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:
Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA

Oldest recorded age at locality: 93.4
Youngest recorded age at locality: 91.5

mindat Locality ID: 107448
mindat URL: http://www.mindat.org/loc-107448.html

Tectonic Settings:

Total number of sublocalities beneath "Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 64°59'57"N
Longitude: 147°20'11"W
Decimal Degree (lat, lon): 64.999166666667,-147.33638888889

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.

Arsenic	Arsenopyrite	Calcite	Clay	Copper	Feldspar	Marcasite	Mica	Molybdenite	Nickeline
None	Pyrite	Quartz	Rutile	Scheelite	Stibnite	Tetradymite

Albite ()*	Arsenopyrite ()*	Bismuth ()*	Bismuthinite ()*	Calcite ()*
Cassiterite ()*	Gold ()*	Marcasite ()*	Microcline ()*	Molybdenite ()*
Muscovite ()*	Orthoclase ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Scheelite ()*	Tetradymite ()*

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 Au Bi C Ca Fe H K Mo Na O S Si Sn Te W

Elements from minerals reported directly at this locality: Al As Au Bi C Ca Fe H K Mo Na O S Si Sn Te W

Structural Groups for minerals in this locality:
Arsenic Arsenopyrite Calcite Clay Copper Feldspar Marcasite Mica Molybdenite Nickeline
None Pyrite Quartz Rutile Scheelite Stibnite Tetradymite

17 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	93.4	91.5	8803
Arsenopyrite ()*	Arsenopyrite	FeAsS	93.4	91.5	9052
Bismuth ()*	Arsenic	Bi	93.4	91.5	1966
Bismuthinite ()*	Stibnite	Bi₂S₃	93.4	91.5	1935
Calcite ()*	Calcite	Ca(CO₃)	93.4	91.5	27770
Cassiterite ()*	Rutile	SnO₂	93.4	91.5	5171
Gold ()*	Copper	Au	93.4	91.5	30554
Marcasite ()*	Marcasite	FeS₂	93.4	91.5	5674
Microcline ()*	Feldspar	K(AlSi₃O₈)	93.4	91.5	4924
Molybdenite ()*	Molybdenite	MoS₂	93.4	91.5	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	93.4	91.5	17380
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	93.4	91.5	2349
Pyrite ()*	Pyrite	FeS₂	93.4	91.5	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	93.4	91.5	9056
Quartz ()*	Quartz	SiO₂	93.4	91.5	61156
Scheelite ()*	Scheelite	Ca(WO₄)	93.4	91.5	4894
Tetradymite ()*	Tetradymite	Bi₂Te₂S	93.4	91.5	510

6 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	Dated Mineral	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference DOI	Reference ID
Mo-00296	93.4	92.6	93.0±0.4	Re-Os	molybdenite	FK-1-1	Molybdenite	Mo	107448	Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA	Selby et al. (2002)	10.1130/0091-7613(2002)030<0791:ATOSAG>2.0.CO;2	G30_791
Mo-00297	92.7	91.7	92.2±0.5	Re-Os	molybdenite	FK-1-2	Molybdenite	Mo	107448	Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA	Selby et al. (2002)	10.1130/0091-7613(2002)030<0791:ATOSAG>2.0.CO;2	G30_791
Mo-00298	93.3	92.5	92.9±0.4	Re-Os	molybdenite	FK-2-1	Molybdenite	Mo	107448	Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA	Selby et al. (2002)	10.1130/0091-7613(2002)030<0791:ATOSAG>2.0.CO;2	G30_791
Mo-00299	93	92.2	92.6±0.4	Re-Os	molybdenite	FK-2-2	Molybdenite	Mo	107448	Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA	Selby et al. (2002)	10.1130/0091-7613(2002)030<0791:ATOSAG>2.0.CO;2	G30_791
Mo-00300	92.1	91.5	91.8±0.3	Re-Os	molybdenite	FK-2-3	Molybdenite	Mo	107448	Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA	Selby et al. (2002)	10.1130/0091-7613(2002)030<0791:ATOSAG>2.0.CO;2	G30_791
Mo-00301	93.3	92.5	92.9±0.4	Re-Os	molybdenite	FK-3	Molybdenite	Mo	107448	Fort Knox Gold Mine, Fairbanks North Star Borough, Alaska, USA	Selby et al. (2002)	10.1130/0091-7613(2002)030<0791:ATOSAG>2.0.CO;2	G30_791

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...