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:
Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA

Oldest recorded age at locality: 42
Youngest recorded age at locality: 31.7

mindat Locality ID: 110791
mindat URL: http://www.mindat.org/loc-110791.html

Tectonic Settings:

Total number of sublocalities beneath "Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°39'7"N
Longitude: 106°3'58"W
Decimal Degree (lat, lon): 38.651944444444,-106.06611111111

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.

Amorphous	Baryte	Calcite	Clay	Corundum	Diaspore	Fluorite	None	Pyrite	Quartz
Rutile	Smectite-vermiculite

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 Ba C Ca F Fe H Mg Mn Na O S Si

Elements from minerals reported directly at this locality: Al Ba C Ca F Fe H Mg Mn Na O S Si

Structural Groups for minerals in this locality:
Amorphous Baryte Calcite Clay Corundum Diaspore Fluorite None Pyrite Quartz
Rutile Smectite-vermiculite

11 IMA Minerals at location:

Baryte ()*	Calcite ()*	Fluorite ()*	Goethite ()*	Hematite ()*
Manganite ()*	Montmorillonite ()*	Opal ()*	Pyrite ()*	Pyrolusite ()*
Quartz ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Baryte ()*	Baryte	Ba(SO₄)	42	31.7	11547
Calcite ()*	Calcite	Ca(CO₃)	42	31.7	27770
Fluorite ()*	Fluorite	CaF₂	42	31.7	9617
Goethite ()*	Diaspore	FeO(OH)	42	31.7	7437
Hematite ()*	Corundum	Fe₂O₃	42	31.7	14640
Manganite ()*	Rutile	Mn³⁺O(OH)	42	31.7	770
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	42	31.7	1508
Opal ()*	Amorphous	SiO₂·nH₂O	42	31.7	2994
Pyrite ()*	Pyrite	FeS₂	42	31.7	39462
Pyrolusite ()*	Rutile	MnO₂	42	31.7	3106
Quartz ()*	Quartz	SiO₂	42	31.7	61156

2 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
	NAVDAT-35680	41.7	31.7	36.7±5					35680						110791	Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA		NAVDAT		NAVDAT
	NAVDAT-35681	42	32	37±5					35681						110791	Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...