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:
Gold Bar Mine (O'Brien Mine; Little Jim; Jenny Lynn; Interior Mining And Trust Co. Mine; Homestake; Crown; Black Bear), Amazon Wash, Constellation, Black Rock District, Yavapai Co., Arizona, USA

Oldest recorded age at locality: 114
Youngest recorded age at locality: 108

mindat Locality ID: 48389
mindat URL: http://www.mindat.org/loc-48389.html

Tectonic Settings:

Total number of sublocalities beneath "Gold Bar Mine (O'Brien Mine; Little Jim; Jenny Lynn; Interior Mining And Trust Co. Mine; Homestake; Crown; Black Bear), Amazon Wash, Constellation, Black Rock District, Yavapai Co., Arizona, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 34°5'4"N
Longitude: 112°34'9"W
Decimal Degree (lat, lon): 34.084444444444,-112.56916666667

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.

Clay	Copper	Corundum	Mica	None	Pyrite

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 Fe H K O S Si

Elements from minerals reported directly at this locality: Al Au Fe H K O S Si

Structural Groups for minerals in this locality:
Clay Copper Corundum Mica None Pyrite

4 IMA Minerals at location:

Gold ()*	Hematite ()*	Muscovite ()*	Pyrite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Gold ()*	Copper	Au	114	108	30554
Hematite ()*	Corundum	Fe₂O₃	114	108	14640
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	114	108	17380
Pyrite ()*	Pyrite	FeS₂	114	108	39462

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
	Giersdorf_00000347	114	108	111±3	K-Ar	K-Ar age partially reset by some magmatic event			UAKA-72-25		Yes				46724	Constellation, Black Rock District, Yavapai Co., Arizona, USA	Constellation mining district	Shafiqullah et al. (1980)		AGSD12_201

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...