Ohakuri prospect, Taupo District, Waikato Region, New Zealandi
| Regional Level Types | |
|---|---|
| Ohakuri prospect | Prospect |
| Taupo District | District |
| Waikato Region | Region |
| New Zealand | Country |
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Latitude & Longitude (WGS84):
38° 24' 29'' South , 176° 5' 15'' East
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Gold-silver epithermal prospect 30 km north of Taupo. Quartz-adularia altered pumiceous ignimbrite.
The prospect was discovered in the 1970's when the Ohakuri Dam was built. Indications are the prospect is very near the southern side of the dam wall. It has been explored since by several companies including BP Minerals, Amoco, Cyprus, Delta Gold, Coeur Gold, GCO, and Glass Earth Ltd, finding only low grades of gold.
Two forms of gold mineralisation have been uncovered being (1) gold associated with thin (under 20 mms) weakly banded quartz sulphide veins, and (2) gold associated with the mixing of near surface cool water with deeper chloride waters.
Various clays are mentioned in the area including kaolinite, smectite, illite, as well as chlorite, mordenite and sericite (Royalty Corp).
Further anomalies have been found called Ohakuri North, East and West (and South but it is unclear if they are referring to the main Ohakuri prospect), but none have shown any promise.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Acanthite Formula: Ag2S Reference: Terry Leach and Gold in New Zealand β Turning Concepts into Targets P Grieve Terry Leach Symposium 17 October 2008 |
| β Gold Formula: Au Reference: Christie, A. B., and R. L. Brathwaite. "Epithermal gold-silver deposits in New Zealand: a new wall poster." GNS Science; Christie, A. B., & Brathwaite, R. L. (1997). Mineral commodity report 14-gold. New Zealand Mining, 21, 21-40. |
| β Gold var. Electrum Formula: (Au,Ag) Reference: Terry Leach and Gold in New Zealand β Turning Concepts into Targets P Grieve Terry Leach Symposium 17 October 2008 |
| β 'K Feldspar' Formula: KAlSi3O8 Reference: Christie, A. B., & Brathwaite, R. L. (1997). Mineral commodity report 14-gold. New Zealand Mining, 21, 21-40. |
| β 'K Feldspar var. Adularia' Formula: KAlSi3O8 Reference: Christie, A. B., & Brathwaite, R. L. (1997). Mineral commodity report 14-gold. New Zealand Mining, 21, 21-40. |
| β Mordenite Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O Reference: Rowland, J & Simmons, F. (2012). Hydrologic, Magmatic, and Tectonic Controls on Hydrothermal Flow, Taupo Volcanic Zone, New Zealand: Implications for the Formation of Epithermal Vein Deposits. Economic Geology. 107. 10.2113/econgeo.107.3.427. |
| β Pyrite Formula: FeS2 Reference: Terry Leach and Gold in New Zealand β Turning Concepts into Targets P Grieve Terry Leach Symposium 17 October 2008 |
| β Quartz Formula: SiO2 Reference: Terry Leach and Gold in New Zealand β Turning Concepts into Targets P Grieve Terry Leach Symposium 17 October 2008; Christie, A. B., & Brathwaite, R. L. (1997). Mineral commodity report 14-gold. New Zealand Mining, 21, 21-40. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Gold | 1.AA.05 | Au |
| β | var. Electrum | 1.AA.05 | (Au,Ag) |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Acanthite | 2.BA.35 | Ag2S |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| β | Mordenite | 9.GD.35 | (Na2,Ca,K2)4(Al8Si40)O96 Β· 28H2O |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'K Feldspar' | - | KAlSi3O8 |
| β | 'var. Adularia' | - | KAlSi3O8 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| O | Oxygen | |
| O | β K Feldspar var. Adularia | KAlSi3O8 |
| O | β Quartz | SiO2 |
| O | β K Feldspar | KAlSi3O8 |
| O | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Na | Sodium | |
| Na | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Al | Aluminium | |
| Al | β K Feldspar var. Adularia | KAlSi3O8 |
| Al | β K Feldspar | KAlSi3O8 |
| Al | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Si | Silicon | |
| Si | β K Feldspar var. Adularia | KAlSi3O8 |
| Si | β Quartz | SiO2 |
| Si | β K Feldspar | KAlSi3O8 |
| Si | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| S | Sulfur | |
| S | β Pyrite | FeS2 |
| S | β Acanthite | Ag2S |
| K | Potassium | |
| K | β K Feldspar var. Adularia | KAlSi3O8 |
| K | β K Feldspar | KAlSi3O8 |
| K | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Ca | Calcium | |
| Ca | β Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Fe | Iron | |
| Fe | β Pyrite | FeS2 |
| Ag | Silver | |
| Ag | β Acanthite | Ag2S |
| Ag | β Gold var. Electrum | (Au,Ag) |
| Au | Gold | |
| Au | β Gold | Au |
| Au | β Gold var. Electrum | (Au,Ag) |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Glass Earth Limited (2007) Glass Earth Ltd: Gold exploration update cont'd-Central-North Island New Zealand (media Release).
Grieve, P. (2008) Terry Leach and Gold in New Zealand - turning concepts into targets, Terry Leach Symposium, 17 October 2008.
EMX Royalty Corp, Okahuri PDF (shareholder presentation).
External Links
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Ohakuri prospect, Taupo District, Waikato Region, New Zealand