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:
Letha Lee Prospect, Gem Park Complex, Fremont Co., Colorado, USA

Oldest recorded age at locality: 551
Youngest recorded age at locality: 551

mindat Locality ID: 113032
mindat URL: http://www.mindat.org/loc-113032.html

Tectonic Settings:

Total number of sublocalities beneath "Letha Lee Prospect, Gem Park Complex, Fremont Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°16'10"N
Longitude: 105°33'52"W
Decimal Degree (lat, lon): 38.269444444444,-105.56444444444

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.

Aragonite	Baryte	Calcite	Clay	None	Smectite-vermiculite

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 Ba C Ca Fe H Mg O S Si Sr

Elements from minerals reported directly at this locality: Al Ba C Ca Fe H Mg O S Si Sr

Structural Groups for minerals in this locality:
Aragonite Baryte Calcite Clay None Smectite-vermiculite

5 IMA Minerals at location:

Baryte ()*	Calcite ()*	Dolomite ()*	Strontianite ()*	Vermiculite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Baryte ()*	Baryte	Ba(SO₄)	551	551	11547
Calcite ()*	Calcite	Ca(CO₃)	551	551	27770
Dolomite ()*	None	CaMg(CO₃)₂	551	551	9895
Strontianite ()*	Aragonite	Sr(CO₃)	551	551	589
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O	551	551	652

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000904	MAGMATIC STYLE: Dykes and small plug (Pine Creek). ASSOCIATED SILICATE ROCKS: Pyroxenite, gabbro, nepheline syenite, lamprophyre, fenite.

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
	Jen_0000904	551	551	551	K-Ar			riebeckite			Yes	Riebeckite			24296	Gem Park Complex, Fremont Co., Colorado, USA	Gem Park	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...