Collins Valley serpentine mine, Nelson Region, South Island, New Zealand
|Latitude & Longitude (WGS84):||41° 9' 22'' South , 173° 32' 14'' East|
|Latitude & Longitude (decimal):||-41.15619,173.53746|
|Köppen climate type:||Cfb : Temperate oceanic climate|
A quarry operating during the 1970's producing crushed serpentine for agricultural application.
The quarry is 35 kilometres by road, on a hillside above, and a few hundred metres north of State Highway 6 at the western end of Collins Valley. Serpentine was mined by Highways Construction Ltd (a subsidiary of Transport (Nelson) Ltd) between 1979-1980 for crushed lime, transported and used on farmland in the Rai Valley, a short distance to the east. The operation was uneconomic, the mine closed, and plant was dismantled.
The geology information refers to a road cut on State Highway 6, on trend, less than 500 metres south of the quarry. It is likely the quarry geology is similar.
The site is part of an ultramafic belt stretching from D'Urville Island in the north, for 90 kilometres south-west. The road cuts revealed serpentinite in contact with spilite and greywacke. The rocks are part of a steep dipping, faulted and sheared, north north-east trending zone. The serpentinite has been crushed and re-cemented, and shows as a western and eastern body, with smaller serpentinite bodies between.
The dominant rock is greywacke, as fine tuffaceous sandstone, and minor argillite, with pumpellyite flakes, prehnite veins, un-twinned albite,and minor chlorite and epidote. Microscopic small radiolarian-like orbs were seen in some of the material (?).
Spilite shows as pyroxene, or less abundant shattered titanaugite, with epidote and pumpellyite fine grained masses, and ilmenite skeletal crystals.
The serpentinite is crushed and re-cemented with hydrogrossular, with minor chromite, and magnetite. Antigorite dominates the material when tested, with prehnite and aragonite veins, with lesser chrysotile and lizardite. Minor steatite lenses and pods occur within the serpentinite, the majority consisting of talc.
There is a black amphibolite body as part of the site, consisting of green hornblende, epidote, serpentinite, euhedral titanite, and minor apatite and prehnite veins.
17 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
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
|Cenomanian - Olenekian|
93.9 - 251.2 Ma
Age: Mesozoic (93.9 - 251.2 Ma)
Stratigraphic Name: Patuki Melange
Comments: Basement (Eastern Province) melange. Age based on absolute age calculated from stratigraphic age range
Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. 
|Jurassic - Triassic|
145 - 252.17 Ma
|Mesozoic sedimentary and volcanic rocks|
Age: Mesozoic (145 - 252.17 Ma)
Stratigraphic Name: Torlesse Supergroup
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Early Jurassic - Triassic|
174.1 - 252.17 Ma
Age: Mesozoic (174.1 - 252.17 Ma)
Stratigraphic Name: Patuki Melange
Comments: Eastern Province (undifferentiated) Rocks
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.