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:
Magnolia District, Boulder Co., Colorado, USA

Oldest recorded age at locality: 65.5
Youngest recorded age at locality: 0

mindat Locality ID: 24262
mindat URL: http://www.mindat.org/loc-24262.html

Tectonic Settings:

Total number of sublocalities beneath "Magnolia District, Boulder Co., Colorado, USA": 43
Total number of bottom-level sublocalities: 41

Number of Child Localities: 41
Child Localities:
American Eagle - Interocean Occurrence
Beggar
Belmont (Graphic; Holy Cross; Tungsten King Occurrence)
Cheyenne (Modoc; Tiger Nos. 1 & 2 Occurrence)
Dun Raven Mine
Fortune Occurrence
Golden Glow
Humbug
India Mine
Kansas City Tunnel
Kekionga Mine
Keystone Mine
Lady Franklin Mine
Little Maud
Lord Byron
Magnolia Mine
Missoula
Molly Gibson
Mountain Lion Mine - Keystone Vein
New Year
Pandora No. 1 & 4 Lode Claims
Park Placer (Congo Chief; Apex; Dominion; American; Josie Mansfield Placer; Don; Rico; Deyling; Enterprise)
Pickwick
Poorman Mine (1)
Power Shaft
Recluse
Rusty Dime
Sac And Fox
Santa Lasaria (Mtn. Mexico; Bravo Occurrence)
Senator Hill And Ophir Veins
Snow Flake
Sylvanite Tunnel
Unknown Gold Occurrence (MRDS - 10017293)
Unknown Gold Occurrence (MRDS - 10017366)
Unknown Gold Occurrence (MRDS - 10091227)
Unknown Gold Occurrence (MRDS - 10091290)
Unknown Gold Occurrence (MRDS - 10091486)
Unknown Silver Occurrence (MRDS - 10017327)
Unnamed Chrysotile Dike
Valley View
Zephyr Occurrence

Latitude: 39°59'44"N
Longitude: 105°24'41"W
Decimal Degree (lat, lon): 39.995555555556,-105.41138888889

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.

Allanite	Calcite	Chalcopyrite	Clinozoisite	Columbite	Copper	Corundum	Diaspore	Epidote	Fluorite
Marcasite	Melonite	Mica	Molybdenite	Nickeline	None	Pyrite	Quartz	Rocksalt	Rutile
Sphalerite	Stibnite	Wurtzite	Zemannite

Allanite-(Ce) ()*	Altaite ()*	Alunite ()*	Calaverite ()*	Calcite ()*
Calomel ()*	Chalcopyrite ()*	Coloradoite ()*	Empressite ()*	Epidote ()*
Ferberite ()*	Ferrotellurite ()*	Fluorite ()*	Goethite ()*	Gold ()*
Hessite ()*	Hübnerite ()*	Ilmenite ()*	Iodargyrite ()*	Keystoneite ()*
Magnolite ()*	Marcasite ()*	Melonite ()*	Mercury ()*	Molybdenite ()*
Paratellurite ()*	Petzite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Rickardite ()*	Roscoelite ()*	Silver ()*	Sphalerite ()*	Stibnite ()*
Sylvanite ()*	Tellurite ()*	Tellurium ()*	Weishanite ()*

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 C Ca Ce Cl Cu F Fe H Hg I K Mg Mn Mo Ni O Pb S Sb Si Te Ti V W Zn

Elements from minerals reported directly at this locality: Ag Al Ca Ce F Fe H I K Mn O Pb S Si Te W

Structural Groups for minerals in this locality:
Allanite Calcite Chalcopyrite Clinozoisite Columbite Copper Corundum Diaspore Epidote Fluorite
Marcasite Melonite Mica Molybdenite Nickeline None Pyrite Quartz Rocksalt Rutile
Sphalerite Stibnite Wurtzite Zemannite

