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:
Sitka, Alaska, USA

Oldest recorded age at locality: 230
Youngest recorded age at locality: 170

mindat Locality ID: 195045
mindat URL: http://www.mindat.org/loc-195045.html

Tectonic Settings:

Total number of sublocalities beneath "Sitka, Alaska, USA": 133
Total number of bottom-level sublocalities: 129

Number of Child Localities: 5
Child Localities:
Chicagof District
Chichagof District
Kimshan Cove (Kinshan Cove)
Kuiu Island
Stewart Mine

Latitude: 57°7'13"N
Longitude: 135°17'40"W
Decimal Degree (lat, lon): 57.120277777778,-135.29444444444

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	Baryte	Calcite	Chalcopyrite	Clinozoisite	Copper	Corundum	Covellite	Epidote	Feldspar
Fluorite	Malachite	Molybdenite	Mordenite	Natrolite	Nickeline	None	Not in a structural group	Pentlandite	Pyrite
Quartz	Rocksalt	Scheelite	Sphalerite	Spinel	Stilbite

Albite ()*	Arsenopyrite ()*	Barrerite ()*	Baryte ()*	Bornite ()*
Calcite ()*	Chalcopyrite ()*	Chromite ()*	Covellite ()*	Epidote ()*
Fluorite ()*	Galena ()*	Gold ()*	Ilmenite ()*	Laumontite ()*
Magnetite ()*	Malachite ()*	Molybdenite ()*	Mordenite ()*	Nickeline ()*
Pentlandite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Romanèchite ()*
Scheelite ()*	Scolecite ()*	Sphalerite ()*	Stilbite-Ca ()*

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 F Fe H K Mn Mo Na Ni O Pb S Si Ti W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenopyrite Baryte Calcite Chalcopyrite Clinozoisite Copper Corundum Covellite Epidote Feldspar
Fluorite Malachite Molybdenite Mordenite Natrolite Nickeline None Not in a structural group Pentlandite Pyrite
Quartz Rocksalt Scheelite Sphalerite Spinel Stilbite

29 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
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	133389	8803
Arsenopyrite ()*	Arsenopyrite	FeAsS			12	133372,133379,133380,133390,133391,133395,133399,133404,133430,133432,133435,133495	9052
Barrerite ()*	Stilbite	Na₂(Si₇Al₂)O₁₈·6H₂O			2	133499,133500	23
Baryte ()*	Baryte	Ba(SO₄)			1	133501	11547
Bornite ()*	None	Cu₅FeS₄			5	133472,133473,133474,133475,133476	5516
Calcite ()*	Calcite	Ca(CO₃)			9	133375,133394,133419,133430,133446,133457,133489,133499,133500	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			24	133377,133384,133388,133389,133395,133404,133411,133420,133426,133430,133435,133443,133445,133454,133463,133470,133472,133473,133474,133475,133476,133481,133483,133492	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	230	170	4	133377,133383,133479,133480	3902
Covellite ()*	Covellite	CuS			5	133472,133473,133474,133475,133476	4165
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			1	133466	8173
Fluorite ()*	Fluorite	CaF₂			1	133499	9617
Galena ()*	Rocksalt	PbS			7	133379,133410,133419,133430,133432,133457,133495	24243
Gold ()*	Copper	Au			40	133372,133375,133378,133380,133390,133391,133393,133394,133397,133398,133399,133407,133408,133409,133410,133412,133417,133419,133423,133427,133428,133429,133430,133431,133432,133437,133438,133440,133441,133446,133458,133461,133471,133484,133489,133491,133493,133495,133496,133497	30554
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃			1	133441	5433
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O			2	133499,133500	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			4	133389,133441,133479,133480	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			4	133388,133447,133466,133469	12537
Molybdenite ()*	Molybdenite	MoS₂			1	133470	5800
Mordenite ()*	Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆·28H₂O			1	133500	405
Nickeline ()*	Nickeline	NiAs			1	133443	633
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈			2	133389,133443	1512
Pyrite ()*	Pyrite	FeS₂			32	133372,133375,133377,133379,133380,133384,133389,133390,133391,133399,133410,133419,133421,133427,133430,133432,133435,133441,133445,133447,133454,133457,133458,133463,133465,133472,133474,133475,133476,133491,133492,133502	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			18	133372,133377,133388,133404,133411,133420,133426,133443,133447,133454,133457,133465,133472,133475,133476,133481,133483,133495	9056
Quartz ()*	Quartz	SiO₂			62	133371,133372,133373,133374,133375,133376,133378,133379,133380,133381,133382,133384,133385,133387,133390,133391,133393,133394,133395,133397,133398,133399,133404,133407,133409,133410,133411,133412,133417,133419,133420,133421,133423,133427,133428,133429,133430,133431,133432,133436,133437,133438,133440,133446,133457,133458,133461,133462,133466,133470,133472,133473,133474,133475,133476,133484,133489,133491,133492,133495,133500,133502	61156
Romanèchite ()*	None	(Ba,H₂O)₂(Mn⁴⁺,Mn³⁺)₅O₁₀			1	133501	312
Scheelite ()*	Scheelite	Ca(WO₄)			1	133420	4894
Scolecite ()*	Natrolite	Ca(Si₃Al₂)O₁₀·3H₂O			2	133499,133500	390
Sphalerite ()*	Sphalerite	ZnS			4	133430,133432,133492,133495	21482
Stilbite-Ca ()*	Stilbite	NaCa₄(Si₂₇Al₉)O₇₂·28H₂O			1	133500	268

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-00928	170	170	Permian-Jurassic (169-179 Ma 40Ar-39Ar)	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Holanada Creek	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00930	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay 1-2	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00931	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay 3	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00932	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay 4	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00933	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay 5	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00936	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay 6	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00937	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay 7-8	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00938	230	230	Triassic	Cr	199624	Red Bluff Bay Prospects, Chicagof District, Sitka, Alaska, USA	Red Bluff Bay West of 2	Moiser et al. (2012)	USGSSIR2012_5157

Sample	Source Locality	Reference URL
R050135	Kuiu Island, Sitka, Alaska, USA	https://rruff.info/R050135

All locality data graciously provided by mindat.org

All age data...