Isocubanite
A valid IMA mineral species
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About Isocubanite
Formula:
CuFe2S3
Colour:
Bronze yellow brown
Lustre:
Metallic, Sub-Metallic
Hardness:
3½
Specific Gravity:
4.075 (Calculated)
Crystal System:
Isometric
Name:
Named as the isometric polymorph of cubanite.
Dimorph of:
Structurally related to the Sphalerite Group.
Characteristic of high-temperature (> 200°C) present-day submarine sulphide deposits. Unstable and therefore unusual in fossil ores.
Can be formed from cubanite by heating the latter to between 200°C and 270°C; this transformation is irreversible. Also known as an artificial phase and as 'iss - intermediate solid solution of CuFe2S3 composition', 'cubic cubanite', 'cubanite II' and 'chalcopyrrhotite'.
May also transform to UM1994-22-S:CuFe (Cu1-xFe3+xS4) and chalcopyrite (Wintenberger et al., 1994).
Characteristic of high-temperature (> 200°C) present-day submarine sulphide deposits. Unstable and therefore unusual in fossil ores.
Can be formed from cubanite by heating the latter to between 200°C and 270°C; this transformation is irreversible. Also known as an artificial phase and as 'iss - intermediate solid solution of CuFe2S3 composition', 'cubic cubanite', 'cubanite II' and 'chalcopyrrhotite'.
May also transform to UM1994-22-S:CuFe (Cu1-xFe3+xS4) and chalcopyrite (Wintenberger et al., 1994).
Unique Identifiers
Mindat ID:
2052
Long-form identifier:
mindat:1:1:2052:3
GUID
(UUID V4):
(UUID V4):
e3e2f0ae-d75d-464e-8599-a77e87d1d758
IMA Classification of Isocubanite
Approved
Approval year:
1988
Classification of Isocubanite
2.CB.55b
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.9.13.3
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
3.1.28
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Icb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Iso | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Isocubanite
Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Bronze yellow brown
Hardness:
3½ on Mohs scale
Hardness:
VHN100=175 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.075 g/cm3 (Calculated)
Optical Data of Isocubanite
Reflectivity:
Wavelength | R |
---|---|
400nm | 20.9% |
420nm | 22.7% |
440nm | 24.6% |
460nm | 26.9% |
480nm | 29.2% |
500nm | 31.4% |
520nm | 33.2% |
540nm | 34.8% |
560nm | 36.2% |
580nm | 37.4% |
600nm | 38.2% |
620nm | 39.1% |
640nm | 39.7% |
660nm | 40.3% |
680nm | 40.9% |
700nm | 41.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 41.3%.
Colour in reflected light:
pinkish brown
Pleochroism:
Non-pleochroic
Chemistry of Isocubanite
Mindat Formula:
CuFe2S3
Elements listed:
Common Impurities:
Zn
Crystallography of Isocubanite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Cell Parameters:
a = 5.303(3) Å
Unit Cell V:
149.13 ų (Calculated from Unit Cell)
Morphology:
Fine-grained aggregates to minutely cubo-octahedral.
Comment:
Z uncertain = 3 or 4. Sawada et al. (1962) give a = 5.295 Å; Fleet (1970) gives a = 5.2949(3) Å.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0010766 | Isocubanite | Szymanski J T (1974) The crystal structure of high-temperature CuFe2S3 Zeitschrift fur Kristallographie 140 240-248 | 1974 | Strathcona mine, Sudbury, Ontario | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.05 Å | (100) |
2.64 Å | (30) |
1.87 Å | (80) |
1.59 Å | (70) |
1.32 Å | (40) |
1.21 Å | (50) |
1.08 Å | (60) |
1.02 Å | (50) |
Comments:
The powder diffraction pattern is very similar to that of sphalerite (Fleet, 1970).
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
6 : Secondary asteroid phases | 4.566-4.560 |
Stage 3a: Earth’s earliest Hadean crust | >4.50 |
9 : Lava/xenolith minerals (hornfels, sanidinite facies) | |
Stage 3b: Earth’s earliest hydrosphere | >4.45 |
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) | |
15 : Black/white smoker minerals and other seafloor hydrothermal minerals | |
Near-surface Processes | |
28 : Photo-alteration, pre-biotic | |
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Isocubanite
General Appearance of Type Material:
Euhedral grains
Place of Conservation of Type Material:
National School of Mines, Paris, France
Geological Setting of Type Material:
In oceanic black smokers
Associated Minerals at Type Locality:
Reference:
Caye, R., Cervelle, B., Cesbron, F., Oudin, E., Picot, P., Pillard, F. (1988): Isocubanite, a new definition of the cubic polymorph of cubanite CuFe2S3. Mineralogical Magazine 52, 509-514.
