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:
Shikuma, Gotsu City, Shimane, Japan

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

mindat Locality ID: 268650
mindat URL: http://www.mindat.org/loc-268650.html

Tectonic Settings:

Total number of sublocalities beneath "Shikuma, Gotsu City, 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.

Amphibole	Calcite	Clinozoisite	Epidote	Feldspar	Lawsonite	None	Quartz	Titanite

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 C Ca Fe H Mg Na O Si Ti

Elements from minerals reported directly at this locality: Al C Ca Fe H Mg Na O Si Ti

Structural Groups for minerals in this locality:
Amphibole Calcite Clinozoisite Epidote Feldspar Lawsonite None Quartz Titanite

7 IMA Minerals at location:

Actinolite ()*	Albite ()*	Calcite ()*	Epidote ()*	Lawsonite ()*
Quartz ()*	Titanite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	84.7	63.5	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	84.7	63.5	8803
Calcite ()*	Calcite	Ca(CO₃)	84.7	63.5	27770
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	84.7	63.5	8173
Lawsonite ()*	Lawsonite	CaAl₂(Si₂O₇)(OH)₂·H₂O	84.7	63.5	121
Quartz ()*	Quartz	SiO₂	84.7	63.5	61156
Titanite ()*	Titanite	CaTi(SiO₄)O	84.7	63.5	4899

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...