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:
Clark Mine, Copper Harbor, Keweenaw Co., Michigan, USA

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

mindat Locality ID: 10119
mindat URL: http://www.mindat.org/loc-10119.html

Tectonic Settings:

Total number of sublocalities beneath "Clark Mine, Copper Harbor, Keweenaw Co., Michigan, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 47°26'45"N
Longitude: 87°51'37"W
Decimal Degree (lat, lon): 47.445833333333,-87.860277777778

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.

Analcime	Apophyllite	Brochantite	Calcite	Chlorite	Clay	Clinozoisite	Copper	Epidote	Feldspar
Gadolinite	Malachite	Natrolite	None	Not in a structural group	Prehnite	Pumpellyite	Quartz	Rhodonite	Rutile
Thomsonite	Zircon

Analcime ()*	Babingtonite ()*	Brochantite ()*	Calcite ()*	Chalcocite ()*
Clinochlore ()*	Copper ()*	Cuprite ()*	Datolite ()*	Dolomite ()*
Epidote ()*	Fluorapophyllite-(K) ()*	Langite ()*	Laumontite ()*	Malachite ()*
Microcline ()*	Natrolite ()*	Posnjakite ()*	Prehnite ()*	Pumpellyite-(Fe²⁺) ()*
Pyrolusite ()*	Quartz ()*	Silver ()*	Tenorite ()*	Thomsonite-Ca ()*
Zircon ()*

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 C Ca Cu F Fe H K Mg Mn Na O S Si Zr

Elements from minerals reported directly at this locality: Ag Al B C Ca Cu F Fe H K Mg Mn Na O S Si Zr

Structural Groups for minerals in this locality:
Analcime Apophyllite Brochantite Calcite Chlorite Clay Clinozoisite Copper Epidote Feldspar
Gadolinite Malachite Natrolite None Not in a structural group Prehnite Pumpellyite Quartz Rhodonite Rutile
Thomsonite Zircon

26 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	1060	1047	1627
Babingtonite ()*	Rhodonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)	1060	1047	161
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	1060	1047	1633
Calcite ()*	Calcite	Ca(CO₃)	1060	1047	27770
Chalcocite ()*	None	Cu₂S	1060	1047	5707
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	1060	1047	1756
Copper ()*	Copper	Cu	1060	1047	3846
Cuprite ()*	Not in a structural group	Cu₂O	1060	1047	2970
Datolite ()*	Gadolinite	CaB(SiO₄)(OH)	1060	1047	498
Dolomite ()*	None	CaMg(CO₃)₂	1060	1047	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1060	1047	8173
Fluorapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀F·8H₂O	1060	1047	303
Langite ()*	None	Cu₄(SO₄)(OH)₆·2H₂O	1060	1047	593
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	1060	1047	1271
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	1060	1047	12537
Microcline ()*	Feldspar	K(AlSi₃O₈)	1060	1047	4924
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	1060	1047	1236
Posnjakite ()*	None	Cu₄(SO₄)(OH)₆·H₂O	1060	1047	309
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	1060	1047	1898
Pumpellyite-(Fe²⁺) ()*	Pumpellyite	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂·H₂O	1060	1047	30
Pyrolusite ()*	Rutile	MnO₂	1060	1047	3106
Quartz ()*	Quartz	SiO₂	1060	1047	61156
Silver ()*	Copper	Ag	1060	1047	5186
Tenorite ()*	None	CuO	1060	1047	1101
Thomsonite-Ca ()*	Thomsonite	NaCa₂(Al₅Si₅)O₂₀·6H₂O	1060	1047	452
Zircon ()*	Zircon	Zr(SiO₄)	1060	1047	5251

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...