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:
Idaho-Maryland Mine (Idaho Maryland Prospect; Maryland Mine; Howard Hill/Morning Dew; Idaho Maryland-Brunswick), Idaho-Maryland Group, Grass Valley, Grass Valley District, Nevada Co., California, USA

mindat Locality ID: 8154
mindat URL: http://www.mindat.org/loc-8154.html

Tectonic Settings:

Total number of sublocalities beneath "Idaho-Maryland Mine (Idaho Maryland Prospect; Maryland Mine; Howard Hill/Morning Dew; Idaho Maryland-Brunswick), Idaho-Maryland Group, Grass Valley, Grass Valley District, Nevada Co., California, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Idaho Gold Quartz Mine (Idaho Gold Qtz; Idaho Mine)
Maryland Mine (Maryland Vein; Maryland Consolidated Quartz Mine And Mill Site; Maryland Con Qtz Mine; Maryland Ext. Qtz)

Latitude: 39°13'16"N
Longitude: 121°1'52"W
Decimal Degree (lat, lon): 39.221111111111,-121.03111111111

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	Chalcopyrite	Clay	Copper	Mica	None	Not in a structural group	Pyrite	Quartz	Rocksalt
Scheelite	Sphalerite	Talc

Ankerite ()*	Calcite ()*	Chalcopyrite ()*	Dolomite ()*	Galena ()*
Gold ()*	Hessite ()*	Magnesite ()*	Muscovite ()*	Naumannite ()*
Petzite ()*	Pyrite ()*	Quartz ()*	Scheelite ()*	Sphalerite ()*
Talc ()*

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 C Ca Cu Fe H K Mg O Pb S Se Si Te W Zn

Elements from minerals reported directly at this locality: Ag Al Au C Ca Cu Fe H K Mg O Pb S Se Si Te W Zn

Structural Groups for minerals in this locality:
Calcite Chalcopyrite Clay Copper Mica None Not in a structural group Pyrite Quartz Rocksalt
Scheelite Sphalerite Talc

16 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	0		3092
Calcite ()*	Calcite	Ca(CO₃)	0		27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	0		27198
Dolomite ()*	None	CaMg(CO₃)₂	0		9895
Galena ()*	Rocksalt	PbS	0		24243
Gold ()*	Copper	Au	1	165495	30554
Hessite ()*	None	Ag₂Te	0		804
Magnesite ()*	Calcite	Mg(CO₃)	0		1487
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	0		17380
Naumannite ()*	Not in a structural group	Ag₂Se	0		192
Petzite ()*	None	Ag₃AuTe₂	0		409
Pyrite ()*	Pyrite	FeS₂	0		39462
Quartz ()*	Quartz	SiO₂	1	165495	61156
Scheelite ()*	Scheelite	Ca(WO₄)	0		4894
Sphalerite ()*	Sphalerite	ZnS	0		21482
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	0		3337

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...