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:
Masonville District, Larimer Co., Colorado, USA

Oldest recorded age at locality: 1410.67
Youngest recorded age at locality: 1310.67

mindat Locality ID: 115531
mindat URL: http://www.mindat.org/loc-115531.html

Tectonic Settings:

Total number of sublocalities beneath "Masonville District, Larimer Co., Colorado, USA": 20
Total number of bottom-level sublocalities: 19

Number of Child Localities: 19
Child Localities:
Big Four Mine
Buckhorn
Buckhorn Box Canyon
Buckhorn Gulch
Buckhorn Gulch (1)
Buckhorn Gulch (2)
Carter Mine (Carter Tunnel)
Colorado Stone Company Pit
Estes Belle And Hilltop Claims
Lone Pine Mine (Golden Reward; Morning Star; Hurrah No. 2; Urrah; Golden Glory; Unpatented Claims: Lone Pine)
Mason Mine (Mason Ranch Mine)
Masonville (Carter Mine)
Mint Quarry
Redstone Loveland
Troupe
Unknown Stone Occurrence (MRDS - 10016706)
Weaver
White Quarry
Yellow Jacket Group (Unpatented Claims: Copper King; Bismark; Yellow Jacket; Gold Dust; Lucky Star; Strang; Bismark Extension)

Latitude: 40°29'41"N
Longitude: 105°12'37"W
Decimal Degree (lat, lon): 40.494722222222,-105.21027777778

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.

Andalusite	Chalcopyrite	Chlorite	Clay	Clinozoisite	Copper	Corundum	Epidote	Malachite	None
Not in a structural group	Pyrite	Quartz	Scheelite	Smectite-vermiculite	Staurolite

Andalusite ()*	Chalcopyrite ()*	Clinochlore ()*	Epidote ()*	Gold ()*
Hematite ()*	Malachite ()*	Montmorillonite ()*	Pyrite ()*	Quartz ()*
Scheelite ()*	Sillimanite ()*	Staurolite ()*

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 C Ca Cu Fe H Mg Na O S Si W

Elements from minerals reported directly at this locality: C Cu H O

Structural Groups for minerals in this locality:
Andalusite Chalcopyrite Chlorite Clay Clinozoisite Copper Corundum Epidote Malachite None
Not in a structural group Pyrite Quartz Scheelite Smectite-vermiculite Staurolite

13 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
Andalusite ()*	Andalusite	Al₂SiO₅			2	191923,191924	1310
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			2	191922,191925	27198
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈			2	191923,191924	1756
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			1	191929	8173
Gold ()*	Copper	Au			1	191925	30554
Hematite ()*	Corundum	Fe₂O₃			2	191925,191929	14640
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	1410.67	1310.67	0		12537
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O			1	191929	1508
Pyrite ()*	Pyrite	FeS₂			1	191929	39462
Quartz ()*	Quartz	SiO₂			3	191922,191925,191929	61156
Scheelite ()*	Scheelite	Ca(WO₄)			2	191925,191929	4894
Sillimanite ()*	Not in a structural group	Al₂SiO₅			2	191923,191924	1516
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			1	191920	978

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
	USGS-Rb-Sr-04137	1410.67	1310.67	1360.67±50	Rb-Sr	minimum age of intrusion		biotite							115536	Mint Quarry, Masonville District, Larimer Co., Colorado, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...