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26°S hydrothermal field, Southern Mid-Atlantic Ridge complex, Atlantic Oceani
Regional Level Types
26°S hydrothermal fieldGroup of Hydrothermal Vents
Southern Mid-Atlantic Ridge complexMid-Ocean Ridge
Atlantic OceanOcean

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Type:
Group of Hydrothermal Vents
Mindat Locality ID:
426522
Long-form identifier:
mindat:1:2:426522:4
GUID (UUID V4):
0


The SMAR 26°S hydrothermal field is located between 25°40′S and 26°35′S on the slow-spreading Mid-Atlantic Ridge and is a sediment-free hydrothermal field mostly floored by unaltered basalt. It was discovered during the Chinese DY22nd cruise and revisited by several expeditions between 2012 and 2020.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

18 valid minerals.

Rock Types Recorded

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

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Atacamite
Formula: Cu2(OH)3Cl
ⓘ Baryte
Formula: BaSO4
ⓘ Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcanthite
Formula: CuSO4 · 5H2O
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ 'Clay minerals'
ⓘ Covellite
Formula: CuS
ⓘ 'Feldspar Group'
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Isocubanite
Formula: CuFe2S3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
ⓘ Marcasite
Formula: FeS2
References:
Meng, X., Jin, X., Li, X., Chu, F., Zhang, W., Wang, H., ... & Li, Z. (2021). Mineralogy and geochemistry of secondary minerals and oxyhydroxides from the Xunmei hydrothermal field, Southern Mid-Atlantic Ridge (26 S): Insights for metal mobilization during the oxidation of submarine sulfides. Marine Geology, 442, 106654.
Fan, L., Wang, G., Holzheid, A., Zoheir, B., Shi, X. and Lei, Q., (2022) Systematic variations in trace element composition of pyrites from the 26° S hydrothermal field, Mid-Atlantic Ridge. Ore Geology Reviews, 148, p.105006.
Yang, B., Liu, J., Li, C., Zhu, A., Wang, H., Cui, J., ... & Shi, X. (2022). Mineralogical and geochemical characteristics of near-vent metalliferous sediments: Implications for hydrothermal processes along the southern Mid-Atlantic ridge (12° S–28° S). Ore Geology Reviews, 148, 105003.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Paratacamite
Formula: Cu3(Cu,Zn)(OH)6Cl2
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘCovellite2.CA.05aCuS
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘIsocubanite2.CB.55bCuFe2S3
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 3 - Halides
ⓘAtacamite3.DA.10aCu2(OH)3Cl
ⓘParatacamite3.DA.10cCu3(Cu,Zn)(OH)6Cl2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘvar. Titanium-bearing Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
ⓘQuartz4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
ⓘBirnessite4.FL.45(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
ⓘChalcanthite7.CB.20CuSO4 · 5H2O
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Clay minerals'-
ⓘ'Feldspar Group'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

HHydrogen
Hⓘ AtacamiteCu2(OH)3Cl
Hⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Hⓘ ChalcanthiteCuSO4 · 5H2O
Hⓘ GoethiteFe3+O(OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ OpalSiO2 · nH2O
Hⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AtacamiteCu2(OH)3Cl
Oⓘ BaryteBaSO4
Oⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Oⓘ CalciteCaCO3
Oⓘ ChalcanthiteCuSO4 · 5H2O
Oⓘ GoethiteFe3+O(OH)
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ OpalSiO2 · nH2O
Oⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
Oⓘ QuartzSiO2
Oⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SSulfur
Sⓘ BaryteBaSO4
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcanthiteCuSO4 · 5H2O
Sⓘ CovelliteCuS
Sⓘ IsocubaniteCuFe2S3
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
ClChlorine
Clⓘ AtacamiteCu2(OH)3Cl
Clⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Caⓘ CalciteCaCO3
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
MnManganese
Mnⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ GoethiteFe3+O(OH)
Feⓘ IsocubaniteCuFe2S3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
Feⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
CuCopper
Cuⓘ AtacamiteCu2(OH)3Cl
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcanthiteCuSO4 · 5H2O
Cuⓘ CovelliteCuS
Cuⓘ IsocubaniteCuFe2S3
Cuⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
ZnZinc
Znⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
Znⓘ SphaleriteZnS
BaBarium
Baⓘ BaryteBaSO4

Localities in this Region

Atlantic Ocean

Other Regions, Features and Areas containing this locality

Atlantic OceanOcean

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References

Temple, Darcy M.G. (1977) Geology of the hydrothermal field at 26 [degrees] N, Mid-Atlantic Ridge: interpretations from ocean-bottom photography. Master's thesis, Texas A&M University.
Fan, L., Wang, G., Holzheid, A., Zoheir, B., Shi, X. and Lei, Q., (2022) Systematic variations in trace element composition of pyrites from the 26° S hydrothermal field, Mid-Atlantic Ridge. Ore Geology Reviews, 148, p.105006.
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