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:
Aleutians East Borough, Alaska, USA

Oldest recorded age at locality: 6.4
Youngest recorded age at locality: 6.4

mindat Locality ID: 47227
mindat URL: http://www.mindat.org/loc-47227.html

Tectonic Settings:

Total number of sublocalities beneath "Aleutians East Borough, Alaska, USA": 140
Total number of bottom-level sublocalities: 136

Number of Child Localities: 5
Child Localities:
Alaska Peninsula District
Aleutian Islands District
Fox Islands
Unalaska Island
Unga Island

Latitude: 54°36'55"N
Longitude: 163°23'51"W
Decimal Degree (lat, lon): 54.615277777778,-163.3975

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.

Allophane	Amorphous	Amphibole	Analcime	Arsenopyrite	Baryte	Calcite	Chalcopyrite	Clay	Clinozoisite
Copper	Corundum	Covellite	Diaspore	Epidote	Fluorite	Kaolinite	Malachite	Marcasite	Mica
Molybdenite	Mordenite	Nickeline	None	Not in a structural group	Pyrite	Quartz	Rhodonite	Rocksalt	Rutile
Smectite-vermiculite	Sphalerite	Spinel	Sulphur	Tetrahedrite

Actinolite ()*	Anhydrite ()*	Anthophyllite ()*	Arsenopyrite ()*	Baryte ()*
Calcite ()*	Chalcocite ()*	Chalcopyrite ()*	Chrysocolla ()*	Cinnabar ()*
Copper ()*	Covellite ()*	Cummingtonite ()*	Cuprite ()*	Dolomite ()*
Epidote ()*	Fluorite ()*	Franklinite ()*	Galena ()*	Goethite ()*
Gold ()*	Hematite ()*	Ilmenite ()*	Kaolinite ()*	Laumontite ()*
Magnetite ()*	Malachite ()*	Marcasite ()*	Molybdenite ()*	Montmorillonite ()*
Mordenite ()*	Muscovite ()*	Opal ()*	Pyrite ()*	Pyrrhotite ()*
Quartz ()*	Rhodochrosite ()*	Rhodonite ()*	Rutile ()*	Scorodite ()*
Sphalerite ()*	Sulphur ()*	Tetrahedrite-(Zn) ()*	Wairakite ()*	Yugawaralite ()*

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 Ba C Ca Cu F Fe H Hg K Mg Mn Mo Na O Pb S Sb Si Ti Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Amorphous Amphibole Analcime Arsenopyrite Baryte Calcite Chalcopyrite Clay Clinozoisite
Copper Corundum Covellite Diaspore Epidote Fluorite Kaolinite Malachite Marcasite Mica
Molybdenite Mordenite Nickeline None Not in a structural group Pyrite Quartz Rhodonite Rocksalt Rutile
Smectite-vermiculite Sphalerite Spinel Sulphur Tetrahedrite

