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Ninety East Ridge (90Β° E Ridge; Indian Ridge), Indian Oceani
Regional Level Types
Ninety East Ridge (90Β° E Ridge; Indian Ridge)Ridge
Indian OceanOcean

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Type:
Ridge
Mindat Locality ID:
191809
Long-form identifier:
mindat:1:2:191809:3
GUID (UUID V4):
1fdfa15d-c326-451b-a7cd-7619d3f0d2e0


The ninetyeast Ridge is a long, linear crustal elevation rising about 2000 meters above the adjacent sea floor and striking more or less parallel to the 90Β° E meridian from south of Broken Ridge (~31Β°S) north to the Bay of Bengal (about 5600km). Believed to have been formed by the Kerguelen hot spot volcanism when the hot spot was located beneath the Indian plate during the Late Cretaceous and early Cenozoic.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

23 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:

β“˜ Albite
Formula: Na(AlSi3O8)
Description: Detritic phase.
β“˜ Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Description: Detritic phase.
β“˜ Analcime
Formula: Na(AlSi2O6) · H2O
Description: Basal Unit.
β“˜ Anatase
Formula: TiO2
β“˜ Baryte
Formula: BaSO4
β“˜ Beidellite
Formula: (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Description: Fe-rich beidellite (Upper Unit).
β“˜ Calcite
Formula: CaCO3
β“˜ Celadonite
Formula: K(MgFe3+◻)(Si4O10)(OH)2
Description: Upper and Basal Units.
β“˜ 'Chlorite Group'
Description: Basal Unit.
β“˜ Chrysotile
Formula: Mg3(Si2O5)(OH)4
β“˜ Clinoptilolite-Ca
Formula: Ca3(Si30Al6)O72 · 20H2O
Description: Upper and Middle Unit.
β“˜ Clinoptilolite-Na
Formula: Na6(Si30Al6)O72 · 20H2O
Description: Basal Unit.
β“˜ 'Clinoptilolite Subgroup'
Formula: M3-6(Si30Al6)O72 · 20H2O
β“˜ Copper
Formula: Cu
β“˜ Cristobalite
Formula: SiO2
Description: Opal CT lepispheres.
β“˜ 'Fayalite-Forsterite Series'
β“˜ 'Glass'
β“˜ 'Glauconite'
Formula: K0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
β“˜ Goethite
Formula: Ξ±-Fe3+O(OH)
β“˜ Gypsum
Formula: CaSO4 · 2H2O
β“˜ 'Iddingsite'
Formula: MgO · Fe2O3 · 3SiO2 · 4H2O
β“˜ Ilmenite
Formula: Fe2+TiO3
β“˜ 'K Feldspar'
Description: Authigenetic phase.
β“˜ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
β“˜ 'Limonite'
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
β“˜ Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Description: Middle Unit.
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Upper and Basal Units.
β“˜ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Description: Upper and Basal Units.
β“˜ Opal
Formula: SiO2 · nH2O
Description: Opal CT lepispheres.
β“˜ 'Palagonite'
β“˜ 'Phillipsite Subgroup'
Description: Upper Unit.
β“˜ Pyrite
Formula: FeS2
β“˜ Quartz
Formula: SiO2
β“˜ Saponite
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Description: Fe-rich saponite (Basal Unit).
β“˜ Saponite var. Bowlingite ?
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
β“˜ 'Smectite Group'
Formula: A0.3D2-3[T4O10]Z2 · nH2O
Description: Mixed-layer (interstratified) illite/smectite phases. Basal Unit.
β“˜ Talc
Formula: Mg3Si4O10(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Copper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
β“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Goethite4.00.Ξ±-Fe3+O(OH)
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Ilmenite4.CB.05Fe2+TiO3
β“˜Quartz4.DA.05SiO2
β“˜Opal4.DA.10SiO2 Β· nH2O
β“˜Cristobalite4.DA.15SiO2
β“˜Anatase4.DD.05TiO2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Baryte7.AD.35BaSO4
β“˜Gypsum7.CD.40CaSO4 Β· 2H2O
Group 9 - Silicates
β“˜Chrysotile9..Mg3(Si2O5)(OH)4
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Muscovite
var. Illite		9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
β“˜Celadonite9.EC.15K(MgFe3+β—»)(Si4O10)(OH)2
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Beidellite9.EC.40(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 Β· nH2O
β“˜Saponite9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 Β· nH2O
β“˜var. Bowlingite ?9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 Β· nH2O
β“˜Albite
var. Andesine		9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
β“˜9.FA.35Na(AlSi3O8)
β“˜Analcime9.GB.05Na(AlSi2O6) Β· H2O
β“˜Mordenite9.GD.35(Na2,Ca,K2)4(Al8Si40)O96 Β· 28H2O
β“˜Clinoptilolite-Ca9.GE.05Ca3(Si30Al6)O72 Β· 20H2O
β“˜Clinoptilolite-Na9.GE.05Na6(Si30Al6)O72 Β· 20H2O
Unclassified
β“˜'K Feldspar'-
β“˜'Fayalite-Forsterite Series'-
β“˜'Smectite Group'-A0.3D2-3[T4O10]Z2 Β· nH2O
β“˜'Glass'-
β“˜'K Feldspar
var. Adularia'		-KAlSi3O8
β“˜'Limonite'-
β“˜'Iddingsite'-MgO Β· Fe2O3 Β· 3SiO2 Β· 4H2O
β“˜'Phillipsite Subgroup'-
β“˜'Glauconite'-K0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
β“˜'Clinoptilolite Subgroup'-M3-6(Si30Al6)O72 Β· 20H2O
β“˜'Chlorite Group'-
β“˜'Palagonite'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ AnalcimeNa(AlSi2O6) · H2O
Hβ“˜ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Hβ“˜ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Hβ“˜ ChrysotileMg3(Si2O5)(OH)4
