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Jabal Aja Complex, Ha'il Region, Saudi Arabiai
Regional Level Types
Jabal Aja ComplexComplex
Ha'il RegionRegion
Saudi ArabiaCountry

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Latitude & Longitude (WGS84):
27° 33' 0'' North , 41° 28' 59'' East
Latitude & Longitude (decimal):
27.55000,41.48333
GRN:
N19E27
Type:
Complex
Age:
570 ± 19 Ma
Geologic Time:
Ediacaran
Dating method:
Th-Pb isochron
Reference for age:
Stuckless, J. S., Hedge, C. E., Wenner, D. B., & Nkomo, I. T. (1985). Isotopic studies of postorogenic granites from the northeastern Arabian Shield, Kingdom of Saudi Arabia. United States Geological Survey, Open File Report 85-126.
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
341882
Long-form identifier:
mindat:1:2:341882:9
GUID (UUID V4):
0
Other Languages:
View 1 more...
Arabic:
محمية جبل آجا, منطقة حائل, السعودية


Large peralkaline, post-orogenic body that forms an elliptical intrusion of c. 80 x 20km. There is an outer ring of peralkaline granite with a complex core of granophyre and micrographic granite, within which is a 5km long xenolith of comenditic rhyolites; peralkaline rhyolites partially cap the complex.

Includes highly mineralized, pink pegmatites, rich in Nb, Ta, Y, Zr, Hf, U, and REE (Th included). In addition to REE-rich minerals, a (Sc,Y,◻)-rich pyroxenoid is described from such pegmatites by Gahlan et al. (2021). The bustamite from this pegmatite is also vacancy rich and has excess, VISi.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


