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:
Kupreanof Island, Petersburg Borough, Alaska, USA

mindat Locality ID: 47271
mindat URL: http://www.mindat.org/loc-47271.html

Tectonic Settings:

Total number of sublocalities beneath "Kupreanof Island, Petersburg Borough, Alaska, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Irish Creek
Islets

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.

Calcite	Mordenite	None	Not in a structural group	Quartz	Stilbite

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 H K Na O Si

Elements from minerals reported directly at this locality: Al H Na O Si

Structural Groups for minerals in this locality:
Calcite Mordenite None Not in a structural group Quartz Stilbite

7 IMA Minerals at location:

Barrerite ()*	Calcite ()*	Epistilbite ()*	Laumontite ()*	Mordenite ()*
Quartz ()*	Stilbite-Na ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Barrerite ()*	Stilbite	Na₂(Si₇Al₂)O₁₈·6H₂O	0		23
Calcite ()*	Calcite	Ca(CO₃)	1	132792	27770
Epistilbite ()*	Mordenite	Ca₃[Si₁₈Al₆O₄₈]·16H₂O	1	132792	138
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	1	132792	1271
Mordenite ()*	Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆·28H₂O	2	132791,132792	405
Quartz ()*	Quartz	SiO₂	2	132791,132792	61156
Stilbite-Na ()*	Stilbite	Na₉(Si₂₇Al₉)O₇₂·28H₂O	1	132792	15

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...