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, Keystone Gold District, Pennington Co., South Dakota, USA

mindat Locality ID: 278092
mindat URL: http://www.mindat.org/loc-278092.html

Tectonic Settings:

Total number of sublocalities beneath "Keystone, Keystone Gold District, Pennington Co., South Dakota, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Columbia Mine (Maiden Mine)

Latitude: 43°53'53"N
Longitude: 103°25'1"W
Decimal Degree (lat, lon): 43.898055555556,-103.41694444444

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.

Calcite	Chalcopyrite	Copper	Nickeline	None	Quartz	Sphalerite

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 Au C Ca Cu Fe O S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Chalcopyrite Copper Nickeline None Quartz Sphalerite

9 IMA Minerals at location:

Ankerite ()*	Calcite ()*	Chalcopyrite ()*	Gold ()*	Graphite ()*
Pyrrhotite ()*	Quartz ()*	Silver ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	1	266114	3092
Calcite ()*	Calcite	Ca(CO₃)	1	266114	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1	266114	27198
Gold ()*	Copper	Au	1	266114	30554
Graphite ()*	None	C	1	266114	2812
Pyrrhotite ()*	Nickeline	Fe₇S₈	1	266114	9056
Quartz ()*	Quartz	SiO₂	1	266114	61156
Silver ()*	Copper	Ag	1	266114	5186
Sphalerite ()*	Sphalerite	ZnS	1	266114	21482

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...