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Camoola Reef (Camoola Mine), Paeroa, Hauraki District, Waikato Region, New Zealandi
Regional Level Types
Camoola Reef (Camoola Mine)Reef
Paeroa- not defined -
Hauraki DistrictDistrict
Waikato RegionRegion
New ZealandCountry

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Key
Latitude & Longitude (WGS84):
37° 16' 59'' South , 175° 45' 59'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Waihi4,619 (2011)12.6km
Paeroa3,994 (2011)12.8km
Whangamata4,253 (2011)12.8km
Waihi Beach2,014 (2011)19.6km
Kerepehi537 (2011)20.7km


Silver-gold.

The vein is 915 metres long, dips 65 degrees west, averages 6.1 metres wide.

There are three distinct lenses, with three levels of workings. Each lense is about 12 metres wide, narrows north and south, and tapers at depth. The lenses are described as cavernous quartzose replacement after calcite, with bands of massive quartz and sheets of silicified propylite, stained in the upper levels with iron and manganese oxides . The northern lense is linked to the central lense by vein material, although displaced by two south dipping reverse faults. The central lense is linked to the southern lense by a shear zone, displaced by four reverse faults. Each lense contains similar geology.

The ore is mainly disseminated in irregular sheets of carbonate, or occur as thin bands in this material. Most veins in the lenses are un-mineralised.

Strong mineralisation occurred in a fan shaped section of the reef, containing galena, sphalerite, chalcopyrite, pyrite, aguilarite, electrum, native silver as the primary ore minerals. Some free gold is found in the upper oxidised areas of the reef in carbonate gangue. There is little secondary mineralisation. Ore mineralisation occurs as patches and very fine 'shreds' disseminated through the quartz-carbonate veins. Rhodochrosite and siderite gangue is also noted.

The reef was the third location discovered in the world for the rare sulpho-selenide aguilarite in 1972, although it has since been found in many other places, including six within this region. It occurs as clusters of minute anhedral crystals associated with the other ore minerals mentioned above, in a quartz-carbonate matrix. It rarely exceeds 0.05% volume of the rock

Little was found for the late 19th Century period, but the patchy and low grade nature for most of the reef may have limited development. Along with several other deposits nearby, the site was a focus for the Ohinemuri Gold and Silver Mines Company (1914-1930), however low silver prices forced a cessation of operations. In the late 1970's, the Consolidated Silver Mining Company of New Zealand Limited, or Consilver extracted gold and silver from the Camoola quartz veins.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


18 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Aguilarite
Formula: Ag4SeS
Reference: Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages. Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Main, J.V. (1979) Precious metal bearing veins of the Maratoto-Wentworth area, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 22:1, 41-51.
Calcite
Formula: CaCO3
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Calcite var: Manganoan Calcite
Formula: (Ca,Mn)CO3
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Chalcopyrite
Formula: CuFeS2
Reference: Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484.
'Chlorite Group'
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Dolomite
Formula: CaMg(CO3)2
Reference: Main, J.V. (1979) Precious metal bearing veins of the Maratoto-Wentworth area, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 22:1, 41-51.
'Electrum'
Formula: (Au,Ag)
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23. Main, J.V. (1979) Precious metal bearing veins of the Maratoto-Wentworth area, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 22:1, 41-51.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Galena
Formula: PbS
Reference: Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484.
Gold
Formula: Au
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Hessite
Formula: Ag2Te
Reference: Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484.
'Heulandite subgroup'
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
'K Feldspar'
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
'Manganese Oxides'
Reference: Main, J.V. (1979) Precious metal bearing veins of the Maratoto-Wentworth area, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 22:1, 41-51.
Marcasite
Formula: FeS2
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Pyrite
Formula: FeS2
Reference: Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484.
Quartz
Formula: SiO2
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Rhodochrosite
Formula: MnCO3
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Siderite
Formula: FeCO3
Reference: Christie, A.B., Brathwaite, R.L. (1996) Mineral Commodity Report 13-Silver. New Zealand mining 20: 16-23.
Silver
Formula: Ag
Reference: Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484. Christie, T., Brathwaite, B. (1996) Mineral Commodity Report 13-Silver. Institute of Geological and Nuclear Sciences Ltd.
Sphalerite
Formula: ZnS
Reference: Simon, G., Kesler, S.E., Essene, E.J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92, 468-484.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Electrum'1.AA.05(Au,Ag)
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Aguilarite2.BA.55Ag4SeS
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Hessite2.BA.60Ag2Te
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Calcite5.AB.05CaCO3
var: Manganoan Calcite5.AB.05(Ca,Mn)CO3
Dolomite5.AB.10CaMg(CO3)2
Rhodochrosite5.AB.05MnCO3
Siderite5.AB.05FeCO3
Group 9 - Silicates
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Heulandite subgroup'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Manganese Oxides'-

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
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Aguilarite2.4.1.3Ag4SeS
Hessite2.4.2.1Ag2Te
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Siderite14.1.1.3FeCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
var: Illite71.2.2d.2K0.65Al2.0[Al0.65Si3.35O10](OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Calcite
var: Manganoan Calcite
-(Ca,Mn)CO3
'Chlorite Group'-
'Electrum'-(Au,Ag)
'Heulandite subgroup'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Manganese Oxides'-

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
C Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
C SideriteFeCO3
C RhodochrositeMnCO3
C AnkeriteCa(Fe2+,Mg)(CO3)2
C DolomiteCaMg(CO3)2
OOxygen
O QuartzSiO2
O CalciteCaCO3
O Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
O SideriteFeCO3
O RhodochrositeMnCO3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
O K Feldspar (var: Adularia)KAlSi3O8
O MuscoviteKAl2(AlSi3O10)(OH)2
O AnkeriteCa(Fe2+,Mg)(CO3)2
O DolomiteCaMg(CO3)2
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Al K Feldspar (var: Adularia)KAlSi3O8
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Si K Feldspar (var: Adularia)KAlSi3O8
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S AguilariteAg4SeS
S SphaleriteZnS
S ChalcopyriteCuFeS2
S GalenaPbS
S PyriteFeS2
S MarcasiteFeS2
S AcanthiteAg2S
KPotassium
K Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
K K Feldspar (var: Adularia)KAlSi3O8
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca DolomiteCaMg(CO3)2
MnManganese
Mn Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
Mn RhodochrositeMnCO3
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe MarcasiteFeS2
Fe SideriteFeCO3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
SeSelenium
Se AguilariteAg4SeS
AgSilver
Ag AguilariteAg4SeS
Ag SilverAg
Ag HessiteAg2Te
Ag AcanthiteAg2S
Ag Electrum(Au,Ag)
TeTellurium
Te HessiteAg2Te
AuGold
Au Electrum(Au,Ag)
Au GoldAu
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bell, J.M., Fraser, C. (1912) The Geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Department of Mines, Geological Survey Branch, Bulletin No. 15 (New Series), New Zealand Government, Wellington, 192 pages.
Main, J.V., Rodgers, K.A., Kobe, H.W., Woods, C.P. (1972) Aguilarite from the Camoola Reef, Maratoto Valley, New Zealand. Mineralogical Magazine, 38:300, 961-964.
Main, J.V. (1979) Precious metal bearing veins of the Maratoto-Wentworth area, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 22:1, 41-51.
Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages.

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