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:
Cobalt Lode (Margaret Tin Mine), Keystone Gold District, Pennington Co., South Dakota, USA

mindat Locality ID: 45260
mindat URL: http://www.mindat.org/loc-45260.html

Tectonic Settings:

Total number of sublocalities beneath "Cobalt Lode (Margaret Tin Mine), Keystone Gold District, Pennington Co., South Dakota, 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.

Arsenic	Clay	Mica	None	Quartz	Stibnite	Triplite

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 Bi C F Fe H K Mn O P S Si

Elements from minerals reported directly at this locality: Al Bi C F H K Mn O P S Si

Structural Groups for minerals in this locality:
Arsenic Clay Mica None Quartz Stibnite Triplite

7 IMA Minerals at location:

Bismite ()*	Bismuth ()*	Bismuthinite ()*	Graphite ()*	Muscovite ()*
Quartz ()*	Triplite ()*

Mineral name	Structural Groups	IMA Formula	# of localities containing mineral
Bismite ()*	None	Bi₂O₃	214
Bismuth ()*	Arsenic	Bi	1966
Bismuthinite ()*	Stibnite	Bi₂S₃	1935
Graphite ()*	None	C	2812
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	17380
Quartz ()*	Quartz	SiO₂	61156
Triplite ()*	Triplite	Mn²⁺₂(PO₄)F	233

No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

All age data...