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 River Prospect, Redoubt District, Kenai Peninsula Borough, Alaska, USA

Oldest recorded age at locality: 190
Youngest recorded age at locality: 190

mindat Locality ID: 195712
mindat URL: http://www.mindat.org/loc-195712.html

Tectonic Settings: Continental Arc

Total number of sublocalities beneath "Johnson River Prospect, Redoubt District, Kenai Peninsula Borough, Alaska, USA": 1
Total number of bottom-level sublocalities: 2

Latitude: 60°7'15"N
Longitude: 152°57'14"W
Decimal Degree (lat, lon): 60.120833333333,-152.95388888889

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.

Baryte	Calcite	Chalcopyrite	Clay	Copper	Corundum	Mica	None	Not in a structural group	Pyrite
Quartz	Rocksalt	Smectite-vermiculite	Sphalerite

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 Au Ba C Ca Cu Fe H K Mg Na O Pb S Si Zn

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

Structural Groups for minerals in this locality:
Baryte Calcite Chalcopyrite Clay Copper Corundum Mica None Not in a structural group Pyrite
Quartz Rocksalt Smectite-vermiculite Sphalerite

13 IMA Minerals at location:

Anhydrite ()*	Baryte ()*	Calcite ()*	Celadonite ()*	Chalcopyrite ()*
Galena ()*	Gold ()*	Hematite ()*	Montmorillonite ()*	Muscovite ()*
Pyrite ()*	Quartz ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Anhydrite ()*	Not in a structural group	Ca(SO₄)	190	190	1588
Baryte ()*	Baryte	Ba(SO₄)	190	190	11547
Calcite ()*	Calcite	Ca(CO₃)	190	190	27770
Celadonite ()*	Mica Clay	KMgFe³⁺Si₄O₁₀(OH)₂	190	190	309
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	190	190	27198
Galena ()*	Rocksalt	PbS	190	190	24243
Gold ()*	Copper	Au	190	190	30554
Hematite ()*	Corundum	Fe₂O₃	190	190	14640
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	190	190	1508
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	190	190	17380
Pyrite ()*	Pyrite	FeS₂	190	190	39462
Quartz ()*	Quartz	SiO₂	190	190	61156
Sphalerite ()*	Sphalerite	ZnS	190	190	21482

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
	vms-00993	190	190	Lower Jurassic										S	195712	Johnson River Prospect, Redoubt District, Kenai Peninsula Borough, Alaska, USA	Johnson River Prospect	Moiser et al. (2009)		USGSOFR2009_1034

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...