20 valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
References:
du Bray, E.A. & Stoeser, D.B. 1985. Reconnaisance Geology of the Al Hufayr Quadrangle, Sheet 27/41A, Kingdom of Saudi Arabia. United States Geological Survey, Open-File Report 85-14.
Stuckless, J. S., Hedge, C. E., Wenner, D. B., & Nkomo, I. T. (1985). Isotopic studies of postorogenic granites from the northeastern Arabian Shield, Kingdom of Saudi Arabia. United States Geological Survey, Open File Report 85-126.
Harris, N. B. W. (1985). Alkaline complexes from the Arabian Shield. Journal of African Earth Sciences (1983), 3(1-2), 83-88.
Aleinikoff, J. N., & Stoeser, D. B. (1988). Zircon morphology and U-Pb geochronology of seven metaluminous and peralkaline post-orogenic granite complexes of the Arabian Shield, Kingdom of Saudi Arabia (No. 88-604). US Geological Survey.
Qadhi, Talal M (2007) Geochemical Evolution of Rare Metal-Bearing A-Type Granites from the Aja Batholith, Hail Terrain, Saudi Arabia. Journal of the Geological Society of India, 70 (5). 714-729 doi:10.17491/jgsi/2007/700504
ⓘ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ 'Alkali Feldspar'
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
References:
du Bray, E.A. & Stoeser, D.B. 1985. Reconnaisance Geology of the Al Hufayr Quadrangle, Sheet 27/41A, Kingdom of Saudi Arabia. United States Geological Survey, Open-File Report 85-14.
Stuckless, J. S., Hedge, C. E., Wenner, D. B., & Nkomo, I. T. (1985). Isotopic studies of postorogenic granites from the northeastern Arabian Shield, Kingdom of Saudi Arabia. United States Geological Survey, Open File Report 85-126.
Harris, N. B. W. (1985). Alkaline complexes from the Arabian Shield. Journal of African Earth Sciences (1983), 3(1-2), 83-88.
Aleinikoff, J. N., & Stoeser, D. B. (1988). Zircon morphology and U-Pb geochronology of seven metaluminous and peralkaline post-orogenic granite complexes of the Arabian Shield, Kingdom of Saudi Arabia (No. 88-604). US Geological Survey.
Qadhi, Talal M (2007) Geochemical Evolution of Rare Metal-Bearing A-Type Granites from the Aja Batholith, Hail Terrain, Saudi Arabia. Journal of the Geological Society of India, 70 (5). 714-729 doi:10.17491/jgsi/2007/700504
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Bustamite
Formula: CaMn2+(Si2O6)
ⓘ 'Calcium Amphibole Subgroup'
Formula: AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ⓘ 'Calcium Amphibole Subgroup var. Hornblende'
Formula: AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ⓘ 'Feldspar Group'
ⓘ 'Feldspar Group var. Perthite'
ⓘ Fluorite
Formula: CaF2
References:
du Bray, E.A. & Stoeser, D.B. 1985. Reconnaisance Geology of the Al Hufayr Quadrangle, Sheet 27/41A, Kingdom of Saudi Arabia. United States Geological Survey, Open-File Report 85-14.
Stuckless, J. S., Hedge, C. E., Wenner, D. B., & Nkomo, I. T. (1985). Isotopic studies of postorogenic granites from the northeastern Arabian Shield, Kingdom of Saudi Arabia. United States Geological Survey, Open File Report 85-126.
Harris, N. B. W. (1985). Alkaline complexes from the Arabian Shield. Journal of African Earth Sciences (1983), 3(1-2), 83-88.
Aleinikoff, J. N., & Stoeser, D. B. (1988). Zircon morphology and U-Pb geochronology of seven metaluminous and peralkaline post-orogenic granite complexes of the Arabian Shield, Kingdom of Saudi Arabia (No. 88-604). US Geological Survey.
Qadhi, Talal M (2007) Geochemical Evolution of Rare Metal-Bearing A-Type Granites from the Aja Batholith, Hail Terrain, Saudi Arabia. Journal of the Geological Society of India, 70 (5). 714-729 doi:10.17491/jgsi/2007/700504
ⓘ Hematite
Formula: Fe2O3
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ 'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
ⓘ Pyrochroite
Formula: Mn(OH)2
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Pyroxmangite
Formula: Mn2+SiO3
ⓘ Quartz
Formula: SiO2
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Thalénite-(Y)
Formula: Y3Si3O10F
ⓘ Thorite
Formula: Th(SiO4)
ⓘ Thortveitite
Formula: Sc2Si2O7
ⓘ Titanite
Formula: CaTi(SiO4)O
ⓘ Zircon
Formula: Zr(SiO4)
References:
du Bray, E.A. & Stoeser, D.B. 1985. Reconnaisance Geology of the Al Hufayr Quadrangle, Sheet 27/41A, Kingdom of Saudi Arabia. United States Geological Survey, Open-File Report 85-14.
Stuckless, J. S., Hedge, C. E., Wenner, D. B., & Nkomo, I. T. (1985). Isotopic studies of postorogenic granites from the northeastern Arabian Shield, Kingdom of Saudi Arabia. United States Geological Survey, Open File Report 85-126.
Harris, N. B. W. (1985). Alkaline complexes from the Arabian Shield. Journal of African Earth Sciences (1983), 3(1-2), 83-88.
Aleinikoff, J. N., & Stoeser, D. B. (1988). Zircon morphology and U-Pb geochronology of seven metaluminous and peralkaline post-orogenic granite complexes of the Arabian Shield, Kingdom of Saudi Arabia (No. 88-604). US Geological Survey.
Qadhi, Talal M (2007) Geochemical Evolution of Rare Metal-Bearing A-Type Granites from the Aja Batholith, Hail Terrain, Saudi Arabia. Journal of the Geological Society of India, 70 (5). 714-729 doi:10.17491/jgsi/2007/700504

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘ'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘPyrochroite4.FE.05Mn(OH)2
Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘThorite9.AD.30Th(SiO4)
ⓘZircon9.AD.30Zr(SiO4)
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘThortveitite9.BC.05Sc2Si2O7
ⓘThalénite-(Y)9.BJ.20Y3Si3O10F
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘBustamite9.DG.05CaMn2+(Si2O6)
ⓘAenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
ⓘPyroxmangite9.DO.05Mn2+SiO3
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Feldspar Group'-
ⓘ'Calcium Amphibole Subgroup
var. Hornblende'		-AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ⓘ'Feldspar Group
var. Perthite'		-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Calcium Amphibole Subgroup'-AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2

