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:
Comet Mine (Rumley; Gray Eagle), Wickes Mining District, Jefferson Co., Montana, USA

Oldest recorded age at locality: 60
Youngest recorded age at locality: 5.3

mindat Locality ID: 68352
mindat URL: http://www.mindat.org/loc-68352.html

Tectonic Settings:

Total number of sublocalities beneath "Comet Mine (Rumley; Gray Eagle), Wickes Mining District, Jefferson Co., Montana, 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.

Chalcopyrite	Copper	None	Pyrite	Quartz	Rocksalt	Sphalerite	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: Au Cu Fe O Pb S Sb Si Zn

Elements from minerals reported directly at this locality: Au Cu Fe O Pb S Sb Si Zn

Structural Groups for minerals in this locality:
Chalcopyrite Copper None Pyrite Quartz Rocksalt Sphalerite Tetrahedrite

7 IMA Minerals at location:

Chalcopyrite ()*	Galena ()*	Gold ()*	Pyrite ()*	Quartz ()*
Sphalerite ()*	Tetrahedrite-(Zn) ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	60	5.3	27198
Galena ()*	Rocksalt	PbS	60	5.3	24243
Gold ()*	Copper	Au	60	5.3	30554
Pyrite ()*	Pyrite	FeS₂	60	5.3	39462
Quartz ()*	Quartz	SiO₂	60	5.3	61156
Sphalerite ()*	Sphalerite	ZnS	60	5.3	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	60	5.3	5317

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Giersdorf_00000882	Boulder batholith in western Montana extends from a few miles south of Helena to about 20 miles south of Butte. The northern part of the hatholith includes most of the batholith north of the latitude of Boulder and a narrow strip near the east margin of the batholith south of Boulder. This area lies between the Elkhorn mountains on the east and the rather broad, high-level surface making up the Continental Divide on the west. Although the area is mountainous, the topography is not rugged but is characterized by smoothly rounded ridges commonlya bout 1,000 feet above the major valleys. Most of the higher valleys were occupied by glaciers in the Pleistocene epoch, but typical alpine cirques are rare. The localities listed here are the Uranium deposits found within the Boulder Batholith.

Age ID

Locality Notes

Giersdorf_00000882

Boulder batholith in western Montana extends from a few miles south of Helena to about 20 miles south of Butte. The northern part of the hatholith includes most of the batholith north of the latitude of Boulder and a narrow strip near the east margin of the batholith south of Boulder. This area lies between the Elkhorn mountains on the east and the rather broad, high-level surface making up the Continental Divide on the west. Although the area is mountainous, the topography is not rugged but is characterized by smoothly rounded ridges commonlya bout 1,000 feet above the major valleys. Most of the higher valleys were occupied by glaciers in the Pleistocene epoch, but typical alpine cirques are rare. The localities listed here are the Uranium deposits found within the Boulder Batholith.

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
	Giersdorf_00000882	60	5.3	60-paleocene				alaskite			Yes			U	166261	W. Wilson Mine (Liverpool Mine), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	W. Wilson Mine	Becraft (1956)	10.2113/gsecongeo.51.4.362	EG51_362	The age for the Uranium deposits of the Boulder Batholith are described as being post-Alaskite of 60 Ma and pre-Dacite, which is described as being early Oligocene by one of the author's references up to Miocene by another.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...