Chromium-rich eclogite body found as a few small (<5 m) outcrops in a bog close to the lake Nordre Holmevatnet ca. 18.5 km northeast of Tromsø.
Belongs to the tectonostratigraphic unit Tromsø Nappe (in Norwegian Tromsødekket) the uppermost part of the Uppermost Allochthon of the Scandinavian Caledonides.

Also silicate-bearing carbonate rocks, that contain, i.a., fluorapatite-hydroxylapatite with inclusions of pyrrhotite, anhydrite and dolomite. This apatite-group species probably contains traces of cyanide (CN^-) ions (!).

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

15 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

ⓘ Eclogite

ⓘ Peridotite

Detailed Mineral List:

ⓘ 'Allanite Group'

Formula: (A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

References:

Broska, Igor, Krogh Ravna, Erling J., Vojtko, Peter, Janák, Marian, Konečný, Patrik, Pentrák, Martin, Bačík, Peter, Luptáková, Jarmila, Kullerud, Kåre (2014) Oriented inclusions in apatite in a post-UHP fluid-mediated regime (Tromsø Nappe, Norway) European Journal of Mineralogy, 26 (5) 623-634 doi:10.1127/0935-1221/2014/0026-2396

ⓘ Anhydrite

Formula: CaSO₄

References:

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ Calcite var. Mg-rich Calcite

Formula: (Ca,Mg)CO₃

References:

ⓘ 'Chrome-Kyanite'

Formula: (Al,Cr)₂SiO₅

References:

Janák, Marian, Uher, Pavel, Ravna, Erling Krogh, Kullerud, Kåre, Vrabec, Mirijam (2015) Chromium-rich kyanite, magnesiostaurolite and corundum in ultrahigh-pressure eclogites (examples from Pohorje Mountains, Slovenia and Tromsø Nappe, Norway) European Journal of Mineralogy, 27 (3) 377-392 doi:10.1127/ejm/2015/0027-2436

ⓘ 'Chrome-Spinel (of Dana)'

References:

ⓘ 'Chromium-bearing Magnesiostaurolite'

Formula: Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄

References:

ⓘ 'Clinopyroxene Subgroup'

References:

ⓘ Corundum

Formula: Al₂O₃

References:

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

ⓘ Kyanite

Formula: Al₂(SiO₄)O

References:

ⓘ Magnesio-hornblende

Formula: ◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂

References:

ⓘ Magnesiostaurolite

Formula: Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄

References:

ⓘ Pargasite ?

Formula: NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂

References:

ⓘ Phlogopite

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

References:

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

ⓘ Pyrrhotite

Formula: Fe_1-xS

References:

ⓘ Sapphirine

Formula: Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]

References:

ⓘ Sapphirine var. Chromium-bearing Sapphirine

Formula: Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]

References:

ⓘ Spinel

Formula: MgAl₂O₄

References:

ⓘ Zircon

Formula: Zr(SiO₄)

References:

