Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Lega Dembi Mine, Megado, Oromia Region (Oromiya Region), Ethiopia


mindat Locality ID: 21854
mindat URL: http://www.mindat.org/loc-21854.html

Tectonic Settings:

Total number of sublocalities beneath "Lega Dembi Mine, Megado, Oromia Region (Oromiya Region), Ethiopia": 0
Total number of bottom-level sublocalities: 0

Latitude: 5°27'29"N
Longitude: 38°53'20"E
Decimal Degree (lat, lon): 5.4580555555556,38.888888888889
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Ag Al As Au Bi C Ca Cu Fe H K Mg Mo Ni O Pb S Sb Se Si Te Zn 

Elements from minerals reported directly at this locality: Ag Al As Au Bi C Ca Cu Fe H K Mg Mo Ni O Pb S Sb Se Si Te Zn 

Structural Groups for minerals in this locality: 
AmphiboleArsenopyriteBournoniteCalciteChalcopyriteClayClinozoisiteCopperEpidoteMica
MolybdeniteNickelineNoneNot in a structural groupPentlanditePyriteQuartzRocksaltSphaleriteSpinel
TetradymiteTetrahedrite

27 IMA Minerals at location:
Actinolite  (*)Argentopentlandite  (*)Arsenopyrite  (*)Bournonite  (*)Calcite  (*)
Chalcopyrite  (*)Epidote  (*)Galena  (*)Gold  (*)Graphite  (*)
Hessite  (*)Kyanite  (*)Laitakarite  (*)Molybdenite  (*)Muscovite  (*)
Nickeline  (*)Gersdorffite-Pa3  (*)Pentlandite  (*)Petzite  (*)Pyrite  (*)
Pyrrhotite  (*)Quartz  (*)Sphalerite  (*)Stützite  (*)Tetrahedrite-(Zn)  (*)
Tremolite  (*)Violarite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)203419
Argentopentlandite  (*)PentlanditeAg(Fe,Ni)8S8067
Arsenopyrite  (*)ArsenopyriteFeAsS09052
Bournonite  (*)BournoniteCuPbSbS301089
Calcite  (*)CalciteCa(CO3)027770
Chalcopyrite  (*)ChalcopyriteCuFeS2027198
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)08173
Galena  (*)RocksaltPbS024243
Gold  (*)CopperAu030554
Graphite  (*)NoneC02812
Hessite  (*)NoneAg2Te0804
Kyanite  (*)Not in a structural groupAl2OSiO401507
Laitakarite  (*)TetradymiteBi4(Se,S)3030
Molybdenite  (*)MolybdeniteMoS205800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2017380
Nickeline  (*)NickelineNiAs0633
Gersdorffite-Pa3  (*)PyriteNiAsS0767
Pentlandite  (*)Pentlandite(Ni,Fe)9S801512
Petzite  (*)NoneAg3AuTe20409
Pyrite  (*)PyriteFeS2039462
Pyrrhotite  (*)NickelineFe7S809056
Quartz  (*)QuartzSiO2061156
Sphalerite  (*)SphaleriteZnS021482
Stützite  (*)NoneAg5-xTe3 (x = 0.24-0.36)092
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1305317
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)202562
Violarite  (*)SpinelFeNi2S40380


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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