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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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Latitude & Longitude (WGS84):
71° 36' South , 68° 15' West
Latitude & Longitude (decimal):
-71.60000,-68.25000
GeoHash:
G#: 47r2wvtgg
GRN:
S48W17
Type:
Group of Dikes
Köppen climate type:
EF : Ice cap climate
Mindat Locality ID:
333471
Long-form identifier:
mindat:1:2:333471:6
GUID (UUID V4):
0


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
ⓘ Anorthite
Formula: Ca(Al2Si2O8)
ⓘ Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ Augite var. Titanium-bearing Augite
Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Fayalite-Forsterite Series'
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ Kaersutite
Formula: NaCa2(Mg3AlTi4+)(Si6Al2)O22O2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘ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
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
ⓘAnalcime9.GB.05Na(AlSi2O6) · H2O
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2

List of minerals for each chemical element

HHydrogen
Hⓘ AnalcimeNa(AlSi2O6) · H2O
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
OOxygen
Oⓘ AnalcimeNa(AlSi2O6) · H2O
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Oⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ Fayalite-Forsterite Series
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naⓘ AnalcimeNa(AlSi2O6) · H2O
Naⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Naⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Naⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Mgⓘ Fayalite-Forsterite Series
Mgⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
AlAluminium
Alⓘ AnalcimeNa(AlSi2O6) · H2O
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Alⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Alⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
SiSilicon
Siⓘ AnalcimeNa(AlSi2O6) · H2O
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Siⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ Fayalite-Forsterite Series
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Caⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Caⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Tiⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Fayalite-Forsterite Series
Feⓘ Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6

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

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.

References

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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