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:
Reef Ridge Prospect, McGrath District, Yukon-Koyukuk Census Area, Alaska, USA

Oldest recorded age at locality: 419
Youngest recorded age at locality: 393

mindat Locality ID: 199655
mindat URL: http://www.mindat.org/loc-199655.html

Tectonic Settings:

Total number of sublocalities beneath "Reef Ridge Prospect, McGrath District, Yukon-Koyukuk Census Area, Alaska, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 63°23'2"N
Longitude: 154°21'50"W
Decimal Degree (lat, lon): 63.383888888889,-154.36388888889

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.

Aragonite	Baryte	Calcite	Clay	Corundum	Diaspore	Gypsum	Kaolinite	Marcasite	Mica
None	Pyrite	Quartz	Rocksalt	Smectite-vermiculite	Sphalerite

Baryte ()*	Calcite ()*	Cerussite ()*	Dolomite ()*	Galena ()*
Goethite ()*	Gypsum ()*	Hematite ()*	Hydrozincite ()*	Kaolinite ()*
Marcasite ()*	Muscovite ()*	Pyrite ()*	Quartz ()*	Sauconite ()*
Smithsonite ()*	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 Ba C Ca Fe H K Mg Na O Pb S Si Zn

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

Structural Groups for minerals in this locality:
Aragonite Baryte Calcite Clay Corundum Diaspore Gypsum Kaolinite Marcasite Mica
None Pyrite Quartz Rocksalt Smectite-vermiculite Sphalerite

17 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Baryte ()*	Baryte	Ba(SO₄)	419	393	11547
Calcite ()*	Calcite	Ca(CO₃)	419	393	27770
Cerussite ()*	Aragonite	Pb(CO₃)	419	393	4979
Dolomite ()*	None	CaMg(CO₃)₂	419	393	9895
Galena ()*	Rocksalt	PbS	419	393	24243
Goethite ()*	Diaspore	FeO(OH)	419	393	7437
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	419	393	6890
Hematite ()*	Corundum	Fe₂O₃	419	393	14640
Hydrozincite ()*	None	Zn₅(CO₃)₂(OH)₆	419	393	1066
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	419	393	5591
Marcasite ()*	Marcasite	FeS₂	419	393	5674
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	419	393	17380
Pyrite ()*	Pyrite	FeS₂	419	393	39462
Quartz ()*	Quartz	SiO₂	419	393	61156
Sauconite ()*	Clay Smectite-vermiculite	Na_0.3Zn₃(Si,Al)₄O₁₀(OH)₂·4H₂O	419	393	56
Smithsonite ()*	Calcite	Zn(CO₃)	419	393	2473
Sphalerite ()*	Sphalerite	ZnS	419	393	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
	sedexmvt-00234	419	393	Early Devonian		host rock age									199655	Reef Ridge Prospect, McGrath District, Yukon-Koyukuk Census Area, Alaska, USA	Reef Ridge	Taylor et al. (2009)		USGSOFR2009_1297

All locality data graciously provided by mindat.org

All age data...