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:
Acra Ni Prospect, Kurnalpi Goldfield, Kalgoorlie-Boulder Shire, Western Australia, Australia

Oldest recorded age at locality: 2680
Youngest recorded age at locality: 2600

mindat Locality ID: 122817
mindat URL: http://www.mindat.org/loc-122817.html

Tectonic Settings:

Total number of sublocalities beneath "Acra Ni Prospect, Kurnalpi Goldfield, Kalgoorlie-Boulder Shire, Western Australia, Australia": 0
Total number of bottom-level sublocalities: 0

Latitude: 30°32'6"S
Longitude: 122°5'16"E
Decimal Degree (lat, lon): -30.535,122.08777777778

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.

Amphibole	Calcite	Chalcopyrite	Millerite	Nickeline	None	Pyrite	Quartz	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: C Co Cu Fe H Mg Ni O S Si

Elements from minerals reported directly at this locality: C Co Cu Fe H Mg Ni O S Si

Structural Groups for minerals in this locality:
Amphibole Calcite Chalcopyrite Millerite Nickeline None Pyrite Quartz Spinel

9 IMA Minerals at location:

Anthophyllite ()*	Chalcopyrite ()*	Magnesite ()*	Magnetite ()*	Millerite ()*
Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Siegenite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Anthophyllite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂	2680	2600	718
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	2680	2600	27198
Magnesite ()*	Calcite	Mg(CO₃)	2680	2600	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	2680	2600	14899
Millerite ()*	Millerite	NiS	2680	2600	1066
Pyrite ()*	Pyrite	FeS₂	2680	2600	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	2680	2600	9056
Quartz ()*	Quartz	SiO₂	2680	2600	61156
Siegenite ()*	Spinel	CoNi₂S₄	2680	2600	249

2 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
	EG90_845-00003	2678	2670	2674±4	Pb-Pb			zircon			Yes	Zircon			223	Kalgoorlie-Boulder Shire, Western Australia, Australia		Kent and McDougall (1995)	10.2113/gsecongeo.90.4.845	EG90_845
	Hg-00117	2680	2600		Ar-Ar, U-Pb		high				Yes		Coloradoite	Hg	223	Kalgoorlie-Boulder Shire, Western Australia, Australia		Kent and McDougall (1995)	10.2113/gsecongeo.90.4.845	EG90_845

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...