Pegmatite vein intruding (ultra)mafic rocks at the Atagoyama quarry, Takanokura, Nakata Town, Koriyama City.
Located about 6km SE of Koriyama station of JR Tohoku line.
Contact metamorphosed ultramafic rocks are observed at the quarry due to the intrusion of Cretaceous granite and its pegmatite veins.
The ultramafic rocks are included as blocks in amphibolite and gneiss along the western margin of the Abukuma metamorphic belt.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

19 valid minerals.

Rock Types Recorded

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

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1–6.

ⓘ Almandine

Formula: Fe²⁺₃Al₂(SiO₄)₃

References:

ⓘ 'Biotite'

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

References:

ⓘ Brockite

Formula: (Ca,Th,Ce)PO₄ · H₂O

References:

Handbook of Mineralogy

ⓘ Clinochlore

Formula: Mg₅Al(AlSi₃O₁₀)(OH)₈

Colour: blackish green

Description: often partially replacing octahedral pyrochlore crystals and schorl

References:

ⓘ Clinofergusonite-(Y)

Formula: YNbO₄

References:

ⓘ Columbite-(Fe)

Formula: Fe²⁺Nb₂O₆

References:

ⓘ Fergusonite-(Y)

Formula: YNbO₄

References:

ⓘ Grayite

Formula: (Th,Pb,Ca)(PO₄) · H₂O

References:

Terada et al (1994) Chigaku Kenkyu, 43, 181-185.

ⓘ Hydroxycalciomicrolite

Formula: Ca_1.5Ta₂O₆(OH)

Habit: octahedral crystals or anhedral grains up to 10mm across

Colour: dark brown to amber yellow

References:

ⓘ 'K Feldspar'

References:

ⓘ 'Microlite Group'

Formula: A_2-mTa₂X_6-wZ_-n

Habit: octahedral crystals or anhedral grains up to 10mm across

Colour: dark brown to amber yellow

References:

ⓘ Monazite-(Ce)

Formula: Ce(PO₄)

References:

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

ⓘ Népouite

Formula: Ni₃Si₂O₅(OH)₄

References:

Matsubara (1996) Memoirs of the National Science Museum, 29, 33-40.

ⓘ Oxycalciopyrochlore

Formula: Ca₂Nb₂O₆O

Habit: octahedral crystals or anhedral grains up to 10mm across

Colour: dark brown to amber yellow

References:

ⓘ 'Pyrochlore Group'

Formula: A₂Nb₂(O,OH)₆Z

Habit: octahedral crystals or anhedral grains up to 10mm across

Colour: dark brown to amber yellow

References:

ⓘ Quartz

Formula: SiO₂

References:

ⓘ Rutile

Formula: TiO₂

References:

ⓘ Schorl

Formula: NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

References:

ⓘ Sklodowskite

Formula: Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O

Description: minute flakes around crystal rims and along cracks of pyrochlore and microlite crystals.

References:

ⓘ Thorite var. Thorogummite

Formula: (Th,U)(SiO₄)_1-x(OH)_4x

References:

ⓘ Uraninite

Formula: UO₂

References:

ⓘ Zircon

Formula: Zr(SiO₄)

