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:
Newtown, Grass Valley District, Nevada Co., California, USA

Oldest recorded age at locality: 157
Youngest recorded age at locality: 157

mindat Locality ID: 268009
mindat URL: http://www.mindat.org/loc-268009.html

Tectonic Settings:

Total number of sublocalities beneath "Newtown, Grass Valley District, Nevada Co., California, USA": 14
Total number of bottom-level sublocalities: 14

Number of Child Localities: 14
Child Localities:
A & B Native Son Lode Mine (Native Son)
Codd Prospects
Contention Placer
Empress Mine (Newton; Dull; Mulcahy)
Grass Valley Extension Mine (Grass Valley Ext.)
Jordan Mine (Glennan Mine)
Midnight Mine
Mulcahy Prospect
Patty Craney Mine
Peck Fraction Occurrence
Porter Property
Red Hill Specimen Occurrence
Unnamed Fe Occurrence [2] (Iron Location)
Uranus Mine

Latitude: 39°14'52"N
Longitude: 121°5'33"W
Decimal Degree (lat, lon): 39.247777777778,-121.0925

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	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 Si

Elements from minerals reported directly at this locality:

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

3 IMA Minerals at location:

Chromite ()*	Gold ()*	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	157	157	3	165681,165687,165690	3902
Gold ()*	Copper	Au			4	165680,165683,165684,165693	30554
Quartz ()*	Quartz	SiO₂			4	165680,165683,165684,165693	61156

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
podchrome-00173	157	157	Middle Jurassic	Cr	83973	Codd Prospects, Newtown, Grass Valley District, Nevada Co., California, USA	Codd	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00172	157	157	Middle Jurassic	Cr	84455	Mulcahy Prospect, Newtown, Grass Valley District, Nevada Co., California, USA	Mulcahy	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00170	157	157	Middle Jurassic	Cr	84595	Porter Property, Newtown, Grass Valley District, Nevada Co., California, USA	Porter Property	Moiser et al. (2012)	USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...