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

Oldest recorded age at locality: 35
Youngest recorded age at locality: 21

mindat Locality ID: 296644
mindat URL: http://www.mindat.org/loc-296644.html

Tectonic Settings:

Total number of sublocalities beneath "Pebble Mountain, Picacho District, Chocolate Mts, Imperial Co., California, USA": 7
Total number of bottom-level sublocalities: 7

Number of Child Localities: 7
Child Localities:
Gold Eagle Mine
Golden Chain Mine
Goshen Placer Mine
Mayflower Mine
Million Dollar Gold Mine
Rainbow Mine [2] (Hess Claim; El Lucerne; El Lucero Claim; La Fortuga No. 1 Claim; La Fortuga No. 2 Claim; Missing Link Claim; Hess Mine; Cuidadela Claim)
Yellow Dog Mine

Latitude: 32°56'1"N
Longitude: 114°34'2"W
Decimal Degree (lat, lon): 32.933611111111,-114.56722222222

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.

Aragonite	Clay	Copper	Corundum	Mica	None	Quartz	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 Fe H K O Pb S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Aragonite Clay Copper Corundum Mica None Quartz Rocksalt

6 IMA Minerals at location:

Cerussite ()*	Galena ()*	Gold ()*	Hematite ()*	Muscovite ()*
Quartz ()*

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
Cerussite ()*	Aragonite	Pb(CO₃)	35	22.9	1	156655	4979
Galena ()*	Rocksalt	PbS	35	22.9	1	156655	24243
Gold ()*	Copper	Au	27.4	21	3	156652,156654,156657	30554
Hematite ()*	Corundum	Fe₂O₃	27.4	23.9	1	156657	14640
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	27.4	23.9	1	156657	17380
Quartz ()*	Quartz	SiO₂	27.4	23.9	1	156657	61156

7 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Age from other Locality	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
NAVDAT-16044	27	21	24±3				16044		296644	Pebble Mountain, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16046	27	21	24±3				16046		77038	Goshen Placer Mine, Pebble Mountain, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16008	24.1	22.9	23.5±0.6				16008		77093	Mayflower Mine, Pebble Mountain, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-5354	35	28.6	31.8±3.2			plagioclase	5354		77093	Mayflower Mine, Pebble Mountain, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
NAVDAT-16019	28.4	25.2	26.8±1.6				16019		77099	Million Dollar Gold Mine, Pebble Mountain, Picacho District, Chocolate Mts, Imperial Co., California, USA		NAVDAT	NAVDAT
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

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...