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:
K-7 Tunnel, Challis, Bay Horse District, Custer Co., Idaho, USA

Oldest recorded age at locality: 55
Youngest recorded age at locality: 40

mindat Locality ID: 247175
mindat URL: http://www.mindat.org/loc-247175.html

Tectonic Settings:

Total number of sublocalities beneath "K-7 Tunnel, Challis, Bay Horse District, Custer Co., Idaho, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 44°24'9"N
Longitude: 114°18'28"W
Decimal Degree (lat, lon): 44.4025,-114.30777777778

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	Aragonite	Baryte	Brochantite	Calcite	Caledonite	Chalcopyrite	Linarite	Malachite	None
Quartz	Rocksalt

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 Cu Fe H O Pb S Si Zn

Elements from minerals reported directly at this locality: Al C Cu Fe H O Pb S Si Zn

Structural Groups for minerals in this locality:
Allophane Aragonite Baryte Brochantite Calcite Caledonite Chalcopyrite Linarite Malachite None
Quartz Rocksalt

11 IMA Minerals at location:

Anglesite ()*	Brochantite ()*	Caledonite ()*	Cerussite ()*	Chalcopyrite ()*
Chrysocolla ()*	Galena ()*	Linarite ()*	Malachite ()*	Quartz ()*
Smithsonite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Anglesite ()*	Baryte	Pb(SO₄)	55	40	2734
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	55	40	1633
Caledonite ()*	Caledonite	Cu₂Pb₅(SO₄)₃(CO₃)(OH)₆	55	40	359
Cerussite ()*	Aragonite	Pb(CO₃)	55	40	4979
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	55	40	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	55	40	3531
Galena ()*	Rocksalt	PbS	55	40	24243
Linarite ()*	Linarite	CuPb(SO₄)(OH)₂	55	40	987
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	55	40	12537
Quartz ()*	Quartz	SiO₂	55	40	61156
Smithsonite ()*	Calcite	Zn(CO₃)	55	40	2473

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Giersdorf_00000283	Subduction-related Volcanic zone in Central Idaho

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
	Giersdorf_00000283	55	40	55-40	K-Ar						Yes				16147	Challis, Bay Horse District, Custer Co., Idaho, USA	Challis Volcanics	Moye et al. (1988)		GGCSI27_87	Age of the Challis Volcanic field

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...