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:
Ear Mountain, York Range, Seward Peninsula, Nome Census Area, Alaska, USA

Oldest recorded age at locality: 74.7
Youngest recorded age at locality: 71.5

mindat Locality ID: 69237
mindat URL: http://www.mindat.org/loc-69237.html

Tectonic Settings:

Total number of sublocalities beneath "Ear Mountain, York Range, Seward Peninsula, Nome Census Area, Alaska, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 65°55'0"N
Longitude: 166°15'"W
Decimal Degree (lat, lon): 65.916666666667,-166.25

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	Corundum	Dumortierite	Fluorite	Hulsite	Ludwigite	Nickeline	None	Pyrite	Quartz
Rutile	Spinel	Zircon

Arsenopyrite ()*	Cassiterite ()*	Dumortierite ()*	Fluorite ()*	Hulsite ()*
Ilmenite ()*	Ludwigite ()*	Magnetite ()*	Nordenskiöldine ()*	Pyrite ()*
Pyrrhotite ()*	Quartz ()*	Rutile ()*	Vonsenite ()*	Zircon ()*

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 As B Ca F Fe Mg O S Si Sn Ti Zr

Elements from minerals reported directly at this locality: Al As B Ca F Fe Mg O S Si Sn Ti Zr

Structural Groups for minerals in this locality:
Arsenopyrite Corundum Dumortierite Fluorite Hulsite Ludwigite Nickeline None Pyrite Quartz
Rutile Spinel Zircon

15 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	74.7	71.5	9052
Cassiterite ()*	Rutile	SnO₂	74.7	71.5	5171
Dumortierite ()*	Dumortierite	AlAl₆BSi₃O₁₈	74.7	71.5	231
Fluorite ()*	Fluorite	CaF₂	74.7	71.5	9617
Hulsite ()*	Hulsite	Fe²⁺₂Fe³⁺O₂(BO₃)	74.7	71.5	15
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	74.7	71.5	5433
Ludwigite ()*	Ludwigite	Mg₂Fe³⁺O₂(BO₃)	74.7	71.5	134
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	74.7	71.5	14899
Nordenskiöldine ()*	None	CaSn(BO₃)₂	74.7	71.5	16
Pyrite ()*	Pyrite	FeS₂	74.7	71.5	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	74.7	71.5	9056
Quartz ()*	Quartz	SiO₂	74.7	71.5	61156
Rutile ()*	Rutile	TiO₂	74.7	71.5	5614
Vonsenite ()*	Ludwigite	Fe²⁺₂Fe³⁺O₂(BO₃)	74.7	71.5	62
Zircon ()*	Zircon	Zr(SiO₄)	74.7	71.5	5251

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-Rb-Sr-05533	74.7	71.5	73.1±1.6	Rb-Sr	age of intrusion	whole rock	69237	Ear Mountain, York Range, Seward Peninsula, Nome Census Area, Alaska, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-05534	74.7	71.5	73.1±1.6	Rb-Sr	age of intrusion	whole rock	69237	Ear Mountain, York Range, Seward Peninsula, Nome Census Area, Alaska, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-05535	74.7	71.5	73.1±1.6	Rb-Sr	age of intrusion	whole rock	69237	Ear Mountain, York Range, Seward Peninsula, Nome Census Area, Alaska, USA	USGS-Rb-Sr	USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...