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:
Annex Mine, Bonanza Mine Group (Mellgren Group; Chance Mine; Mellgren Mine; Mellgren Mine), Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA

Oldest recorded age at locality: 145
Youngest recorded age at locality: 0

mindat Locality ID: 32897
mindat URL: http://www.mindat.org/loc-32897.html

Tectonic Settings:

Total number of sublocalities beneath "Annex Mine, Bonanza Mine Group (Mellgren Group; Chance Mine; Mellgren Mine; Mellgren Mine), Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA": 0
Total number of bottom-level sublocalities: 0

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.

No IMA Minerals occur at this locality according to mindat

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.

7 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	Age from other Locality	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."
EG94_211-00055	76	76		Pb-Pb			whole rock?	T11	Yes			19445	Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA	Tombstone	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00056	76	76		Pb-Pb			whole rock?	T21	Yes			19445	Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA	Tombstone	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00057	72	72		Pb-Pb			whole rock?	T32	Yes			19445	Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA	Tombstone	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00058	66	66	66	Pb-Pb			whole rock?	T44	Yes			19445	Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA	Tombstone	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
Mo-00180	76	66		U-Th-Pb?, Pb-Pb?					Yes	Molybdofornacite, Wulfenite	Mo	19445	Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA	Tombstone Volcanics	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211	76-66 Ma is the age range of volcanics at Tombstone including Bronco Volcanics (76 Ma), Schieffelin Granodiorite (76 Ma), Rhyodacite stock (72 Ma), and Tombstone Rhyolite (66 Ma).
sedznpb-00497	145	2.6	Cretaceous–Tertiary						Yes			19445	Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA	Tombstone	Singer et al. (2009)		USGSOFR2009-1252

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...