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:
Alpha, Washington District (Omega District), Nevada Co., California, USA

Oldest recorded age at locality: 388
Youngest recorded age at locality: 388

mindat Locality ID: 267769
mindat URL: http://www.mindat.org/loc-267769.html

Tectonic Settings:

Total number of sublocalities beneath "Alpha, Washington District (Omega District), Nevada Co., California, USA": 13
Total number of bottom-level sublocalities: 13

Number of Child Localities: 13
Child Localities:
Alpha Diggings Placer Mine (Alpha Diggings)
Giant King Quartz Mine (Giant King; Giant King Qtz.; Jumbo Vein; Giant King Vein)
Krumbecker Mine (South Cumbecker)
Local Option Placer
Olsen Prospect
Paine Claims (Neva May And Genevieve)
Phelps Hill Consolidated (Phelps Hill Cons.; Phelps Mine)
Scotchman Creek Placer
Steep Hollow Placer
Unnamed Placer Au Occurrence [28]
Unnamed Placer Au Occurrences [31]
Unnamed Tertiary Au Deposits [23]
Victory Claim (Mount Hill Chrome Mine [1917-1918]; Victory Hill [1941])

Latitude: 39°19'39"N
Longitude: 120°47'6"W
Decimal Degree (lat, lon): 39.3275,-120.785

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.

Copper	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: Au Cr Fe O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Copper None Pyrite Quartz Spinel

4 IMA Minerals at location:

Chromite ()*	Gold ()*	Pyrite ()*	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
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	388	388	2	166334,166342	3902
Gold ()*	Copper	Au			4	166330,166331,166338,166341	30554
Pyrite ()*	Pyrite	FeS₂			1	166331	39462
Quartz ()*	Quartz	SiO₂			1	166331	61156

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
	podchrome-00166	388	388	pre-Early Devonian-Jurassic (388±17 Ma U-Pb zircon from felsic igneous rocks; 174 Ma K-Ar white mica from blueschists)										Cr	84529	Olsen Prospect, Alpha, Washington District (Omega District), Nevada Co., California, USA	Olsen	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...