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:
Comstock Mine Area, Dos Cabezas (Two Heads) District, Dos Cabezas Mts, Cochise Co., Arizona, USA

Oldest recorded age at locality: 0
Youngest recorded age at locality: 0

mindat Locality ID: 46695
mindat URL: http://www.mindat.org/loc-46695.html

Tectonic Settings:

Total number of sublocalities beneath "Comstock Mine Area, Dos Cabezas (Two Heads) District, Dos Cabezas Mts, Cochise Co., Arizona, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Unnamed Small Prospect

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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.

Bismutite	Clay	Descloizite	Meneghinite	None	Pyrite	Quartz	Smectite-vermiculite

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 Bi C Cu Fe H Na O Pb S Si V

Elements from minerals reported directly at this locality: Bi Cu Fe Pb S

Structural Groups for minerals in this locality:
Bismutite Clay Descloizite Meneghinite None Pyrite Quartz Smectite-vermiculite

8 IMA Minerals at location:

Bismutite ()*	Clinobisvanite ()*	Gladite ()*	Mottramite ()*	Nontronite ()*
Pekoite ()*	Pyrite ()*	Quartz ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Bismutite ()*	Bismutite	Bi₂O₂(CO₃)	1	136675	716
Clinobisvanite ()*	None	Bi(VO₄)	1	136675	36
Gladite ()*	Meneghinite	CuPbBi₅S₉	0		67
Mottramite ()*	Descloizite	PbCu(VO₄)(OH)	1	136675	362
Nontronite ()*	Clay Smectite-vermiculite	Na_0.3Fe³⁺₂(Si,Al)₄O₁₀(OH)₂·nH₂O	1	136675	471
Pekoite ()*	Meneghinite	CuPbBi₁₁S₁₈	0		39
Pyrite ()*	Pyrite	FeS₂	0		39462
Quartz ()*	Quartz	SiO₂	1	136675	61156

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_554	Near-surface occurrence. Recently forming oxalate associated with cave deposits, in Cochise County, Arizona.

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
	Michelle_554	0	0	Recent		Age of whewellite mineralization	high				Yes		Whewellite		15570	Cochise Co., Arizona, USA	Cochise County	Hofmann and Bernasconi (1998)	10.1016/S0009-2541(98)00043-6	CG149_127	Described as "recent cave deposits."

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...