Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Ore Knob, Ashe Co., North Carolina, USA

Oldest recorded age at locality: 482.51
Youngest recorded age at locality: 318.14

mindat Locality ID: 286831
mindat URL: http://www.mindat.org/loc-286831.html

Tectonic Settings:

Total number of sublocalities beneath "Ore Knob, Ashe Co., North Carolina, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Ore Knob Mine

Latitude: 36°24'30"N
Longitude: 81°19'25"W
Decimal Degree (lat, lon): 36.408333333333,-81.323611111111

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	Amphibole	Apophyllite	Arsenopyrite	Baryte	Calcite	Chalcopyrite	Chlorite	Clay	Clinozoisite
Copper	Epidote	Feldspar	Garnet	Kaolinite	Malachite	Marcasite	Mica	Nickeline	Nolanite
None	Not in a structural group	Pyrite	Pyroxene	Quartz	Rocksalt	Sphalerite	Spinel	Tetrahedrite	Thomsonite
Tourmaline	Wollastonite

Actinolite ()*	Alabandite ()*	Albite ()*	Almandine ()*	Ankerite ()*
Anthophyllite ()*	Arsenopyrite ()*	Augite ()*	Azurite ()*	Baryte ()*
Bornite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*	Chrysocolla ()*
Clinochlore ()*	Clinozoisite ()*	Copper ()*	Cuprite ()*	Diopside ()*
Dravite ()*	Epidote ()*	Ferrihydrite ()*	Gahnite ()*	Galena ()*
Hisingerite ()*	Hydroxyapophyllite-(K) ()*	Magnetite ()*	Malachite ()*	Marcasite ()*
Microcline ()*	Muscovite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Siderite ()*	Sphalerite ()*	Tetrahedrite-(Zn) ()*	Thomsonite-Ca ()*	Tremolite ()*
Wollastonite ()*	Zoisite ()*

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 B Ba C Ca Cu F Fe H K Mg Mn Na O Pb S Sb Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Amphibole Apophyllite Arsenopyrite Baryte Calcite Chalcopyrite Chlorite Clay Clinozoisite
Copper Epidote Feldspar Garnet Kaolinite Malachite Marcasite Mica Nickeline Nolanite
None Not in a structural group Pyrite Pyroxene Quartz Rocksalt Sphalerite Spinel Tetrahedrite Thomsonite
Tourmaline Wollastonite

42 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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	482.51	318.14	1	249231	3419
Alabandite ()*	Rocksalt	MnS	482.51	318.14	1	249231	312
Albite ()*	Feldspar	Na(AlSi₃O₈)	482.51	318.14	1	249231	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	482.51	318.14	1	249231	2353
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	482.51	318.14	1	249231	3092
Anthophyllite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂	482.51	318.14	1	249231	718
Arsenopyrite ()*	Arsenopyrite	FeAsS	482.51	318.14	1	249231	9052
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	482.51	318.14	1	249231	2060
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	482.51	318.14	1	249231	5509
Baryte ()*	Baryte	Ba(SO₄)	482.51	318.14	1	249231	11547
Bornite ()*	None	Cu₅FeS₄	482.51	318.14	1	249231	5516
Calcite ()*	Calcite	Ca(CO₃)	482.51	318.14	1	249231	27770
Chalcocite ()*	None	Cu₂S	482.51	318.14	1	249231	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	482.51	318.14	1	249231	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	482.51	318.14	1	249231	3531
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	482.51	318.14	1	249231	1756
Clinozoisite ()*	Clinozoisite Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)	482.51	318.14	1	249231	1025
Copper ()*	Copper	Cu	482.51	318.14	1	249231	3846
Cuprite ()*	Not in a structural group	Cu₂O	482.51	318.14	1	249231	2970
Diopside ()*	Pyroxene	CaMgSi₂O₆	482.51	318.14	1	249231	4135
Dravite ()*	Tourmaline	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	482.51	318.14	1	249231	648
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	482.51	318.14	1	249231	8173
Ferrihydrite ()*	Nolanite	Fe³⁺₁₀O₁₄(OH)₂	482.51	318.14	1	249231	86
Gahnite ()*	Spinel	ZnAl₂O₄	482.51	318.14	1	249231	445
Galena ()*	Rocksalt	PbS	482.51	318.14	1	249231	24243
Hisingerite ()*	Kaolinite Clay	Fe₂Si₂O₅(OH)₄·2H₂O	482.51	318.14	1	249231	144
Hydroxyapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀(OH,F)·8H₂O	482.51	318.14	1	249231	85
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	482.51	318.14	1	249231	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	482.51	318.14	1	249231	12537
Marcasite ()*	Marcasite	FeS₂	482.51	318.14	1	249231	5674
Microcline ()*	Feldspar	K(AlSi₃O₈)	482.51	318.14	1	249231	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	482.51	318.14	1	249231	17380
Pyrite ()*	Pyrite	FeS₂	482.51	318.14	1	249231	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	482.51	318.14	1	249231	9056
Quartz ()*	Quartz	SiO₂	482.51	318.14	1	249231	61156
Siderite ()*	Calcite	Fe(CO₃)	482.51	318.14	1	249231	6417
Sphalerite ()*	Sphalerite	ZnS	482.51	318.14	1	249231	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	482.51	318.14	1	249231	5317
Thomsonite-Ca ()*	Thomsonite	NaCa₂(Al₅Si₅)O₂₀·6H₂O	482.51	318.14	1	249231	452
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	482.51	318.14	1	249231	2562
Wollastonite ()*	Wollastonite	CaSiO₃	482.51	318.14	1	249231	1247
Zoisite ()*	Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)	482.51	318.14	1	249231	1025

10 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-Rb-Sr-02275	482.51	398.51	440.51±42	Rb-Sr	whole rock	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02276	482.51	398.51	440.51±42	Rb-Sr	whole rock	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02277	352.4	352.4	352.4	Rb-Sr	biotite	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02278	482.51	398.51	440.51±42	Rb-Sr	whole rock	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02279	482.51	398.51	440.51±42	Rb-Sr	whole rock	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02291	318.14	318.14	318.14	Rb-Sr	biotite	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02293	320.91	320.91	320.91	Rb-Sr	biotite	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02294	331.26	331.26	331.26	Rb-Sr	biotite	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02295	331.26	331.26	331.26	Rb-Sr	biotite	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02296	331.26	331.26	331.26	Rb-Sr	biotite	17340	Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA	USGS-Rb-Sr	USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...