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:
Demos Group (Margie; Roger; Independent; Lucky Joe; Potosi Tungsten; Rockefeller), Potosi Mining District, Madison Co., Montana, USA

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

mindat Locality ID: 161091
mindat URL: http://www.mindat.org/loc-161091.html

Tectonic Settings:

Total number of sublocalities beneath "Demos Group (Margie; Roger; Independent; Lucky Joe; Potosi Tungsten; Rockefeller), Potosi Mining District, Madison Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 45°34'32"N
Longitude: 111°58'30"W
Decimal Degree (lat, lon): 45.575555555556,-111.975

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.

Baryte	Chalcopyrite	Columbite	Fluorite	None	Pyrite	Rocksalt	Tetrahedrite

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 Ca Cl Cu F Fe Mn O Pb S Sb W

Elements from minerals reported directly at this locality: Ag Ca Cl Cu F Fe Mn O Pb S Sb W Zn

Structural Groups for minerals in this locality:
Baryte Chalcopyrite Columbite Fluorite None Pyrite Rocksalt Tetrahedrite

7 IMA Minerals at location:

Anglesite ()*	Chalcopyrite ()*	Chlorargyrite ()*	Fluorite ()*	Hübnerite ()*
Pyrite ()*	Tetrahedrite-(Zn) ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Anglesite ()*	Baryte	Pb(SO₄)	70	70	2734
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	70	70	27198
Chlorargyrite ()*	Rocksalt	AgCl	70	70	1382
Fluorite ()*	Fluorite	CaF₂	70	70	9617
Hübnerite ()*	Columbite	Mn²⁺(WO₄)	70	70	469
Pyrite ()*	Pyrite	FeS₂	70	70	39462
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	70	70	5317

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
	Mo-00186	70	70								Yes		Molybdenite, Powellite, Wulfenite	Mo	23236	Madison Co., Montana, USA	Madison County	Gammons et al. (2006)	10.1007/s10230-006-0113-7	MWE25_70

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...