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:
Copper Falls, Keweenaw Co., Michigan, USA

Oldest recorded age at locality: 1060
Youngest recorded age at locality: 1047

mindat Locality ID: 24161
mindat URL: http://www.mindat.org/loc-24161.html

Tectonic Settings:

Total number of sublocalities beneath "Copper Falls, Keweenaw Co., Michigan, USA": 12
Total number of bottom-level sublocalities: 10

Number of Child Localities: 6
Child Localities:
Arnold Mine
Ashbed Mine
Copper Falls Mine
Humboldt Mine
Owl Creek
Petherick Mine

Latitude: 47°25'18"N
Longitude: 88°12'49"W
Decimal Degree (lat, lon): 47.421666666667,-88.213611111111

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.

Acanthite	Allophane	Analcime	Apophyllite	Baryte	Calcite	Clay	Clinozoisite	Copper	Epidote
Feldspar	Gadolinite	Kaolinite	Natrolite	None	Not in a structural group	Prehnite	Pumpellyite	Quartz	Rutile
Stilbite	Thomsonite

Acanthite ()*	Analcime ()*	Baryte ()*	Calcite ()*	Chalcocite ()*
Chrysocolla ()*	Copper ()*	Datolite ()*	Epidote ()*	Fluorapophyllite-(K) ()*
Kaolinite ()*	Laumontite ()*	Manganite ()*	Mesolite ()*	Microcline ()*
Natrolite ()*	Prehnite ()*	Pumpellyite-(Mg) ()*	Quartz ()*	Silver ()*
Stilbite-Ca ()*	Thomsonite-Ca ()*

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 Al B Ba C Ca Cu F Fe H K Mg Mn Na O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Acanthite Allophane Analcime Apophyllite Baryte Calcite Clay Clinozoisite Copper Epidote
Feldspar Gadolinite Kaolinite Natrolite None Not in a structural group Prehnite Pumpellyite Quartz Rutile
Stilbite Thomsonite

22 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Acanthite ()*	Acanthite	Ag₂S	1060	1047	1	221798	2793
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	1060	1047	4	221797,221798,221803,221807	1627
Baryte ()*	Baryte	Ba(SO₄)	1060	1047	1	221798	11547
Calcite ()*	Calcite	Ca(CO₃)	1060	1047	4	221798,221804,221806,221807	27770
Chalcocite ()*	None	Cu₂S	1060	1047	1	221798	5707
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	1060	1047	1	221798	3531
Copper ()*	Copper	Cu	1060	1047	9	221798,221799,221800,221801,221802,221803,221804,221805,221807	3846
Datolite ()*	Gadolinite	CaB(SiO₄)(OH)	1060	1047	5	221797,221798,221801,221803,221807	498
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1060	1047	2	221798,221807	8173
Fluorapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀F·8H₂O	1060	1047	1	221806	303
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	1060	1047	1	221798	5591
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	1060	1047	1	221798	1271
Manganite ()*	Rutile	Mn³⁺O(OH)	1060	1047	1	221797	770
Mesolite ()*	Natrolite	Na₂Ca₂(Si₉Al₆)O₃₀·8H₂O	1060	1047	1	221797	425
Microcline ()*	Feldspar	K(AlSi₃O₈)	1060	1047	1	221798	4924
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	1060	1047	4	221796,221797,221798,221807	1236
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	1060	1047	3	221798,221806,221807	1898
Pumpellyite-(Mg) ()*	Pumpellyite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂·H₂O	1060	1047	3	221798,221805,221807	106
Quartz ()*	Quartz	SiO₂	1060	1047	3	221798,221806,221807	61156
Silver ()*	Copper	Ag	1060	1047	3	221798,221805,221807	5186
Stilbite-Ca ()*	Stilbite	NaCa₄(Si₂₇Al₉)O₇₂·28H₂O	1060	1047	1	221798	268
Thomsonite-Ca ()*	Thomsonite	NaCa₂(Al₅Si₅)O₂₀·6H₂O	1060	1047	1	221798	452

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
	Mo-00057	1060	1047		Rb-Sr						Yes		Kamiokite	Mo	3847	Keweenaw Co., Michigan, USA		Bornhorst et al. (1988)	10.2113/gsecongeo.83.3.619	EG83_619

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...