Hill 267, Stewart Island, Southland District, Southland Region, South Island, New Zealand
| Latitude & Longitude (WGS84): | 46° 52' 38'' South , 167° 50' 44'' East |
|---|---|
| Latitude & Longitude (decimal): | -46.87741,167.84567 |
| KΓΆppen climate type: | Cfb : Temperate oceanic climate |
Named after the height of the hill the mineralisation is found around. Located in central Stewart Island, half-way between Paterson Inlet and the west coast of the island.
Strongly altered and deeply weathered leucogranite is riddled with cavities. Mineralisation outcrops over a 3 square kilometre area, as part of the regional Freshwater Fault system, trending north-west to south-east across the island.
The altered granite consists of quartz, muscovite, Fe Oxides, relict pyrite and molybdenite, and molybdenite intergrown with muscovite, W, Nb, and V bearing rutile, relict magmatic zircon, monazite, and trace tourmaline. The cavities are filled with Fe oxide and quartz, with locally relict pyrite and molybdenite. The altered granite contains 2-10 times the background Ag, Cu, and Se, and 10-100 times Mo, W, and Bi compared to the unaltered granite.
There is minor local enrichment of Au, Te, Se, Sn, and Mg, although no further species is mentioned. Mineralisation was concentrated in a roof of a pluton, now expressed as the range crest. Unaltered local granite consists of coarse equigranular two feldspar I-type leuco granodiorite, and leucogranite, with minor biotite, magnetite, and trace ilmenite.
Mineral List
8 valid minerals.
Rock Types Recorded
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Alphabetical List Tree DiagramRegional 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
| Mesozoic - Paleozoic 66 - 541 Ma ID: 3188901 | Paleozoic-Mesozoic intrusive rocks Age: Phanerozoic (66 - 541 Ma) Lithology: Intrusive igneous rocks 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. [154] |
| Mississippian 323.2 - 358.9 Ma ID: 1310851 | Tobin Suite Age: Mississippian (323.2 - 358.9 Ma) Stratigraphic Name: Tobin Suite Description: Variably foliated biotite granite, leucogranite, granodiorite and tonalite. Comments: Western Province (Tuhua Intrusives) Rocks Lithology: Granite, leucogranite, granodiorite, tonalite 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] |
| Visean 330.9 - 346.7 Ma ID: 1356625 | Ruggedy Granite (Tobin Suite) Age: Mississippian (330.9 - 346.7 Ma) Stratigraphic Name: Ruggedy Granite Description: Coarse massive homogenous biotite granite and leucogranite. Comments: Basement (Median Batholith) igneous rocks. Age based on U Pb dating Lithology: Major:: {granite},Minor:: {leucogranite} Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. [13] |
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References
