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Coedmore quarries (Coedmore quarry), Bellair, Durban, eThekwini District, KwaZulu-Natal, South Africai
Regional Level Types
Coedmore quarries (Coedmore quarry)Group of Quarries
Bellair- not defined -
Durban- not defined -
eThekwini DistrictDistrict
KwaZulu-NatalProvince
South AfricaCountry

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Key
Latitude & Longitude (WGS84):
29° 54' 2'' South , 30° 56' 52'' East
Latitude & Longitude (decimal):
Locality type:
Group of Quarries
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Berea15,000 (2012)7.0km
Durban3,120,282 (2012)9.2km
Mpumalanga140,121 (2013)31.6km
eMkhomazi20,410 (2018)37.0km
Tongaat Beach722 (2017)37.5km


Located in portion "Natcem" of Bellair 823, Bellair, Durban.
Co-ordinates: 29deg. 52'S, 30deg. 52'E.

A narrow, eastward-dipping, Phanerozoic dolerite sill (Stormberg series, Karroo System) has been intruded into sandstone (Natal series, Cape System). Pockets and narrow fissures in the dolerite host crystallised minerals (prehnite, epidote, apophyllite, quartz, calcite). A series of near-vertical NE/SW-trending fissure-breccia zones are developed in the sandstone, and these host carbonate assemblages (calcite, siderite, with minor quartz, barite, goethite, pyrite, and much white clay). Operations began in 1928 and the quarry is still being actively worked.
A second pit on the property works tillite (Dwyka series, Karroo system).

Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

'Apophyllite'
Reference: Heron, H.D.C. (1972). Coedmore Quarries. July newsletter of the Natal Mineral and Gem Society; Heron, H.D.C. (1996a). The occurrence of apophyllite at five KwaZulu-Natal localities. Micro News & Views, 23(1): 3-6; Heron, H.D.C. (2004). Apophyllite-bearing assemblages in brecciated dolerite boulders at Coedmore Quarries, Durban, Natal. Micro News and Views, 30(3): 2-6 and 31(1): 4-9.
Baryte
Formula: BaSO4
Reference: Heron, H.D.C. (1992). The mineralogy of cavities associated with Fissure-3 quartzite breccia on level 5 at Coedmore Quarries,Durban. Unpublished report for the Quarry Management; Heron, H.D.C. (1996). A partially leached barite-bearing assemblage in a boulder derived from Fissure 4 on level 4 at Coedmore Quarries, Durban. Unpublished report for the Quarry Management., Heron, H.D.C. (in prep.) Barite occurrences at Coedmore Quarries, Durban, Natal. Unpublished report for the Quarry Management.
Calcite
Formula: CaCO3
Reference: Heron, H.D.C. (1972). Coedmore Quarries. July newsletter of the Natal Mineral and Gem Society; Heron, H.D.C. (1991). Calcite-siderite assemblages in quartzite boulders from Coedmore Quarries, Durban. Unpublished report for the Quarry Management; Heron, H.D.C. (2003). Scalenohedral calcite occurrences in the dolerite sill at Coedmore Quarries, Durban, Natal.
'Chabazite'
Reference: Tschernich, R. (1992): Zeolites of the World.
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Reference: Heron, H.D.C. (2001). A unique zeolite-bearing prehnite-assemblage sample from the dolerite sill at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
'Chlorite Group'
Reference: Heron, H.D.C. (1996). A partially leached barite-bearing assemblage in a boulder derived from Fissure 4 on level 4 at Coedmore Quarries, Durban. Unpublished report for the Quarry Management. Heron, H.D.C. (in prep.) Barite occurrences at Coedmore Quarries, Durban, Natal. Unpublished report for the Quarry Management.
Copiapite ?
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Description: Possibly ferricopiapite.
Reference: Hugh Heron collection
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Heron, H.D.C. (1972). Coedmore Quarries. July newsletter of the Natal Mineral and Gem Society; Heron, H.D.C. (2004). Apophyllite-bearing assemblages in brecciated dolerite boulders at Coedmore Quarries, Durban, Natal. Micro News and Views, 30(3): 2-6 and 31(1): 4-9; Heron, H.D.C. (2001). A unique zeolite-bearing prehnite-assemblage sample from the dolerite sill at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
Goethite
Formula: α-Fe3+O(OH)
Reference: Heron, H.D.C. (1991). Calcite-siderite assemblages in quartzite boulders from Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Heron, H.D.C. (2001). Gypsum occurrences at four tillite quarries of coastal Natal. Micro News & Views, 27(2): 11-15. [Reprinted in S.A. Lapidary Magazine, 33(2): 11-18.]
Kaolinite ?
Formula: Al2(Si2O5)(OH)4
Reference: Heron, H.D.C. (1991). Calcite-siderite assemblages in quartzite boulders from Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Heron, H.D.C. (2001). A unique zeolite-bearing prehnite-assemblage sample from the dolerite sill at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Heron, H.D.C. (1996). A partially leached barite-bearing assemblage in a boulder derived from Fissure 4 on level 4 at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
'Manganese Oxides'
Reference: Heron, H.D.C. (1990/1991). A note on manganese dendrite and oxide masses from selected Natal localities. Micro News and Views, 17(1):2-6 and 17(2):2-4); Heron, H.D.C. (1996). Leached assemblages in dolerite boulders from level 3 NE at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
'Manganese Oxides var: Manganese Dendrites'
Reference: Heron, H.D.C. (1990/1991). A note on manganese dendrite and oxide masses from selected Natal localities. Micro News and Views, 17(1):2-6 and 17(2):2-4); Heron, H.D.C. (1996). Leached assemblages in dolerite boulders from level 3 NE at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Reference: Pers. comm. of company geologist to Hugh Heron
'Phillipsite'
Reference: Tschernich, R.W. (1992). Zeolites of the World. Geoscience Press Inc.: Phoenix.
Phillipsite-Ca
Formula: (Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Reference: Heron, H.D.C. (2001). A unique zeolite-bearing prehnite-assemblage sample from the dolerite sill at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Cairncross, B. & Dixon, R. (1995). Minerals of South Africa. Geological Society of South Africa: Linden; Heron, H.D.C. (1972). Coedmore Quarries. July newsletter of the Natal Mineral and Gem Society; Heron, H.D.C. (1996b). Polyhedral prehnite from Coedmore Quarries, Durban. Micro News and Views,23(2); Heron, H.D.C. (2004). Apophyllite-bearing assemblages in brecciated dolerite boulders at Coedmore Quarries, Durban, Natal. Micro News and Views, 30(3): 2-6 and 31(1): 4-9; Heron, H.D.C. (2001). A unique zeolite-bearing prehnite-assemblage sample from the dolerite sill at Coedmore Quarries, Durban. Unpublished report for the Quarry Management.
Pyrite
Formula: FeS2
Reference: Heron, H.D.C. (1972). Coedmore Quarries. July newsletter of the Natal Mineral and Gem Society.
Quartz
Formula: SiO2
Reference: Heron, H.D.C. (1972). Coedmore Quarries. July newsletter of the Natal Mineral and Gem Society; Heron, H.D.C. (2004). Apophyllite-bearing assemblages in brecciated dolerite boulders at Coedmore Quarries, Durban, Natal. Micro News and Views, 30(3): 2-6 and 31(1): 4-9.
Siderite
Formula: FeCO3
Reference: Heron, H.D.C. (1991). Calcite-siderite assemblages in quartzite boulders from Coedmore Quarries, Durban. Unpublished report for the Quarry Management.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Copiapite ?7.DB.35Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Kaolinite ?9.ED.05Al2(Si2O5)(OH)4
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Montmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Phillipsite-Ca9.GC.10(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Chabazite'-
'Chlorite Group'-
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Phillipsite'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Copiapite ?31.10.5.1Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 clays
Montmorillonite71.3.1a.2(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Unclassified Minerals, Mixtures, etc.
'Apophyllite'-
'Chabazite'-
'Chlorite Group'-
Kaolinite ?-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Phillipsite'-
Phillipsite-Ca-(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O

