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Maratoto-Wentworth area, Waikato Region, New Zealandi
Regional Level Types
Maratoto-Wentworth areaArea
Waikato RegionRegion
New ZealandCountry

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Key
Latitude & Longitude (WGS84):
37° 16' 59'' South , 175° 45' 59'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


At the central Maratoto valley prospect, southern Coromandel Peninsula, New Zealand, andesite flows and dacite breccias host rare porphyry-style quartz veins that are telescoped by widespread epithermal veins and alteration.
Early porphyry-style quartz veins, which lack selvages of porphyry-style alteration, host hypersaline fluid inclusions that contain several translucent daughter crystals, including halite and sylvite.
Overprinting epithermal veins and alteration are divided into two stages. Main-stage epithermal alteration and veins are characterised by the successive deposition of pyrite, quartz, and ankerite-dolomite veinlets coupled with intense alteration of the wall rock to quartz, illite, interlayer illite-smectite (<10% smectite), chlorite, pyrite, ankerite, and dolomite. Late-stage epithermal veins and alteration are characterised by the formation of calcite and siderite veinlets, coupled with overprinting of the wall rocks by both these minerals. (Simpson, et al, 2004)

The main veins (and mines) are:
Silver Queen
Camoola
Central Maratoto
Golden Spur
United

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
Bromargyrite
Formula: AgBr
Reference: Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages.
Calcite
Formula: CaCO3
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
'Chlorite Group'
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
Dolomite
Formula: CaMg(CO3)2
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
Pyrite
Formula: FeS2
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
Quartz
Formula: SiO2
Reference: Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 3 - Halides
Bromargyrite3.AA.15AgBr
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 9 - NORMAL HALIDES
AX
Bromargyrite9.1.4.2AgBr
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
var: Illite71.2.2d.2K0.65Al2.0[Al0.65Si3.35O10](OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
H Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
C AnkeriteCa(Fe2+,Mg)(CO3)2
C DolomiteCaMg(CO3)2
OOxygen
O QuartzSiO2
O Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
O CalciteCaCO3
O AnkeriteCa(Fe2+,Mg)(CO3)2
O DolomiteCaMg(CO3)2
O MuscoviteKAl2(AlSi3O10)(OH)2
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
AlAluminium
Al Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si QuartzSiO2
Si Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S PyriteFeS2
KPotassium
K Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca DolomiteCaMg(CO3)2
FeIron
Fe PyriteFeS2
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
BrBromine
Br BromargyriteAgBr
AgSilver
Ag BromargyriteAgBr

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Mark P. Simpson , Jeffrey L. Mauk & Ross G. Kendrick (2004) Telescoped porphyry‐style and epithermal veins and alteration at the central Maratoto valley prospect, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 47:1, 39-56.
J.V. Main (1979) Precious metal bearing veins of the Maratoto-Wentworth area, Hauraki Goldfield, New Zealand. New Zealand Journal of Geology and Geophysics, 22:1, 41-51.

External Links


Other Regions, Features and Areas containing this locality

Australian PlateTectonic Plate
New Zealand

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