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:
Anchorage District, Anchorage, Alaska, USA

Oldest recorded age at locality: 164
Youngest recorded age at locality: 164

mindat Locality ID: 203054
mindat URL: http://www.mindat.org/loc-203054.html

Tectonic Settings:

Total number of sublocalities beneath "Anchorage District, Anchorage, Alaska, USA": 19
Total number of bottom-level sublocalities: 19

Number of Child Localities: 19
Child Localities:
Bird Creek Prospect
California Creek Mine
Crow Creek (Erickson; Holmgren-Erickson Property; Crow Creek Mining Co.; Girdwood Property; Girdwood Mining Co. Mine)
Crow Creek; Erickson Mine; Crow Creek Mine Mine
Eagle River; Mayflower Prospect
Girdwood
Kern Creek Prospect
Mount Eklutna Occurrence
Myers Occurrence
Peters Creek; Jessie B. Prospect
Rainbow Creek Prospect
Raven Creek Prospect
Strong; Indian Prospect
Summit Mountain Prospect
Thunderbird Creek Occurrence
Twentymile River Occurrence
Unnamed Prospect (ARDF - AN106; On Raggedtop Mountain)
West Twin Peak; West Ridge; Eklutna Creek Occurrence
Winner Creek Mine

Latitude: 61°6'40"N
Longitude: 149°12'34"W
Decimal Degree (lat, lon): 61.111111111111,-149.20944444444

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.

Arsenopyrite	Calcite	Chalcopyrite	Copper	Malachite	None	Pyrite	Quartz	Rocksalt	Scheelite
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 C Ca Cr Cu Fe H O Pb S Si W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenopyrite Calcite Chalcopyrite Copper Malachite None Pyrite Quartz Rocksalt Scheelite
Sphalerite Spinel

11 IMA Minerals at location:

Arsenopyrite ()*	Calcite ()*	Chalcopyrite ()*	Chromite ()*	Galena ()*
Gold ()*	Malachite ()*	Pyrite ()*	Quartz ()*	Scheelite ()*
Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS			3	128905,128907,128911	9052
Calcite ()*	Calcite	Ca(CO₃)			3	128907,128911,128915	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			4	128907,128909,128911,128912	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	164	164	4	128910,128912,128917,128920	3902
Galena ()*	Rocksalt	PbS			4	128907,128911,128912,128919	24243
Gold ()*	Copper	Au			13	128903,128904,128905,128906,128907,128909,128912,128913,128914,128915,128916,128918,128921	30554
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	128907	12537
Pyrite ()*	Pyrite	FeS₂			6	128905,128907,128909,128912,128915,128919	39462
Quartz ()*	Quartz	SiO₂			6	128905,128907,128912,128915,128916,128919	61156
Scheelite ()*	Scheelite	Ca(WO₄)			1	128904	4894
Sphalerite ()*	Sphalerite	ZnS			2	128907,128911	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
	podchrome-00889	164	164	Jurassic										Cr	202878	West Twin Peak; West Ridge; Eklutna Creek Occurrence, Anchorage District, Anchorage, Alaska, USA	Eklutna 37	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...