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:
Obayashi Mine, Ochi District, Shimane, Japan

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

mindat Locality ID: 303993
mindat URL: http://www.mindat.org/loc-303993.html

Tectonic Settings:

Total number of sublocalities beneath "Obayashi Mine, Ochi District, Shimane, 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.

Acanthite	Arsenopyrite	Chalcopyrite	Copper	Marcasite	Nickeline	None	Pyrite	Rocksalt	Sphalerite

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: Ag As Cu Fe Pb S Zn

Elements from minerals reported directly at this locality: Ag As Cu Fe Pb S Zn

Structural Groups for minerals in this locality:
Acanthite Arsenopyrite Chalcopyrite Copper Marcasite Nickeline None Pyrite Rocksalt Sphalerite

9 IMA Minerals at location:

Acanthite ()*	Arsenopyrite ()*	Chalcopyrite ()*	Galena ()*	Marcasite ()*
Pyrite ()*	Pyrrhotite ()*	Silver ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Acanthite ()*	Acanthite	Ag₂S	84.7	63.5	2793
Arsenopyrite ()*	Arsenopyrite	FeAsS	84.7	63.5	9052
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	84.7	63.5	27198
Galena ()*	Rocksalt	PbS	84.7	63.5	24243
Marcasite ()*	Marcasite	FeS₂	84.7	63.5	5674
Pyrite ()*	Pyrite	FeS₂	84.7	63.5	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	84.7	63.5	9056
Silver ()*	Copper	Ag	84.7	63.5	5186
Sphalerite ()*	Sphalerite	ZnS	84.7	63.5	21482

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

All locality data graciously provided by mindat.org

All age data...