List of minerals for each chemical element

HHydrogen
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
H PrehniteCa2Al2Si3O10(OH)2
H GypsumCaSO4 · 2H2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Goethiteα-Fe3+O(OH)
H LaumontiteCaAl2Si4O12 · 4H2O
H Limonite(Fe,O,OH,H2O)
H Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
H Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
H CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
H KaoliniteAl2(Si2O5)(OH)4
CCarbon
C CalciteCaCO3
C SideriteFeCO3
OOxygen
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O PrehniteCa2Al2Si3O10(OH)2
O BaryteBaSO4
O GypsumCaSO4 · 2H2O
O CalciteCaCO3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O SideriteFeCO3
O Goethiteα-Fe3+O(OH)
O LaumontiteCaAl2Si4O12 · 4H2O
O Limonite(Fe,O,OH,H2O)
O Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
O Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
O CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
O KaoliniteAl2(Si2O5)(OH)4
NaSodium
Na Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Na Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Na Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
MgMagnesium
Mg Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Al PrehniteCa2Al2Si3O10(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Al Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Al KaoliniteAl2(Si2O5)(OH)4
SiSilicon
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si PrehniteCa2Al2Si3O10(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si LaumontiteCaAl2Si4O12 · 4H2O
Si Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Si Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Si KaoliniteAl2(Si2O5)(OH)4
SSulfur
S BaryteBaSO4
S GypsumCaSO4 · 2H2O
S PyriteFeS2
S CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
KPotassium
K Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
K Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
CaCalcium
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Ca PrehniteCa2Al2Si3O10(OH)2
Ca GypsumCaSO4 · 2H2O
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Ca Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyriteFeS2
Fe SideriteFeCO3
Fe Goethiteα-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
BaBarium
Ba BaryteBaSO4
Ba Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Heron, H.D.C. (2004). Apophyllite-bearing assemblages in brecciated dolerite boulders at Coedmore Quarries, Durban, Natal. Micro News and Views, 30(3): 2-6 and 31(1): 4-9.

External Links

- http://www.mindat.org/mesg-7-51966.html [details on minerals listed in unpublished reports]


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