Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Acton, Acton District, San Gabriel Mts, Los Angeles Co., California, USA

Oldest recorded age at locality: 1205
Youngest recorded age at locality: 1167

mindat Locality ID: 222523
mindat URL: http://www.mindat.org/loc-222523.html

Tectonic Settings:

Total number of sublocalities beneath "Acton, Acton District, San Gabriel Mts, Los Angeles Co., California, USA": 52
Total number of bottom-level sublocalities: 46

Number of Child Localities: 38
Child Localities:
Acton 1 Deposit
Acton Clay Project
AP Group And APB Group
Apex Prospect (Apex Deposit)
Caliproducts Mine
Casa Grande Prospect
Condor Prospect (Condor Deposit)
Dorothy Ann Mine (Dorothy Ann Claim)
Du Pont Deposit (Pigment Division Of E.I. Du Pont De Nemours & Co; Alder Creek 1; Alder Creek 5 - 0060370159; Mount Gleason 7)
Duncan Deposit
Eagle Prospect
Emma Group (Conover; Parker Mountain)
Eureka Mine
Gold Queen Mine
Gordon Feldspar Mine
Granite Mountain
Grassy Canyon
Kelly Brothers Prospect
Lucky Chase Deposit (Lucky Chass)
M. C. Elizabeth Placer
Marris Quartz Mine (Marrie Quartz)
Mica I (Mica Claim)
Mill Creek Occurrence
Monte Cristo Canyon
Mount Gleason
Mount Gleason Mine (Last Chance Mine; Eagle Mine)
North Fork Of Tujunga Canyon
Padre Claim
Peabody And West Claim
Peerless Claim
San Gabriel Anorthosite Prospect
Sand And Pacoima Canyons Placer
Soledad Canyon
Trail Canyon 3 Deposit
Trail Canyon 6 Deposit
Trail Canyon 7 Deposit
Tujunga Group (Tajungo Group)
Western San Gabriel Mountains Mine

Latitude: 34°23'29"N
Longitude: 118°11'19"W
Decimal Degree (lat, lon): 34.391388888889,-118.18861111111

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	Corundum	Feldspar	Malachite	Marcasite	Mica	Molybdenite	None
Not in a structural group	Pyrite	Quartz	Sphalerite	Spinel	Titanite

Albite ()*	Azurite ()*	Chalcocite ()*	Chalcopyrite ()*	Copper ()*
Cuprite ()*	Graphite ()*	Ilmenite ()*	Magnetite ()*	Malachite ()*
Marcasite ()*	Microcline ()*	Molybdenite ()*	Muscovite ()*	Pyrite ()*
Quartz ()*	Sphalerite ()*	Titanite ()*

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 C Ca Cu Fe H K Mo Na O S Si Ti Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Chalcopyrite Clay Copper Corundum Feldspar Malachite Marcasite Mica Molybdenite None
Not in a structural group Pyrite Quartz Sphalerite Spinel Titanite

18 IMA Minerals at location:

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
Albite ()*	Feldspar	Na(AlSi₃O₈)	1205	1167	1	161344	8803
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	1205	1167	1	161357	5509
Chalcocite ()*	None	Cu₂S	1205	1167	1	161357	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1205	1167	1	161342	27198
Copper ()*	Copper	Cu	1205	1167	1	161357	3846
Cuprite ()*	Not in a structural group	Cu₂O	1205	1167	1	161357	2970
Graphite ()*	None	C	1205	1167	1	161338	2812
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	1205	1167	8	161317,161323,161345,161358,161364,161365,161366,161368	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1205	1167	8	161317,161323,161345,161358,161364,161365,161366,161368	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	1205	1167	1	161357	12537
Marcasite ()*	Marcasite	FeS₂	1205	1167	1	161342	5674
Microcline ()*	Feldspar	K(AlSi₃O₈)	1205	1167	2	161333,161335	4924
Molybdenite ()*	Molybdenite	MoS₂	1205	1167	2	161336,161344	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1205	1167	3	161320,161324,161341	17380
Pyrite ()*	Pyrite	FeS₂	1205	1167	1	161344	39462
Quartz ()*	Quartz	SiO₂	1205	1167	1	161357	61156
Sphalerite ()*	Sphalerite	ZnS	1205	1167	1	161342	21482
Titanite ()*	Titanite	CaTi(SiO₄)O	1205	1167	1	161357	4899

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
	Bradley_2012_125	1205	1167	1186±19	U/Pb			zircon			Yes	Zircon			28941	San Gabriel Mts, Los Angeles Co., California, USA	Mendenhall Peak	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...