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Hokko prospect, Ofuna river, Kameda Peninsula, Oshima Subprefecture, Hokkaidō, Japan i
Regional Level Types
Hokko prospect Prospect
Ofuna river River
Kameda Peninsula Peninsula
Oshima Subprefecture Subprefecture
Hokkaidō Prefecture
Japan Country

Regional Level Types
Hokko prospect	Prospect
Ofuna river	River
Kameda Peninsula	Peninsula
Oshima Subprefecture	Subprefecture
Hokkaidō	Prefecture
Japan	Country

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Key

Latitude & Longitude:

43° North , 142° East (est.)

Estimate based on other nearby localities or region boundaries.

Margin of Error:

~338km

Locality type:

Prospect

Low-sulphidation, epithermal gold deposit.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

8 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Andesite

Detailed Mineral List:

ⓘ Calcite

Formula: CaCO₃

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ 'Chlorite Group'

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ 'Electrum'

Formula: (Au, Ag)

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Gold

Formula: Au

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.; Watanabe, Y., Aoki, M., & Nakajima, N. (1996). Age and style of epithermal gold mineralization in the Minamikayabe area, southwestern Hokkaido. Shigen-Chishitsu, 46(260), 317-326.

ⓘ 'K Feldspar'

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ 'K Feldspar var: Adularia'

Formula: KAlSi₃O₈

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Muscovite var: Illite

Formula: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Pyrite

Formula: FeS₂

ⓘ Quartz

Formula: SiO₂

ⓘ Quartz var: Chalcedony

Formula: SiO₂

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ 'Smectite Group'

Formula: A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Sphalerite

Formula: ZnS

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

ⓘ Wairakite

Formula: Ca(Al₂Si₄O₁₂) · 2H₂O

Reference: Scott, A.-M., and Watanabe, Y. (1998): Mineralium Deposita 33, 568-578.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	'Electrum'	1.AA.05	(Au, Ag)
ⓘ	Gold	1.AA.05	Au
Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Sphalerite	2.CB.05a	ZnS
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	var: Chalcedony	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var: Illite	9.EC.15	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ	Wairakite	9.GB.05	Ca(Al₂Si₄O₁₂) · 2H₂O
Unclassified Minerals, Rocks, etc.
ⓘ	'Chlorite Group'	-
ⓘ	'K Feldspar'	-
ⓘ	'var: Adularia'	-	KAlSi₃O₈
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
ⓘ	Gold	1.1.1.1	Au
Group 2 - SULFIDES
A_mX_p, with m:p = 1:1
ⓘ	Sphalerite	2.8.2.1	ZnS
A_mB_nX_p, with (m+n):p = 1:2
ⓘ	Pyrite	2.12.1.1	FeS₂
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO₃)
ⓘ	Calcite	14.1.1.1	CaCO₃
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
ⓘ	Muscovite	71.2.2a.1	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var: Illite	71.2.2d.2	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO₂ with [4] coordinated Si
ⓘ	Quartz	75.1.3.1	SiO₂
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
ⓘ	Laumontite	77.1.1.4	CaAl₂Si₄O₁₂ · 4H₂O
ⓘ	Wairakite	77.1.1.3	Ca(Al₂Si₄O₁₂) · 2H₂O
Unclassified Minerals, Mixtures, etc.
ⓘ	'Chlorite Group'	-
ⓘ	'Electrum'	-	(Au, Ag)
ⓘ	'K Feldspar'	-
ⓘ	'var: Adularia'	-	KAlSi₃O₈
ⓘ	Quartz var: Chalcedony	-	SiO₂
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
H	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
H	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Quartz	SiO₂
O	ⓘ K Feldspar (var: Adularia)	KAlSi₃O₈
O	ⓘ Calcite	CaCO₃
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
O	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
O	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
O	ⓘ Quartz (var: Chalcedony)	SiO₂
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	Aluminium
Al	ⓘ K Feldspar (var: Adularia)	KAlSi₃O₈
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
Al	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Quartz	SiO₂
Si	ⓘ K Feldspar (var: Adularia)	KAlSi₃O₈
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
Si	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	ⓘ Quartz (var: Chalcedony)	SiO₂
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
S	Sulfur
S	ⓘ Pyrite	FeS₂
S	ⓘ Sphalerite	ZnS
K	Potassium
K	ⓘ K Feldspar (var: Adularia)	KAlSi₃O₈
K	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
Fe	Iron
Fe	ⓘ Pyrite	FeS₂
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
Ag	Silver
Ag	ⓘ Electrum	(Au, Ag)
Au	Gold
Au	ⓘ Electrum	(Au, Ag)
Au	ⓘ Gold	Au

References

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- Scott, A.-M., and Watanabe, Y. (1998): "Extreme boiling" model for variable salinity of the Hokko low-sulfidation epithermal Au prospect, southwestern Hokkaido, Japan. Mineralium Deposita 33, 568-578.

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