ⓘ Zoisite

Formula: (CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
Group 4 - Oxides and Hydroxides
ⓘ	Spinel	4.BB.05	MgAl₂O₄
ⓘ	Corundum	4.CB.05	Al₂O₃
Group 5 - Nitrates and Carbonates
ⓘ	Calcite var. Mg-rich Calcite	5.AB.05	(Ca,Mg)CO₃
ⓘ		5.AB.05	CaCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Anhydrite	7.AD.30	CaSO₄
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Kyanite	9.AF.15	Al₂(SiO₄)O
ⓘ	Magnesiostaurolite	9.AF.30	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
ⓘ	Zoisite	9.BG.10	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
ⓘ	Magnesio-hornblende	9.DE.10	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
ⓘ	Pargasite ?	9.DE.15	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
ⓘ	Sapphirine var. Chromium-bearing Sapphirine	9.DH.45	Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]
ⓘ		9.DH.45	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]
ⓘ	Phlogopite	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
Unclassified
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Chrome-Kyanite'	-	(Al,Cr)₂SiO₅
ⓘ	'Chrome-Spinel (of Dana)'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Allanite Group'	-	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	'Chromium-bearing Magnesiostaurolite'	-	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
ⓘ	'Clinopyroxene Subgroup'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Magnesiostaurolite	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
H	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
H	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
H	ⓘ Zoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
H	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
Li	Lithium
Li	ⓘ Magnesiostaurolite	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
Li	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Dolomite	CaMg(CO₃)₂
C	ⓘ Calcite var. Mg-rich Calcite	(Ca,Mg)CO₃
O	Oxygen
O	ⓘ Anhydrite	CaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Corundum	Al₂O₃
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Kyanite	Al₂(SiO₄)O
O	ⓘ Magnesiostaurolite	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
O	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
O	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]
O	ⓘ Spinel	MgAl₂O₄
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Zoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Chrome-Kyanite	(Al,Cr)₂SiO₅
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Calcite var. Mg-rich Calcite	(Ca,Mg)CO₃
O	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
O	ⓘ Sapphirine var. Chromium-bearing Sapphirine	Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Mg	ⓘ Magnesiostaurolite	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
Mg	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Mg	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Mg	ⓘ Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]
Mg	ⓘ Spinel	MgAl₂O₄
Mg	ⓘ Calcite var. Mg-rich Calcite	(Ca,Mg)CO₃
Mg	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
Mg	ⓘ Sapphirine var. Chromium-bearing Sapphirine	Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]
Al	Aluminium
Al	ⓘ Corundum	Al₂O₃
Al	ⓘ Kyanite	Al₂(SiO₄)O
Al	ⓘ Magnesiostaurolite	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
Al	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Al	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	ⓘ Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]
Al	ⓘ Spinel	MgAl₂O₄
Al	ⓘ Zoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Al	ⓘ Chrome-Kyanite	(Al,Cr)₂SiO₅
Al	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
Al	ⓘ Sapphirine var. Chromium-bearing Sapphirine	Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]
Si	Silicon
Si	ⓘ Kyanite	Al₂(SiO₄)O
Si	ⓘ Magnesiostaurolite	Mg(Mg,Li)₃(Al,Mg)₁₈Si₈O₄₄(OH)₄
Si	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Si	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	ⓘ Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Zoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Chrome-Kyanite	(Al,Cr)₂SiO₅
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
Si	ⓘ Sapphirine var. Chromium-bearing Sapphirine	Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
S	Sulfur
S	ⓘ Anhydrite	CaSO₄
S	ⓘ Pyrrhotite	Fe_1-xS
K	Potassium
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Anhydrite	CaSO₄
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Ca	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Ca	ⓘ Zoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ca	ⓘ Calcite var. Mg-rich Calcite	(Ca,Mg)CO₃
Cr	Chromium
Cr	ⓘ Chrome-Kyanite	(Al,Cr)₂SiO₅
Cr	ⓘ Chromium-bearing Magnesiostaurolite	Mg(Mg,Li)₃(Al,Cr,Mg)₁₈Si₈O₄₄(OH)₄
Cr	ⓘ Sapphirine var. Chromium-bearing Sapphirine	Mg₄(Mg₃(Al,Cr)₉)O₄[Si₃Al₉O₃₆]
Fe	Iron
Fe	ⓘ Pyrrhotite	Fe_1-xS
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

Norway

⭔TromsCounty

ScandinaviaRegion

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Nordre Holmevatnet, Tromsø, Troms og Finnmark, NorwayiRegional Level TypesNordre HolmevatnetOutcrop TromsøMunicipality Troms og FinnmarkCounty NorwayCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Rock Types Recorded

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

Nordre Holmevatnet, Tromsø, Troms og Finnmark, Norway i
Regional Level Types
Nordre Holmevatnet Outcrop
Tromsø Municipality
Troms og Finnmark County
Norway Country