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:
Eldorado Bar Deposit (Eldorado Strip Mine), Eldorado Bar, East Helena, Lewis And Clark Co., Montana, USA

mindat Locality ID: 122777
mindat URL: http://www.mindat.org/loc-122777.html

Tectonic Settings:

Total number of sublocalities beneath "Eldorado Bar Deposit (Eldorado Strip Mine), Eldorado Bar, East Helena, Lewis And Clark Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 46°44'10"N
Longitude: 111°51'6"W
Decimal Degree (lat, lon): 46.736111111111,-111.85166666667

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	Corundum	Garnet	None	Not in a structural group	Quartz	Rutile	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 Au F Fe O Si Sn

Elements from minerals reported directly at this locality: Al Au F Fe O Si Sn

Structural Groups for minerals in this locality:
Copper Corundum Garnet None Not in a structural group Quartz Rutile Topaz

8 IMA Minerals at location:

Almandine ()*	Cassiterite ()*	Corundum ()*	Gold ()*	Hematite ()*
Kyanite ()*	Quartz ()*	Topaz ()*

Mineral name	Structural Groups	IMA Formula	# of localities containing mineral
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	2353
Cassiterite ()*	Rutile	SnO₂	5171
Corundum ()*	Corundum	Al₂O₃	1797
Gold ()*	Copper	Au	30554
Hematite ()*	Corundum	Fe₂O₃	14640
Kyanite ()*	Not in a structural group	Al₂OSiO₄	1507
Quartz ()*	Quartz	SiO₂	61156
Topaz ()*	Topaz	Al₂SiO₄F₂	1476

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...