Te Kumi prospect, Upper Tapuaeroa Valley, Gisborne Region, New Zealandi
| Regional Level Types | |
|---|---|
| Te Kumi prospect | Prospect |
| Upper Tapuaeroa Valley | Valley |
| Gisborne Region | Region |
| New Zealand | Country |
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Latitude & Longitude (WGS84):
37° 51' 7'' South , 178° 10' 35'' East
Latitude & Longitude (decimal):
Locality type:
Age:
~145.0 to 66.0 Ma
Geologic Time:
Reference for age:
Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
KΓΆppen climate type:
Massive sulfide lenses are associated with red tuff in greywacke at Te Kumi, located in Copper Creek, a tributary of Donovan Creek (Pirajno, 1979).
The small pods of sulphide mineralisation are considered remnants of a tectonically disrupted stratabound volcanogenic massive cupriferous pyritic deposit. Un-economic. Explored by Gold Mines of New Zealand before 1979.
The sulfide lenses range up to 6.7 x 2.1 x 1.5 m in size and consist of pyrite (~80%) and chalcopyrite (~20%), with traces of sphalerite, magnetite, quartz and carbonate (Pirajno, 1979). In some lenses, the chalcopyrite has been altered to bornite and covellite.
Three prospecting drives totalling 55 m were excavated between 1917 and 1920 producing 53 tonnes of Cu-quartz ore by Donovan and Gardiner (surnames).
Analyses of dump and outcrop samples range from 0.24- 7.3% Cu (Rishworth, 1969; Pirajno, 1979). Geochemical surveys of the area defined copper anomalies at the Te Kumi prospect and in the Tapuaeroa Valley to the south (Pirajno, 1978a, 1978b). The source of the copper anomaly in the Tapuaeroa Valley appears to be malachite staining in red tuffs (Pirajno, 1979) associated with volcanic rocks in the turbidite dominated Ruatoria Group of Cretaceous age.
(Piranjo, 1979) maps the rocks as the Mokaiwi Formation, however later (Mazengarb et.al, 2000, p13) claims this is incorrect, and it is part of the Torlesse Supergroup.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
11 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 DiagramDetailed Mineral List:
| β Bornite Formula: Cu5FeS4 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Calcite Formula: CaCO3 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Chalcocite Formula: Cu2S Reference: Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages. |
| β Chalcopyrite Formula: CuFeS2 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Covellite Formula: CuS Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Magnetite Formula: Fe2+Fe3+2O4 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Malachite Formula: Cu2(CO3)(OH)2 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Nukundamite Formula: Cu3.33Fe0.66S4 Reference: Weigeli, D. (1994). Theidaite-nukundamite-bornite-ChaJcopyrite/rmetaStable solid soJution: Crystal chemistry, SuPerlattice architecture and bondjng. ι岑倧ε¦ε°ηη§ε¦η η©Άε ±ε, 20, 75-90. |
| β Pyrite Formula: FeS2 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Quartz Formula: SiO2 Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
| β Sphalerite Formula: ZnS Reference: Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
|
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Bornite | 2.BA.15 | Cu5FeS4 |
| β | Chalcocite | 2.BA.05 | Cu2S |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Covellite | 2.CA.05a | CuS |
| β | Nukundamite | 2.CA.10 | Cu3.33Fe0.66S4 |
| β | Pyrite | 2.EB.05a | FeS2 |
| β | Sphalerite | 2.CB.05a | ZnS |
| Group 4 - Oxides and Hydroxides | |||
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | β Malachite | Cu2(CO3)(OH)2 |
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Quartz | SiO2 |
| O | β Malachite | Cu2(CO3)(OH)2 |
| O | β Calcite | CaCO3 |
| O | β Magnetite | Fe2+Fe23+O4 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Chalcocite | Cu2S |
| S | β Pyrite | FeS2 |
| S | β Chalcopyrite | CuFeS2 |
| S | β Bornite | Cu5FeS4 |
| S | β Covellite | CuS |
| S | β Sphalerite | ZnS |
| S | β Nukundamite | Cu3.33Fe0.66S4 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Fe | Iron | |
| Fe | β Pyrite | FeS2 |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Bornite | Cu5FeS4 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Fe | β Nukundamite | Cu3.33Fe0.66S4 |
| Cu | Copper | |
| Cu | β Chalcocite | Cu2S |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Bornite | Cu5FeS4 |
| Cu | β Malachite | Cu2(CO3)(OH)2 |
| Cu | β Covellite | CuS |
| Cu | β Nukundamite | Cu3.33Fe0.66S4 |
| Zn | Zinc | |
| Zn | β Sphalerite | ZnS |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Pirajno, F. (1979) Geology, geochemistry, and mineralisation of a spilite-keratophyre association in Cretaceous flysch, East Cape area, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 307-328.
Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages.
Mazengarb, C., Speden, I.G. (2000) Geology of the Raukumara Area, (Explanation notes for) 1:250 000 geological map 6, Institute of Geological and Nuclear Sciences.
External Links
http://www.tandfonline.com/doi/pdf/10.1080/00288306.1979.10424101
http://www.nzpam.govt.nz/cms/pdf-library/minerals/conferences-1/358_poster_10.pdf
http://www.nzpam.govt.nz/cms/pdf-library/minerals/conferences-1/358_poster_10.pdf
Other Regions, Features and Areas containing this locality
New Zealand
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