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:
Fortymile District, Bethel Census Area, Alaska, USA

mindat Locality ID: 283639
mindat URL: http://www.mindat.org/loc-283639.html

Tectonic Settings:

Total number of sublocalities beneath "Fortymile District, Bethel Census Area, Alaska, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Lead Creek Prospect

Latitude: 58°57'36"N
Longitude: 161°39'6"W
Decimal Degree (lat, lon): 58.96,-161.65166666667

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	Chalcopyrite	None	Pyrite	Quartz	Rocksalt	Sphalerite	Wollastonite

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 C Ca Cu Fe H Mg O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Chalcopyrite None Pyrite Quartz Rocksalt Sphalerite Wollastonite

10 IMA Minerals at location:

Ankerite ()*	Chalcopyrite ()*	Dolomite ()*	Galena ()*	Pyrite ()*
Quartz ()*	Scorodite ()*	Siderite ()*	Sphalerite ()*	Wollastonite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	1	129087	3092
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1	129087	27198
Dolomite ()*	None	CaMg(CO₃)₂	1	129087	9895
Galena ()*	Rocksalt	PbS	1	129087	24243
Pyrite ()*	Pyrite	FeS₂	1	129087	39462
Quartz ()*	Quartz	SiO₂	1	129087	61156
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O	1	129087	1153
Siderite ()*	Calcite	Fe(CO₃)	1	129087	6417
Sphalerite ()*	Sphalerite	ZnS	1	129087	21482
Wollastonite ()*	Wollastonite	CaSiO₃	1	129087	1247

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...