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:
Tomichi District, Gunnison Co., Colorado, USA

Oldest recorded age at locality: 40
Youngest recorded age at locality: 26

mindat Locality ID: 49905
mindat URL: http://www.mindat.org/loc-49905.html

Tectonic Settings:

Total number of sublocalities beneath "Tomichi District, Gunnison Co., Colorado, USA": 61
Total number of bottom-level sublocalities: 61

Number of Child Localities: 61
Child Localities:
Akron Victor Morning Star Mines
Alpine Tunnell Old
Annie Hudson
Ben Bolt
Big Red No. 22
Big Red No. 39
Bill Short
Breadwinner Occurrence
Brittle Basin
Brittle Silver Occurrence
Congress Tunnel Occurrence
Copper Hill Occurrence (Clover Mtn.)
David H Shaft
Day Star Occurrence
Defiance
Denver City Tunnel
Ensign Tunnel
Erie Mine (Eureka)
Erie Tunnel
Eureka - Nest Egg
Fort Scott (Oddie; Moore; D. A. Mason Occurrence)
Hiawatha Occurrence
High Mucka Muck; Jas. G. Blaine
Hot Springs Valley Placers (MRDS - 10016372)
Iron King
Isabel Occurrence
Kentucky Belle - Baby Gerald Mine
Legal Tender Occurrence
Lewiston - Pet
Lilly
Little Maud; Clinton; Silver Gem; Eastman; San Juan; Uncle Sam Occurrence
Magna Charta Tunnel Occurrence
Maid Of Erin (Silver Pick)
Margo Claim Group (Vickie-Lee; Delores-Marie)
Mazeppa; May (Akron)
Morning Glim
Morning Star Occurrence
N.B.C. Occurrence
North Star Mine
Parole Tunnel (Spar Copper Mine; Contact Mountain)
Princeton And Blackhawk Mine
Princeton Tunnel Occurrence
Silver Cord
Silver Dollar (Alice)
South Quartz Creek
Stella Mountain
Tenderfoot
Tomichi
Tomichi Dome
Unknown Clay - Fire (Refractory) Occurrence (MRDS - 10016373)
Unknown Fluorine-Fluorite Occurrence (MRDS - 10016411)
Unknown Iron - Gold - Zinc - Silver - Lead Occurrence (MRDS - 10016420)
Unknown Molybdenum Occurrence (MRDS - 10016421)
Unknown Perlite Occurrence (MRDS - 10016423)
Unknown Silver - Zinc - Lead - Gold (MRDS - 10108084)
Unknown Zinc - Silver - Copper - Lead Occurrence (MRDS - 10016427)
Unnamed Bog Iron Deposit
Victor; Morning Star; David H.
Wand A Incline
West Point
White Pine

Latitude: 38°33'33"N
Longitude: 106°23'22"W
Decimal Degree (lat, lon): 38.559166666667,-106.38944444444

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.

Acanthite	Allophane	Amphibole	Aragonite	Arsenopyrite	Autunite	Baryte	Calcite	Chalcopyrite	Clay
Clinozoisite	Columbite	Copper	Corundum	Enargite	Epidote	Fluorite	Kaolinite	Malachite	Mica
Molybdenite	None	Not in a structural group	Pyrite	Pyroxene	Quartz	Rocksalt	Sphalerite	Spinel	Tetrahedrite
Topaz	Wurtzite	Zircon

Acanthite ()*	Actinolite ()*	Anglesite ()*	Aragonite ()*	Arsenopyrite ()*
Autunite ()*	Azurite ()*	Baryte ()*	Calcite ()*	Cerussite ()*
Chalcocite ()*	Chalcopyrite ()*	Chlorargyrite ()*	Chrysocolla ()*	Copper ()*
Cuprite ()*	Diopside ()*	Dolomite ()*	Enargite ()*	Epidote ()*
Euxenite-(Y) ()*	Fluorite ()*	Gahnite ()*	Galena ()*	Gold ()*
Greenockite ()*	Hematite ()*	Hemimorphite ()*	Kaolinite ()*	Magnetite ()*
Malachite ()*	Molybdenite ()*	Muscovite ()*	Parsonsite ()*	Phlogopite ()*
Polycrase-(Y) ()*	Pyrite ()*	Quartz ()*	Siderite ()*	Silver ()*
Smithsonite ()*	Sphalerite ()*	Stephanite ()*	Tennantite-(Fe) ()*	Tetrahedrite-(Zn) ()*
Topaz ()*	Torbernite ()*	Tremolite ()*	Uraninite ()*	Xenotime-(Y) ()*
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: Ag Al As Au Ba C Ca Cd Ce Cl Cu F Fe H K Mg Mo Nb O P Pb S Sb Si Ta Th Ti U Y Zn Zr

Elements from minerals reported directly at this locality: Ag Cl S

Structural Groups for minerals in this locality:
Acanthite Allophane Amphibole Aragonite Arsenopyrite Autunite Baryte Calcite Chalcopyrite Clay
Clinozoisite Columbite Copper Corundum Enargite Epidote Fluorite Kaolinite Malachite Mica
Molybdenite None Not in a structural group Pyrite Pyroxene Quartz Rocksalt Sphalerite Spinel Tetrahedrite
Topaz Wurtzite Zircon

