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:
Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA

Oldest recorded age at locality: 27.4
Youngest recorded age at locality: 22.9

mindat Locality ID: 216264
mindat URL: http://www.mindat.org/loc-216264.html

Tectonic Settings:

Total number of sublocalities beneath "Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA": 24
Total number of bottom-level sublocalities: 24

Number of Child Localities: 24
Child Localities:
Butler Prospect
Butterfly And Pinto Deposit
Central Claim
Crescent Placer Mine
Georgia Placer Mine
Golden Eagle Mine (Telluride Mine)
Good Site
Gulch Placer Mine (California Picacho; Picacho Basin Placers)
H. J. R. Research 51 Project Prospect
H. J. R. Research Project Prospect
Harp Prospect
Kohl Placer Mine
Picacho Copper Mine (Picacho Mine; Picacho Glance; Copper Glance Mine; Copper King Mine)
Red Fox Mine
St. Anthony Mine
St. Joseph Mine (Gold Prince; Golden Dream Mine; Gold Princess; Gold Queen; Oriental; Oro Blanco; Ponce De Leon; Alfonso; Gold Crown; Alcyon; Gold Hill; White Gold Basin Mine; Jita)
Unnamed Ag Occurrence [3] (Quartz-Schist Outcrop)
Unnamed Ag Occurrence [4] (Quartz-Schist Outcrop)
Unnamed Ag Occurrence [5] (Quartz-Schist Outcrop)
Unnamed Ag Prospect [2]
Unnamed Cu-Ag Prospect [2]
Unspecified Occurrences At Or Near Picacho
Wallace-Spencer Mine
Zimmer Prospect

Latitude: 33°0'58"N
Longitude: 114°39'50"W
Decimal Degree (lat, lon): 33.016111111111,-114.66388888889

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	Copper	Feldspar	Malachite	Mica	None	Not in a structural group	Rocksalt

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 C Cu Fe H K O Pb S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Chalcopyrite Clay Copper Feldspar Malachite Mica None Not in a structural group Rocksalt

8 IMA Minerals at location:

Azurite ()*	Chalcopyrite ()*	Galena ()*	Gold ()*	Malachite ()*
Muscovite ()*	Orthoclase ()*	Tenorite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	27.4	23.9	1	156672	5509
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	27.4	23.9	2	156672,156681	27198
Galena ()*	Rocksalt	PbS	27.4	23.9	1	156681	24243
Gold ()*	Copper	Au	27.4	22.9	4	156663,156666,156667,156675	30554
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	27.4	23.9	1	156672	12537
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	27.4	23.9	1	156672	17380
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	27.4	23.9	1	156672	2349
Tenorite ()*	None	CuO	27.4	23.9	1	156672	1101

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
Giersdorf_00000390	27.4	24.2	25.8±1.6	K-Ar	Age suspected to be older than the Kinter formation found in the Chocolate Mountains.	UAKA-68-09	216264	Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA	Picacho Peak Quad.	Shafiqullah et al. (1980)	AGSD12_201
Giersdorf_00000391	26.9	23.9	25.4±1.5	K-Ar		UAKA-67-01	216264	Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA	Picacho Peak Quad.	Shafiqullah et al. (1980)	AGSD12_201
NAVDAT-15997	24.1	22.9	23.5±0.6			15997	77039	Gulch Placer Mine (California Picacho; Picacho Basin Placers), Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-15999	24.1	22.9	23.5±0.6			15999	77039	Gulch Placer Mine (California Picacho; Picacho Basin Placers), Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...