Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Toyoguchi Mine (Toyokuchi Mine), Yamagata, Kuji City, Iwate, Japan

Oldest recorded age at locality: 133.6
Youngest recorded age at locality: 112

mindat Locality ID: 130478
mindat URL: http://www.mindat.org/loc-130478.html

Tectonic Settings:

Total number of sublocalities beneath "Toyoguchi Mine (Toyokuchi Mine), Yamagata, Kuji City, Iwate, Japan": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Allophane	Calcite	Coronadite	None	Olivine	Ramsdellite	Rhodonite	Rutile	Spinel

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: C Ca Fe H K Mn Na O Si

Elements from minerals reported directly at this locality: C Ca Fe H K Mn Na O Si

Structural Groups for minerals in this locality:
Allophane Calcite Coronadite None Olivine Ramsdellite Rhodonite Rutile Spinel

10 IMA Minerals at location:

Birnessite ()*	Calcite ()*	Cryptomelane ()*	Hausmannite ()*	Neotocite ()*
Pyrolusite ()*	Ramsdellite ()*	Rhodochrosite ()*	Rhodonite ()*	Tephroite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Birnessite ()*	None	(Na,Ca,K)_0.6(Mn⁴⁺,Mn³⁺)₂O₄·1.5H₂O	133.6	112	178
Calcite ()*	Calcite	Ca(CO₃)	133.6	112	27770
Cryptomelane ()*	Coronadite	K(Mn⁴⁺₇Mn³⁺)O₁₆	133.6	112	599
Hausmannite ()*	Spinel	Mn²⁺Mn³⁺₂O₄	133.6	112	350
Neotocite ()*	Allophane	(Mn,Fe)SiO₃·H₂O (?)	133.6	112	186
Pyrolusite ()*	Rutile	MnO₂	133.6	112	3106
Ramsdellite ()*	Ramsdellite	MnO₂	133.6	112	88
Rhodochrosite ()*	Calcite	Mn(CO₃)	133.6	112	1711
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)	133.6	112	969
Tephroite ()*	Olivine	Mn²⁺₂(SiO₄)	133.6	112	240

2 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Mo-00294	133.6	122.4	128.0±5.6	Re-Os			molybdenite	Okawame (Ok)		Yes	Molybdenite		Mo	106920	Ohkawame Mine (Okawame Mine), Kuji City, Iwate, Japan	Kuji, lwate	Suzuki et al. (1996)	10.1016/0016-7037(96)00164-0	GCA60_3151
	Mo-00295	119.8	112	115.9±3.9	Re-Os			molybdenite	Okawame (Ok)		Yes	Molybdenite		Mo	106920	Ohkawame Mine (Okawame Mine), Kuji City, Iwate, Japan	Kuji, lwate	Suzuki et al. (1996)	10.1016/0016-7037(96)00164-0	GCA60_3151

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...