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:
Bald Mountain Mine, T12 R8 WELS, Aroostook Co., Maine, USA

Oldest recorded age at locality: 450
Youngest recorded age at locality: 450

mindat Locality ID: 7558
mindat URL: http://www.mindat.org/loc-7558.html

Tectonic Settings: Continental Arc

Total number of sublocalities beneath "Bald Mountain Mine, T12 R8 WELS, Aroostook Co., Maine, 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.

Arsenopyrite	Chalcopyrite	Chlorite	Clay	Copper	Covellite	Diaspore	Enargite	Nickeline	None
Pyrite	Quartz	Sphalerite	Wurtzite

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 As Au Cu Fe H Mg O S Si Zn

Elements from minerals reported directly at this locality: Al As Au Cu Fe H Mg O S Si Zn

Structural Groups for minerals in this locality:
Arsenopyrite Chalcopyrite Chlorite Clay Copper Covellite Diaspore Enargite Nickeline None
Pyrite Quartz Sphalerite Wurtzite

12 IMA Minerals at location:

Arsenopyrite ()*	Chalcocite ()*	Chalcopyrite ()*	Chamosite ()*	Covellite ()*
Enargite ()*	Goethite ()*	Gold ()*	Pyrite ()*	Pyrrhotite ()*
Quartz ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	450	450	9052
Chalcocite ()*	None	Cu₂S	450	450	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	450	450	27198
Chamosite ()*	Chlorite Clay	(Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈	450	450	577
Covellite ()*	Covellite	CuS	450	450	4165
Enargite ()*	Enargite Wurtzite	Cu₃AsS₄	450	450	910
Goethite ()*	Diaspore	FeO(OH)	450	450	7437
Gold ()*	Copper	Au	450	450	30554
Pyrite ()*	Pyrite	FeS₂	450	450	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	450	450	9056
Quartz ()*	Quartz	SiO₂	450	450	61156
Sphalerite ()*	Sphalerite	ZnS	450	450	21482

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
	vms-01053	450	450	Ordovician										S	7558	Bald Mountain Mine, T12 R8 WELS, Aroostook Co., Maine, USA	Bald Mountain	Moiser et al. (2009)		USGSOFR2009_1034

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...