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:
Johnson; Northern Lights Mine, Juneau District, Juneau, Alaska, USA

mindat Locality ID: 198242
mindat URL: http://www.mindat.org/loc-198242.html

Tectonic Settings:

Total number of sublocalities beneath "Johnson; Northern Lights Mine, Juneau District, Juneau, Alaska, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 58°51'57"N
Longitude: 135°3'57"W
Decimal Degree (lat, lon): 58.865833333333,-135.06583333333

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.

Arsenopyrite	Calcite	Chalcopyrite	Clay	Copper	Feldspar	Melonite	Mica	None	Pyrite
Quartz	Rocksalt	Rutile	Sphalerite	Tetrahedrite

Albite ()*	Ankerite ()*	Arsenopyrite ()*	Calaverite ()*	Calcite ()*
Chalcopyrite ()*	Dolomite ()*	Galena ()*	Gold ()*	Hessite ()*
Muscovite ()*	Petzite ()*	Pyrite ()*	Quartz ()*	Rutile ()*
Sphalerite ()*	Tetrahedrite-(Zn) ()*

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 As Au C Ca Cu Fe H K Mg Na O Pb S Sb Si Te Ti Zn

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

Structural Groups for minerals in this locality:
Arsenopyrite Calcite Chalcopyrite Clay Copper Feldspar Melonite Mica None Pyrite
Quartz Rocksalt Rutile Sphalerite Tetrahedrite

17 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	8803
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	3092
Arsenopyrite ()*	Arsenopyrite	FeAsS	9052
Calaverite ()*	Melonite	AuTe₂	361
Calcite ()*	Calcite	Ca(CO₃)	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	27198
Dolomite ()*	None	CaMg(CO₃)₂	9895
Galena ()*	Rocksalt	PbS	24243
Gold ()*	Copper	Au	30554
Hessite ()*	None	Ag₂Te	804
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	17380
Petzite ()*	None	Ag₃AuTe₂	409
Pyrite ()*	Pyrite	FeS₂	39462
Quartz ()*	Quartz	SiO₂	61156
Rutile ()*	Rutile	TiO₂	5614
Sphalerite ()*	Sphalerite	ZnS	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	5317

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...