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Al-Wask ophiolite complex, Medina Region, Saudi Arabiai
Regional Level Types
Al-Wask ophiolite complexOphiolite Complex
Medina RegionRegion
Saudi ArabiaCountry

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Latitude & Longitude (WGS84):
25° 7' North , 37° 52' East
Latitude & Longitude (decimal):
25.11667,37.86667
GRN:
N17E25
Type:
Ophiolite Complex
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
482454
Long-form identifier:
mindat:1:2:482454:4
GUID (UUID V4):
0


Extending about 80 km from northeast to southwest, parallel to the general structural fabric of the Yanbu Suture. The ophiolite forms a series of folded thrust sheets intercalated with a group of Late Neoproterozoic arc-related volcanic and sedimentary successions and granitoids. The area is unconformably overlain by the Neogene Harrat Lunayyir plateau basalts The Al-Wask ultramafic rocks are highly serpentinized, deformed and mylonitized. Serpentinized harzburgite is the dominant rock type, while serpentinized dunite is less common. Chromitite, though scarce, forms small pods and lenticular layers often enveloped by serpentinized ultramafics, with both massive and disseminated textures. Extensive mylonitization and carbonatization are associated with major tectonic lineaments and faults cutting the ophiolite. Magnesite bodies are commonly hosted by serpentinite, most often at contacts with country rocks and along regional faults. Magnesite forms masses, pockets and snow-white veins, all with sharp but irregular boundaries.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List


14 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Amphibole Supergroup'
Formula: AB2C5(T8O22)W2
ⓘ Antigorite
Formula: Mg3(Si2O5)(OH)4
ⓘ Calcite
Formula: CaCO3
ⓘ 'Calcium Amphibole Subgroup'
Formula: AnCa2(C2+5-mC3+m)(Si8-(n+m)Al(n+m))W2
ⓘ 'Calcium Amphibole Subgroup var. Hornblende'
Formula: AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ⓘ 'Chlorite Group'
ⓘ 'Chrome-Spinel (of Dana)'
ⓘ Chrysotile
Formula: Mg3(Si2O5)(OH)4
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Clinochlore var. Chromium-bearing Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
ⓘ Clinochlore var. Pycnochlorite
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Clinochlore var. Ripidolite
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ 'Ferritchromit'
ⓘ Forsterite
Formula: Mg2(SiO4)
ⓘ Lizardite
Formula: Mg3(Si2O5)(OH)4
ⓘ Magnesite
Formula: MgCO3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ 'Olivine Group'
Formula: M2SiO4
ⓘ 'Orthopyroxene Subgroup'
ⓘ Quartz
Formula: SiO2
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ 'Serpentine Subgroup var. Bastite'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
ⓘ Spinel
Formula: MgAl2O4
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘMagnesite5.AB.05MgCO3
ⓘDolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
ⓘChrysotile9.00.Mg3(Si2O5)(OH)4
ⓘForsterite9.AC.05Mg2(SiO4)
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘvar. Chromium-bearing Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
ⓘvar. Ripidolite9.EC.55(Mg,Fe,Al)6(Si,Al)4O10(OH)8
ⓘvar. Pycnochlorite9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘAntigorite9.ED.15Mg3(Si2O5)(OH)4
ⓘLizardite9.ED.15Mg3(Si2O5)(OH)4
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5(T8O22)W2
ⓘ'Chlorite Group'-
ⓘ'Calcium Amphibole Subgroup
var. Hornblende'		-AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
ⓘ'Serpentine Subgroup
var. Bastite'		-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
ⓘ'Chrome-Spinel (of Dana)'-
ⓘ'Orthopyroxene Subgroup'-
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Olivine Group'-M2SiO4
ⓘ'Calcium Amphibole Subgroup'-AnCa2(C2+5-mC3+m)(Si8-(n+m)Al(n+m))W2
ⓘ'Ferritchromit'-

List of minerals for each chemical element

HHydrogen
Hⓘ AntigoriteMg3(Si2O5)(OH)4
Hⓘ ChrysotileMg3(Si2O5)(OH)4
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Hⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Hⓘ LizarditeMg3(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
Hⓘ Clinochlore var. PycnochloriteMg5Al(AlSi3O10)(OH)8
CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
Cⓘ MagnesiteMgCO3
OOxygen
Oⓘ Amphibole SupergroupAB2C5(T8O22)W2
Oⓘ AntigoriteMg3(Si2O5)(OH)4
Oⓘ CalciteCaCO3
Oⓘ ChrysotileMg3(Si2O5)(OH)4
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ DolomiteCaMg(CO3)2
Oⓘ ForsteriteMg2(SiO4)
Oⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Oⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Oⓘ LizarditeMg3(Si2O5)(OH)4
Oⓘ MagnesiteMgCO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Oⓘ SpinelMgAl2O4
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ Olivine GroupM2SiO4
Oⓘ Clinochlore var. PycnochloriteMg5Al(AlSi3O10)(OH)8
FFluorine
Fⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
MgMagnesium
Mgⓘ AntigoriteMg3(Si2O5)(OH)4
Mgⓘ ChrysotileMg3(Si2O5)(OH)4
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ ForsteriteMg2(SiO4)
Mgⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Mgⓘ LizarditeMg3(Si2O5)(OH)4
Mgⓘ MagnesiteMgCO3
Mgⓘ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Mgⓘ SpinelMgAl2O4
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mgⓘ Clinochlore var. PycnochloriteMg5Al(AlSi3O10)(OH)8
AlAluminium
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Alⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Alⓘ SpinelMgAl2O4
Alⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Alⓘ Calcium Amphibole SubgroupAnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
Alⓘ Clinochlore var. PycnochloriteMg5Al(AlSi3O10)(OH)8
SiSilicon
Siⓘ AntigoriteMg3(Si2O5)(OH)4
Siⓘ ChrysotileMg3(Si2O5)(OH)4
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ ForsteriteMg2(SiO4)
Siⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Siⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Siⓘ LizarditeMg3(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
Siⓘ Olivine GroupM2SiO4
Siⓘ Calcium Amphibole SubgroupAnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
Siⓘ Clinochlore var. PycnochloriteMg5Al(AlSi3O10)(OH)8
ClChlorine
Clⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caⓘ Calcium Amphibole SubgroupAnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
CrChromium
Crⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
MnManganese
Mnⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Feⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Niⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
ZnZinc
Znⓘ Serpentine Subgroup var. BastiteD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

Other Regions, Features and Areas containing this locality

Arabian PeninsulaPeninsula
Arabian PlateTectonic Plate
AsiaContinent

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

[1]Gahlan, Hisham A., Azer, Mokhles K., Asimow, Paul D., Al-Kahtany, Khaled M. (2020) Genesis and geodynamic evolution of serpentinized ultramafics and associated magnesite deposits in the Al-Wask ophiolite, Arabian Shield, Saudi Arabia. American Journal of Science, 320 (3) 236-279 doi:10.2475/03.2020.02
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