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:
Rock Creek District, Baker Co., Oregon, USA

Oldest recorded age at locality: 166
Youngest recorded age at locality: 127

mindat Locality ID: 54015
mindat URL: http://www.mindat.org/loc-54015.html

Tectonic Settings:

Total number of sublocalities beneath "Rock Creek District, Baker Co., Oregon, USA": 37
Total number of bottom-level sublocalities: 37

Number of Child Localities: 37
Child Localities:
Afterthought Claims
Antone Creek Prospect
Baisley-Elkhorn Mine
Black Crow Occurrence
Brooklyn Occurrence (Highline Mine)
Chemical Lime Company Deposit
Chloride Occurrence
Copperdown Occurrence (Camperdown)
Cub (Black Bear; Excuse)
Denny Group
Dolcoatte Occurrence
Elkhorn Bonanza Occurrence (Elkhorn Consolidated Mining Company)
F. F. Johnson Claims (Mountain View)
Gold Prospect (Bottom Claim; MRDS - 10033409)
Gold Prospect (MRDS - 10036544)
Gold Prospect (MRDS - 10036549)
Highland Mine
Hurdy Gurdy Mine
Iowa Occurrence
Iron King Occurrence
Jim Blaine Occurrence (Platt Group)
Kelly Occurrence
Maxwell Mine
McColloch Group
Meadon Lake Prospect (North Powder Molybdenum)
Midas Occurrence
Miners Hope (Part Of The Baisley-Elkhorn Group)
Missouri Occurrence (Part Of The Baisley-Elkhorn Group)
Molybdenite Occurrence (MRDS - 10036688)
Pearl Mine
Pine Creek Uranium Occurrence
Price Anderson Group
Robbins Elkhorn Mine
Tungsten Occurrence
Unnamed Gold Prospect (MRDS - 10200804)
Western Union
Wright And Van Mead Occurrence (Model; Mammoth And Silver Tip Claims)

Latitude: 44°52'9"N
Longitude: 118°7'15"W
Decimal Degree (lat, lon): 44.869166666667,-118.12083333333

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.

Acanthite	Arsenopyrite	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Epidote	Mica	Molybdenite
None	Pyrite	Quartz	Rocksalt	Scheelite	Sphalerite	Tetrahedrite

Acanthite ()*	Ankerite ()*	Arsenopyrite ()*	Bornite ()*	Calcite ()*
Chalcopyrite ()*	Epidote ()*	Ferrimolybdite ()*	Galena ()*	Gold ()*
Molybdenite ()*	Muscovite ()*	Powellite ()*	Pyrargyrite ()*	Pyrite ()*
Quartz ()*	Siderite ()*	Sphalerite ()*	Tetrahedrite-(Zn) ()*

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 As Au C Ca Cu Fe H K Mo O Pb S Sb Si Zn

Elements from minerals reported directly at this locality: Ag Au S Sb

Structural Groups for minerals in this locality:
Acanthite Arsenopyrite Calcite Chalcopyrite Clay Clinozoisite Copper Epidote Mica Molybdenite
None Pyrite Quartz Rocksalt Scheelite Sphalerite Tetrahedrite

19 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
Acanthite ()*	Acanthite	Ag₂S			1	255465	2793
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂			1	255479	3092
Arsenopyrite ()*	Arsenopyrite	FeAsS			2	255475,255481	9052
Bornite ()*	None	Cu₅FeS₄			1	255483	5516
Calcite ()*	Calcite	Ca(CO₃)			6	255461,255465,255467,255475,255481,255483	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			6	255460,255461,255465,255475,255481,255483	27198
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			1	255483	8173
Ferrimolybdite ()*	None	Fe³⁺₂(Mo⁶⁺O₄)₃·7H₂O			1	255483	345
Galena ()*	Rocksalt	PbS			9	255459,255460,255461,255465,255472,255475,255480,255481,255494	24243
Gold ()*	Copper	Au	166	127	0		30554
Molybdenite ()*	Molybdenite	MoS₂			2	255483,255487	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			3	255461,255481,255483	17380
Powellite ()*	Scheelite	Ca(MoO₄)			1	255492	494
Pyrargyrite ()*	None	Ag₃SbS₃	166	127	0		1425
Pyrite ()*	Pyrite	FeS₂			13	255460,255461,255462,255465,255467,255472,255475,255478,255479,255480,255481,255494,255495	39462
Quartz ()*	Quartz	SiO₂			10	255460,255461,255465,255467,255472,255475,255479,255481,255483,255495	61156
Siderite ()*	Calcite	Fe(CO₃)			1	255481	6417
Sphalerite ()*	Sphalerite	ZnS			5	255461,255465,255472,255475,255481	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			5	255460,255465,255475,255480,255481	5317

5 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-Rb-Sr-03596	164	130	147±17	Rb-Sr		whole rock	150337	Midas Occurrence, Rock Creek District, Baker Co., Oregon, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03597	166	150	158±8	Rb-Sr	age of intrusion	whole rock	150337	Midas Occurrence, Rock Creek District, Baker Co., Oregon, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03598	151.93	137.93	144.93±7	Rb-Sr		whole rock	150337	Midas Occurrence, Rock Creek District, Baker Co., Oregon, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03622	139	127	133±6	Rb-Sr	initial age disturbed by later metamorphism	whole rock	150337	Midas Occurrence, Rock Creek District, Baker Co., Oregon, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03623	139	127	133±6	Rb-Sr	initial age disturbed by later metamorphism	biotite	150337	Midas Occurrence, Rock Creek District, Baker Co., Oregon, USA	USGS-Rb-Sr	USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...