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:
Midnite Mine (Midnight Mine; Boyd Lease), Wellpinit, Stevens Co., Washington, USA

Oldest recorded age at locality: 51.5
Youngest recorded age at locality: 50.5

mindat Locality ID: 7252
mindat URL: http://www.mindat.org/loc-7252.html

Tectonic Settings:

Total number of sublocalities beneath "Midnite Mine (Midnight Mine; Boyd Lease), Wellpinit, Stevens Co., Washington, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 47°56'26"N
Longitude: 118°5'31"W
Decimal Degree (lat, lon): 47.940555555556,-118.09194444444

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.

Amorphous	Andalusite	Arsenopyrite	Autunite	Calcite	Chalcopyrite	Clay	Clinozoisite	Epidote	Fluorite
Kaolinite	Marcasite	Meta-autunite	Mica	Molybdenite	None	Phosphuranylite	Pyrite	Pyroxene	Quartz
Smectite-vermiculite	Sphalerite	Spinel	Stilbite	Vesuvianite	Wollastonite	Zippeite	Zircon

Andalusite ()*	Arsenopyrite ()*	Autunite ()*	Calcite ()*	Chalcopyrite ()*
Coffinite ()*	Delvauxite ()*	Diopside ()*	Epidote ()*	Graphite ()*
Hisingerite ()*	Kaolinite ()*	Liebigite ()*	Magnetite ()*	Marcasite ()*
Meta-autunite ()*	Molybdenite ()*	Montmorillonite ()*	Muscovite ()*	Phlogopite ()*
Phosphuranylite ()*	Pyrite ()*	Quartz ()*	Sklodowskite ()*	Sphalerite ()*
Stilbite-Na ()*	Torbernite ()*	Uraninite ()*	Uranophane-α ()*	Vesuvianite ()*
Wollastonite ()*	Zippeite ()*

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 As C Ca Cu F Fe H K Mg Mo Na O P S Si U Zn

Elements from minerals reported directly at this locality: Al As C Ca Cu F Fe H K Mg Mo Na O P S Si U Zn

Structural Groups for minerals in this locality:
Amorphous Andalusite Arsenopyrite Autunite Calcite Chalcopyrite Clay Clinozoisite Epidote Fluorite
Kaolinite Marcasite Meta-autunite Mica Molybdenite None Phosphuranylite Pyrite Pyroxene Quartz
Smectite-vermiculite Sphalerite Spinel Stilbite Vesuvianite Wollastonite Zippeite Zircon

32 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Andalusite ()*	Andalusite	Al₂SiO₅	51.5	50.5	1310
Arsenopyrite ()*	Arsenopyrite	FeAsS	51.5	50.5	9052
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	51.5	50.5	1272
Calcite ()*	Calcite	Ca(CO₃)	51.5	50.5	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	51.5	50.5	27198
Coffinite ()*	Zircon	U(SiO₄)·nH₂O	51.5	50.5	566
Delvauxite ()*	Amorphous	CaFe³⁺₄(PO₄)₂(OH)₈·4-5H₂O	51.5	50.5	41
Diopside ()*	Pyroxene	CaMgSi₂O₆	51.5	50.5	4135
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	51.5	50.5	8173
Graphite ()*	None	C	51.5	50.5	2812
Hisingerite ()*	Kaolinite Clay	Fe₂Si₂O₅(OH)₄·2H₂O	51.5	50.5	144
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	51.5	50.5	5591
Liebigite ()*	None	Ca₂(UO₂)(CO₃)₃·11H₂O	51.5	50.5	78
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	51.5	50.5	14899
Marcasite ()*	Marcasite	FeS₂	51.5	50.5	5674
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	51.5	50.5	388
Molybdenite ()*	Molybdenite	MoS₂	51.5	50.5	5800
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	51.5	50.5	1508
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	51.5	50.5	17380
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	51.5	50.5	2273
Phosphuranylite ()*	Phosphuranylite	KCa(H₃O)₃(UO₂)₇(PO₄)₄O₄·8H₂O	51.5	50.5	182
Pyrite ()*	Pyrite	FeS₂	51.5	50.5	39462
Quartz ()*	Quartz	SiO₂	51.5	50.5	61156
Sklodowskite ()*	None	Mg(UO₂)₂(SiO₃OH)₂·6H₂O	51.5	50.5	56
Sphalerite ()*	Sphalerite	ZnS	51.5	50.5	21482
Stilbite-Na ()*	Stilbite	Na₉(Si₂₇Al₉)O₇₂·28H₂O	51.5	50.5	15
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	51.5	50.5	1059
Uraninite ()*	Fluorite	UO₂	51.5	50.5	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	51.5	50.5	890
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀	51.5	50.5	1395
Wollastonite ()*	Wollastonite	CaSiO₃	51.5	50.5	1247
Zippeite ()*	Zippeite	K₂[(UO₂)₄(SO₄)₂O₂(OH)₂](H₂O)₄	51.5	50.5	175

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
	EG76_89	51.5	50.5	51±0.5	207Pb/204Pb-235U/204Pb	age of high grade ores	high	whole rock					Hisingerite, Marcasite, Pyrite, Sphalerite	U, S	7252	Midnite Mine (Midnight Mine; Boyd Lease), Wellpinit, Stevens Co., Washington, USA	Uranium ores at the Midnite Mine, Washington	Ludwig et al. (1981)	10.2113/gsecongeo.76.1.89	EG76_89	Fig. 4; USGS https://mrdata.usgs.gov/geochron/show.php?labno=8956 states that the ore formed 51 Ma

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...