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	'Pyrochlore Group'	4.00.	A₂Nb₂(O,OH)₆Z
ⓘ	'Microlite Group'	4.00.	A_2-mTa₂X_6-wZ_-n
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Rutile	4.DB.05	TiO₂
ⓘ	Columbite-(Fe)	4.DB.35	Fe²⁺Nb₂O₆
ⓘ	Clinofergusonite-(Y)	4.DG.10	YNbO₄
ⓘ	Hydroxycalciomicrolite	4.DH.15	Ca_1.5Ta₂O₆(OH)
ⓘ	Oxycalciopyrochlore	4.DH.15	Ca₂Nb₂O₆O
ⓘ	Uraninite	4.DL.05	UO₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Fergusonite-(Y)	7.GA.05	YNbO₄
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Monazite-(Ce)	8.AD.50	Ce(PO₄)
ⓘ	Grayite	8.CJ.45	(Th,Pb,Ca)(PO₄) · H₂O
ⓘ	Brockite	8.CJ.45	(Ca,Th,Ce)PO₄ · H₂O
Group 9 - Silicates
ⓘ	Almandine	9.AD.25	Fe²⁺₃Al₂(SiO₄)₃
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Thorite var. Thorogummite	9.AD.30	(Th,U)(SiO₄)_1-x(OH)_4x
ⓘ	Sklodowskite	9.AK.10	Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O
ⓘ	Schorl	9.CK.05	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Clinochlore	9.EC.55	Mg₅Al(AlSi₃O₁₀)(OH)₈
ⓘ	Népouite	9.ED.15	Ni₃Si₂O₅(OH)₄
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
Unclassified
ⓘ	'K Feldspar'	-
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Brockite	(Ca,Th,Ce)PO₄ · H₂O
H	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
H	ⓘ Grayite	(Th,Pb,Ca)(PO₄) · H₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Népouite	Ni₃Si₂O₅(OH)₄
H	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
H	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Sklodowskite	Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O
H	ⓘ Thorite var. Thorogummite	(Th,U)(SiO₄)_1-x(OH)_4x
H	ⓘ Hydroxycalciomicrolite	Ca_1.5Ta₂O₆(OH)
B	Boron
B	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Brockite	(Ca,Th,Ce)PO₄ · H₂O
O	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
O	ⓘ Clinofergusonite-(Y)	YNbO₄
O	ⓘ Fergusonite-(Y)	YNbO₄
O	ⓘ Columbite-(Fe)	Fe²⁺Nb₂O₆
O	ⓘ Grayite	(Th,Pb,Ca)(PO₄) · H₂O
O	ⓘ Monazite-(Ce)	Ce(PO₄)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Népouite	Ni₃Si₂O₅(OH)₄
O	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
O	ⓘ Quartz	SiO₂
O	ⓘ Rutile	TiO₂
O	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Sklodowskite	Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O
O	ⓘ Thorite var. Thorogummite	(Th,U)(SiO₄)_1-x(OH)_4x
O	ⓘ Uraninite	UO₂
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Oxycalciopyrochlore	Ca₂Nb₂O₆O
O	ⓘ Hydroxycalciomicrolite	Ca_1.5Ta₂O₆(OH)
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	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Mg	ⓘ Sklodowskite	Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Népouite	Ni₃Si₂O₅(OH)₄
Si	ⓘ Quartz	SiO₂
Si	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Sklodowskite	Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O
Si	ⓘ Thorite var. Thorogummite	(Th,U)(SiO₄)_1-x(OH)_4x
Si	ⓘ Zircon	Zr(SiO₄)
P	Phosphorus
P	ⓘ Brockite	(Ca,Th,Ce)PO₄ · H₂O
P	ⓘ Grayite	(Th,Pb,Ca)(PO₄) · H₂O
P	ⓘ Monazite-(Ce)	Ce(PO₄)
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Brockite	(Ca,Th,Ce)PO₄ · H₂O
Ca	ⓘ Grayite	(Th,Pb,Ca)(PO₄) · H₂O
Ca	ⓘ Oxycalciopyrochlore	Ca₂Nb₂O₆O
Ca	ⓘ Hydroxycalciomicrolite	Ca_1.5Ta₂O₆(OH)
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Rutile	TiO₂
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	ⓘ Columbite-(Fe)	Fe²⁺Nb₂O₆
Fe	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Ni	Nickel
Ni	ⓘ Népouite	Ni₃Si₂O₅(OH)₄
Y	Yttrium
Y	ⓘ Clinofergusonite-(Y)	YNbO₄
Y	ⓘ Fergusonite-(Y)	YNbO₄
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Nb	Niobium
Nb	ⓘ Clinofergusonite-(Y)	YNbO₄
Nb	ⓘ Fergusonite-(Y)	YNbO₄
Nb	ⓘ Columbite-(Fe)	Fe²⁺Nb₂O₆
Nb	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
Nb	ⓘ Oxycalciopyrochlore	Ca₂Nb₂O₆O
Ce	Cerium
Ce	ⓘ Brockite	(Ca,Th,Ce)PO₄ · H₂O
Ce	ⓘ Monazite-(Ce)	Ce(PO₄)
Ta	Tantalum
Ta	ⓘ Microlite Group	A_2-mTa₂X_6-wZ_-n
Ta	ⓘ Hydroxycalciomicrolite	Ca_1.5Ta₂O₆(OH)
Pb	Lead
Pb	ⓘ Grayite	(Th,Pb,Ca)(PO₄) · H₂O
Th	Thorium
Th	ⓘ Brockite	(Ca,Th,Ce)PO₄ · H₂O
Th	ⓘ Grayite	(Th,Pb,Ca)(PO₄) · H₂O
Th	ⓘ Thorite var. Thorogummite	(Th,U)(SiO₄)_1-x(OH)_4x
U	Uranium
U	ⓘ Sklodowskite	Mg(UO₂)₂(SiO₃OH)₂ · 6H₂O
U	ⓘ Thorite var. Thorogummite	(Th,U)(SiO₄)_1-x(OH)_4x
U	ⓘ Uraninite	UO₂

Other Regions, Features and Areas containing this locality

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References

Yashima, R. and Nakadohri Collaborative Research Group (1981) Metamorphic rock belts in Nakadohri and Kawageta (I) — crystalline schist and ultramafic rocks in Nakadohri district —. Science Report of Fukushima University, 31, 109–126 (in Japanese).

Matsubara, S. (1996) Minerals in contact metamorphosed ultramafic rocks from Atagoyama, Abukuma Plateau, Japan, with special reference to nepouite-like mineral. Memoirs of National Science Museum, Tokyo, 29, 33–40.

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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

References

Atagoyama, Koriyama City, Fukushima Prefecture, Japan i
Regional Level Types
Atagoyama - not defined -
Koriyama City City
Fukushima Prefecture Prefecture
Japan Country