Mount Radiant, Karamea, Buller District, West Coast Region, South Island, New Zealand
|Latitude & Longitude (WGS84):||41° 22' South , 172° 13' East|
|Latitude & Longitude (decimal):||-41.36667,172.21667|
|Köppen climate type:||Cfb : Temperate oceanic climate|
Porphyry molybdenum deposit 20 km to the southeast of Karamea.
Fracture controlled quartz-sulphide veins forming reefs,with minor disseminated sulphides within the surrounding granite and adamellite contact, with hornfelsed and schistose metasediments.
The quartz reefs contain molybdenite, pyrite, chalcopyrite, bornite, tetrahedrite and Bi minerals, with quartz, orthoclase, and muscovite as gangue. The Anaconda Reef is 5 kilometres to the north and is similar except chalcopyrite is more prevalent, and molybdenum less so.
There are twenty separate lenticular quartz lodes, and quartz stock work areas, on the north side of Mount Radiant (exposed in Silver Creek), extending north to Mount Anaconda (exposed in Specimen Creek), and Mount Scarlett. Most of the lodes strike north north-east, and a few north-west. The mineralisation is associated with intrusions of alkali porphyritic granites, granodiorites and pegmatite veins into older gneisses, and coarse grained granites of the Karamea Suite, and into a roof pendant of hornfelsed and schistose metasediments.
Each of the reefs are a series of parallel quartz veins separated by country rock. Some lodes contain silver and gold. Wall rock is altered to quartz, sericite and chlorite along the vein margins.
The Mount Radiant lodes were discovered in 1904, the others by 1910. An attempt to mine the Mount Radiant lodes via an underground working was made across 1914-1915, but there was no ore production.
11 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Calabrian - Zanclean|
0.781 - 5.333 Ma
|Undifferentiated Upper Blue Bottom Subgroup mudstone|
Age: Cenozoic (0.781 - 5.333 Ma)
Stratigraphic Name: Blue Bottom Group; Upper Blue Bottom Subgroup
Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. 
|Pliocene - Late Miocene|
2.588 - 11.62 Ma
|Blue Bottom Group (Pliocene)|
Age: Neogene (2.588 - 11.62 Ma)
Stratigraphic Name: Maui Supergroup; Blue Bottom Group; Blue Bottom Group (Pliocene)
Reference: Edbrooke, S.W., Heron, D.W., Forsyth, P.J., Jongens, R. (compilers). Geology Map of New Zealand 1:1 000 000. GNS Science Geological Map 2.