, New ZealandIsland

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Ulrich, G.H.F. (1898) Note on Peculiar Quartz-Pseudomorphs Found at the Owera Mine, Opitonui, North Island, New Zealand. Mineralogical Magazine 12, 33-34.
'Electrum'
Formula: (Au, Ag)
Reference: 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.
Gold
Formula: Au
Reference: 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.
Hematite
Formula: Fe2O3
Reference: Ulrich, G.H.F. (1898) Note on Peculiar Quartz-Pseudomorphs Found at the Owera Mine, Opitonui, North Island, New Zealand. Mineralogical Magazine 12, 33-34.
'Hypersthene'
Formula: (Mg,Fe)SiO3
Reference: Ulrich, G.H.F. (1898) Note on Peculiar Quartz-Pseudomorphs Found at the Owera Mine, Opitonui, North Island, New Zealand. Mineralogical Magazine 12, 33-34.
Pyrite
Formula: FeS2
Reference: Ulrich, G.H.F. (1898) Note on Peculiar Quartz-Pseudomorphs Found at the Owera Mine, Opitonui, North Island, New Zealand. Mineralogical Magazine 12, 33-34.
Quartz
Formula: SiO2
Reference: 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.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Electrum'1.AA.05(Au, Ag)
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 9 - Silicates
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Unclassified Minerals, Rocks, etc.
'Hypersthene'-(Mg,Fe)SiO3

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Electrum'-(Au, Ag)
'Hypersthene'-(Mg,Fe)SiO3

List of minerals for each chemical element

OOxygen
O QuartzSiO2
O Hypersthene(Mg,Fe)SiO3
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O HematiteFe2O3
MgMagnesium
Mg Hypersthene(Mg,Fe)SiO3
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
SiSilicon
Si QuartzSiO2
Si Hypersthene(Mg,Fe)SiO3
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
SSulfur
S PyriteFeS2
CaCalcium
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
FeIron
Fe Hypersthene(Mg,Fe)SiO3
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe HematiteFe2O3
Fe PyriteFeS2
AgSilver
Ag Electrum(Au, Ag)
AuGold
Au Electrum(Au, Ag)
Au GoldAu

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

Quaternary
0 - 2.588 Ma



ID: 3187411
Cenozoic volcanic rocks

Age: Pleistocene (0 - 2.588 Ma)

Lithology: Ignimbrite(s); felsic volcanic rocks; rhyolite

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]

Miocene
5.333 - 23.03 Ma



ID: 1308094
Coromandel Group Miocene andesite and basaltic andesite lava

Age: Miocene (5.333 - 23.03 Ma)

Stratigraphic Name: Coromandel Group

Description: Andesite and basaltic andesite lava, tuff and tuff breccia, agglomerate and pyroclastic flow deposits; andesite, diorite and dacite dikes and subvolcanic intusions.

Comments: Zealandia Megasequence Extrusive and Intrusive Rocks (Neogene)

Lithology: Andesite, tuffite, tuff-breccia, agglomerate, pyroclastic material, andesite, diorite, dacite

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]

Tortonian - Burdigalian
7.246 - 20.44 Ma



ID: 1315860
Kuaotunu Subgroup andesite and dacite (Coromandel Group) of Coromandel Volcanic Zone

Age: Miocene (7.246 - 20.44 Ma)

Stratigraphic Name: Kuaotunu Subgroup

Description: Basaltic andesite, andesite and dacite intrusives, flows, volcaniclastites and volcanic epiclastites.

Comments: Neogene igneous rocks. Age based on K-Ar

Lithology: Major:: {andesite},Minor:: {dacite}

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

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Thames Star newspaper (1890) Owera (Whangapoua), Vol. XXIII, issue 7251, 01 August 1892.
Thames Star newspaper (1890) Whangapoua Mining, Vol. XXII, issue 6681, 17 September 1890.
Auckland Star newspaper (1893) Owera Goldmining Company. The Company to be Wound Up, Vol. XXIV, issue 116, 18 May 1893.
Ulrich, G. H. F. (1898). Note on Peculiar Quartz-Pseudomorphs Found at the Owera Mine, Opitonui, North Island, New Zealand. Mineralogical Magazine 12, 33-34.
Christie, A.B., Simpson, M.P., Mauk, J.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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