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:
Black Iron Mine (Eagle No. 2 Mine; Iron Mask), Gilman, Gilman District (Battle Mountain District; Red Cliff District), Eagle Co., Colorado, USA

Oldest recorded age at locality: 37.8
Youngest recorded age at locality: 33.8

mindat Locality ID: 8716
mindat URL: http://www.mindat.org/loc-8716.html

Tectonic Settings:

Total number of sublocalities beneath "Black Iron Mine (Eagle No. 2 Mine; Iron Mask), Gilman, Gilman District (Battle Mountain District; Red Cliff District), Eagle Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°31'14"N
Longitude: 106°23'8"W
Decimal Degree (lat, lon): 39.520555555556,-106.38555555556

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.

Alunite	Aragonite	Baryte	Calcite	Coquimbite	Epsomite	Melanterite	None	Not in a structural group	Pyrite
Rocksalt	Rutile	Sulphur

Anglesite ()*	Cerussite ()*	Coquimbite ()*	Fibroferrite ()*	Galena ()*
Goslarite ()*	Jarosite ()*	Melanterite ()*	Pyrite ()*	Pyrolusite ()*
Siderite ()*	Smithsonite ()*	Sulphur ()*

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: C Fe H K Mn O Pb S Zn

Elements from minerals reported directly at this locality: Al C Fe H K Mn O Pb S Zn

Structural Groups for minerals in this locality:
Alunite Aragonite Baryte Calcite Coquimbite Epsomite Melanterite None Not in a structural group Pyrite
Rocksalt Rutile Sulphur

13 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Anglesite ()*	Baryte	Pb(SO₄)	37.8	33.8	2734
Cerussite ()*	Aragonite	Pb(CO₃)	37.8	33.8	4979
Coquimbite ()*	Coquimbite	AlFe₃(SO₄)₆(H₂O)₁₂·6H₂O	37.8	33.8	136
Fibroferrite ()*	Not in a structural group	Fe³⁺(SO₄)(OH)·5H₂O	37.8	33.8	107
Galena ()*	Rocksalt	PbS	37.8	33.8	24243
Goslarite ()*	Epsomite	Zn(SO₄)·7H₂O	37.8	33.8	188
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆	37.8	33.8	2228
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	37.8	33.8	915
Pyrite ()*	Pyrite	FeS₂	37.8	33.8	39462
Pyrolusite ()*	Rutile	MnO₂	37.8	33.8	3106
Siderite ()*	Calcite	Fe(CO₃)	37.8	33.8	6417
Smithsonite ()*	Calcite	Zn(CO₃)	37.8	33.8	2473
Sulphur ()*	Sulphur	S	37.8	33.8	2045

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
	sedznpb-00463	37.8	33.8	35.8±2							Yes				3616	Gilman District (Battle Mountain District; Red Cliff District), Eagle Co., Colorado, USA	Gilman	Singer et al. (2009)		USGSOFR2009-1252

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...