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

Oldest recorded age at locality: 27.4
Youngest recorded age at locality: 21

mindat Locality ID: 296626
mindat URL: http://www.mindat.org/loc-296626.html

Tectonic Settings:

Total number of sublocalities beneath "Picacho Peak, Picacho District, Chocolate Mts, Imperial Co., California, USA": 15
Total number of bottom-level sublocalities: 15

Number of Child Localities: 15
Child Localities:
California Picacho Mine
Gaviland Copper Claims (Wallace Prospect)
Indian Rose Mine
Iron Gold Bearer Mine
Little Gold Reef Mine
Little Tinner Mine
Mendeville Mine (Meniville Group Of Claims)
Monte Carlo Mine
Picacho Mine (Picacho Gold Mine; Goshen; Helen May; Tierra Rica; Mina Rica; St. George; California Gold King; Picacho Basin; Golden Rule; Venus; Jayne; Golden Casket; Dulciana; Mars)
Quien Sabe Prospect (Quion Sabe Prospect)
Roadside Mine (Picacho Peak Project; Christie)
Sagebrush Mine
Sweet Potatoes Mine
Unnamed Dumortierite Occurrence [2]
Wallace Prospect

Latitude: 32°59'6"N
Longitude: 114°41'9"W
Decimal Degree (lat, lon): 32.985,-114.68583333333

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.

Calcite	Clay	Copper	Corundum	Diaspore	Dumortierite	Feldspar	Mica	None	Pyrite
Quartz	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: Ag Al Au B C Ca Fe H K O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Clay Copper Corundum Diaspore Dumortierite Feldspar Mica None Pyrite
Quartz Spinel

11 IMA Minerals at location:

Calcite ()*	Dumortierite ()*	Goethite ()*	Gold ()*	Hematite ()*
Magnetite ()*	Microcline ()*	Muscovite ()*	Pyrite ()*	Quartz ()*
Silver ()*

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
Calcite ()*	Calcite	Ca(CO₃)	27.4	23.9	1	156693	27770
Dumortierite ()*	Dumortierite	AlAl₆BSi₃O₁₈	27.4	23.9	1	156698	231
Goethite ()*	Diaspore	FeO(OH)	27.4	23.9	1	156693	7437
Gold ()*	Copper	Au	27.4	23.9	2	156688,156693	30554
Hematite ()*	Corundum	Fe₂O₃	27.4	23.9	1	156693	14640
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	27.4	23.9	1	156693	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	27.4	23.9	1	156693	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	27.4	23.9	1	156693	17380
Pyrite ()*	Pyrite	FeS₂	27.4	23.9	1	156693	39462
Quartz ()*	Quartz	SiO₂	27.4	23.9	2	156693,156694	61156
Silver ()*	Copper	Ag	27.4	23.9	1	156693	5186

8 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Num	Age from other Locality	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	Yes	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	Yes	216264	Picacho, Picacho District, Chocolate Mts, Imperial Co., California, USA	Picacho Peak Quad.	Shafiqullah et al. (1980)	AGSD12_201
NAVDAT-16030	27	21	24±3			16030		296626	Picacho Peak, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16041	22.4	21.2	21.8±0.6			16041		296626	Picacho Peak, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16048	27	21	24±3			16048		296626	Picacho Peak, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16049	27	21	24±3			16049		296626	Picacho Peak, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16009	24.1	22.9	23.5±0.6			16009		76974	California Picacho Mine, Picacho Peak, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16045	27	21	24±3			16045		77144	Roadside Mine (Picacho Peak Project; Christie), Picacho Peak, 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...