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Ohio Creek prospect (Ohio Stream), Tararu, Thames-Coromandel District, Waikato Region, New Zealandi
Regional Level Types
Ohio Creek prospect (Ohio Stream)Creek
Tararu- not defined -
Thames-Coromandel DistrictDistrict
Waikato RegionRegion
New ZealandCountry

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Latitude & Longitude (WGS84):
37° 6' 4'' South , 175° 33' 20'' East
Latitude & Longitude (decimal):
-37.10127,175.55574
GeoHash:
G#: rckufvgv3
GRN:
S25E101
Type:
Creek
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Thames7,136 (2014)4.3km
Ngatea1,151 (2011)20.8km
Kerepehi537 (2011)22.2km
Tairua1,588 (2011)27.7km
Pauanui749 (2011)29.1km
Mindat Locality ID:
15450
Long-form identifier:
mindat:1:2:15450:8
GUID (UUID V4):
620118b4-ac59-4f8f-9530-49fe6f7ab225


Cu-Au-Mo prospect.

Centred on, and named after Ohio Stream, 3 kilometres north north-east of Thames. Geological speaking the area covered by the prospect is poorly constrained, with some of the references also describing neighbouring historic gold mines, which will be listed separately where enough information is found.

The prospect occupies a jog in the Hauraki graben fault, shared with other deposits in the Thames area. Dextral rotation with associated plate rotation, produced a series of dilational fractures hosting sulphidation alteration of the Ohio Stream porphyry, with more distal auriferous mesothermal veins.

There is progressive alteration zoning north-west to south east covering propylitic (epidote-chlorite); intermediate argillic (chlorite-sericite); phyllic (sericite-quartz); advanced argillic (pyrophyllite-diaspore-quartz); silicified ledges with progressively more abundant alunite; argillic (dickite, kaolinite, illite); and low grade propylitic (chlorite, carbonate, illite).

The porphyry deposit and intrusive breccia is altered to a core of potassic K feldspar-magnetite-biotite, with surrounding propylitic quartz-chlorite and epidote-pyrite calcite alteration, both overprinted by quartz-sericite-pyrite or chlorite-sericite alteration.

Lookout Rocks on the north-east border of the prospect contains a narrow core zone of quartz-alunite-dickite grading outwards to an extensive pyrophyllite-dickite-diaspore-kaolinite zone, that overlaps the upper part of the phyllic alteration zone of the Ohio Stream porphyry Cu-Au-Mo deposit.

The dacite porphyry and surrounding the intrusion contains thin quartz-anhydrite-carbonate stock work veins containing disseminated sulphides such as pyrite, molybdenite, galena, sphalerite, tetrahedrite, and chalcopyrite. Mineralisation is overall low grade with 0.12-0.20% Cu, and 0.23-0.4 g/t Au, with a vertical extent greater than 600 metres. Other minerals present which are noted are magnetite, rutile, hematite, bornite, covellite, enargite.

The veins trend sub-parallel north-east across 4 x 2 kilometres contain ore assemblages of (1) quartz-pyrite-electrum-pyrargyrite locally bonanza grades; (2) quartz-sulphides-tellurides (Au, Ag, Bi).




Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


25 valid minerals.

Rock Types Recorded

Note: 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:

