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Comboyne Volcanic Province, Port Macquarie, Macquarie Co., New South Wales, Australiai
Regional Level Types
Comboyne Volcanic ProvinceVolcanic Province
Port Macquarie- not defined -
Macquarie Co.County
New South WalesState
AustraliaCountry

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Latitude & Longitude (WGS84):
31° 6' South , 152° 27' East
Latitude & Longitude (decimal):
-31.10000,152.45000
GeoHash:
G#: r6krj46tq
GRN:
S21E94
Type:
Volcanic Province
Köppen climate type:
Cfb : Temperate oceanic climate
Mindat Locality ID:
17628
Long-form identifier:
mindat:1:2:17628:1
GUID (UUID V4):
0


Originally had a diameter of c. 20 km, but is now very much reduced (Knutson 1989).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


12 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
ⓘ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
ⓘ Albite var. Anorthoclase
Formula: (Na,K)AlSi3O8
ⓘ Antigorite
Formula: Mg3(Si2O5)(OH)4
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Hedenbergite
Formula: CaFe2+Si2O6
ⓘ Hematite
Formula: Fe2O3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Quartz
Formula: SiO2
References:
NSW Geological Survey Report GS 1965/126
Knutson, J. 1989. Comboyne.
McDougall, I., & Wilkinson, J. F. G. (1967). Potassium?argon dates on some Cainozoic volcanic rocks from northeastern New South Wales. Journal of the Geological Society of Australia, 14(2), 225-233.
Wellman, Peter, McDougall, Ian (1974) Potassium‐argon ages on the Cainozoic volcanic rocks of New South Wales. Journal of the Geological Society of Australia, 21 (3) 247-272 doi:10.1080/00167617408728849
Knutson, J., & Green, T. H. (1975). Experimental duplication of a high-pressure megacryst/cumulate assemblage in a near-saturated hawaiite. Contributions to Mineralogy and Petrology, 52(2), 121-132.
Johnson, R. W. - Ed. (1989) Intraplate Volcanism in Eastern Australia and New Zealand. Cambridge University Press.pp.124-125
ⓘ Quartz var. Chalcedony
Formula: SiO2
ⓘ Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ⓘ Sanidine
Formula: K(AlSi3O8)
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘQuartz
var. Chalcedony		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘHedenbergite9.DA.15CaFe2+Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘRiebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ⓘAenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
ⓘAntigorite9.ED.15Mg3(Si2O5)(OH)4
ⓘSanidine9.FA.30K(AlSi3O8)
ⓘAlbite
var. Anorthoclase		9.FA.35(Na,K)AlSi3O8
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4

List of minerals for each chemical element

HHydrogen
Hⓘ AntigoriteMg3(Si2O5)(OH)4
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ OpalSiO2 · nH2O
Hⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Oⓘ AntigoriteMg3(Si2O5)(OH)4
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ HedenbergiteCaFe2+Si2O6
Oⓘ HematiteFe2O3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ OpalSiO2 · nH2O
Oⓘ QuartzSiO2
Oⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Oⓘ SanidineK(AlSi3O8)
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
MgMagnesium
Mgⓘ AntigoriteMg3(Si2O5)(OH)4
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ SanidineK(AlSi3O8)
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Siⓘ AntigoriteMg3(Si2O5)(OH)4
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ HedenbergiteCaFe2+Si2O6
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
Siⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Siⓘ SanidineK(AlSi3O8)
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
KPotassium
Kⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ SanidineK(AlSi3O8)
CaCalcium
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ HedenbergiteCaFe2+Si2O6
TiTitanium
Tiⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ HedenbergiteCaFe2+Si2O6
Feⓘ HematiteFe2O3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2

Geochronology

Mineralization age: Miocene : 16.0 Ma to 15.7 ± 0.7 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Cenozoic
  Neogene
   Miocene
ⓘ Comenditic rhyolite15.7 ± 0.7 Ma
ⓘ Trachyte (youngest age)15.9 Ma
ⓘ Trachyte (oldest age)16.0 Ma

Other Regions, Features and Areas containing this locality

Australia
Australian PlateTectonic Plate

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

NSW Geological Survey Report GS 1965/126
Knutson, J. 1989. Comboyne.
McDougall, I., & Wilkinson, J. F. G. (1967). Potassium?argon dates on some Cainozoic volcanic rocks from northeastern New South Wales. Journal of the Geological Society of Australia, 14(2), 225-233.
Wellman, Peter, McDougall, Ian (1974) Potassium‐argon ages on the Cainozoic volcanic rocks of New South Wales. Journal of the Geological Society of Australia, 21 (3) 247-272 doi:10.1080/00167617408728849
Knutson, J., & Green, T. H. (1975). Experimental duplication of a high-pressure megacryst/cumulate assemblage in a near-saturated hawaiite. Contributions to Mineralogy and Petrology, 52(2), 121-132.
Johnson, R. W. - Ed. (1989) Intraplate Volcanism in Eastern Australia and New Zealand. Cambridge University Press.pp.124-125
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
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