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:
Alahambra Mining District (Golconda Mining District), Jefferson Co., Montana, USA

Oldest recorded age at locality: 38.93
Youngest recorded age at locality: 34.55

mindat Locality ID: 186108
mindat URL: http://www.mindat.org/loc-186108.html

Tectonic Settings:

Total number of sublocalities beneath "Alahambra Mining District (Golconda Mining District), Jefferson Co., Montana, USA": 25
Total number of bottom-level sublocalities: 25

Number of Child Localities: 25
Child Localities:
Anderson Gulch Prospect
Beaverton Cu Deposit
Beaverton Prospect
Beaverton Ranch Occurrence
Big Chief Mine Golconda
Big Timber Mine
Blackjack Occurrence
Bo Gulch (Bull Gulch)
Buckeye
Copper Gulch Prospect
Copper Nugget Placer
Elkhorn Peak Iron (Iron Mine)
Elkhorn Ridge Prospect
Golconda Mine (Golden Assets)
Helena-Jefferson Mine (Hog Mine)
J. C. Copper Claim
Kyler Silica Deposit
Lion Mine
Little Tizer Wildcat Mine
Madison Mine (Black Rock)
Ohio Claim
Silver Tip Mine (Reddings Mine)
Solar Silver Mine
West Fork Anderson Gulch Prospect
Wildcat & Line Occurrence

Latitude: 46°20'18"N
Longitude: 111°58'37"W
Decimal Degree (lat, lon): 46.338333333333,-111.97694444444

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.

Baryte	Calcite	Chalcopyrite	Copper	Molybdenite	None	Pyrite	Quartz	Rhodonite	Rocksalt
Sphalerite	Stibnite

Alabandite ()*	Anglesite ()*	Calcite ()*	Chalcopyrite ()*	Copper ()*
Galena ()*	Gold ()*	Molybdenite ()*	Pyrite ()*	Quartz ()*
Rhodochrosite ()*	Rhodonite ()*	Sphalerite ()*	Stibnite ()*

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 Fe Mn Mo O Pb S Sb Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Baryte Calcite Chalcopyrite Copper Molybdenite None Pyrite Quartz Rhodonite Rocksalt
Sphalerite Stibnite

14 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
Alabandite ()*	Rocksalt	MnS			1	228997	312
Anglesite ()*	Baryte	Pb(SO₄)			1	229004	2734
Calcite ()*	Calcite	Ca(CO₃)			1	228997	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	38.93	34.55	3	228984,228987,228997	27198
Copper ()*	Copper	Cu			1	228993	3846
Galena ()*	Rocksalt	PbS			6	228987,228990,228996,228997,229002,229004	24243
Gold ()*	Copper	Au			4	228987,228996,229002,229004	30554
Molybdenite ()*	Molybdenite	MoS₂	38.93	34.55	2	228984,228997	5800
Pyrite ()*	Pyrite	FeS₂	38.93	34.55	4	228984,228987,228997,229004	39462
Quartz ()*	Quartz	SiO₂			6	228987,228996,228997,228999,229002,229004	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)			2	228990,228997	1711
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)			1	228997	969
Sphalerite ()*	Sphalerite	ZnS			5	228987,228990,228996,228997,229004	21482
Stibnite ()*	Stibnite	Sb₂S₃			1	228987	3418

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
	PorphCu-00680	38.93	34.55	38.36±0.57 – 35.98±1.43									Chalcopyrite, Molybdenite, Pyrite	Cu	208399	Beaverton Cu Deposit, Alahambra Mining District (Golconda Mining District), Jefferson Co., Montana, USA	Beavertown	Singer et al. (2008)		USGSOFR2008_1155

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...