List of minerals for each chemical element

HHydrogen
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Hⓘ PyrochroiteMn(OH)2
Hⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ BustamiteCaMn2+(Si2O6)
Oⓘ HematiteFe2O3
Oⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Oⓘ PyrochroiteMn(OH)2
Oⓘ PyroxmangiteMn2+SiO3
Oⓘ QuartzSiO2
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ Thalénite-(Y)Y3Si3O10F
Oⓘ ThoriteTh(SiO4)
Oⓘ ThortveititeSc2Si2O7
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ ZirconZr(SiO4)
Oⓘ Pyroxene GroupADSi2O6
Oⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ FluoriteCaF2
Fⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Fⓘ Thalénite-(Y)Y3Si3O10F
Fⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ BustamiteCaMn2+(Si2O6)
Siⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ PyroxmangiteMn2+SiO3
Siⓘ QuartzSiO2
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ Thalénite-(Y)Y3Si3O10F
Siⓘ ThoriteTh(SiO4)
Siⓘ ThortveititeSc2Si2O7
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ ZirconZr(SiO4)
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ClChlorine
Clⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Clⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ BustamiteCaMn2+(Si2O6)
Caⓘ FluoriteCaF2
Caⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Calcium Amphibole SubgroupAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ScScandium
Scⓘ ThortveititeSc2Si2O7
TiTitanium
Tiⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ TitaniteCaTi(SiO4)O
MnManganese
Mnⓘ BustamiteCaMn2+(Si2O6)
Mnⓘ PyrochroiteMn(OH)2
Mnⓘ PyroxmangiteMn2+SiO3
Mnⓘ SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ HematiteFe2O3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
YYttrium
Yⓘ Thalénite-(Y)Y3Si3O10F
ZrZirconium
Zrⓘ ZirconZr(SiO4)
NbNiobium
Nbⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
ThThorium
Thⓘ ThoriteTh(SiO4)

Geochronology

Mineralization age: Neoproterozoic : 566 ± 4 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Precambrian
 Proterozoic
  Neoproterozoic
   Ediacaran
ⓘ Zircon566 ± 4 Ma

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Jabal_Aja_Protected_Area
Wikidata ID:Q22948566

Other Regions, Features and Areas containing this locality

Arabian PeninsulaPeninsula
Arabian PlateTectonic Plate
AsiaContinent
Eurasian Plate

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

du Bray, E.A. & Stoeser, D.B. 1985. Reconnaisance Geology of the Al Hufayr Quadrangle, Sheet 27/41A, Kingdom of Saudi Arabia. United States Geological Survey, Open-File Report 85-14.
Harris, N. B. W. (1985). Alkaline complexes from the Arabian Shield. Journal of African Earth Sciences (1983), 3(1-2), 83-88.
Stuckless, J. S., Hedge, C. E., Wenner, D. B., & Nkomo, I. T. (1985). Isotopic studies of postorogenic granites from the northeastern Arabian Shield, Kingdom of Saudi Arabia. United States Geological Survey, Open File Report 85-126.
Aleinikoff, J. N., & Stoeser, D. B. (1988). Zircon morphology and U-Pb geochronology of seven metaluminous and peralkaline post-orogenic granite complexes of the Arabian Shield, Kingdom of Saudi Arabia (No. 88-604). US Geological Survey.
Qadhi, Talal M (2007) Geochemical Evolution of Rare Metal-Bearing A-Type Granites from the Aja Batholith, Hail Terrain, Saudi Arabia. Journal of the Geological Society of India, 70 (5). 714-729 doi:10.17491/jgsi/2007/700504
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4pp.193-194
Gahlan, Hisham A., Asimow, Paul D., Azer, Mokhles K., Ma, Chi, Al-Kahtany, Khaled M., Hakeem, Alaa Y. (2021) Geochemistry and mineralogy of the Jebel Aja Igneous Intrusion and the associated exotic pegmatites, Arabian Shield, Saudi Arabia. Lithos, 400. 106395pp. doi:10.1016/j.lithos.2021.106395
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