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:
Hamada City, Shimane, Japan

Oldest recorded age at locality: 84.7
Youngest recorded age at locality: 63.5

mindat Locality ID: 227134
mindat URL: http://www.mindat.org/loc-227134.html

Tectonic Settings:

Total number of sublocalities beneath "Hamada City, Shimane, Japan": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Hamada Alkaline Volcanics
Ohgusoyama

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.

Corundum	Feldspar	Gismondine	Harmotome	Melilite	Natrolite	None	Pyroxene	Spinel	Tridymite
Zircon

Aegirine ()*	Åkermanite ()*	Anorthite ()*	Augite ()*	Diopside ()*
Enstatite ()*	Gismondine ()*	Gonnardite ()*	Hercynite ()*	Ilmenite ()*
Magnetite ()*	Nepheline ()*	Phillipsite-K ()*	Zircon ()*

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: Al Ca Fe H K Mg Na O Si Ti Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Corundum Feldspar Gismondine Harmotome Melilite Natrolite None Pyroxene Spinel Tridymite
Zircon

14 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	84.7	63.5	1	76381	1022
Åkermanite ()*	Melilite	Ca₂MgSi₂O₇	84.7	63.5	1	76381	50
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	84.7	63.5	1	76382	1036
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	84.7	63.5	1	76382	2060
Diopside ()*	Pyroxene	CaMgSi₂O₆	84.7	63.5	1	76382	4135
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	84.7	63.5	1	76382	944
Gismondine ()*	Gismondine	Ca₂(Si₄Al₄)O₁₆·8H₂O	84.7	63.5	1	76381	128
Gonnardite ()*	Natrolite	(Na,Ca)₂(Si,Al)₅O₁₀·3H₂O	84.7	63.5	1	76381	167
Hercynite ()*	Spinel	Fe²⁺Al₂O₄	84.7	63.5	1	76382	407
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	84.7	63.5	1	76382	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	84.7	63.5	1	76382	14899
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	84.7	63.5	1	76381	884
Phillipsite-K ()*	Harmotome	K₆(Si₁₀Al₆)O₃₂·12H₂O	84.7	63.5	1	76381	71
Zircon ()*	Zircon	Zr(SiO₄)	84.7	63.5	1	76382	5251

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	Age from other Locality	Dated Mineral	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Mo-00222	69.7	64.5	67.1±2.6	Re-Os	molybdenite	Takagigawa (Tg)	Yes	Molybdenite	Mo	218607	Hirose, Shimane, Japan	Hirose, Shimane	Suzuki et al. (1996)	10.1016/0016-7037(96)00164-0	GCA60_3151
Mo-00223	68.3	63.5	65.9±2.4	Re-Os	molybdenite	Takagigawa (Tg)	Yes	Molybdenite	Mo	218607	Hirose, Shimane, Japan	Hirose, Shimane	Suzuki et al. (1996)	10.1016/0016-7037(96)00164-0	GCA60_3151
Kristen001925	84.7	78.1	81.4±3.3	K-Ar	biotite	71Y-12	Yes			19893	Tsumo Mine, Masuda, Shimane, Japan	Tsumo	Shibata and Ishihara (1974)	10.2113/gsecongeo.69.8.1207	EG69_1207
Kristen001926	81.8	75.4	78.6±3.2	K-Ar	phlogopite		Yes	Phlogopite		19893	Tsumo Mine, Masuda, Shimane, Japan	Tsumo	Shibata and Ishihara (1974)	10.2113/gsecongeo.69.8.1207	EG69_1207

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...