Synonyms of Isocubanite
Other Language Names for Isocubanite
Relationship of Isocubanite to other Species
Structurally related to group(s):
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
2.CB. | Agmantinite | Ag2MnSnS4 |
2.CB. | Richardsite | Zn2CuGaS4 |
2.CB. | Gachingite | Au(Te1-xSex) |
2.CB. | Tolstykhite | Au3S4Te6 |
2.CB. | Hanswilkeite | KFeS2 |
2.CB. | Auroselenide | AuSe |
2.CB. | Ruizhongite | (Ag2◻)Pb3Ge2S8 |
2.CB. | Okruginite | Cu2SnSe3 |
2.CB.05a | Coloradoite | HgTe |
2.CB.05a | Hawleyite | CdS |
2.CB.05a | Metacinnabar | HgS |
2.CB.05c | Polhemusite | (Zn,Hg)S |
2.CB.05b | Sakuraiite | (Cu,Zn,Fe)3(In,Sn)S4 |
2.CB.05a | Sphalerite | ZnS |
2.CB.05a | Stilleite | ZnSe |
2.CB.05a | Tiemannite | HgSe |
2.CB.05 | UM1998-15-S:CuFeZn | Cu2Fe3Zn5S10 |
2.CB.05a | Rudashevskyite | (Fe,Zn)S |
2.CB.05a | Ishiharaite | (Cu,Ga,Fe,In,Zn)S |
2.CB.07a | Shenzhuangite | NiFeS2 |
2.CB.07a | Unnamed (Cu-Mn-Sn Sulpide) | Cu2MnSnS4 |
2.CB.10a | Chalcopyrite | CuFeS2 |
2.CB.10a | Eskebornite | CuFeSe2 |
2.CB.10a | Gallite | CuGaS2 |
2.CB.10b | Haycockite | Cu4Fe5S8 |
2.CB.10a | Lenaite | AgFeS2 |
2.CB.10b | Mooihoekite | Cu9Fe9S16 |
2.CB.10b | Putoranite | Cu1.1Fe1.2S2 |
2.CB.10a | Roquesite | CuInS2 |
2.CB.10b | Talnakhite | Cu9(Fe,Ni)8S16 |
2.CB.10a | Laforêtite | AgInS2 |
2.CB.10a | Unnamed (Cu-Zn-In Sulphide) | CuZn2InS4 |
2.CB.10a | UM1984-30-S:CuFeSn | Cu2Fe2Sn3S7 |
2.CB.10c | Omariniite | Cu8Fe2ZnGe2S12 |
2.CB.15a | Černýite | Cu2(Cd,Zn,Fe)SnS4 |
2.CB.15a | Ferrokësterite | Cu2FeSnS4 |
2.CB.15a | Hocartite | Ag2(Fe2+,Zn)SnS4 |
2.CB.15a | Idaite | Cu5FeS6 |
2.CB.15a | Kësterite | Cu2ZnSnS4 |
2.CB.15a | Kuramite | Cu3SnS4 |
2.CB.15b | Mohite | Cu2SnS3 |
2.CB.15a | Pirquitasite | Ag2ZnSnS4 |
2.CB.15a | Stannite | Cu2FeSnS4 |
2.CB.15c | Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 |
2.CB.15a | Velikite | Cu2HgSnS4 |
2.CB.15c | UM2006-11-S:CuFeGeZn | Cu8(Fe,Zn)3Ge2S12 (?) |
2.CB.17a v | Arsenic-bearing Renierite | Cu11GeAsFe4S16 |
2.CB.20 | Chatkalite | Cu6FeSn2S8 |
2.CB.20 | Mawsonite | Cu6Fe2SnS8 |
2.CB.30 | Argyropyrite | near Ag2Fe7S11 |
2.CB.30 | Colusite | Cu13VAs3S16 |
2.CB.30 | Germanite | Cu13Fe2Ge2S16 |
2.CB.30 | Germanocolusite | Cu26V2(Ge,As)6S32 |
2.CB.30 | Nekrasovite | Cu26V2(Sn,As,Sb)6S32 |
2.CB.30 | Stibiocolusite | Cu13V(Sb,Sn,As)3S16 |
2.CB.30 | Ovamboite | Cu20(Fe,Cu,Zn)6W2Ge6S32 |
2.CB.30 | Maikainite | Cu20(Fe,Cu)6Mo2Ge6S32 |
2.CB.30 | Frieseite | Ag2Fe5S8 (?) |
2.CB.35a | Hemusite | Cu6SnMoS8 |
2.CB.35a | Kiddcreekite | Cu6SnWS8 |
2.CB.35a | Polkovicite | (Fe,Pb)3(Ge,Fe)1-xS4 |
2.CB.35a | Renierite | (Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 |
2.CB.35a | Vinciennite | Cu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16 |
2.CB.35a | Morozeviczite | (Pb,Fe)3Ge1-xS4 |
2.CB.35b | Catamarcaite | Cu6GeWS8 |
2.CB.40 | Lautite | CuAsS |
2.CB.42 | Lingbaoite | AgTe3 |
2.CB.45 | Cadmoselite | CdSe |
2.CB.45 | Greenockite | CdS |
2.CB.45 | Wurtzite | (Zn,Fe)S |
2.CB.45 | Rambergite | MnS |
2.CB.45 | Buseckite | (Fe,Zn,Mn)S |
2.CB.45 | Maletoyvayamite | Au3Se4Te6 |
2.CB.47 | Murchisite | Cr5S6 |
2.CB.50 | Zincselenide | ZnSe |
2.CB.50 | Wassonite | TiS |
2.CB.52 | Dzhezkazganite | ReMoCu2PbS6 ? |
