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EPR 12° 50' N, East Pacific Rise, Pacific Oceani
Regional Level Types
EPR 12° 50' N- not defined -
East Pacific Rise- not defined -
Pacific OceanOcean

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Latitude & Longitude (WGS84): 12° 50' South , 115° 0' West
Latitude & Longitude (decimal): -12.83333,-115.00000
GeoHash:G#: 3mwnzpg83


East Pacific Rise axis, near 12° 50' N.
Deep-seated opx doleritic gabbro xenoliths within ocean floor tholeiites (pillows).

Regions containing this locality

Pacific PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

ⓘ Anorthite
Formula: Ca(Al2Si2O8)
Description: - Glassy margin of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Anorthite var: Bytownite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Description: - Glassy margin of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Anorthite var: Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Description: - Glassy margin of pillows. - Xenolithic inner zone of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: Ca-rich augite. - Glassy margin of pillows. - Xenolithic inner zone of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ 'Clinopyroxene Subgroup'
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Enstatite
Formula: MgSiO3
Description: - Xenolithic inner zone of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Forsterite
Formula: Mg2SiO4
Description: - Glassy margin of pillows. - Intermediate microlitic zone. - Xenolithic inner zone of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ 'Glass'
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Hercynite
Formula: Fe2+Al2O4
Description: - Xenolithic inner zone of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ Hercynite var: Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Description: - Xenolithic inner zone of pillows.
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.
ⓘ 'Orthopyroxene Subgroup'
Reference: R. Hekinian et al. , Bull. Minéral. , 1985, 108, pp. 691-698.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘHercynite4.BB.05Fe2+Al2O4
ⓘvar: Picotite4.BB.05(Fe,Mg)(Al,Cr)2O4
Group 9 - Silicates
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar: Bytownite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
ⓘvar: Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘEnstatite9.DA.05MgSiO3
ⓘForsterite9.AC.05Mg2SiO4
Unclassified Minerals, Rocks, etc.
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Glass'-
ⓘ'Orthopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
ⓘHercynite7.2.1.3Fe2+Al2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
ⓘForsterite51.3.1.2Mg2SiO4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
ⓘAugite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘEnstatite65.1.2.1MgSiO3
Unclassified Minerals, Mixtures, etc.
ⓘAnorthite-Ca(Al2Si2O8)
ⓘvar: Bytownite-(Ca,Na)[Al(Al,Si)Si2O8]
ⓘvar: Labradorite-(Ca,Na)[Al(Al,Si)Si2O8]
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Glass'-
ⓘHercynite
var: Picotite		-(Fe,Mg)(Al,Cr)2O4
ⓘ'Orthopyroxene Subgroup'-

List of minerals for each chemical element

OOxygen
Oⓘ ForsteriteMg2SiO4
Oⓘ Anorthite (var: Bytownite)(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ EnstatiteMgSiO3
Oⓘ Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ HercyniteFe2+Al2O4
NaSodium
Naⓘ Anorthite (var: Bytownite)(Ca,Na)[Al(Al,Si)Si2O8]
Naⓘ Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
MgMagnesium
Mgⓘ ForsteriteMg2SiO4
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ EnstatiteMgSiO3
Mgⓘ Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
AlAluminium
Alⓘ Anorthite (var: Bytownite)(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ HercyniteFe2+Al2O4
SiSilicon
Siⓘ ForsteriteMg2SiO4
Siⓘ Anorthite (var: Bytownite)(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ EnstatiteMgSiO3
Siⓘ AnorthiteCa(Al2Si2O8)
CaCalcium
Caⓘ Anorthite (var: Bytownite)(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ AnorthiteCa(Al2Si2O8)
CrChromium
Crⓘ Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Feⓘ HercyniteFe2+Al2O4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hekinian, R., Hebert, R., Maury, R.C., and Berger, E.T. (1985) Orthopyroxene-bearing gabbroic xenoliths in basalts from the East Pacific rise axis near 12° 50' N. Bulletin de Minéralogie, 108(5), 691-698.


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