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Laouni West intrusion, Laouni, Ahaggar Mtn (Hoggar Mtn), Tamanghasset Province, Algeriai
Regional Level Types
Laouni West intrusionIntrusion
Laouni- not defined -
Ahaggar Mtn (Hoggar Mtn)Mountain
Tamanghasset ProvinceProvince
AlgeriaCountry

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Key
Latitude & Longitude (WGS84):
20° 28' North , 5° 34' East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km
Locality type:
Köppen climate type:


The Laouni West intrusion forms one of four small intrusive massifs regrouped into the "Pan-African Laouni igneous Complex". The age of the intrusions ranges between 600 and 540 Ma. The ortho-ultrabasic cumulates are cyclic and show a succession of olivine-, chromite-, bronzite- and plagioclase-rich cumulates.

Regions containing this locality

African PlateTectonic Plate
Sahara Desert, North AfricaDesert
Northwest Africa MeteoritesMeteorite Fall Location

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


14 valid minerals.

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: C. Lemanski, Jr. (re-entry lost Mindat data).
Anorthite
Formula: Ca(Al2Si2O8)
Description: An 60
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Anorthite var: Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Description: An 60
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Description: Inclusion in picotite.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Aspidolite
Formula: NaMg3(AlSi3O10)(OH)2
Reference: C. Lemanski, Jr. (re-entry lost Mindat data).
Chromite
Formula: Fe2+Cr3+2O4
Reference: C. Lemanski, Jr. (re-entry lost Mindat data).
'Clinopyroxene Subgroup'
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Enstatite
Formula: MgSiO3
Description: En 84-91
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
'Fayalite-Forsterite Series'
Reference: C. Lemanski, Jr. (re-entry lost Mindat data).
Forsterite
Formula: Mg2SiO4
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
'Geikielite-Ilmenite Series'
Description: Ilmenite with up to 10 wt% MgO. Inclusions in intercumulus picotite (subsolidus quenching and exchange with picotite).
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Hercynite
Formula: Fe2+Al2O4
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Hercynite var: Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Ilmenite
Formula: Fe2+TiO3
Description: Xenomorpx, rimmed by phlogopite or amphibole. 5-8 wt % MgO. Infiltration of residual Ti-rich liquids in magnesian cumulate.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Kaersutite
Formula: {Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Loveringite
Formula: (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Description: Inclusions in picotite. Up to 8 wt% ZrO2.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
'Orthopyroxene Subgroup'
Reference: C. Lemanski, Jr. (re-entry lost Mindat data).
Pargasite
Formula: {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Description: Ti-pargasite.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Phlogopite var: Chromian Phlogopite
Formula: K(Mg,Cr)3(AlSi3O10)(OH)2
Description: Ti-Cr phlogopite.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Pseudobrookite
Formula: Fe2TiO5
Description: Mg-rich pseudobrookite inclusions in picotite. Ferri-armalcolite.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Rutile
Formula: TiO2
Description: Inclusions in picotite.
Reference: J.P. Lorand and J.Y. Cottin, Bull. Minéral. , 1987, 110, pp. 373-378.
Zirconolite
Formula: CaZrTi2O7
Reference: Can Miner. 25, 687-693 (1987)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Hercynite4.BB.05Fe2+Al2O4
var: Picotite4.BB.05(Fe,Mg)(Al,Cr)2O4
Ilmenite4.CB.05Fe2+TiO3
Loveringite4.CC.40(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Pseudobrookite4.CB.15Fe2TiO5
Rutile4.DB.05TiO2
Zirconolite4.DH.30CaZrTi2O7
Group 9 - Silicates
Anorthite9.FA.35Ca(Al2Si2O8)
var: Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Aspidolite9.EC.20NaMg3(AlSi3O10)(OH)2
Enstatite9.DA.05MgSiO3
Forsterite9.AC.05Mg2SiO4
Kaersutite9.DE.15{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Pargasite9.DE.15{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
var: Chromian Phlogopite9.EC.20K(Mg,Cr)3(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Geikielite-Ilmenite Series'-
'Orthopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Hercynite7.2.1.3Fe2+Al2O4
AB2X5
Pseudobrookite7.7.1.1Fe2TiO5
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
Zirconolite8.2.5.5CaZrTi2O7
AB21O38
Loveringite8.5.1.2(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
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
Enstatite65.1.2.1MgSiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Kaersutite66.1.3a.18{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Pargasite66.1.3a.12{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
Anorthite-Ca(Al2Si2O8)
var: Labradorite-(Ca,Na)[Al(Al,Si)Si2O8]
'Apatite'-Ca5(PO4)3(Cl/F/OH)
Aspidolite-NaMg3(AlSi3O10)(OH)2
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Geikielite-Ilmenite Series'-
Hercynite
var: Picotite
-(Fe,Mg)(Al,Cr)2O4
'Orthopyroxene Subgroup'-
Phlogopite
var: Chromian Phlogopite
-K(Mg,Cr)3(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
H AspidoliteNaMg3(AlSi3O10)(OH)2
OOxygen
O ForsteriteMg2SiO4
O Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
O Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
O EnstatiteMgSiO3
O Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
O Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
O PseudobrookiteFe2TiO5
O RutileTiO2
O Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
O ApatiteCa5(PO4)3(Cl/F/OH)
O IlmeniteFe2+TiO3
O AspidoliteNaMg3(AlSi3O10)(OH)2
O ChromiteFe2+Cr23+O4
O ZirconoliteCaZrTi2O7
O HercyniteFe2+Al2O4
O AnorthiteCa(Al2Si2O8)
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Na Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Na Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Na AspidoliteNaMg3(AlSi3O10)(OH)2
MgMagnesium
Mg ForsteriteMg2SiO4
Mg Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Mg EnstatiteMgSiO3
Mg Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Mg Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
Mg Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Mg AspidoliteNaMg3(AlSi3O10)(OH)2
AlAluminium
Al Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Al Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Al Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Al Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
Al Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Al AspidoliteNaMg3(AlSi3O10)(OH)2
Al HercyniteFe2+Al2O4
Al AnorthiteCa(Al2Si2O8)
SiSilicon
Si ForsteriteMg2SiO4
Si Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Si EnstatiteMgSiO3
Si Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Si Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
Si AspidoliteNaMg3(AlSi3O10)(OH)2
Si AnorthiteCa(Al2Si2O8)
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
CaCalcium
Ca Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Ca Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Ca Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Ca Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca ZirconoliteCaZrTi2O7
Ca AnorthiteCa(Al2Si2O8)
TiTitanium
Ti Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Ti PseudobrookiteFe2TiO5
Ti RutileTiO2
Ti Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Ti IlmeniteFe2+TiO3
Ti ZirconoliteCaZrTi2O7
CrChromium
Cr Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Cr Phlogopite (var: Chromian Phlogopite)K(Mg,Cr)3(AlSi3O10)(OH)2
Cr Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Cr ChromiteFe2+Cr23+O4
FeIron
Fe Hercynite (var: Picotite)(Fe,Mg)(Al,Cr)2O4
Fe PseudobrookiteFe2TiO5
Fe Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Fe IlmeniteFe2+TiO3
Fe ChromiteFe2+Cr23+O4
Fe HercyniteFe2+Al2O4
ZrZirconium
Zr Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Zr ZirconoliteCaZrTi2O7
LaLanthanum
La Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
CeCerium
Ce Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Lorand, J.-P. et al. (1987) Occurrence and petrological significance of Loveringite in the Western Laouni Layered Complex, Southern Hoggar, Algeria. Canadian Mineralogist, 25, 683-693.

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