2.CB.55a | Cubanite | CuFe2S3 |
2.CB.60 | Picotpaulite | TlFe2S3 |
2.CB.60 | Raguinite | TlFeS2 |
2.CB.65 | Argentopyrite | AgFe2S3 |
2.CB.65 | Sternbergite | AgFe2S3 |
2.CB.70 | Sulvanite | Cu3VS4 |
2.CB.75 | Vulcanite | CuTe |
2.CB.80 | Empressite | AgTe |
2.CB.85 | Muthmannite | AuAgTe2 |
Fluorescence of Isocubanite
Not fluorescent
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Isocubanite
mindat.org URL:
https://www.mindat.org/min-2052.html
Please feel free to link to this page.
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Mineral Dealers:
References for Isocubanite
Reference List:
Fleet, M. E. (1970) Refinement of the crystal structure of cubanite and polymorphism of CuFe2S3. Zeitschrift für Kristallographie - Crystalline Materials, 132 (1) 276-287 doi:10.1524/zkri.1970.132.1-6.276
Cabri, Louis J. (1973) New data on Phase Relations in the Cu-Fe-S System. Economic Geology, 68 (4) 443-454 doi:10.2113/gsecongeo.68.4.443
Dutrizac, J. E. (1976) Reactions in cubanite and chalcopyrite. The Canadian Mineralogist, 14 (2) 172-181
René, Caye, Cervelle, Bernard, Cesbron, Fabien, Oudin, Elisabeth, Picot, Paul, Pillard, François (1988) Isocubanite, a New Definition of the Cubic Polymorph of Cubanite CuFe2S3. Mineralogical Magazine, 52 (367) 509-514 doi:10.1180/minmag.1988.052.367.10
Chandra, U., Parthasarathy, G., Sharma, P. (2010) Synthetic cubanite CuFe2S3: pressure-induced transformation to isocubanite. The Canadian Mineralogist, 48 (5) 1137-1147 doi:10.3749/canmin.48.5.1137
Localities for Isocubanite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Afghanistan | |
| Ramdohr (1972) |
Algeria | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Angola | |
| Ramdohr (1972) |
Antarctica | |
| Ramdohr (1967) |
Arctic Ocean | |
| Sahlström et al. (2022) |
Snook +4 other references | |
Argentina | |
| Ramdohr (1972) |
Atlantic Ocean | |
| Ondréas et al. (2012) |
Firstova et al. (2016) | |
Ayupova et al. (2018) | |
Melekestseva +1 other reference | |
Mozgova et al. (2007) | |
Canadian Mineralogist: 34: 23-28. | |
Gablina et al. (2017) | |
Gablina et al. (2018) +1 other reference | |
Gablina et al. (2018) | |
| Bortnikov et al. (2001) +1 other reference |
Melekestseva et al. (2014) | |
Safina et al. (2016) | |
Firstova et al. (2019) | |
Firstova et al. (2022) | |
Y. Moëlo : "Compte-rendu de la ... +3 other references | |
Fouquet Y et al. (1993) | |
Gablina et al. (2017) | |
| Fan et al. (2022) |
Wang et al. (2017) +1 other reference | |
Wang et al. (2021) | |
Pašava et al. (2007) | |
Haase et al. (2007) | |
Australia | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Austria | |
| Kurat et al. (1965) |
| Heider et al. (2019) |
| Kaunertal et al. (in German) +1 other reference |
Bangladesh | |
| Ramdohr (1972) |
Belgium | |
| Ramdohr (1972) |
Brazil | |
| Ramdohr (1972) |
| London +2 other references |
| Gomes et al. (1980) |
Burkina Faso | |
| Ramdohr (1972) |
Cambodia | |
| Ramdohr (1972) |
Canada | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Chile | |
| Ramdohr (1972) |
Costa Rica | |
| Ramdohr (1972) |
Czech Republic | |
| Ramdohr (1972) |
Denmark | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Finland | |
