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:
Mendota Mine, Mount Bohemia, Lac La Belle, Keweenaw Co., Michigan, USA

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

mindat Locality ID: 16083
mindat URL: http://www.mindat.org/loc-16083.html

Tectonic Settings:

Total number of sublocalities beneath "Mendota Mine, Mount Bohemia, Lac La Belle, Keweenaw Co., Michigan, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 47°23'30"N
Longitude: 88°'47"W
Decimal Degree (lat, lon): 47.391666666667,-88.013055555556

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.

Allophane	Calcite	Chalcopyrite	Copper	Feldspar	Malachite	None

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 C Ca Cu Fe H Na O S Si

Elements from minerals reported directly at this locality: Al C Ca Cu Fe H Na O S Si

Structural Groups for minerals in this locality:
Allophane Calcite Chalcopyrite Copper Feldspar Malachite None

8 IMA Minerals at location:

Albite ()*	Bornite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*
Chrysocolla ()*	Copper ()*	Malachite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	1060	1047	8803
Bornite ()*	None	Cu₅FeS₄	1060	1047	5516
Calcite ()*	Calcite	Ca(CO₃)	1060	1047	27770
Chalcocite ()*	None	Cu₂S	1060	1047	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1060	1047	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	1060	1047	3531
Copper ()*	Copper	Cu	1060	1047	3846
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	1060	1047	12537

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...