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:
Eighty-Five Group, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA

Oldest recorded age at locality: 63
Youngest recorded age at locality: 22.3

mindat Locality ID: 67392
mindat URL: http://www.mindat.org/loc-67392.html

Tectonic Settings:

Total number of sublocalities beneath "Eighty-Five Group, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 32°20'58"N
Longitude: 112°55'19"W
Decimal Degree (lat, lon): 32.349444444444,-112.92194444444

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.

No IMA Minerals occur at this locality according to mindat

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	Age from other Locality	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
EG94_211-00047	63	63	63	Pb-Pb	whole rock?	805	Yes	3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00048	63	63	63	Pb-Pb	whole rock?	806	Yes	3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00049	63	63	63	Pb-Pb	whole rock?	214	Yes	3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
NAVDAT-88776	27.7	22.3	25±2.7			88776		67392	Eighty-Five Group, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...