Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealandi
| Regional Level Types | |
|---|---|
| Coroglen (Gumtown) | - not defined - |
| Coromandel peninsula | Peninsula |
| Thames-Coromandel District | District |
| Waikato Region | Region |
| New Zealand | Country |
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Latitude & Longitude (WGS84):
36° 55' 24'' South , 175° 41' 32'' East
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Whitianga | 3,367 (2011) | 10.0km |
| Tairua | 1,588 (2011) | 17.4km |
| Pauanui | 749 (2011) | 18.6km |
| Coromandel | 1,502 (2014) | 25.1km |
| Thames | 7,136 (2014) | 27.4km |
Originally named Gumtown, a saw-mill was established here in 1864, with timber exported down the Waiwawa River to Whitianga Harbour. The mill closed in 1889, however by this stage gum digging was in full swing in the area. Diggers obtained near surface Kauri resin, which was made into varnish and linoleum. The resin is produced by the Kauri tree when damaged, and as the trees can live to one thousand years old, they can produce a lot of resin during its lifetime. This fossilised resin today is made into jewellery, and is collectible in itself as specimens, although they are not mineral specimens, despite superficial appearances.
Gold was discovered in 1898, about 15 kilometres south of Gumtown, around the head waters of the Kapowai River. The Welcome Jack, Big Beetle, Golden Reefs, and Kapowai were the main mines, although all had come to an end by 1911. All are in remote rugged heavily forested country, with difficult access. The Welcome Jack is still located on maps, while the others 2 kilometres to the east are very approximate only denoting merely the upper reaches of the river, and are likely lost localities.
Gumtown was renamed Coroglen, and now consists of a tavern, and small hall with a Sunday produce market.
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Mineral list contains entries from the region specified including sub-localities3 valid minerals.
Rock Types Recorded
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Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 Reference: Bell, J.M., Fraser, C. (1912) The geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Geological Survey, Bulletin No. 15, New Zealand Government, Wellington, 192 pages.
|
| ⓘ Gold Formula: Au Localities: Big Beetle Mine, Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand Kapowai Mine, Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand Welcome Jack Mine, Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand Reference: Bell, J.M., Fraser, C. (1912) The geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Geological Survey, Bulletin No. 15, New Zealand Government, Wellington, 192 pages.
|
| ⓘ 'Limonite' Reference: Bell, J.M., Fraser, C. (1912) The geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Geological Survey, Bulletin No. 15, New Zealand Government, Wellington, 192 pages.
|
| ⓘ Pyrite Formula: FeS2 Localities: Reference: Bell, J.M., Fraser, C. (1912) The geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Geological Survey, Bulletin No. 15, New Zealand Government, Wellington, 192 pages.
|
| ⓘ Quartz Formula: SiO2 Localities: Big Beetle Mine, Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand Kapowai Mine, Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand Welcome Jack Mine, Coroglen (Gumtown), Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand Reference: Bell, J.M., Fraser, C. (1912) The geology of the Waihi-Tairua Subdivision, Hauraki Division. New Zealand Geological Survey, Bulletin No. 15, New Zealand Government, Wellington, 192 pages.
|
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| F | Fluorine | |
| F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Ti | Titanium | |
| Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Localities in this Region
- Waikato Region
- Thames-Coromandel District
- Coromandel peninsula
- Coroglen (Gumtown)
- Coromandel peninsula
- Thames-Coromandel District
Other Regions, Features and Areas containing this locality
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