Hβ“˜ Clinoptilolite SubgroupM3-6(Si30Al6)O72 · 20H2O
Hβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Hβ“˜ GoethiteΞ±-Fe3+O(OH)
Hβ“˜ GypsumCaSO4 · 2H2O
Hβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ Clinoptilolite-CaCa3(Si30Al6)O72 · 20H2O
Hβ“˜ Clinoptilolite-NaNa6(Si30Al6)O72 · 20H2O
Hβ“˜ IddingsiteMgO · Fe2O3 · 3SiO2 · 4H2O
Hβ“˜ Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
Hβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ K Feldspar var. AdulariaKAlSi3O8
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AnalcimeNa(AlSi2O6) · H2O
Oβ“˜ AnataseTiO2
Oβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Oβ“˜ BaryteBaSO4
Oβ“˜ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Oβ“˜ CalciteCaCO3
Oβ“˜ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Oβ“˜ ChrysotileMg3(Si2O5)(OH)4
Oβ“˜ Clinoptilolite SubgroupM3-6(Si30Al6)O72 · 20H2O
Oβ“˜ CristobaliteSiO2
Oβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Oβ“˜ GoethiteΞ±-Fe3+O(OH)
Oβ“˜ GypsumCaSO4 · 2H2O
Oβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oβ“˜ IlmeniteFe2+TiO3
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ QuartzSiO2
Oβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ Clinoptilolite-CaCa3(Si30Al6)O72 · 20H2O
Oβ“˜ Clinoptilolite-NaNa6(Si30Al6)O72 · 20H2O
Oβ“˜ IddingsiteMgO · Fe2O3 · 3SiO2 · 4H2O
Oβ“˜ Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
Oβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ AnalcimeNa(AlSi2O6) · H2O
Naβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Naβ“˜ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Naβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Naβ“˜ Clinoptilolite-NaNa6(Si30Al6)O72 · 20H2O
MgMagnesium
Mgβ“˜ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Mgβ“˜ ChrysotileMg3(Si2O5)(OH)4
Mgβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Mgβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Mgβ“˜ TalcMg3Si4O10(OH)2
Mgβ“˜ IddingsiteMgO · Fe2O3 · 3SiO2 · 4H2O
Mgβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
AlAluminium
Alβ“˜ K Feldspar var. AdulariaKAlSi3O8
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AnalcimeNa(AlSi2O6) · H2O
Alβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Alβ“˜ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Alβ“˜ Clinoptilolite SubgroupM3-6(Si30Al6)O72 · 20H2O
Alβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Alβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Alβ“˜ Clinoptilolite-CaCa3(Si30Al6)O72 · 20H2O
Alβ“˜ Clinoptilolite-NaNa6(Si30Al6)O72 · 20H2O
Alβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
SiSilicon
Siβ“˜ K Feldspar var. AdulariaKAlSi3O8
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AnalcimeNa(AlSi2O6) · H2O
Siβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Siβ“˜ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Siβ“˜ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Siβ“˜ ChrysotileMg3(Si2O5)(OH)4
Siβ“˜ Clinoptilolite SubgroupM3-6(Si30Al6)O72 · 20H2O
Siβ“˜ CristobaliteSiO2
Siβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Siβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ QuartzSiO2
Siβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ Clinoptilolite-CaCa3(Si30Al6)O72 · 20H2O
Siβ“˜ Clinoptilolite-NaNa6(Si30Al6)O72 · 20H2O
Siβ“˜ IddingsiteMgO · Fe2O3 · 3SiO2 · 4H2O
Siβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
SSulfur
Sβ“˜ BaryteBaSO4
Sβ“˜ GypsumCaSO4 · 2H2O
Sβ“˜ PyriteFeS2
KPotassium
Kβ“˜ K Feldspar var. AdulariaKAlSi3O8
Kβ“˜ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Kβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Kβ“˜ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Caβ“˜ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Caβ“˜ CalciteCaCO3
Caβ“˜ GypsumCaSO4 · 2H2O
Caβ“˜ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Caβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Caβ“˜ Clinoptilolite-CaCa3(Si30Al6)O72 · 20H2O
Caβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
TiTitanium
Tiβ“˜ AnataseTiO2
Tiβ“˜ IlmeniteFe2+TiO3
FeIron
Feβ“˜ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Feβ“˜ GlauconiteK0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Feβ“˜ GoethiteΞ±-Fe3+O(OH)
Feβ“˜ IlmeniteFe2+TiO3
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ PyriteFeS2
Feβ“˜ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Feβ“˜ IddingsiteMgO · Fe2O3 · 3SiO2 · 4H2O
Feβ“˜ Saponite var. BowlingiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
CuCopper
Cuβ“˜ CopperCu
BaBarium
Baβ“˜ BaryteBaSO4

Localities in this Region

Indian Ocean

Other Regions, Features and Areas containing this locality

Indian 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

Krishna, K. S., Abraham, H., Sager, W. W., Pringle, M. S., Frey, F., Gopala Rao, D., & Levchenko, O. V. (2012). Tectonics of the Ninetyeast Ridge derived from spreading records in adjacent oceanic basins and age constraints of the ridge. Journal of Geophysical Research: Solid Earth, 117(B4).
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