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:
El Tiro Mine (El Tiro Pit; El Tiro Open Pit; Red Rock Group), Silver Bell Mine, Mineral Mountain, Silver Bell District, Silver Bell Mts, Pima Co., Arizona, USA

Oldest recorded age at locality: 69
Youngest recorded age at locality: 62.9

mindat Locality ID: 36338
mindat URL: http://www.mindat.org/loc-36338.html

Tectonic Settings:

Total number of sublocalities beneath "El Tiro Mine (El Tiro Pit; El Tiro Open Pit; Red Rock Group), Silver Bell Mine, Mineral Mountain, Silver Bell District, Silver Bell Mts, Pima Co., Arizona, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 32°24'57"N
Longitude: 111°32'12"W
Decimal Degree (lat, lon): 32.415833333333,-111.53666666667

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.

Allophane	Aragonite	Brochantite	Calcite	Chalcopyrite	Clay	Copper	Epsomite	Kaolinite	Melanterite
Molybdenite	None	Not in a structural group	Pyrite	Quartz	Rocksalt	Serpentine	Turquoise

Brochantite ()*	Cacoxenite ()*	Cerussite ()*	Chalcocite ()*	Chalcopyrite ()*
Chlorargyrite ()*	Chrysocolla ()*	Copper ()*	Cuprite ()*	Epsomite ()*
Kaolinite ()*	Lizardite ()*	Melanterite ()*	Molybdenite ()*	Pyrite ()*
Quartz ()*	Smithsonite ()*	Torbernite ()*	Turquoise ()*

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: Ag Al C Cl Cu Fe H Mg Mo O P Pb S Si U Zn

Elements from minerals reported directly at this locality: Ag Al C Cl Cu Fe H Mg Mo O P Pb S Si U Zn

Structural Groups for minerals in this locality:
Allophane Aragonite Brochantite Calcite Chalcopyrite Clay Copper Epsomite Kaolinite Melanterite
Molybdenite None Not in a structural group Pyrite Quartz Rocksalt Serpentine Turquoise

19 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	69	66	1633
Cacoxenite ()*	None	Fe³⁺₂₄AlO₆(PO₄)₁₇(OH)₁₂·75H₂O	69	62.9	280
Cerussite ()*	Aragonite	Pb(CO₃)	69	62.9	4979
Chalcocite ()*	None	Cu₂S	69	66	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	69	66	27198
Chlorargyrite ()*	Rocksalt	AgCl	69	62.9	1382
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	69	66	3531
Copper ()*	Copper	Cu	69	66	3846
Cuprite ()*	Not in a structural group	Cu₂O	69	66	2970
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O	69	62.9	484
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	69	62.9	5591
Lizardite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	69	62.9	359
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	69	62.9	915
Molybdenite ()*	Molybdenite	MoS₂	63.5	62.9	5800
Pyrite ()*	Pyrite	FeS₂	69	66	39462
Quartz ()*	Quartz	SiO₂	69	62.9	61156
Smithsonite ()*	Calcite	Zn(CO₃)	69	62.9	2473
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	69	66	1059
Turquoise ()*	Turquoise	CuAl₆(PO₄)₄(OH)₈·4H₂O	69	66	484

2 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
	PorphCu-00087	69	66	69-66							Yes		Actinolite, Chalcanthite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Cuprite, Diopside, Epidote, Jarosite, Malachite, Molybdenite, Pyrite, Tenorite, Wollastonite	Cu	31299	Silver Bell District, Silver Bell Mts, Pima Co., Arizona, USA	Silver Bell	Singer et al. (2008)		USGSOFR2008_1155
	Mo-00053	63.5	62.9	63.2±0.3	Re-Os			molybdenite	SB-1		Yes	Molybdenite	Molybdenite	Mo	3374	Silver Bell Mine, Mineral Mountain, Silver Bell District, Silver Bell Mts, Pima Co., Arizona, USA	Silverbell	Barra et al. (2005)	10.2113/gsecongeo.100.8.1605	EG100_1605

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...