Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Southern Mid-Atlantic Ridge complex, Atlantic Oceani
Regional Level Types
Southern Mid-Atlantic Ridge complexMid-Ocean Ridge
Atlantic OceanOcean

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
Type:
Mid-Ocean Ridge
Mindat Locality ID:
426546
Long-form identifier:
mindat:1:2:426546:0
GUID (UUID V4):
0


Mid Atlantic Ridge south of the Romanche Trench near the equator.

The Rio de Janeiro Fracture Transform valley at 22°S is the deepest cross-passage on the SMAR, and the southward progression of the north Atlantic deep waters is interrupted above this region. This fracture coincides with a gap in the distribution of hydrothermal fields between 19°S and 23°S the topographically-controlled hydrography and sparse distribution of active vents in the 19°S–23°S region indicate a physical barrier. Therefore, the Rio de Janeiro Fracture Transform can be used to divide SMAR into a northern and a southern segment.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

29 valid minerals.

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Anhydrite
Formula: CaSO4
ⓘ Atacamite
Formula: Cu2(OH)3Cl
ⓘ Baryte
Formula: BaSO4
ⓘ Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
ⓘ Calcite
Formula: CaCO3
Localities: Reported from at least 6 localities in this region.
ⓘ Chalcanthite
Formula: CuSO4 · 5H2O
ⓘ Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 8 localities in this region.
ⓘ 'Chlorite Group'
Localities: Reported from at least 6 localities in this region.
ⓘ Chrysotile
Formula: Mg3(Si2O5)(OH)4
ⓘ 'Clay minerals'
ⓘ Covellite
Formula: CuS
ⓘ 'Feldspar Group'
ⓘ Galena
Formula: PbS
ⓘ Goethite
Formula: Fe3+O(OH)
Localities: Reported from at least 6 localities in this region.
ⓘ Gratonite
Formula: Pb9As4S15
ⓘ Hematite
Formula: Fe2O3
ⓘ Isocubanite
Formula: CuFe2S3
Localities: Reported from at least 6 localities in this region.
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ Lizardite
Formula: Mg3(Si2O5)(OH)4
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
ⓘ Marcasite
Formula: FeS2
Localities: Reported from at least 6 localities in this region.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ Native Sulphur
Formula: S8
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Paratacamite
Formula: Cu3(Cu,Zn)(OH)6Cl2
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Pyrite
Formula: FeS2
Localities: Reported from at least 10 localities in this region.
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ 'Smectite Group'
Formula: A0.3D2-3[T4O10]Z2 · nH2O
ⓘ Sphalerite
Formula: ZnS
Localities: Reported from at least 8 localities in this region.
ⓘ Sphalerite var. Marmatite
Formula: (Zn,Fe)S
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Wurtzite
Formula: (Zn,Fe)S

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
ⓘCovellite2.CA.05aCuS
ⓘSphalerite2.CB.05aZnS
ⓘvar. Marmatite2.CB.05a(Zn,Fe)S
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘWurtzite2.CB.45(Zn,Fe)S
ⓘIsocubanite2.CB.55bCuFe2S3
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘGratonite2.JB.55Pb9As4S15
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
ⓘHematite4.CB.05Fe2O3
ⓘ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
ⓘAnhydrite7.AD.30CaSO4
ⓘBaryte7.AD.35BaSO4
ⓘChalcanthite7.CB.20CuSO4 · 5H2O
Group 9 - Silicates
ⓘChrysotile9.00.Mg3(Si2O5)(OH)4
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite
var. Illite		9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘLizardite9.ED.15Mg3(Si2O5)(OH)4
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Clay minerals'-
ⓘ'Feldspar Group'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Smectite Group'-A0.3D2-3[T4O10]Z2 · nH2O
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4

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ⓘ ChrysotileMg3(Si2O5)(OH)4
Hⓘ GoethiteFe3+O(OH)
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ LizarditeMg3(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ OpalSiO2 · nH2O
Hⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnhydriteCaSO4
Oⓘ AtacamiteCu2(OH)3Cl
Oⓘ BaryteBaSO4
Oⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Oⓘ CalciteCaCO3
Oⓘ ChalcanthiteCuSO4 · 5H2O
Oⓘ ChrysotileMg3(Si2O5)(OH)4
Oⓘ GoethiteFe3+O(OH)
Oⓘ HematiteFe2O3
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ LizarditeMg3(Si2O5)(OH)4
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ OpalSiO2 · nH2O
Oⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
Oⓘ QuartzSiO2
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ ChrysotileMg3(Si2O5)(OH)4
Mgⓘ LizarditeMg3(Si2O5)(OH)4
Mgⓘ TalcMg3Si4O10(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ ChrysotileMg3(Si2O5)(OH)4
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ LizarditeMg3(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
SSulfur
Sⓘ AnhydriteCaSO4
Sⓘ BaryteBaSO4
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcanthiteCuSO4 · 5H2O
Sⓘ CovelliteCuS
Sⓘ GalenaPbS
Sⓘ GratonitePb9As4S15
Sⓘ IsocubaniteCuFe2S3
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ Native SulphurS8
Sⓘ Wurtzite(Zn,Fe)S
Sⓘ Sphalerite var. Marmatite(Zn,Fe)S
ClChlorine
Clⓘ AtacamiteCu2(OH)3Cl
Clⓘ ParatacamiteCu3(Cu,Zn)(OH)6Cl2
KPotassium
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnhydriteCaSO4
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ⓘ HematiteFe2O3
Feⓘ IsocubaniteCuFe2S3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Feⓘ Wurtzite(Zn,Fe)S
Feⓘ Sphalerite var. Marmatite(Zn,Fe)S
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
Znⓘ Wurtzite(Zn,Fe)S
Znⓘ Sphalerite var. Marmatite(Zn,Fe)S
AsArsenic
Asⓘ GratonitePb9As4S15
BaBarium
Baⓘ BaryteBaSO4
PbLead
Pbⓘ GalenaPbS
Pbⓘ GratonitePb9As4S15

Localities in this Region

Atlantic Ocean
Atlantic Ocean

Other Regions, Features and Areas containing this locality

Atlantic OceanOcean

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

Ciążela, J., Kozłowska-Roman, A., Tomczak, M., Elsherif, E., Wojtulek, P. (2023): Conditions for larger SMS deposits along slow-spread mid-ocean ridges: implications for the Polish contract area at the MAR. 9th Meeting of the Mineralogical Society of Poland / 28th Meeting of the Petrology group of the Mineralogical Society of Poland, "Oceanic lithosphere: rocks, minerals, and critical resources", October 19-22, Bielawa, Poland. Mineralogia - Special Papers, 51, 47.
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.
Quick NavTopMineral ListRock TypesLocalities in RegionOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: October 20, 2026 03:02:31 Page updated: July 26, 2026 22:24:04
Go to top of page