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:
Annaka City, Gunma, Japan

mindat Locality ID: 212616
mindat URL: http://www.mindat.org/loc-212616.html

Tectonic Settings:

Total number of sublocalities beneath "Annaka City, Gunma, Japan": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Myogi Mine
Usui Pass

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.

Clay	Garnet	Mordenite	Natrolite	None	Not in a structural group	Smectite-vermiculite

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 Mg Na O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Clay Garnet Mordenite Natrolite None Not in a structural group Smectite-vermiculite

6 IMA Minerals at location:

Andradite ()*	Epistilbite ()*	Grossular ()*	Laumontite ()*	Montmorillonite ()*
Scolecite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	1	74531	1534
Epistilbite ()*	Mordenite	Ca₃[Si₁₈Al₆O₄₈]·16H₂O	1	74531	138
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃	1	74531	1544
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	1	74531	1271
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	1	74530	1508
Scolecite ()*	Natrolite	Ca(Si₃Al₂)O₁₀·3H₂O	1	74531	390

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...