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Ichinokawa mine, Saijo City, Ehime Prefecture, Shikoku Island, Japan

This page kindly sponsored by Ruggy Holloway
Key
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Name(s) in local language(s):愛媛県 西条市 市之川鉱山
Latitude & Longitude (WGS84): 33° 53' 20'' North , 133° 13' 9'' East
Latitude & Longitude (decimal): 33.88889,133.21944
GeoHash:G#: wyn8z3r3n
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate


Famous for its marvelous stibnite specimens, now found in museums around the world. The best specimens were found in the late 19th century, during peak productivity of the mine (16,600 tons Sb produced from 1875 to 1900). Closed in the 1950s. Locality labels for these specimens often under the obsolete name "Iyo province". The mine produced the antimony used in the bronze casting of the Great Buddha of Nara in 748 AD.

Simple stibnite-quartz veins cut across Cretaceous or Tertiary conglomerates and the underlying Sambagawa Belt schists and phyllites. The veins have been totally worked out, and it is hard to find even traces of stibnite here now.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 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

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Reference: Geology and Mineral Resources of Japan (Geological Survey of Japan, 1960)
Calcite
Formula: CaCO3
Reference: Tsunashirō Wada (1904) Minerals of Japan. Tokyo
Cinnabar
Formula: HgS
Description: with stibnite and pyrite
Reference: Dr. Matsuo Nambu collection (curated by the Geological Survey of Japan)
'Conglomerate'
Description: Eocene
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
Coquandite
Formula: Sb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
Reference: specimens seen at Kyoto show, 2010
'Graphitic schist'
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
Klebelsbergite
Formula: Sb4O4(SO4)(OH)2
Reference: specimens seen at Kyoto show, 2010
Magnesite
Formula: MgCO3
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
'Magnesite-stone'
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
'Peridotite'
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
'Phyllite'
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
Pyrite
Formula: FeS2
Reference: Geology and Mineral Resources of Japan (Geological Survey of Japan, 1960)
Quartz
Formula: SiO2
Reference: Tsunashirō Wada (1904) Minerals of Japan. Tokyo
'Sandstone'
Description: Eocene
Reference: "The Story of Ichinokawa Mine" (Ichinokawa Community Center, 38pp)
'Stibiconite'
Formula: Sb3+Sb5+2O6(OH)
Reference: University of Tokyo collection; Tsunashirō Wada (1904) Minerals of Japan. Tokyo
Stibnite
Formula: Sb2S3
Reference: [Min.Rec.:20:24.]; Tsunashirō Wada (1904) Minerals of Japan.; Harada, Zyunpéi (1954) Chemical Analyses of Japanese Minerals (III). Journal of the Faculty of Science, Hokkaido University, Series 4, Geology and mineralogy = 北海道大學理學部紀要, 8(4): 289-348.; Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp.
Valentinite
Formula: Sb2O3
Reference: specimens seen at Kyoto show, 2010

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
'Cinnabar'2.CD.15aHgS
'Pyrite'2.EB.05aFeS2
'Stibnite'2.DB.05Sb2S3
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
'Stibiconite'4.DH.20Sb3+Sb5+2O6(OH)
'Valentinite'4.CB.55Sb2O3
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Magnesite'5.AB.05MgCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Coquandite'7.DE.35Sb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
'Klebelsbergite'7.BB.35Sb4O4(SO4)(OH)2
Unclassified Minerals, Rocks, etc.
'Conglomerate'-
'Graphitic schist'-
'Magnesite-stone'-
'Peridotite'-
'Phyllite'-
'Sandstone'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Valentinite4.3.11.1Sb2O3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Magnesite14.1.1.2MgCO3
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Coquandite30.1.18.1Sb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
Klebelsbergite30.1.5.1Sb4O4(SO4)(OH)2
Group 44 - ANTIMONATES
A2X2O6(O,OH,F)
'Stibiconite'44.1.1.1Sb3+Sb5+2O6(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Conglomerate'-
'Graphitic schist'-
'Magnesite-stone'-
'Peridotite'-
'Phyllite'-
'Sandstone'-

List of minerals for each chemical element

HHydrogen
H CoquanditeSb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
H KlebelsbergiteSb4O4(SO4)(OH)2
H StibiconiteSb3+Sb25+O6(OH)
CCarbon
C CalciteCaCO3
C MagnesiteMgCO3
OOxygen
O CalciteCaCO3
O CoquanditeSb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
O KlebelsbergiteSb4O4(SO4)(OH)2
O MagnesiteMgCO3
O QuartzSiO2
O StibiconiteSb3+Sb25+O6(OH)
O ValentiniteSb2O3
MgMagnesium
Mg MagnesiteMgCO3
SiSilicon
Si QuartzSiO2
SSulfur
S ArsenopyriteFeAsS
S CinnabarHgS
S CoquanditeSb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
S KlebelsbergiteSb4O4(SO4)(OH)2
S PyriteFeS2
S StibniteSb2S3
CaCalcium
Ca CalciteCaCO3
FeIron
Fe ArsenopyriteFeAsS
Fe PyriteFeS2
AsArsenic
As ArsenopyriteFeAsS
SbAntimony
Sb CoquanditeSb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
Sb KlebelsbergiteSb4O4(SO4)(OH)2
Sb StibiconiteSb3+Sb25+O6(OH)
Sb StibniteSb2S3
Sb ValentiniteSb2O3
HgMercury
Hg CinnabarHgS

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Triassic - Late Paleozoic
201.3 - 358.9 Ma



ID: 3189408
Paleozoic-Mesozoic sedimentary rocks

Age: Phanerozoic (201.3 - 358.9 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bancroft, P. (1988) The Ichinokawa Mine, Japan. Mineralogical Record, 19(4), 229-238.
Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007) Mineral Resources Map of East Asia. Geological Survey of Japan.
Okazaki, Y. (2012) Antimonit von Shikoku, Japan - ein historischer Fund. Lapis, 37(11), 41 (in German).

External Links



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