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:
Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA

Oldest recorded age at locality: 1458.93
Youngest recorded age at locality: 1272.15

mindat Locality ID: 115491
mindat URL: http://www.mindat.org/loc-115491.html

Tectonic Settings:

Total number of sublocalities beneath "Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 40°24'55"N
Longitude: 105°22'26"W
Decimal Degree (lat, lon): 40.415277777778,-105.37388888889

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.

Beryl	Clay	Mica	None

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 Be H K O Si

Elements from minerals reported directly at this locality: Al Be H K O Si

Structural Groups for minerals in this locality:
Beryl Clay Mica None

2 IMA Minerals at location:

Beryl ()*	Muscovite ()*

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
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	1458.93	1272.15	0		4286
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1458.93	1346.46	0		17380

9 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-Rb-Sr-04180	1312.15	1272.15	1292.15±20	Rb-Sr		whole rock		115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04181	1312.15	1272.15	1292.15±20	Rb-Sr		biotite		115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04182	1386.46	1346.46	1366.46±20	Rb-Sr		muscovite	Muscovite	115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04183	1386.46	1346.46	1366.46±20	Rb-Sr		microcline	Microcline	115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04184	1386.46	1346.46	1366.46±20	Rb-Sr		plagioclase		115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04185	1380.67	1340.67	1360.67±20	Rb-Sr	age of intrusion	plagioclase		115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04186	1380.67	1340.67	1360.67±20	Rb-Sr	age of intrusion	microcline	Microcline	115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04187	1458.93	1418.93	1438.93±20	Rb-Sr	age of intrusion	muscovite	Muscovite	115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain District), Larimer Co., Colorado, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04188	1458.93	1418.93	1438.93±20	Rb-Sr	age of intrusion	biotite		115491	Giant Crystal Mine, Crystal Mountain Pegmatite District (Storm Mountain 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...