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Motukokako Island (Piercy), Cape Brett, Far North District, Northland Region, North Island, New Zealand

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Latitude & Longitude (WGS84): 35° 9' 59'' South , 174° 20' 25'' East
Latitude & Longitude (decimal): -35.16639,174.34028
GeoHash:G#: rcezznnsy
Locality type:Island
Köppen climate type:Cfb : Temperate oceanic climate


Zinc-lead skarn mineralisation in Oligocene Whangarei Limestone. The Waipapa Rocks and Whangarei Limestones are cut by a series of sub-vertical Zn-Pb-Cu bearing quartz veins. These at the northern end form skarns as prograde hedenbergite-garnet-epidote-axinite skarn, or retrograde ilvaite-babingtonite skarn. Sphalerite and galena is found disseminated in the first skarn type, and adjacent silicicified recrystallised limestone. Grades are low. Some zinc is found in the axinite, and sauconite, a zinc rich smectite. Hedenbergite, axinite, ilvaite and babingtonite are Mn rich, while epidote and garnet is Fe rich.


Mineral List


11 valid minerals.

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References

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Brathwaite, R.L., Isaac, M.J., Challis, G.A., and Brook, F.J., 1990, Tertiary limestone and Zn-Pb mineralized skarn at Motukokako, Cape Brett, Northern New Zealand: Journal of Royal Society of New Zealand, v. 20, p. 427–438.

External Links

www.gns.cri.nz/news/release/downloads/200706NorthMineralResAssessment.pdf

 
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