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:
Las Guijas Mine Group (Immense Lode; Grand Lode; General Electric Mine; General Electric Group Of Claims; Obregon Claims; Black Gold Group), Las Guijas Mts, Arivaca District (Las Guijas District), Las Guijas & San Luis Mts, Pima Co., Arizona, USA

Oldest recorded age at locality: 70
Youngest recorded age at locality: 67.2

mindat Locality ID: 34583
mindat URL: http://www.mindat.org/loc-34583.html

Tectonic Settings:

Total number of sublocalities beneath "Las Guijas Mine Group (Immense Lode; Grand Lode; General Electric Mine; General Electric Group Of Claims; Obregon Claims; Black Gold Group), Las Guijas Mts, Arivaca District (Las Guijas District), Las Guijas & San Luis Mts, Pima Co., Arizona, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 31°39'21"N
Longitude: 111°22'44"W
Decimal Degree (lat, lon): 31.655833333333,-111.37888888889

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.

Chalcopyrite	Clay	Columbite	Copper	Fluorite	Mica	None	Pyrite	Rocksalt	Scheelite
Sphalerite	Spinel

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 Ca Cu F Fe H K Mn O Pb S Si W Zn

Elements from minerals reported directly at this locality: Al Au Ca Cu F Fe H K Mn O Pb S Si W Zn

Structural Groups for minerals in this locality:
Chalcopyrite Clay Columbite Copper Fluorite Mica None Pyrite Rocksalt Scheelite
Sphalerite Spinel

11 IMA Minerals at location:

Bornite ()*	Chalcopyrite ()*	Fluorite ()*	Galena ()*	Gold ()*
Hübnerite ()*	Magnetite ()*	Muscovite ()*	Pyrite ()*	Scheelite ()*
Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Bornite ()*	None	Cu₅FeS₄	70	67.2	5516
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	70	67.2	27198
Fluorite ()*	Fluorite	CaF₂	70	67.2	9617
Galena ()*	Rocksalt	PbS	70	67.2	24243
Gold ()*	Copper	Au	70	67.2	30554
Hübnerite ()*	Columbite	Mn²⁺(WO₄)	70	67.2	469
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	70	67.2	14899
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	70	67.2	17380
Pyrite ()*	Pyrite	FeS₂	70	67.2	39462
Scheelite ()*	Scheelite	Ca(WO₄)	70	67.2	4894
Sphalerite ()*	Sphalerite	ZnS	70	67.2	21482

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_00000355	70	67.2	68.6±1.4	K-Ar				UAKA-77-50		Yes				31250	Arivaca District (Las Guijas District), Las Guijas & San Luis Mts, Pima Co., Arizona, USA	Arivaca District	Shafiqullah et al. (1980)		AGSD12_201

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...