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:
Middle Fork District, Lemhi Co., Idaho, USA

Oldest recorded age at locality: 50
Youngest recorded age at locality: 40

mindat Locality ID: 278290
mindat URL: http://www.mindat.org/loc-278290.html

Tectonic Settings:

Total number of sublocalities beneath "Middle Fork District, Lemhi Co., Idaho, USA": 31
Total number of bottom-level sublocalities: 30

Number of Child Localities: 13
Child Localities:
Black Bird Occurrence (Blue Bird)
Deckie Prospect
Hetheringtons Hunter Occurrence
Idaho Primitive Area
Langley Bar Placer
Old Johnson Lode Prospect
Parrot Camp Placer
Pole Creek Placer
Reservoir Creek Placer
Survey Creek Bar Placer
Unnamed Silver Prospect (Unknown; MRDS - 10241681)
Wilson Creek Placer
Woolard Creek Placer

Latitude: 45°0'53"N
Longitude: 114°41'6"W
Decimal Degree (lat, lon): 45.014722222222,-114.685

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.

Calcite	Chalcopyrite	Copper	Corundum	Fluorite	Malachite	None	Pyrite	Quartz

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: Au C Ca Cu F Fe H Mg O S Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Chalcopyrite Copper Corundum Fluorite Malachite None Pyrite Quartz

9 IMA Minerals at location:

Calcite ()*	Chalcopyrite ()*	Dolomite ()*	Fluorite ()*	Gold ()*
Ilmenite ()*	Malachite ()*	Pyrite ()*	Quartz ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	1	210044	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1	210050	27198
Dolomite ()*	None	CaMg(CO₃)₂	1	210063	9895
Fluorite ()*	Fluorite	CaF₂	1	210044	9617
Gold ()*	Copper	Au	5	210062,210064,210067,210069,210070	30554
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	5	210062,210064,210067,210069,210070	5433
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	3	210050,210054,210063	12537
Pyrite ()*	Pyrite	FeS₂	3	210050,210054,210063	39462
Quartz ()*	Quartz	SiO₂	4	210044,210050,210054,210063	61156

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
	NAVDAT-42284	50	40	45±5					42284						140617	Simplot Ranch Placer, Idaho Primitive Area, Middle Fork District, Lemhi Co., Idaho, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...