β“˜ Aikinite
Formula: PbCuBiS3
β“˜ Alunite
Formula: KAl3(SO4)2(OH)6
β“˜ Andalusite
Formula: Al2(SiO4)O
β“˜ Anhydrite
Formula: CaSO4
β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Bornite
Formula: Cu5FeS4
β“˜ Calcite
Formula: CaCO3
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ 'Chlorite Group'
β“˜ Covellite
Formula: CuS
β“˜ Diaspore
Formula: AlO(OH)
β“˜ Dickite
Formula: Al2(Si2O5)(OH)4
β“˜ Enargite
Formula: Cu3AsS4
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜ Galena
Formula: PbS
β“˜ Gold
Formula: Au
β“˜ Gold var. Electrum
Formula: (Au,Ag)
β“˜ Hematite
Formula: Fe2O3
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
β“˜ 'K Feldspar'
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
β“˜ Molybdenite
Formula: MoS2
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
β“˜ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Pyrargyrite
Formula: Ag3SbS3
β“˜ Pyrite
Formula: FeS2
β“˜ Pyrophyllite
Formula: Al2Si4O10(OH)2
β“˜ Quartz
Formula: SiO2
β“˜ Rutile
Formula: TiO2
β“˜ Sphalerite
Formula: ZnS
β“˜ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
β“˜ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Gold
var. Electrum		1.AA.05(Au,Ag)
β“˜1.AA.05Au
Group 2 - Sulphides and Sulfosalts
β“˜Bornite2.BA.15Cu5FeS4
β“˜Covellite2.CA.05aCuS
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Galena2.CD.10PbS
β“˜Molybdenite2.EA.30MoS2
β“˜Pyrite2.EB.05aFeS2
β“˜Pyrargyrite2.GA.05Ag3SbS3
β“˜'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
β“˜Aikinite2.HB.05aPbCuBiS3
β“˜Enargite2.KA.05Cu3AsS4
Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
β“˜Diaspore4.FD.10AlO(OH)
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Anhydrite7.AD.30CaSO4
β“˜Alunite7.BC.10KAl3(SO4)2(OH)6
Group 9 - Silicates
β“˜Andalusite9.AF.10Al2(SiO4)O
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Pyrophyllite9.EC.10Al2Si4O10(OH)2
β“˜Muscovite
var. Sericite		9.EC.15KAl2(AlSi3O10)(OH)2
β“˜var. Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
β“˜9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Kaolinite9.ED.05Al2(Si2O5)(OH)4
β“˜Dickite9.ED.05Al2(Si2O5)(OH)4
Unclassified
β“˜'K Feldspar'-
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
β“˜'Chlorite Group'-
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hβ“˜ AluniteKAl3(SO4)2(OH)6
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ DiasporeAlO(OH)
Hβ“˜ DickiteAl2(Si2O5)(OH)4
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ PyrophylliteAl2Si4O10(OH)2
Hβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
BBoron
Bβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ AluniteKAl3(SO4)2(OH)6
Oβ“˜ AndalusiteAl2(SiO4)O
Oβ“˜ AnhydriteCaSO4
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ CalciteCaCO3
Oβ“˜ DiasporeAlO(OH)
Oβ“˜ DickiteAl2(Si2O5)(OH)4
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ HematiteFe2O3
Oβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ PyrophylliteAl2Si4O10(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ AluniteKAl3(SO4)2(OH)6
Alβ“˜ AndalusiteAl2(SiO4)O
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ DiasporeAlO(OH)
Alβ“˜ DickiteAl2(Si2O5)(OH)4
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ PyrophylliteAl2Si4O10(OH)2
Alβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ AndalusiteAl2(SiO4)O
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ DickiteAl2(Si2O5)(OH)4
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ PyrophylliteAl2Si4O10(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
PPhosphorus
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sβ“˜ AikinitePbCuBiS3
Sβ“˜ AluniteKAl3(SO4)2(OH)6
Sβ“˜ AnhydriteCaSO4
Sβ“˜ BorniteCu5FeS4
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ CovelliteCuS
Sβ“˜ EnargiteCu3AsS4
Sβ“˜ GalenaPbS
Sβ“˜ MolybdeniteMoS2
Sβ“˜ PyrargyriteAg3SbS3
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
Sβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ClChlorine
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kβ“˜ AluniteKAl3(SO4)2(OH)6
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ AnhydriteCaSO4
Caβ“˜ CalciteCaCO3
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ RutileTiO2
FeIron
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ BorniteCu5FeS4
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ PyriteFeS2
CuCopper
Cuβ“˜ AikinitePbCuBiS3
Cuβ“˜ BorniteCu5FeS4
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ CovelliteCuS
Cuβ“˜ EnargiteCu3AsS4
Cuβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znβ“˜ SphaleriteZnS
AsArsenic
Asβ“˜ EnargiteCu3AsS4
MoMolybdenum
Moβ“˜ MolybdeniteMoS2
AgSilver
Agβ“˜ Gold var. Electrum(Au,Ag)
Agβ“˜ PyrargyriteAg3SbS3
SbAntimony
Sbβ“˜ PyrargyriteAg3SbS3
Sbβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
AuGold
Auβ“˜ Gold var. Electrum(Au,Ag)
Auβ“˜ GoldAu
PbLead
Pbβ“˜ AikinitePbCuBiS3
Pbβ“˜ GalenaPbS
BiBismuth
Biβ“˜ AikinitePbCuBiS3

Other Regions, Features and Areas containing this locality

Australian PlateTectonic Plate
New Zealand
Pacific OceanOcean

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

Christie, T., Brathwaite, B. Mineral Commodity Report 4- Copper, Institute of Geological and Nuclear Science Limited.
Railton, G. T., Watters, W. A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104. New Zealand Geological Survey
Corbett, G.J., Leach, T.M. (1996) South-West Pacific Rim Gold-Copper Systems: structure alteration and mineralization, Workshop Manual. Manual for an exploration short course presented in Philippines, November 1996.
Christie, A.B., 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.
Simpson, M.P., Mauk, J.L., Merchant, R. (2011) Bonanza grade epithermal veins from the Coromandel and Thames districts Hauraki Goldfield, Proceedings 2011 AusiMM New Zealand branch annual conference, 27-30 August, Queenstown, New Zealand.
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