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:
Middle Mountain Prospect, La Plata District (Winfield District), Chaffee Co., Colorado, USA

Oldest recorded age at locality: 39
Youngest recorded age at locality: 29

mindat Locality ID: 110823
mindat URL: http://www.mindat.org/loc-110823.html

Tectonic Settings:

Total number of sublocalities beneath "Middle Mountain Prospect, La Plata District (Winfield District), Chaffee Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°58'31"N
Longitude: 106°27'45"W
Decimal Degree (lat, lon): 38.975277777778,-106.4625

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.

Beryl	Fluorite	Molybdenite	None	Quartz	Stibnite	Topaz

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 Be Bi Ca F Mo O S Si

Elements from minerals reported directly at this locality: Al Be Bi Ca F Mo O S Si

Structural Groups for minerals in this locality:
Beryl Fluorite Molybdenite None Quartz Stibnite Topaz

6 IMA Minerals at location:

Beryl ()*	Bismuthinite ()*	Fluorite ()*	Molybdenite ()*	Quartz ()*
Topaz ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	39	29	4286
Bismuthinite ()*	Stibnite	Bi₂S₃	39	29	1935
Fluorite ()*	Fluorite	CaF₂	39	29	9617
Molybdenite ()*	Molybdenite	MoS₂	39	29	5800
Quartz ()*	Quartz	SiO₂	39	29	61156
Topaz ()*	Topaz	Al₂SiO₄F₂	39	29	1476

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-19685	39	29	34±5					19685						110823	Middle Mountain Prospect, La Plata District (Winfield District), Chaffee Co., Colorado, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...