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:
Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand

Oldest recorded age at locality: 150
Youngest recorded age at locality: 81

mindat Locality ID: 296719
mindat URL: http://www.mindat.org/loc-296719.html

Tectonic Settings:

Total number of sublocalities beneath "Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand": 0
Total number of bottom-level sublocalities: 0

Latitude: 42°1'55"S
Longitude: 171°47'28"E
Decimal Degree (lat, lon): -42.031944444444,171.79111111111

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.

No IMA Minerals occur at this locality according to mindat

7 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	Dated Mineral	Minerals explicitely stated as having this age	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Giersdorf_00000745	127.1	122.9	125±2.1	K-Ar	The age of ~110 Ma records amphibolite facies metamorphism and the beginning of recorded thermal history. This was followed by a period of rapid cooling until ~90 Ma when cooling rates decreased sharply, suggesting an initial period of unroofing followed		hornblende	PSG-11			296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Integrated K-Ar age
Giersdorf_00000746	107.6	104.6	106.1±1.5	K-Ar	The age of ~110 Ma records amphibolite facies metamorphism and the beginning of recorded thermal history. This was followed by a period of rapid cooling until ~90 Ma when cooling rates decreased sharply, suggesting an initial period of unroofing followed		hornblende	PSG-11			296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Isochron K-Ar age
Giersdorf_00000747	98.5	97.9	98.2±0.3	K-Ar	The age of ~110 Ma records amphibolite facies metamorphism and the beginning of recorded thermal history. This was followed by a period of rapid cooling until ~90 Ma when cooling rates decreased sharply, suggesting an initial period of unroofing followed		muscovite	PSG-14	Muscovite	Muscovite	296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Integrated K-Ar age
Giersdorf_00000748	98.2	97.2	97.7±0.5	K-Ar	The age of ~110 Ma records amphibolite facies metamorphism and the beginning of recorded thermal history. This was followed by a period of rapid cooling until ~90 Ma when cooling rates decreased sharply, suggesting an initial period of unroofing followed		muscovite	PSG-14	Muscovite	Muscovite	296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Isochron K-Ar age
Giersdorf_00000749	90	81	90-81	K-Ar	The age spectrum provided by the K-feldspar in the sample is indicative of a rapid cooling		orthoclase	PSG-14	Orthoclase	Orthoclase	296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Age spectrum for K-feldspar
Giersdorf_00000757	150	95	150-95	K-Ar		low	hornblende	SGD-4			296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Age is extracted from the first 15% of the gas released and inconsistent with the result that the remaining 85% of the gas produced.
Giersdorf_00000758	111.8	109.6	110.7±1.1	K-Ar		high	hornblende	SGD-4			296719	Giles Creek Mine, Reefton, Buller District, West Coast Region, New Zealand	Reefton District	Spell et al. (2000)	10.1029/1999TC900046	T19_433	Isochron K-Ar age age is best estimate for closure of th argon system in this mineral

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...