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:
May Day Mine, La Plata District (California District), La Plata Co., Colorado, USA

mindat Locality ID: 19772
mindat URL: http://www.mindat.org/loc-19772.html

Tectonic Settings:

Total number of sublocalities beneath "May Day Mine, La Plata District (California District), La Plata Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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.

Aragonite	Baryte	Calcite	Chalcopyrite	Melonite	None	Not in a structural group	Pyrite	Quartz	Rocksalt
Sphalerite	Tetrahedrite

Altaite ()*	Aragonite ()*	Baryte ()*	Bohdanowiczite ()*	Bromargyrite ()*
Calaverite ()*	Calcite ()*	Cerussite ()*	Chalcopyrite ()*	Chlorargyrite ()*
Galena ()*	Goldfieldite ()*	Hemimorphite ()*	Hessite ()*	Krennerite ()*
Petzite ()*	Pyrite ()*	Quartz ()*	Sphalerite ()*	Stützite ()*
Sylvanite ()*	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: Ag Au Ba Bi Br C Ca Cl Cu Fe H O Pb S Sb Se Si Te Zn

Elements from minerals reported directly at this locality: Ag Au Ba Bi Br C Ca Cl Cu Fe H O Pb S Sb Se Si Te Zn

Structural Groups for minerals in this locality:
Aragonite Baryte Calcite Chalcopyrite Melonite None Not in a structural group Pyrite Quartz Rocksalt
Sphalerite Tetrahedrite

22 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of localities containing mineral
Altaite ()*	Rocksalt	PbTe	489
Aragonite ()*	Aragonite	Ca(CO₃)	3250
Baryte ()*	Baryte	Ba(SO₄)	11547
Bohdanowiczite ()*	None	AgBiSe₂	41
Bromargyrite ()*	Rocksalt	AgBr	227
Calaverite ()*	Melonite	AuTe₂	361
Calcite ()*	Calcite	Ca(CO₃)	27770
Cerussite ()*	Aragonite	Pb(CO₃)	4979
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	27198
Chlorargyrite ()*	Rocksalt	AgCl	1382
Galena ()*	Rocksalt	PbS	24243
Goldfieldite ()*	Tetrahedrite	(Cu₄ ₂)Cu₆Te₄S₁₃	72
Hemimorphite ()*	Not in a structural group	Zn₄(Si₂O₇)(OH)₂·H₂O	1689
Hessite ()*	None	Ag₂Te	804
Krennerite ()*	None	Au₃AgTe₈	111
Petzite ()*	None	Ag₃AuTe₂	409
Pyrite ()*	Pyrite	FeS₂	39462
Quartz ()*	Quartz	SiO₂	61156
Sphalerite ()*	Sphalerite	ZnS	21482
Stützite ()*	None	Ag_5-xTe₃ (x = 0.24-0.36)	92
Sylvanite ()*	Melonite	AgAuTe₄	337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	5317

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...