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

Oldest recorded age at locality: 21.57
Youngest recorded age at locality: 20.49

mindat Locality ID: 33607
mindat URL: http://www.mindat.org/loc-33607.html

Tectonic Settings:

Total number of sublocalities beneath "Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA": 58
Total number of bottom-level sublocalities: 43

Number of Child Localities: 2
Child Localities:
Alamo Springs District
Kofa District

Latitude: 33°19'41"N
Longitude: 113°58'6"W
Decimal Degree (lat, lon): 33.328055555556,-113.96833333333

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.

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

Aurorite ()*	Baryte ()*	Bixbyite ()*	Boulangerite ()*	Calcite ()*
Chalcophanite ()*	Chrysocolla ()*	Epidote ()*	Fluorite ()*	Galena ()*
Gold ()*	Groutite ()*	Malachite ()*	Manganite ()*	Muscovite ()*
Nsutite ()*	Opal ()*	Polybasite ()*	Pyrite ()*	Pyrolusite ()*
Quartz ()*	Rhodochrosite ()*	Rhodonite ()*	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:
Allophane Amorphous Baryte Bixbyite Calcite Clay Clinozoisite Copper Diaspore Epidote
Fluorite Malachite Mica None Phenakite Polybasite Pyrite Quartz Ramsdellite Rhodonite
Rocksalt Rutile Scheelite

27 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
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)	21.57	20.49	15	149372,149373,149374,149376,149377,149378,149379,149382,149383,149388,149389,149390,149396,149413,149422	27770
Chalcophanite ()*	None	ZnMn⁴⁺₃O₇·3H₂O			1	149396	197
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	21.57	20.49	2	149367,149377	3531
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			1	149410	8173
Fluorite ()*	Fluorite	CaF₂			7	149389,149396,149400,149410,149413,149421,149422	9617
Galena ()*	Rocksalt	PbS			2	149389,149422	24243
Gold ()*	Copper	Au	21.57	20.49	19	149372,149373,149374,149376,149377,149378,149379,149382,149383,149388,149389,149393,149396,149397,149404,149408,149409,149410,149415	30554
Groutite ()*	Diaspore	Mn³⁺O(OH)			3	149398,149399,149411	72
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	21.57	20.49	2	149367,149377	12537
Manganite ()*	Rutile	Mn³⁺O(OH)			3	149390,149398,149411	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			2	149389,149410	39462
Pyrolusite ()*	Rutile	MnO₂			2	149390,149396	3106
Quartz ()*	Quartz	SiO₂	21.57	20.49	8	149372,149374,149377,149378,149379,149383,149396,149410	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)			1	149410	1711
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)			1	149389	969
Scheelite ()*	Scheelite	Ca(WO₄)			3	149404,149409,149418	4894
Silver ()*	Copper	Ag			2	149410,149415	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

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
	Giersdorf_00000406	21.57	20.49	21.03±0.54	K-Ar				UAKA-72-48						33271	Alamo Springs District, Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA	Turtleback Mountain Quad.	Shafiqullah et al. (1980)		AGSD12_201

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...