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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Diamond-bearing lherzolite, Shingu, Shikokuchuo City, Ehime Prefecture, Japani
Regional Level Types
Diamond-bearing lherzolite- not defined -
Shingu- not defined -
Shikokuchuo CityCity
Ehime PrefecturePrefecture
JapanCountry

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Latitude & Longitude (WGS84):
33° 57' 12'' North , 133° 39' 4'' East
Latitude & Longitude (decimal):
33.95343,133.65119
GeoHash:
G#: wyp11m1c4
GRN:
N23E80
Age:
17.7 ± .5 Ma
Geologic Time:
Miocene
Dating method:
K-Ar
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Kawanoechō37,641 (2017)9.7km
Ikedachō15,895 (2017)16.5km
Kan’onjichō44,363 (2016)19.4km
Niihama123,059 (2017)31.9km
Tadotsu23,514 (2017)36.9km
Mindat Locality ID:
259003
Long-form identifier:
mindat:1:2:259003:8
GUID (UUID V4):
0


Diamonds created in a subduction zone that were subsequently transported to surface. Rose from depths of around 160 km (~5.5. GPa) and cooled from temperatures of ~1500 °C.

Two dikes are exposed along the Umatate River

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List


3 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

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘDiamond1.CB.10aC
Group 4 - Oxides and Hydroxides
ⓘSpinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
ⓘDolomite ?5.AB.10CaMg(CO3)2
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CCarbon
Cⓘ DiamondC
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ DolomiteCaMg(CO3)2
Oⓘ SpinelMgAl2O4
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ SpinelMgAl2O4
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ SpinelMgAl2O4
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Other Regions, Features and Areas containing this locality

Amur PlateTectonic Plate
AsiaContinent
Eurasian Plate
Japan

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Mizukami T., Wallis S., Enami M., Kagi H. (2008) Forearc diamond from Japan. Geology, Vol. 36, No. 3, p. 219.
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