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:
Allegan, Allegan Co., Michigan, USA

mindat Locality ID: 195297
mindat URL: http://www.mindat.org/loc-195297.html

Tectonic Settings:

Total number of sublocalities beneath "Allegan, Allegan Co., Michigan, USA": 3
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Thomas Hill
Unnamed Au Placers

Latitude: 42°31'39"N
Longitude: 85°52'"W
Decimal Degree (lat, lon): 42.5275,-85.866666666667

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.

Cerite	Copper	Cubanite	Iron	None	Pyroxene	Sphalerite	Spinel

Chromite ()*	Copper ()*	Daubréelite ()*	Diopside ()*	Enstatite ()*
Gold ()*	Iron ()*	Isocubanite ()*	Mackinawite ()*	Merrillite ()*
Spinel ()*	Taenite ()*	Tetrataenite ()*	Troilite ()*

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 Au Ca Cr Cu Fe Mg Na Ni O P S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Cerite Copper Cubanite Iron None Pyroxene Sphalerite Spinel

14 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	1	219960	3902
Copper ()*	Copper	Cu	1	219960	3846
Daubréelite ()*	Spinel	FeCr₂S₄	1	219960	157
Diopside ()*	Pyroxene	CaMgSi₂O₆	1	219960	4135
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	1	219960	944
Gold ()*	Copper	Au	1	219961	30554
Iron ()*	Iron	Fe	1	219960	1089
Isocubanite ()*	Sphalerite Cubanite	CuFe₂S₃	1	219960	191
Mackinawite ()*	None	(Fe,Ni)_1+xS (x = 0-0.07)	1	219960	451
Merrillite ()*	Cerite	Ca₉NaMg(PO₄)₇	1	219960	230
Spinel ()*	Spinel	MgAl₂O₄	1	219960	1934
Taenite ()*	None	(Ni,Fe)	1	219960	703
Tetrataenite ()*	None	FeNi	1	219960	116
Troilite ()*	None	FeS	1	219960	1044

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...