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:
Trio West Occurrence, Tok District, Southeast Fairbanks Census Area, Alaska, USA

Oldest recorded age at locality: 390
Youngest recorded age at locality: 390

mindat Locality ID: 200430
mindat URL: http://www.mindat.org/loc-200430.html

Tectonic Settings:

Total number of sublocalities beneath "Trio West Occurrence, Tok District, Southeast Fairbanks Census Area, Alaska, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 63°15'37"N
Longitude: 144°3'14"W
Decimal Degree (lat, lon): 63.260277777778,-144.05388888889

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	Arsenopyrite	Chalcopyrite	Copper	Nickeline	None	Pyrite	Rocksalt	Sphalerite	Spinel

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: As Au Ca Cu Fe H Mg O Pb S Si Zn

Elements from minerals reported directly at this locality: As Au Ca Cu Fe H Mg O Pb S Si Zn

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

9 IMA Minerals at location:

Actinolite ()*	Arsenopyrite ()*	Chalcopyrite ()*	Galena ()*	Gold ()*
Magnetite ()*	Pyrite ()*	Pyrrhotite ()*	Sphalerite ()*

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	390	390	3419
Arsenopyrite ()*	Arsenopyrite	FeAsS	390	390	9052
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	390	390	27198
Galena ()*	Rocksalt	PbS	390	390	24243
Gold ()*	Copper	Au	390	390	30554
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	390	390	14899
Pyrite ()*	Pyrite	FeS₂	390	390	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	390	390	9056
Sphalerite ()*	Sphalerite	ZnS	390	390	21482

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	vms-01006	390	390	Devonian							Yes			S	200428	Trio Occurrence, Tok District, Southeast Fairbanks Census Area, Alaska, USA	Trio	Moiser et al. (2009)		USGSOFR2009_1034

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...