Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Maginnis Mine (Oro Cache Mine), Warm Springs District (Gilt Edge District; Gold Hill District; Maiden District), Fergus Co., Montana, USA

Oldest recorded age at locality: 73.3
Youngest recorded age at locality: 53.7

mindat Locality ID: 163061
mindat URL: http://www.mindat.org/loc-163061.html

Tectonic Settings:

Total number of sublocalities beneath "Maginnis Mine (Oro Cache Mine), Warm Springs District (Gilt Edge District; Gold Hill District; Maiden District), Fergus Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 47°10'36"N
Longitude: 109°13'8"W
Decimal Degree (lat, lon): 47.176666666667,-109.21888888889

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.

Fluorite	Melonite	Mica	None	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: Ag Al Au Ca F H K O Pb S Si Te V

Elements from minerals reported directly at this locality: Ag Al Au Ca F H K O Pb S Si Te V

Structural Groups for minerals in this locality:
Fluorite Melonite Mica None Rocksalt

5 IMA Minerals at location:

Calaverite ()*	Fluorite ()*	Galena ()*	Roscoelite ()*	Sylvanite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Calaverite ()*	Melonite	AuTe₂	73.3	53.7	361
Fluorite ()*	Fluorite	CaF₂	73.3	53.7	9617
Galena ()*	Rocksalt	PbS	73.3	53.7	24243
Roscoelite ()*	Mica	KV³⁺₂(Si₃Al)O₁₀(OH)₂	73.3	53.7	253
Sylvanite ()*	Melonite	AgAuTe₄	73.3	53.7	337

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
	Hg-00101	73.3	53.7		K-Ar, F.T.						Yes		Imiterite	Hg	50255	Warm Springs District (Gilt Edge District; Gold Hill District; Maiden District), Fergus Co., Montana, USA		Marvin et al. (1980); Zhang and Spry (1994)

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...