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:
Orange Co., North Carolina, USA

Oldest recorded age at locality: 705.12
Youngest recorded age at locality: 675.12

mindat Locality ID: 24703
mindat URL: http://www.mindat.org/loc-24703.html

Tectonic Settings:

Total number of sublocalities beneath "Orange Co., North Carolina, USA": 44
Total number of bottom-level sublocalities: 42

Number of Child Localities: 40
Child Localities:
Bacon Quarry
Bradsher Prospect
Chapel Hill
Chapel Hill Mine
Chapel Hill Quarry
Crawford Mountain Prospect
Dell Dawson Prospect
Duke Forest Prospect
Duke Quarry
E. M. Stroud Prospect
Eno Quarry
Eno River Rock Quarry
Eno Rock Quarry
Haw Gold Mine
Hill Prospect
Hillsboro Mine (Hillsborough Mine & Mill)
Hillsborough
Hillsborough Andalusite Occurrence
Hillsborough District
Horse Farm Occurrence
Laurel Hill Prospect
Lovers Leap Prospect
Martin Morrow Mine
Mebane Quarry
Mitchell Mountain Prospect
Murray Prospect
New Duke Quarry
North State Mine (Robertson)
Nunn Mountain Prospect
Oaks Prospect
Old Duke Quarry
Ray Prospect
Saline Sykes Prospect
Secondary Road 1135 Prospect
Shambly Prospect
Stebbins Prospect
Stroud Prospect
Teer Prospect
Weaver-Carr Prospect
Womble Prospect

Latitude: 35°58'45"N
Longitude: 79°8'9"W
Decimal Degree (lat, lon): 35.979166666667,-79.135833333333

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.

Amphibole	Andalusite	Baryte	Braunite	Calcite	Chalcopyrite	Chloritoid	Clay	Clinozoisite	Copper
Corundum	Covellite	Diaspore	Epidote	Feldspar	Kaolinite	Lazulite	Malachite	Mica	None
Not in a structural group	Pyrite	Pyrophyllite	Quartz	Rocksalt	Rutile	Spinel	Talc	Titanite	Topaz
Wavellite	Zircon

Actinolite ()*	Albite ()*	Alunite ()*	Andalusite ()*	Azurite ()*
Baryte ()*	Braunite ()*	Cacoxenite ()*	Calcite ()*	Celestine ()*
Chalcocite ()*	Chalcopyrite ()*	Chloritoid ()*	Copper ()*	Covellite ()*
Diaspore ()*	Epidote ()*	Gold ()*	Halite ()*	Hematite ()*
Kaolinite ()*	Kyanite ()*	Lazulite ()*	Magnetite ()*	Malachite ()*
Microcline ()*	Muscovite ()*	Orthoclase ()*	Pyrite ()*	Pyrophyllite ()*
Quartz ()*	Rutile ()*	Strengite ()*	Talc ()*	Titanite ()*
Topaz ()*	Wavellite ()*	Zircon ()*	Zunyite ()*

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 Cl Cu F Fe H K Mg Mn Na O P S Si Sr Ti Zr

Elements from minerals reported directly at this locality: Al Ca Cl K Na O Si Ti Zr

Structural Groups for minerals in this locality:
Amphibole Andalusite Baryte Braunite Calcite Chalcopyrite Chloritoid Clay Clinozoisite Copper
Corundum Covellite Diaspore Epidote Feldspar Kaolinite Lazulite Malachite Mica None
Not in a structural group Pyrite Pyrophyllite Quartz Rocksalt Rutile Spinel Talc Titanite Topaz
Wavellite Zircon

39 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			1	252300	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	252300	8803
Alunite ()*	None	KAl₃(SO₄)₂(OH)₆			1	252320	966
Andalusite ()*	Andalusite	Al₂SiO₅			4	252316,252320,252321,252341	1310
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			1	252310	5509
Baryte ()*	Baryte	Ba(SO₄)			2	252319,252322	11547
Braunite ()*	Braunite	Mn²⁺Mn³⁺₆O₈(SiO₄)			1	252322	483
Cacoxenite ()*	None	Fe³⁺₂₄AlO₆(PO₄)₁₇(OH)₁₂·75H₂O			1	252320	280
Calcite ()*	Calcite	Ca(CO₃)			2	252300,252317	27770
Celestine ()*	Baryte	Sr(SO₄)			1	252317	1252
Chalcocite ()*	None	Cu₂S			2	252310,252331	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			3	252310,252331,252340	27198
Chloritoid ()*	Chloritoid	Fe²⁺Al₂O(SiO₄)(OH)₂			2	252317,252329	376
Copper ()*	Copper	Cu			1	252310	3846
Covellite ()*	Covellite	CuS			2	252308,252331	4165
Diaspore ()*	Diaspore	AlO(OH)			1	252316	481
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			2	252300,252317	8173
Gold ()*	Copper	Au			10	252301,252307,252308,252314,252331,252332,252335,252337,252338,252343	30554
Halite ()*	Rocksalt	NaCl	705.12	675.12	0		1398
Hematite ()*	Corundum	Fe₂O₃			4	252304,252317,252331,252343	14640
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			2	252317,252322	5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄			1	252321	1507
Lazulite ()*	Lazulite	MgAl₂(PO₄)₂(OH)₂			1	252320	232
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			2	252304,252315	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	252310	12537
Microcline ()*	Feldspar	K(AlSi₃O₈)	705.12	675.12	0		4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			8	252306,252316,252317,252322,252323,252328,252340,252341	17380
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	705.12	675.12	0		2349
Pyrite ()*	Pyrite	FeS₂			12	252301,252308,252310,252314,252315,252317,252331,252339,252340,252341,252342,252343	39462
Pyrophyllite ()*	Clay Pyrophyllite	Al₂Si₄O₁₀(OH)₂			12	252306,252316,252318,252320,252322,252323,252325,252328,252329,252333,252336,252341	771
Quartz ()*	Quartz	SiO₂			14	252301,252304,252306,252308,252310,252317,252322,252323,252328,252331,252339,252340,252341,252342	61156
Rutile ()*	Rutile	TiO₂			1	252317	5614
Strengite ()*	None	Fe³⁺(PO₄)·2H₂O			1	252320	263
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			5	252318,252325,252326,252333,252336	3337
Titanite ()*	Titanite	CaTi(SiO₄)O	705.12	675.12	0		4899
Topaz ()*	Topaz	Al₂SiO₄F₂			3	252316,252320,252322	1476
Wavellite ()*	Wavellite	Al₃(PO₄)₂(OH)₃·5H₂O			1	252320	374
Zircon ()*	Zircon	Zr(SiO₄)	705.12	675.12	0		5251
Zunyite ()*	None	Al₁₃Si₅O₂₀(OH,F)₁₈Cl			1	252320	86

2 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
	USGS-Rb-Sr-02764	705.12	675.12	690.12±15	Rb-Sr			whole rock							225953	Chapel Hill, Orange Co., North Carolina, USA		USGS-Rb-Sr		USGS-Rb-Sr
	USGS-Rb-Sr-02766	705.12	675.12	690.12±15	Rb-Sr			whole rock							225953	Chapel Hill, Orange 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...