39 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Allanite-(Ce) ()*	Allanite Epidote	CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)	65.5	0		706
Altaite ()*	Rocksalt	PbTe	65.5	0		489
Alunite ()*	None	KAl₃(SO₄)₂(OH)₆	65.5	0		966
Calaverite ()*	Melonite	AuTe₂	65.5	5	184930,184931,184932,184938,184943	361
Calcite ()*	Calcite	Ca(CO₃)	65.5	1	184959	27770
Calomel ()*	None	HgCl	65.5	1	184943	91
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	65.5	1	184938	27198
Coloradoite ()*	Sphalerite	HgTe	65.5	4	184931,184932,184938,184943	169
Empressite ()*	None	AgTe	65.5	1	184950	43
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	65.5	0		8173
Ferberite ()*	Columbite	Fe²⁺(WO₄)	65.5	2	184921,184930	551
Ferrotellurite ()*	None	Fe(Te⁶⁺O₄) (?)	65.5	1	184931	1
Fluorite ()*	Fluorite	CaF₂	65.5	0		9617
Goethite ()*	Diaspore	FeO(OH)	65.5	1	184931	7437
Gold ()*	Copper	Au	65.5	17	184919,184921,184922,184924,184931,184932,184938,184940,184941,184943,184949,184950,184953,184954,184955,184956,184957	30554
Hessite ()*	None	Ag₂Te	65.5	2	184930,184932	804
Hübnerite ()*	Columbite	Mn²⁺(WO₄)	65.5	0		469
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	65.5	1	184959	5433
Iodargyrite ()*	Wurtzite	AgI	65.5	0		180
Keystoneite ()*	Zemannite	Mg_0.5NiFe³⁺(Te⁴⁺O₃)₃·4H₂O	65.5	2	184931,184938	4
Magnolite ()*	None	Hg¹⁺₂(Te⁴⁺O₃)	65.5	2	184931,184938	3
Marcasite ()*	Marcasite	FeS₂	65.5	0		5674
Melonite ()*	Melonite	NiTe₂	65.5	4	184924,184927,184931,184932	207
Mercury ()*	None	Hg	65.5	3	184931,184938,184943	397
Molybdenite ()*	Molybdenite	MoS₂	65.5	1	184938	5800
Paratellurite ()*	Rutile	TeO₂	65.5	1	184931	20
Petzite ()*	None	Ag₃AuTe₂	65.5	2	184930,184932	409
Pyrite ()*	Pyrite	FeS₂	65.5	4	184924,184930,184931,184938	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	65.5	1	184928	9056
Quartz ()*	Quartz	SiO₂	65.5	5	184921,184924,184930,184931,184938	61156
Rickardite ()*	None	Cu_3-xTe₂	65.5	1	184943	52
Roscoelite ()*	Mica	KV³⁺₂(Si₃Al)O₁₀(OH)₂	65.5	2	184931,184938	253
Silver ()*	Copper	Ag	65.5	5	184931,184940,184941,184949,184958	5186
Sphalerite ()*	Sphalerite	ZnS	65.5	1	184930	21482
Stibnite ()*	Stibnite	Sb₂S₃	65.5	1	184931	3418
Sylvanite ()*	Melonite	AgAuTe₄	65.5	9	184919,184921,184924,184930,184931,184932,184938,184943,184950	337
Tellurite ()*	None	TeO₂	65.5	2	184931,184943	52
Tellurium ()*	None	Te	65.5	4	184923,184924,184931,184938	190
Weishanite ()*	None	(Au,Ag,Hg)	65.5	1	184931	3

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Num	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
Hg-00080	65.5	0		?-?		Calomel, Coloradoite, Magnolite, Mercury	Hg	24262	Magnolia District, Boulder Co., Colorado, USA	Kelly and Goddard (1969)	GSAM109_237
Mo-00187	65.5	0		?-?		Molybdenite	Mo	24262	Magnolia District, Boulder Co., Colorado, USA	Kelly and Goddard (1969)	GSAM109_237
NAVDAT-128206	65	55	60±5		128206			110350	Pandora No. 1 & 4 Lode Claims, Magnolia District, Boulder Co., Colorado, USA	NAVDAT	NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...