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:
Allard Tunnel Occurrence (Audrey Nos. 1-2; Protection; Ruby Nos. 1-95; Shorty Nos. 1-4; Jane Nos. 1-4; Minnie), La Plata District (California District), La Plata Co., Colorado, USA

Oldest recorded age at locality: 70
Youngest recorded age at locality: 65

mindat Locality ID: 114858
mindat URL: http://www.mindat.org/loc-114858.html

Tectonic Settings:

Total number of sublocalities beneath "Allard Tunnel Occurrence (Audrey Nos. 1-2; Protection; Ruby Nos. 1-95; Shorty Nos. 1-4; Jane Nos. 1-4; Minnie), La Plata District (California District), La Plata Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 37°24'23"N
Longitude: 108°5'18"W
Decimal Degree (lat, lon): 37.406388888889,-108.08833333333

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	Arsenopyrite	Calcite	Chalcopyrite	Clay	Copper	Corundum	Domeykite	Enargite	Fluorite
Kaolinite	Malachite	Marcasite	Mica	None	Not in a structural group	Pyrite	Pyroxene	Quartz	Rocksalt
Sphalerite	Spinel	Tetrahedrite	Wurtzite

Arsenopyrite ()*	Augite ()*	Azurite ()*	Bornite ()*	Calcite ()*
Chalcocite ()*	Chalcopyrite ()*	Chrysocolla ()*	Copper ()*	Domeykite ()*
Enargite ()*	Fluorite ()*	Galena ()*	Hematite ()*	Kaolinite ()*
Magnetite ()*	Malachite ()*	Marcasite ()*	Muscovite ()*	Pyrite ()*
Quartz ()*	Sphalerite ()*	Tennantite-(Fe) ()*	Torbernite ()*	Uraninite ()*

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 C Ca Cu F Fe H K Mg O P Pb S Si U Zn

Elements from minerals reported directly at this locality: Al As C Ca Cu F Fe H K Mg O P Pb S Si U Zn

Structural Groups for minerals in this locality:
Allophane Arsenopyrite Calcite Chalcopyrite Clay Copper Corundum Domeykite Enargite Fluorite
Kaolinite Malachite Marcasite Mica None Not in a structural group Pyrite Pyroxene Quartz Rocksalt
Sphalerite Spinel Tetrahedrite Wurtzite

25 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	70	65	9052
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	70	65	2060
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	70	65	5509
Bornite ()*	None	Cu₅FeS₄	70	65	5516
Calcite ()*	Calcite	Ca(CO₃)	70	65	27770
Chalcocite ()*	None	Cu₂S	70	65	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	70	65	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	70	65	3531
Copper ()*	Copper	Cu	70	65	3846
Domeykite ()*	Domeykite	Cu₃As	70	65	73
Enargite ()*	Enargite Wurtzite	Cu₃AsS₄	70	65	910
Fluorite ()*	Fluorite	CaF₂	70	65	9617
Galena ()*	Rocksalt	PbS	70	65	24243
Hematite ()*	Corundum	Fe₂O₃	70	65	14640
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	70	65	5591
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	70	65	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	70	65	12537
Marcasite ()*	Marcasite	FeS₂	70	65	5674
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	70	65	17380
Pyrite ()*	Pyrite	FeS₂	70	65	39462
Quartz ()*	Quartz	SiO₂	70	65	61156
Sphalerite ()*	Sphalerite	ZnS	70	65	21482
Tennantite-(Fe) ()*	Tetrahedrite	Cu₆(Cu₄Fe₂)As₄S₁₃	70	65	1803
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	70	65	1059
Uraninite ()*	Fluorite	UO₂	70	65	2718

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-00139	70	65	70–65									Arsenopyrite, Bornite, Calcite, Chalcocite, Chalcopyrite, Enargite, Fluorite, Galena, Hematite, Kaolinite, Magnetite, Marcasite, Pyrite, Sphalerite, Domeykite	Cu	114858	Allard Tunnel Occurrence (Audrey Nos. 1-2; Protection; Ruby Nos. 1-95; Shorty Nos. 1-4; Jane Nos. 1-4; Minnie), La Plata District (California District), La Plata Co., Colorado, USA	Allard	Singer et al. (2008)		USGSOFR2008_1155

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...