| Ramdohr (1972) |
| Ramdohr (1972) |
France | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Germany | |
| Weiß (1990) |
| Weiß (1990) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Sharygin (2012) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) +1 other reference |
India | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Indian Ocean | |
| Choi et al. (2023) |
Wang et al. (2018) | |
| Zhang et al. (2018) +1 other reference |
Wang et al. (2018) +2 other references | |
Indonesia | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Italy | |
| ADORNI F. (1997) |
ADORNI F. (1997) | |
Adorni F. (1997) | |
| Sessa et al. (2017) |
| Ramdohr (1972) +1 other reference |
Japan | |
| Kitakaze (2010) |
| Ramdohr (1972) |
| Kitakaze et al. (2010) |
| HATSUKAWA et al. (2020) |
| 北風嵐 (2005) |
北風嵐 (2005) | |
Latvia | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Mali | |
| El Goresy (1965) +2 other references |
New Zealand | |
| Mason et al. (Zn) |
Nigeria | |
| Ramdohr (1972) +1 other reference |
Norway | |
| Laurent (2016) |
| Ramdohr (1972) |
Pacific Ocean | |
| Hannington et al. (1986) |
| Papanicolaou (2020) |
René et al. (1988) | |
Hannington et al. (1986) | |
AMES et al. (1993) | |
| Petrology from Bent Hill (Lawrie, D. & Miller, D. Jay) |
| Eos Trans. AGU (48) +1 other reference |
Poland | |
| Ramdohr (1972) |
Red Sea | |
Missack et al. (1989) | |
Romania | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Szakáll (2002) |
Russia | |
| Maslennikov et al. (2005) +1 other reference |
| Ramdohr (1972) |
| Barkov et al. (2021) |
| Shvedov et al. (2015) |
| Simonov et al. (2006) |
| Ramdohr (1972) |
Serbia | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Somalia | |
| Ramdohr (1972) |
South Africa | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Ramdohr (1972) | |
| Ramdohr (1972) |
South Sudan | |
| Ramdohr (1972) |
Spain | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Sweden | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Turkey | |
| Akbulut et al. (2010) |
Uganda | |
| Ramdohr (1972) |
UK | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Ukraine | |
| Ramdohr (1972) |
Ramdohr (1972) | |
| Ramdohr (1972) |
| Ramdohr (1972) |
USA | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Buchwald (1975) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| London: New York. 245 pp. +1 other reference |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Ramdohr (1972) | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Ramdohr (1972) | |
| Ramdohr (1972) |
| American Mineralogist: 76: 1363-1372. |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1967) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
London +1 other reference | |
| Ramdohr (1972) |
Ramdohr (1972) | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Craig et al. (1971) |
Ramdohr (1972) | |
| Ramdohr (1972) |
| Ramdohr (1972) |
Ramdohr (1972) | |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
| Ramdohr (1972) |
Zambia | |
| Ramdohr (1972) |
Zimbabwe | |
| Ramdohr (1972) |
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MESO Mineral zone, Central Indian Ridge, Indian Ocean