45 IMA Minerals at location:

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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂			1	128834	3419
Anhydrite ()*	Not in a structural group	Ca(SO₄)			1	128834	1588
Anthophyllite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂			1	128834	718
Arsenopyrite ()*	Arsenopyrite	FeAsS			3	128777,128805,128821	9052
Baryte ()*	Baryte	Ba(SO₄)			6	128732,128736,128770,128805,128821,128826	11547
Calcite ()*	Calcite	Ca(CO₃)			14	128714,128718,128722,128750,128769,128777,128778,128800,128805,128806,128807,128821,128829,128834	27770
Chalcocite ()*	None	Cu₂S	6.4	6.4	3	128771,128822,128828	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	6.4	6.4	21	128699,128704,128705,128710,128718,128720,128729,128734,128735,128750,128769,128771,128778,128802,128809,128810,128812,128821,128822,128828,128836	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	6.4	6.4	1	128771	3531
Cinnabar ()*	None	HgS			1	128700	2600
Copper ()*	Copper	Cu			1	128836	3846
Covellite ()*	Covellite	CuS	6.4	6.4	1	128771	4165
Cummingtonite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂			1	128834	327
Cuprite ()*	Not in a structural group	Cu₂O	6.4	6.4	1	128771	2970
Dolomite ()*	None	CaMg(CO₃)₂			1	128748	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	6.4	6.4	2	128771,128834	8173
Fluorite ()*	Fluorite	CaF₂	6.4	6.4	1	128771	9617
Franklinite ()*	Spinel	ZnFe³⁺₂O₄			1	128727	52
Galena ()*	Rocksalt	PbS			19	128698,128699,128704,128705,128718,128720,128732,128734,128735,128750,128777,128778,128800,128802,128805,128810,128821,128826,128836	24243
Goethite ()*	Diaspore	FeO(OH)	6.4	6.4	1	128771	7437
Gold ()*	Copper	Au			30	128698,128699,128700,128701,128704,128705,128709,128718,128720,128732,128733,128736,128750,128769,128770,128772,128775,128777,128778,128779,128780,128781,128800,128801,128805,128820,128821,128823,128829,128836	30554
Hematite ()*	Corundum	Fe₂O₃	6.4	6.4	1	128771	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃			3	128728,128731,128791	5433
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	6.4	6.4	1	128771	5591
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O			1	128834	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	6.4	6.4	8	128727,128728,128731,128771,128791,128794,128821,128834	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	128828	12537
Marcasite ()*	Marcasite	FeS₂			1	128775	5674
Molybdenite ()*	Molybdenite	MoS₂	6.4	6.4	3	128771,128821,128822	5800
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O			1	128834	1508
Mordenite ()*	Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆·28H₂O			1	128834	405
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	6.4	6.4	2	128771,128834	17380
Opal ()*	Amorphous	SiO₂·nH₂O			2	128714,128814	2994
Pyrite ()*	Pyrite	FeS₂	6.4	6.4	80	128698,128699,128700,128701,128702,128705,128706,128707,128708,128709,128710,128711,128714,128717,128718,128719,128720,128721,128722,128723,128726,128729,128730,128732,128734,128735,128736,128737,128739,128745,128747,128748,128750,128753,128757,128765,128769,128770,128771,128772,128774,128775,128776,128777,128778,128779,128780,128781,128782,128785,128788,128789,128790,128794,128795,128796,128797,128798,128802,128803,128805,128807,128808,128809,128811,128812,128814,128820,128821,128822,128823,128824,128825,128826,128828,128829,128830,128831,128834,128836	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			2	128785,128808	9056
Quartz ()*	Quartz	SiO₂	6.4	6.4	52	128698,128699,128701,128703,128704,128705,128708,128709,128711,128712,128713,128714,128715,128717,128718,128719,128720,128721,128722,128723,128725,128726,128732,128734,128735,128736,128737,128747,128748,128750,128753,128759,128769,128770,128771,128772,128773,128775,128777,128778,128779,128780,128781,128782,128805,128809,128821,128822,128826,128828,128829,128834	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)	6.4	6.4	1	128771	1711
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)			1	128826	969
Rutile ()*	Rutile	TiO₂	6.4	6.4	1	128771	5614
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O			1	128826	1153
Sphalerite ()*	Sphalerite	ZnS			20	128698,128699,128704,128705,128714,128718,128720,128732,128734,128735,128750,128777,128778,128802,128805,128810,128821,128826,128834,128836	21482
Sulphur ()*	Sulphur	S			3	128799,128814,128831	2045
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			5	128720,128736,128750,128821,128826	5317
Wairakite ()*	Analcime	Ca(Si₄Al₂)O₁₂·2H₂O			1	128834	73
Yugawaralite ()*	None	Ca(Si₆Al₂)O₁₆·4H₂O			1	128834	33

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
	PorphCu-00241	6.4	6.4	6.4									Chalcocite, Chalcopyrite, Chrysocolla, Covellite, Cuprite, Epidote, Fluorite, Hematite, Kaolinite, Magnetite, Molybdenite, Pyrite, Rhodochrosite, Rutile	Cu	199526	Pyramid Prospect, Alaska Peninsula District, Aleutians East Borough, Alaska, USA	Pyramid	Singer et al. (2008)		USGSOFR2008_1155

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...