The Steel Mountain complex is one of a series of Proterozoic inliers along the northwestern margin of the Appalachian Orogen in western Newfoundland and Cape Breton Island. The complex includes well-known magnetite deposits at the Bishop North and Bishop South localities. In 1997, Loadstone Limited developed two quarries in the deposit.
The Steel Mountain complex is some 50 km long and consists principally of anorthosite and gabbronorite. Diabase dykes with deformed margins cut the Steel Mountain anorthosite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Iron - Magnetite

ⓘ Titanium

ⓘ Trap rock

Mineral List

21 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Pe-Piper, Georgia, Piper, David J. W., Dessureau, Gilles (2024) Mineralogy of the Steel Mountain Anorthosite Complex, Western Newfoundland Appalachians, Canada: Petrogenesis and Tectonic Affinity. Minerals, 14 (1) doi:10.3390/min14010081

ⓘ Albite var. Andesine

Formula: (Na,Ca)[Al(Si,Al)Si₂O₈]

References:

ⓘ Almandine

Formula: Fe²⁺₃Al₂(SiO₄)₃

References:

ⓘ Antigorite

Formula: Mg₃(Si₂O₅)(OH)₄

References:

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

References:

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

ⓘ 'Chlorite Group'

References:

ⓘ Corundum

Formula: Al₂O₃

References:

ⓘ Diopside

Formula: CaMgSi₂O₆

References:

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

References:

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

ⓘ Hercynite

Formula: Fe²⁺Al₂O₄

References:

ⓘ 'Hypersthene'

Formula: (Mg,Fe)SiO₃

References:

ⓘ 'Iddingsite'

Formula: MgO · Fe₂O₃ · 3SiO₂ · 4H₂O

References:

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

ⓘ 'K Feldspar'

References:

ⓘ Magnesio-hornblende

Formula: ◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂

References:

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

ⓘ 'Olivine Group'

Formula: M₂SiO₄

References:

ⓘ Pargasite

Formula: NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂

References:

ⓘ Pentlandite

Formula: (Ni_xFe_y)_Σ9S₈

References:

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ Pyrrhotite

Formula: Fe_1-xS

References:

ⓘ 'Smectite Group'

Formula: A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

References:

ⓘ Spinel

Formula: MgAl₂O₄

References:

ⓘ Talc

Formula: Mg₃Si₄O₁₀(OH)₂

References:

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

ⓘ Tschermakite

Formula: ◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂

References:

ⓘ Zircon

Formula: Zr(SiO₄)

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Pentlandite	2.BB.15	(Ni_xFe_y)_Σ9S₈
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Hercynite	4.BB.05	Fe²⁺Al₂O₄
ⓘ	Spinel	4.BB.05	MgAl₂O₄
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Corundum	4.CB.05	Al₂O₃
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Almandine	9.AD.25	Fe²⁺₃Al₂(SiO₄)₃
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Tschermakite	9.DE.10	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
ⓘ	Magnesio-hornblende	9.DE.10	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
ⓘ	Pargasite	9.DE.15	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
ⓘ	Talc	9.EC.05	Mg₃Si₄O₁₀(OH)₂
ⓘ	Antigorite	9.ED.15	Mg₃(Si₂O₅)(OH)₄
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Andesine	9.FA.35	(Na,Ca)[Al(Si,Al)Si₂O₈]
Unclassified
ⓘ	'Hypersthene'	-	(Mg,Fe)SiO₃
ⓘ	'Chlorite Group'	-
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Iddingsite'	-	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'K Feldspar'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
ⓘ	'Olivine Group'	-	M₂SiO₄

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
H	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
H	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
H	ⓘ Tschermakite	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
H	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
H	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
O	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
O	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Corundum	Al₂O₃
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Hercynite	Fe²⁺Al₂O₄
O	ⓘ Hypersthene	(Mg,Fe)SiO₃
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
O	ⓘ Spinel	MgAl₂O₄
O	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Tschermakite	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
O	ⓘ Olivine Group	M₂SiO₄
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Na	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Hypersthene	(Mg,Fe)SiO₃
Mg	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Mg	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Mg	ⓘ Spinel	MgAl₂O₄
Mg	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Mg	ⓘ Tschermakite	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
Mg	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Al	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Corundum	Al₂O₃
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Hercynite	Fe²⁺Al₂O₄
Al	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Al	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Al	ⓘ Spinel	MgAl₂O₄
Al	ⓘ Tschermakite	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Si	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
Si	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Hypersthene	(Mg,Fe)SiO₃
Si	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Si	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Si	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Tschermakite	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Olivine Group	M₂SiO₄
S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Pentlandite	(Ni_xFe_y)_Σ9S₈
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ca	Calcium
Ca	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Ca	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Tschermakite	◻(Ca₂)(Mg₃Al₂)(Al₂Si₆O₂₂)(OH)₂
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Hercynite	Fe²⁺Al₂O₄
Fe	ⓘ Hypersthene	(Mg,Fe)SiO₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Pentlandite	(Ni_xFe_y)_Σ9S₈
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Fe	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
Ni	Nickel
Ni	ⓘ Pentlandite	(Ni_xFe_y)_Σ9S₈
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)

Other Regions, Features and Areas containing this locality

Canada

Newfoundland and Labrador
- Newfoundland
  - Island of NewfoundlandIsland

North America PlateTectonic Plate

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References

[1]Pe-Piper, Georgia, Piper, David J. W., Dessureau, Gilles (2024) Mineralogy of the Steel Mountain Anorthosite Complex, Western Newfoundland Appalachians, Canada: Petrogenesis and Tectonic Affinity. Minerals, 14 (1) doi:10.3390/min14010081

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