Mineral Evolution Database

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

Mineral locality data provided by mindat.org

Important Update News

The RRUFF Project has been migrated to RRUFF.net. Please update your bookmarks immediately, if you have not done so.

The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.

We are grateful to NASA for the funding of this effort.

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:
Kofa Game Range, Kofa District, Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA

mindat Locality ID: 274759
mindat URL: http://www.mindat.org/loc-274759.html

Tectonic Settings:

Total number of sublocalities beneath "Kofa Game Range, Kofa District, Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA": 18
Total number of bottom-level sublocalities: 15

Number of Child Localities: 8
Child Localities:
King Of Arizona Mine (King Of Arizona Property; King Of Arizona Group Of Claims; King Of Arizona Vein; Kofa Mine; Gleason Mine; Homestake Claim)
King Of Arizona Mine Area
Kofa Butte
Kofa Gold Placers (S.H. Placers)
Midnight Mine (Hamilton Mine)
North Star Mine (Northstar Mine)
Parker Claim
Unnamed Fluorspar Occurrence

Latitude: 33°16'41"N
Longitude: 113°56'27"W
Decimal Degree (lat, lon): 33.278055555556,-113.94083333333

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.

Amorphous	Baryte	Bixbyite	Calcite	Clay	Clinozoisite	Copper	Diaspore	Epidote	Fluorite
Mica	None	Phenakite	Polybasite	Pyrite	Quartz	Ramsdellite	Rutile	Scheelite

Aurorite ()*	Baryte ()*	Bixbyite ()*	Boulangerite ()*	Calcite ()*
Chalcophanite ()*	Epidote ()*	Fluorite ()*	Gold ()*	Groutite ()*
Manganite ()*	Muscovite ()*	Nsutite ()*	Opal ()*	Polybasite ()*
Pyrite ()*	Pyrolusite ()*	Quartz ()*	Rhodochrosite ()*	Scheelite ()*
Silver ()*	Todorokite ()*	Willemite ()*

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 Ba C Ca Cu F Fe H K Mg Mn Na O Pb S Sb Si Sr W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Baryte Bixbyite Calcite Clay Clinozoisite Copper Diaspore Epidote Fluorite
Mica None Phenakite Polybasite Pyrite Quartz Ramsdellite Rutile Scheelite

23 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Aurorite ()*	None	Mn²⁺Mn⁴⁺₃O₇·3H₂O	1	149396	22
Baryte ()*	Baryte	Ba(SO₄)	1	149410	11547
Bixbyite ()*	Bixbyite	Mn³⁺₂O₃	3	149398,149410,149411	104
Boulangerite ()*	None	Pb₅Sb₄S₁₁	1	149410	843
Calcite ()*	Calcite	Ca(CO₃)	2	149396,149413	27770
Chalcophanite ()*	None	ZnMn⁴⁺₃O₇·3H₂O	1	149396	197
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1	149410	8173
Fluorite ()*	Fluorite	CaF₂	4	149396,149400,149410,149413	9617
Gold ()*	Copper	Au	6	149396,149397,149404,149408,149409,149410	30554
Groutite ()*	Diaspore	Mn³⁺O(OH)	3	149398,149399,149411	72
Manganite ()*	Rutile	Mn³⁺O(OH)	2	149398,149411	770
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1	149406	17380
Nsutite ()*	Ramsdellite	Mn²⁺_xMn⁴⁺_1-xO_2-2x(OH)_2x	1	149399	121
Opal ()*	Amorphous	SiO₂·nH₂O	1	149396	2994
Polybasite ()*	Polybasite	[Ag₉CuS₄][(Ag,Cu)₆(Sb,As)₂S₇]	1	149396	716
Pyrite ()*	Pyrite	FeS₂	1	149410	39462
Pyrolusite ()*	Rutile	MnO₂	1	149396	3106
Quartz ()*	Quartz	SiO₂	2	149396,149410	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)	1	149410	1711
Scheelite ()*	Scheelite	Ca(WO₄)	2	149404,149409	4894
Silver ()*	Copper	Ag	1	149410	5186
Todorokite ()*	None	(Na,Ca,K,Ba,Sr)_1-x(Mn,Mg,Al)₆O₁₂·3-4H₂O	3	149396,149398,149411	433
Willemite ()*	Phenakite	Zn₂SiO₄	1	149396	303

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...