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Bluff, Invercargill City, Southland Region, South Island, New Zealand

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Latitude & Longitude (WGS84): 46° 35' 51'' South , 168° 20' 9'' East
Latitude & Longitude (decimal): -46.59777,168.33611
Köppen climate type:Cfb : Temperate oceanic climate


Bluff is a small town 30 kilometres south of Invercargill, at the very southern end of the South Island. It operates as a small port, and ferries travel from here to Stewart Island.

A surprising amount of information was found for the Bluff area, and neighbouring Greenhills to the north. The area was a favourite haunt for Invercargill rock collectors during the 1970's, and specimens may appear locally from these collections in future years.

The Bluff Hill area contains the hornblende rich Bluff Hill Gabbronorite, with the Greenhills Ultramafic Complex bordering immediately to the north. The rocks trend north north-west, and dip steeply west south-west.

This is intruded by several thick andesite dykes, innumerable thin hornblende microgabbro veins and dykes, some hornblende pegmatite veins, and diorite dykes.

The hornblende rich norite shows as the upper stage differentiation of basaltic magma. Olivine-hypersthene-magnetite intergrowths indicate hypersthene from olivine by oxidation, rather than directly from the magma. The area contains widespread iron-titanium oxides, iron and copper sulphides, but none in economic quantities.



Mineral List

Mineral list contains entries from the region specified including sub-localities

18 valid minerals.

Regional Geology

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

Holocene - Late Pleistocene
0 - 0.126 Ma



ID: 1333206
OIS1 (Holocene) mining waste

Age: Pleistocene (0 - 0.126 Ma)

Description: Unconsolidated sand and gravel in old mine workings; dredge tailings and sluicings.

Comments: Holocene human-made deposits. Age based on mine plans, archaeology, beer cans and old cars

Lithology: Major:: {gravel},Minor:: {sand, clay}

Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. [13]

Permian - Early Permian
252.17 - 298.9 Ma



ID: 1308005
Bluff Intrusives Complex

Age: Permian (252.17 - 298.9 Ma)

Stratigraphic Name: Bluff Intrusives Complex

Description: Norite, gabbro, dunite and diorite with subordinate tonalite and granodiorite.

Comments: Western Province (Tuhua Intrusives) Rocks

Lithology: Norite, gabbro, dunite, diorite, tonalite, granodiorite

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. [12]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Localities in this Region

New Zealand

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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Service, H. (1937) An Intrusion of Norite and Its Accompanying Contact Metamorphism at Bluff, New Zealand. Transactions of the Royal Society NZ 67: 185-217.
Wood, B.L. (1958) Submarine Geology of Bluff Harbour, New Zealand Journal of Geology and Geophysics, 1:3, 461-469.
Lindqvist, W.F. (1965) The Geology and Ore Minerals of Bluff Hill Southland New Zealand (unpub. thesis, BSc Hons.), University of Otago.
Bosel, C.A. (1981) The geology of Bluff Hill Southland New Zealand (unpub. thesis, BSc Hons), University of Otago.
Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand, New Zealand Geological Survey Bulletin 104, 89 pages.

Mineral and/or Locality  
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