51 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
Acanthite ()*	Acanthite	Ag₂S	40	26	0		2793
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂			1	190055	3419
Anglesite ()*	Baryte	Pb(SO₄)			2	190050,190058	2734
Aragonite ()*	Aragonite	Ca(CO₃)			1	190063	3250
Arsenopyrite ()*	Arsenopyrite	FeAsS			1	190046	9052
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O			2	190035,190036	1272
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			3	190055,190069,190088	5509
Baryte ()*	Baryte	Ba(SO₄)			3	190037,190060,190073	11547
Calcite ()*	Calcite	Ca(CO₃)			9	190031,190041,190043,190044,190048,190055,190062,190069,190090	27770
Cerussite ()*	Aragonite	Pb(CO₃)			10	190031,190038,190043,190046,190050,190056,190058,190067,190069,190088	4979
Chalcocite ()*	None	Cu₂S			1	190072	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			20	190031,190034,190037,190041,190044,190048,190049,190050,190058,190059,190060,190062,190067,190069,190070,190073,190074,190085,190088,190090	27198
Chlorargyrite ()*	Rocksalt	AgCl	40	26	0		1382
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O			1	190069	3531
Copper ()*	Copper	Cu			6	190050,190060,190063,190066,190070,190086	3846
Cuprite ()*	Not in a structural group	Cu₂O			1	190055	2970
Diopside ()*	Pyroxene	CaMgSi₂O₆			3	190041,190048,190090	4135
Dolomite ()*	None	CaMg(CO₃)₂			10	190031,190041,190043,190056,190063,190069,190077,190085,190089,190090	9895
Enargite ()*	Enargite Wurtzite	Cu₃AsS₄			1	190070	910
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			5	190041,190048,190050,190055,190090	8173
Euxenite-(Y) ()*	Columbite	Y(NbTi)O₆			1	190064	414
Fluorite ()*	Fluorite	CaF₂			1	190044	9617
Gahnite ()*	Spinel	ZnAl₂O₄			1	190046	445
Galena ()*	Rocksalt	PbS			22	190031,190033,190034,190037,190038,190041,190043,190048,190049,190050,190052,190056,190058,190060,190062,190067,190069,190072,190073,190074,190088,190090	24243
Gold ()*	Copper	Au			14	190040,190049,190050,190051,190054,190059,190060,190063,190065,190066,190068,190070,190082,190089	30554
Greenockite ()*	Wurtzite	CdS			1	190037	717
Hematite ()*	Corundum	Fe₂O₃			1	190033	14640
Hemimorphite ()*	Not in a structural group	Zn₄(Si₂O₇)(OH)₂·H₂O			6	190033,190038,190043,190058,190063,190088	1689
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			1	190055	5591
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	40	26	5	190033,190048,190055,190076,190079	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			6	190042,190046,190055,190058,190069,190088	12537
Molybdenite ()*	Molybdenite	MoS₂			2	190042,190083	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			1	190090	17380
Parsonsite ()*	None	Pb₂(UO₂)(PO₄)₂			2	190035,190036	63
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂			1	190090	2273
Polycrase-(Y) ()*	Columbite	Y(Ti,Nb)₂(O,OH)₆			1	190064	121
Pyrite ()*	Pyrite	FeS₂			23	190031,190034,190037,190041,190044,190045,190048,190050,190051,190052,190055,190058,190059,190060,190062,190067,190069,190070,190072,190073,190074,190088,190090	39462
Quartz ()*	Quartz	SiO₂			25	190031,190033,190034,190037,190038,190044,190045,190046,190048,190050,190051,190052,190055,190056,190058,190059,190060,190062,190063,190067,190070,190072,190073,190074,190088	61156
Siderite ()*	Calcite	Fe(CO₃)			1	190055	6417
Silver ()*	Copper	Ag			17	190031,190033,190040,190044,190049,190050,190051,190053,190059,190063,190065,190066,190068,190070,190082,190086,190089	5186
Smithsonite ()*	Calcite	Zn(CO₃)			7	190033,190038,190043,190046,190063,190069,190088	2473
Sphalerite ()*	Sphalerite	ZnS			19	190031,190034,190037,190041,190045,190048,190049,190050,190052,190058,190059,190062,190067,190069,190070,190074,190085,190088,190090	21482
Stephanite ()*	None	Ag₅SbS₄			2	190043,190044	586
Tennantite-(Fe) ()*	Tetrahedrite	Cu₆(Cu₄Fe₂)As₄S₁₃			1	190088	1803
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			6	190031,190043,190059,190060,190062,190070	5317
Topaz ()*	Topaz	Al₂SiO₄F₂	40	26	1	190079	1476
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O			2	190035,190036	1059
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂			3	190033,190043,190055	2562
Uraninite ()*	Fluorite	UO₂			1	190064	2718
Xenotime-(Y) ()*	Zircon	Y(PO₄)			1	190064	939
Zircon ()*	Zircon	Zr(SiO₄)			1	190064	5251

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
	NAVDAT-36553	40	26	33±7					36553						159276	Tomichi Dome, Tomichi District, Gunnison Co., Colorado, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...