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Gwayi River Mine, Dete (Dett), Hwange District, Matabeleland North, Zimbabwei
Regional Level Types
Gwayi River MineMine
Dete (Dett)- not defined -
Hwange DistrictDistrict
Matabeleland NorthProvince
ZimbabweCountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
18° 27' 23'' South , 27° 6' 8'' East
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Kamativi Mine1,575 (2012)16.3km
Dete2,993 (2013)30.6km
Mindat Locality ID:
271917
Long-form identifier:
mindat:1:2:271917:0
GUID (UUID V4):
5139023c-ab1c-4ded-98c3-3355391f6a58
Other/historical names associated with this locality:
Gwaai River Mine


The Gwayi River Mine (formerly Gwaai River Mine) was operated by Messina (Transvaal) Development Corporation from 1970 until 1975, when the mine was closed for economic reasons.

The mine property which occupies an area of about 7km² immediately south of the confluence of the Gwaii and Siamakuli rivers, lies some 14km north of the main Victoria Falls road. There is a narrow tarmac connecting link.

The mineralized host rocks (metapsammites with stratabound chalcopyrite and pyrite mineralization, oxidized to malachite and azurite) are surrounded by amphibolites and calc-silicate-bearing marbles. The mineralized horizons are interpreted as interflow sedimentary rocks intercalated with mafic metavolcanic rocks (now represented by amphibolites).

There are three ore shoots (Adder, Puff Adder, and Gaboon Viper) in the form of flattened elongated cigar-shaped pods which are restricted to the noses of fold closures, and which plunge parallel to co-linear F1 and F3 deformation structures. There are two types of copper occurrences: in shears and fractures within tremolite and cummingtonite-anthophyllite amphibolites which are enclosed in hornblende amphibolites; and in siliceous and calc-silicate-rich interflow metasedimentary intercalations in the mafic sequence. The sulfides consist of chalcopyrite, pyrite, and pyrrhotite. At the Adder shoot at Gwayi River Mine, coarse sulfides occur together with vein quartz filling breccias in calc-silicate rocks in the nose of a fold. At the Puff Adder shaft, finely disseminated sulfide mineralization is localized within bands of vitreous grey quartzite grading outwards into cross-cutting veins and blows of quartz.

The orebody varies from 3 to 15m in width and has a strike length of 400m, and a down-dip extent of at least 470m. The ores appear to have been metamorphosed at high grades and then retrograded. Ore minerals are intergrown with metamorphic minerals like almandine garnet, cordierite, tremolite, cummingtonite, anthophyllite, and epidote. The ores predate regional granitic events, as they are cut by undeformed granitic intrusions. Bahnemann and Lockett (1979) attributed the origin of the Gwayi River Mine mineralization to “syngenetic volcanic exhalations next to fumarolic vents” or to a “final degassing of the lava pile”. These volcanogenic deposits were then metamorphosed, stretched and deformed into the shape seen today.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Anthophyllite
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
Azurite
Formula: Cu3(CO3)2(OH)2
Bornite
Formula: Cu5FeS4
Chalcopyrite
Formula: CuFeS2
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Cummingtonite
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Malachite
Formula: Cu2(CO3)(OH)2
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe1-xS
Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcopyrite2.CB.10aCuFeS2
Pyrrhotite2.CC.10Fe1-xS
Pyrite2.EB.05aFeS2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Anthophyllite9.DD.05◻{Mg2}{Mg5}(Si8O22)(OH)2
Cummingtonite9.DE.05◻{Mg2}{Mg5}(Si8O22)(OH)2
Tremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2

List of minerals for each chemical element

HHydrogen
H Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
H AzuriteCu3(CO3)2(OH)2
H Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
H Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
H MalachiteCu2(CO3)(OH)2
H Tremolite◻Ca2Mg5(Si8O22)(OH)2
CCarbon
C AzuriteCu3(CO3)2(OH)2
C MalachiteCu2(CO3)(OH)2
OOxygen
O Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
O AzuriteCu3(CO3)2(OH)2
O AlmandineFe32+Al2(SiO4)3
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
O Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
O MalachiteCu2(CO3)(OH)2
O Tremolite◻Ca2Mg5(Si8O22)(OH)2
MgMagnesium
Mg Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
Mg Tremolite◻Ca2Mg5(Si8O22)(OH)2
AlAluminium
Al AlmandineFe32+Al2(SiO4)3
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
SiSilicon
Si Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Si AlmandineFe32+Al2(SiO4)3
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
Si Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Si Tremolite◻Ca2Mg5(Si8O22)(OH)2
SSulfur
S BorniteCu5FeS4
S ChalcopyriteCuFeS2
S PyriteFeS2
S PyrrhotiteFe1-xS
CaCalcium
Ca Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Ca Tremolite◻Ca2Mg5(Si8O22)(OH)2
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Fe PyriteFeS2
Fe PyrrhotiteFe1-xS
CuCopper
Cu AzuriteCu3(CO3)2(OH)2
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2

Other Regions, Features and Areas containing this locality

African PlateTectonic 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

 
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