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:
Horse Mountain, Coastal Range, Humboldt Co., California, USA

Oldest recorded age at locality: 164
Youngest recorded age at locality: 164

mindat Locality ID: 217425
mindat URL: http://www.mindat.org/loc-217425.html

Tectonic Settings:

Total number of sublocalities beneath "Horse Mountain, Coastal Range, Humboldt Co., California, USA": 9
Total number of bottom-level sublocalities: 9

Number of Child Localities: 9
Child Localities:
Crest Area Of Horse Mountain
Horse Mountain Mine (Copper Glance Mine; Humboldt Copper Mine)
Leaning Tree No. 2 Claim
Lupton Claim
Sweet Home Mine (Ruby Mine)
Unnamed Cr Occurrence (14)
Unspecified Native Copper And Chromite Occurrences
West Side Of Horse Mountain
White Rock Limestone Deposit

Latitude: 40°52'24"N
Longitude: 123°41'59"W
Decimal Degree (lat, lon): 40.873333333333,-123.69972222222

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	Calcite	Chalcopyrite	Clinozoisite	Copper	Epidote	Feldspar	Malachite	None	Not in a structural group
Spinel

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 C Ca Cr Cu Fe H Na O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Calcite Chalcopyrite Clinozoisite Copper Epidote Feldspar Malachite None Not in a structural group
Spinel

11 IMA Minerals at location:

Albite ()*	Bornite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*
Chromite ()*	Chrysocolla ()*	Copper ()*	Cuprite ()*	Epidote ()*
Malachite ()*

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
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	156240	8803
Bornite ()*	None	Cu₅FeS₄	164	164	2	156234,156237	5516
Calcite ()*	Calcite	Ca(CO₃)			1	156240	27770
Chalcocite ()*	None	Cu₂S	164	164	2	156234,156237	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	164	164	1	156234	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄			2	156238,156239	3902
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	164	164	1	156234	3531
Copper ()*	Copper	Cu			2	156237,156239	3846
Cuprite ()*	Not in a structural group	Cu₂O	164	164	2	156234,156237	2970
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			1	156240	8173
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	164	164	1	156234	12537

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
	podchrome-00346	164	164	Middle Jurassic (161-168 Ma)										Cr	76792	Horse Mountain Mine (Copper Glance Mine; Humboldt Copper Mine), Horse Mountain, Coastal Range, Humboldt Co., California, USA	Horse Mountain	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...