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Manganese Mines, Hout Bay, Cape Town, Western Cape, South Africai
Regional Level Types
Manganese MinesGroup of Mines
Hout BayBay
Cape TownTown
Western CapeProvince
South AfricaCountry

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A view of the entrance of one of the lower adits.

Manganese Mines, Hout Bay, Cape Town, Western Cape, South Africa
A view of the entrance of one of the lower adits.

Manganese Mines, Hout Bay, Cape Town, Western Cape, South Africa
Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 33° South , 18° East (est.)
Margin of Error:~53km
Locality type:Group of Mines
Köppen climate type:Csa : Hot-summer Mediterranean climate


While exploitable manganese was known to have existed in the Cape from 1676, it was only in 1909 that the difficulties surrounding mining there had been overcome by a small company and ore was being shipped to Belgium. Another company called Hout Bay Manganese Ltd. took over the operations in 1910 and mined the deposit from May 1910 to May 1911. The mine is located on the slopes of the mountain just above Chapman’s Peak Drive and a long ore chute extending 700meters from the mine to the beach down below was constructed. The ore would slide down the chute from the mine to a collection point where it would be transferred to cocopans that took it to the jetty where it was loaded onto ships (Borchers). The pillars of the ore jetty are still visible just off shore at the start of Chapman’s Peak. The amount of ore that was exploited is not certain, but records show that in 1911, roughly 130 tons was produced, fetching a price of £179 (Westby-Nunn, 2005). The extent of the operations is evident when looking at all the ore piles on the side of the mountain (mostly weathered psilomelane and minor pyrolusite . Recent maps show that thirteen shafts are still visible, but most of them are filled in or very shallow. The only one that is still quite extensive and accessible leads about 70 meters horizontally into the mountain.

Located on the Constantia berg above Chapman's Peak Drive.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

Dufrénite
Formula: Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Reference: Minerals of South Africa
Planerite
Formula: Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Description: As far as we are aware it's the first time Planerite has been positively identified from South Africa from this specimen http://www.mindat.org/gallery.php?loc=56228&min=3234.
Reference: ID by Raman spectra (B. Cairncross personal communication, Sept 2012)
'Psilomelane'
Reference: Minerals of South Africa
Pyrolusite
Formula: Mn4+O2
Reference: Minerals of South Africa
Romanèchite
Formula: (Ba,H2O)2(Mn4+,Mn3+)5O10
Reference: Minerals of South Africa
Todorokite
Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Reference: Cairncross, B., and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, Linden 2014, RSA, pg 249

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Pyrolusite'4.DB.05Mn4+O2
'Romanèchite'4.DK.10(Ba,H2O)2(Mn4+,Mn3+)5O10
'Todorokite'4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 8 - Phosphates, Arsenates and Vanadates
'Dufrénite'8.DK.15Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
'Planerite'8.DD.15Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Unclassified Minerals, Rocks, etc.
'Psilomelane'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 7 - MULTIPLE OXIDES
AB3X7
Todorokite7.8.1.1(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AB8X16
Romanèchite7.9.2.1(Ba,H2O)2(Mn4+,Mn3+)5O10
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)7(XO4)4Zq·xH2O
Dufrénite42.9.1.2Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Planerite42.9.3.6Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Unclassified Minerals, Rocks, etc.
'Psilomelane'-

List of minerals for each chemical element

HHydrogen
H DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
H PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
H Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
H Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
OOxygen
O DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
O PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
O PyrolusiteMn4+O2
O Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
O Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
NaSodium
Na Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MgMagnesium
Mg Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AlAluminium
Al PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
Al Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
PPhosphorus
P DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
P PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
KPotassium
K Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
CaCalcium
Ca DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
Ca Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MnManganese
Mn PyrolusiteMn4+O2
Mn Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
Mn Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
FeIron
Fe DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
SrStrontium
Sr Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
BaBarium
Ba Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
Ba Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Borchers, R.B. Mining Activity in Hout Bay. Hout Bay Museum.
Westby- Nunn, T., (2005) Hout Bay, An Illustrated Historical Profile.


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