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Southeastern dikes, Alexander Island, Western Antarctica, Antarcticai
Regional Level Types
Southeastern dikesGroup of Dikes
Alexander IslandIsland
Western AntarcticaRegion
AntarcticaContinent

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PhotosMapsSearch
Latitude & Longitude (WGS84):
71° 36' South , 68° 15' West
Latitude & Longitude (decimal):
Locality type:
Group of Dikes
Köppen climate type:


Several dikes cut Cretaceous sedimentary rocks close to the east coast of Alexander Island.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


4 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:

Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
Anorthite
Formula: Ca(Al2Si2O8)
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
Augite var. Titanium-bearing Augite
Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
'Fayalite-Forsterite Series'
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
'Hornblende'
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.
Kaersutite
Formula: NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Reference: Horne, R. R., & Thomson, M. R. A. (1967). Post-Aptian camptonite dykes in south-east Alexander Island. Br. Antarct. Surv. Bull, 14, 15-24. Rowley, P. D., & Smellie, J. L. (1990). Southeastern Alexander Island.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Anorthite9.FA.35Ca(Al2Si2O8)
var. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
var. Titanium-bearing Augite9.DA.15(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Kaersutite9.DE.15NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Unclassified Minerals, Rocks, etc.
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
'Fayalite-Forsterite Series'-
'Hornblende'-

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
H AnalcimeNa(AlSi2O6) · H2O
OOxygen
O Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
O Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
O KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
O AnalcimeNa(AlSi2O6) · H2O
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O AnorthiteCa(Al2Si2O8)
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
NaSodium
Na Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Na Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Na KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Na AnalcimeNa(AlSi2O6) · H2O
MgMagnesium
Mg Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Mg KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Al Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Al KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Al AnalcimeNa(AlSi2O6) · H2O
Al AnorthiteCa(Al2Si2O8)
SiSilicon
Si Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Si Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Si KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Si AnalcimeNa(AlSi2O6) · H2O
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si AnorthiteCa(Al2Si2O8)
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
CaCalcium
Ca Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Ca Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Ca KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca AnorthiteCa(Al2Si2O8)
TiTitanium
Ti Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Ti KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
FeIron
Fe Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6

Geochronology

Mineralization age: Miocene : 15 ± 1 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
ⓘ Phonolitic-tephrite15 ± 1 Ma

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Woolley A.R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe, p. 3

Other Regions, Features and Areas containing this locality

Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic 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.
 
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