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), La Paz Co., Arizona, USA

Oldest recorded age at locality: 24.22
Youngest recorded age at locality: 17.89

mindat Locality ID: 192385
mindat URL: http://www.mindat.org/loc-192385.html

Tectonic Settings:

Total number of sublocalities beneath "Kofa Mts (S.H. Mts), La Paz Co., Arizona, USA": 12
Total number of bottom-level sublocalities: 8

Number of Child Localities: 1
Child Localities:
Alamo Springs District

Latitude: 33°25'45"N
Longitude: 113°53'12"W
Decimal Degree (lat, lon): 33.429166666667,-113.88666666667

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	Calcite	Clay	Clinozoisite	Copper	Epidote	Malachite	Mica	None	Pyrophyllite
Spinel

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: Al Au C Ca Cu Fe H K O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Calcite Clay Clinozoisite Copper Epidote Malachite Mica None Pyrophyllite
Spinel

8 IMA Minerals at location:

Calcite ()*	Chrysocolla ()*	Epidote ()*	Gold ()*	Magnetite ()*
Malachite ()*	Muscovite ()*	Pyrophyllite ()*

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
Calcite ()*	Calcite	Ca(CO₃)	24.22	17.89	1	140406	27770
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	24.22	17.89	1	140408	3531
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	24.22	17.89	1	140403	8173
Gold ()*	Copper	Au	24.22	17.89	1	140406	30554
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	24.22	17.89	1	140403	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	24.22	17.89	1	140408	12537
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	24.22	17.89	1	140403	17380
Pyrophyllite ()*	Clay Pyrophyllite	Al₂Si₄O₁₀(OH)₂	24.22	17.89	1	140399	771

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
Giersdorf_00000398	24.22	22.98	23.6±0.62	K-Ar		UAKA-73-18	192385	Kofa Mts (S.H. Mts), La Paz Co., Arizona, USA	Kofa Butte Quad.	Shafiqullah et al. (1980)	AGSD12_201
Giersdorf_00000403	22.25	21.11	21.68±0.57	K-Ar		UAKA-73-19	192385	Kofa Mts (S.H. Mts), La Paz Co., Arizona, USA	Kofa Butte Quad.	Shafiqullah et al. (1980)	AGSD12_201
Giersdorf_00000430	18.73	17.89	18.31±0.42	K-Ar	Age records the minimum age of tilting of Kofa Mountain features	UAKA-73-108	192385	Kofa Mts (S.H. Mts), La Paz Co., Arizona, USA	Kofa Mountains	Shafiqullah et al. (1980)	AGSD12_201

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...