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:
Mt St Helens District, Skamania Co., Washington, USA

Oldest recorded age at locality: 22
Youngest recorded age at locality: 16

mindat Locality ID: 31839
mindat URL: http://www.mindat.org/loc-31839.html

Tectonic Settings:

Total number of sublocalities beneath "Mt St Helens District, Skamania Co., Washington, USA": 48
Total number of bottom-level sublocalities: 40

Number of Child Localities: 27
Child Localities:
Black Falls
Black Hornet Claim
Black Mtn
Bumble Bee Claim
Commonwealth Claim
Copper Bottom Claim
Copper Dyke Claim
Crystal Claim
Dixie Queen Group (Star King Group; Star Queen Group; Chattanooga Group)
Goat Mtn
Golconda Mine
Grizzly Creek Mine
Index Claim
Insurance Claim
Last Hope Claim
Mining Creek
Minnie Alice Claim
Minnie Lee Claim
Morning Claim
Mt Margaret
Northern Light Claim
Northwestern Claim
Portland Elk Claim
Ryan Lake
Spirit Lake
Toledo Group
Washington Claim

Latitude: 46°20'48"N
Longitude: 122°8'18"W
Decimal Degree (lat, lon): 46.346666666667,-122.13833333333

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.

Allophane	Arsenopyrite	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Corundum	Covellite	Diaspore
Epidote	Kaolinite	Malachite	Mica	Molybdenite	Nickeline	None	Not in a structural group	Pyrite	Quartz
Rocksalt	Sphalerite	Spinel	Talc	Tourmaline

Arsenopyrite ()*	Azurite ()*	Bornite ()*	Calcite ()*	Chalcocite ()*
Chalcopyrite ()*	Chrysocolla ()*	Copper ()*	Covellite ()*	Epidote ()*
Galena ()*	Goethite ()*	Gold ()*	Hematite ()*	Kaolinite ()*
Magnetite ()*	Malachite ()*	Molybdenite ()*	Muscovite ()*	Pyrite ()*
Pyrrhotite ()*	Quartz ()*	Schorl ()*	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: Al As Au B C Ca Cu Fe H K Mg Mo Na O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Arsenopyrite Calcite Chalcopyrite Clay Clinozoisite Copper Corundum Covellite Diaspore
Epidote Kaolinite Malachite Mica Molybdenite Nickeline None Not in a structural group Pyrite Quartz
Rocksalt Sphalerite Spinel Talc Tourmaline

25 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	17	16	4	285532,285537,285544,285557	9052
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	17	16	1	285544	5509
Bornite ()*	None	Cu₅FeS₄	17	16	3	285532,285535,285544	5516
Calcite ()*	Calcite	Ca(CO₃)	22	16	2	285544,285571	27770
Chalcocite ()*	None	Cu₂S	17	16	2	285532,285544	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	17	16	20	285532,285533,285535,285536,285537,285538,285543,285544,285545,285547,285549,285554,285556,285557,285558,285559,285560,285561,285572,285573	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	17	16	1	285544	3531
Copper ()*	Copper	Cu	17	16	2	285544,285557	3846
Covellite ()*	Covellite	CuS	17	16	1	285544	4165
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	17	16	1	285544	8173
Galena ()*	Rocksalt	PbS	17	16	12	285535,285536,285537,285538,285541,285544,285545,285549,285557,285559,285571,285572	24243
Goethite ()*	Diaspore	FeO(OH)	22	16	1	285544	7437
Gold ()*	Copper	Au			3	285535,285545,285549	30554
Hematite ()*	Corundum	Fe₂O₃	22	16	1	285544	14640
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	17	16	1	285544	5591
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	17	16	1	285544	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	17	16	4	285532,285544,285556,285573	12537
Molybdenite ()*	Molybdenite	MoS₂	17	16	1	285544	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	22	16	2	285532,285544	17380
Pyrite ()*	Pyrite	FeS₂	17	16	20	285532,285533,285535,285537,285541,285543,285544,285545,285546,285547,285549,285553,285554,285556,285557,285558,285570,285571,285572,285573	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			2	285558,285572	9056
Quartz ()*	Quartz	SiO₂	22	16	16	285532,285535,285537,285543,285544,285545,285546,285549,285556,285557,285558,285560,285561,285571,285572,285573	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)			1	285555	2705
Sphalerite ()*	Sphalerite	ZnS	17	16	8	285536,285537,285544,285545,285557,285571,285572,285573	21482
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			3	285532,285549,285572	3337

7 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Sample Source	Sample Num	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 ID
NAVDAT-10982	22	21	21+1/-0		10982			25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA		NAVDAT	NAVDAT
NAVDAT-10983	22	21	21+1/-0		10983			25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA		NAVDAT	NAVDAT
NAVDAT-10984	22	21	21+1/-0		10984			25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA		NAVDAT	NAVDAT
NAVDAT-10985	22	21	21+1/-0		10985			25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA		NAVDAT	NAVDAT
NAVDAT-14610	17.8	16.8	17.3±0.5	whole rock	14610			25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA		NAVDAT	NAVDAT
NAVDAT-14611	17.4	16.4	16.9±0.5	whole rock	14611			25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA		NAVDAT	NAVDAT
PorphCu-00074	17	16	17–16			Arsenopyrite, Bornite, Chalcopyrite, Chrysocolla, Copper, Covellite, Epidote, Galena, Kaolinite, Magnetite, Molybdenite, Pyrite, Sphalerite	Cu	25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	Margaret	Singer et al. (2008)	USGSOFR2008_1155

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...