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:
Keystone Mine, Magnolia District, Boulder Co., Colorado, USA

Oldest recorded age at locality: 65.5
Youngest recorded age at locality: 0

mindat Locality ID: 3592
mindat URL: http://www.mindat.org/loc-3592.html

Tectonic Settings:

Total number of sublocalities beneath "Keystone Mine, Magnolia District, Boulder Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°59'18"N
Longitude: 105°22'4"W
Decimal Degree (lat, lon): 39.988333333333,-105.36777777778

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.

Copper	Diaspore	Melonite	Mica	None	Pyrite	Quartz	Rutile	Sphalerite	Stibnite
Zemannite

Calaverite ()*	Coloradoite ()*	Ferrotellurite ()*	Goethite ()*	Gold ()*
Keystoneite ()*	Magnolite ()*	Melonite ()*	Mercury ()*	Paratellurite ()*
Pyrite ()*	Quartz ()*	Roscoelite ()*	Silver ()*	Stibnite ()*
Sylvanite ()*	Tellurite ()*	Tellurium ()*	Weishanite ()*

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 Au Fe H Hg K Mg Ni O S Sb Si Te V

Elements from minerals reported directly at this locality: Ag Al Au Fe H Hg K Mg Ni O S Sb Si Te V

Structural Groups for minerals in this locality:
Copper Diaspore Melonite Mica None Pyrite Quartz Rutile Sphalerite Stibnite
Zemannite

19 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	# of localities containing mineral
Calaverite ()*	Melonite	AuTe₂	65.5	361
Coloradoite ()*	Sphalerite	HgTe	65.5	169
Ferrotellurite ()*	None	Fe(Te⁶⁺O₄) (?)	65.5	1
Goethite ()*	Diaspore	FeO(OH)	65.5	7437
Gold ()*	Copper	Au	65.5	30554
Keystoneite ()*	Zemannite	Mg_0.5NiFe³⁺(Te⁴⁺O₃)₃·4H₂O	65.5	4
Magnolite ()*	None	Hg¹⁺₂(Te⁴⁺O₃)	65.5	3
Melonite ()*	Melonite	NiTe₂	65.5	207
Mercury ()*	None	Hg	65.5	397
Paratellurite ()*	Rutile	TeO₂	65.5	20
Pyrite ()*	Pyrite	FeS₂	65.5	39462
Quartz ()*	Quartz	SiO₂	65.5	61156
Roscoelite ()*	Mica	KV³⁺₂(Si₃Al)O₁₀(OH)₂	65.5	253
Silver ()*	Copper	Ag	65.5	5186
Stibnite ()*	Stibnite	Sb₂S₃	65.5	3418
Sylvanite ()*	Melonite	AgAuTe₄	65.5	337
Tellurite ()*	None	TeO₂	65.5	52
Tellurium ()*	None	Te	65.5	190
Weishanite ()*	None	(Au,Ag,Hg)	65.5	3

2 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
	Hg-00080	65.5	0		?-?						Yes		Calomel, Coloradoite, Magnolite, Mercury	Hg	24262	Magnolia District, Boulder Co., Colorado, USA		Kelly and Goddard (1969)		GSAM109_237
	Mo-00187	65.5	0		?-?						Yes		Molybdenite	Mo	24262	Magnolia District, Boulder Co., Colorado, USA		Kelly and Goddard (1969)		GSAM109_237

All locality data graciously provided by mindat.org

All age data...