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:
Kodiak Island Borough, Alaska, USA

Oldest recorded age at locality: 135
Youngest recorded age at locality: 135

mindat Locality ID: 203086
mindat URL: http://www.mindat.org/loc-203086.html

Tectonic Settings:

Total number of sublocalities beneath "Kodiak Island Borough, Alaska, USA": 73
Total number of bottom-level sublocalities: 70

Number of Child Localities: 3
Child Localities:
Alaska Peninsula District
Bristol Bay District
Kodiak District

Latitude: 57°43'45"N
Longitude: 154°52'6"W
Decimal Degree (lat, lon): 57.729166666667,-154.86833333333

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.

Amorphous	Arsenopyrite	Baryte	Calcite	Chalcopyrite	Clay	Copper	Mica	Molybdenite	Nickeline
None	Pyrite	Quartz	Rocksalt	Scheelite	Sphalerite	Spinel	Stibnite	Tetrahedrite

Arsenopyrite ()*	Baryte ()*	Bornite ()*	Calcite ()*	Chalcopyrite ()*
Chromite ()*	Galena ()*	Gold ()*	Jordisite ()*	Magnetite ()*
Molybdenite ()*	Muscovite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Scheelite ()*	Sphalerite ()*	Stibnite ()*	Tetrahedrite-(Zn) ()*

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 Cr Cu Fe H K Mo O Pb S Sb Si W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Arsenopyrite Baryte Calcite Chalcopyrite Clay Copper Mica Molybdenite Nickeline
None Pyrite Quartz Rocksalt Scheelite Sphalerite Spinel Stibnite Tetrahedrite

19 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
Arsenopyrite ()*	Arsenopyrite	FeAsS			10	130826,130828,130829,130831,130833,130834,130853,130869,130870,130874	9052
Baryte ()*	Baryte	Ba(SO₄)			1	130810	11547
Bornite ()*	None	Cu₅FeS₄			1	130852	5516
Calcite ()*	Calcite	Ca(CO₃)			2	130859,130863	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			12	130805,130820,130831,130833,130839,130840,130852,130858,130859,130863,130869,130874	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	135	135	18	130836,130837,130838,130839,130841,130842,130843,130844,130845,130846,130847,130848,130849,130850,130851,130856,130861,130865	3902
Galena ()*	Rocksalt	PbS			6	130803,130814,130829,130859,130863,130874	24243
Gold ()*	Copper	Au			31	130803,130804,130807,130811,130814,130816,130818,130824,130825,130826,130827,130828,130829,130830,130832,130834,130835,130853,130854,130855,130859,130860,130862,130863,130864,130867,130870,130871,130872,130873,130874	30554
Jordisite ()*	Amorphous	MoS₂			1	130818	102
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			1	130814	14899
Molybdenite ()*	Molybdenite	MoS₂			2	130803,130814	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			2	130828,130863	17380
Pyrite ()*	Pyrite	FeS₂			19	130810,130814,130815,130816,130818,130821,130824,130825,130826,130828,130829,130831,130833,130834,130835,130858,130859,130863,130874	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			9	130828,130835,130839,130840,130852,130858,130863,130869,130874	9056
Quartz ()*	Quartz	SiO₂			24	130803,130814,130815,130816,130818,130821,130824,130825,130826,130827,130828,130829,130834,130835,130853,130854,130855,130859,130863,130869,130870,130871,130873,130874	61156
Scheelite ()*	Scheelite	Ca(WO₄)			2	130831,130833	4894
Sphalerite ()*	Sphalerite	ZnS			3	130810,130821,130874	21482
Stibnite ()*	Stibnite	Sb₂S₃			3	130803,130814,130874	3418
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			1	130814	5317

8 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
podchrome-00918	135	135	Late Jurassic-Cretaceous	Cr	197880	Halibut Bay 41 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 41	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00919	135	135	Late Jurassic-Cretaceous	Cr	197882	Halibut Bay 43 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 43	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00920	135	135	Late Jurassic-Cretaceous	Cr	197883	Halibut Bay 44 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 44	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00921	135	135	Late Jurassic-Cretaceous	Cr	197884	Halibut Bay 45 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 45	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00923	135	135	Late Jurassic-Cretaceous	Cr	197885	Halibut Bay 46 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 46	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00924	135	135	Late Jurassic-Cretaceous	Cr	197887	Halibut Bay 48 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 48	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00925	135	135	Late Jurassic-Cretaceous	Cr	197889	Halibut Bay 50 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 50	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00926	135	135	Late Jurassic-Cretaceous	Cr	197890	Halibut Bay 51 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USA	Halibut Bay 51	Moiser et al. (2012)	USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...