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:
Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK

Oldest recorded age at locality: 365
Youngest recorded age at locality: 235

mindat Locality ID: 4920
mindat URL: http://www.mindat.org/loc-4920.html

Tectonic Settings:

Total number of sublocalities beneath "Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK": 0
Total number of bottom-level sublocalities: 0

Latitude: 54°37'16"N
Longitude: 3°12'7"W
Decimal Degree (lat, lon): 54.621111111111,-3.2019444444444

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.

Aragonite	Beryl	Chalcopyrite	Clay	Mica	None	Pyrite	Rocksalt	Sphalerite

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 C Ca Cu Fe H K Mg O Pb S Si Zn

Elements from minerals reported directly at this locality: Al C Ca Cu Fe H K Mg O Pb S Si Zn

Structural Groups for minerals in this locality:
Aragonite Beryl Chalcopyrite Clay Mica None Pyrite Rocksalt Sphalerite

8 IMA Minerals at location:

Cerussite ()*	Chalcopyrite ()*	Cordierite ()*	Dolomite ()*	Galena ()*
Muscovite ()*	Pyrite ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Cerussite ()*	Aragonite	Pb(CO₃)	365	311	4979
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	365	311	27198
Cordierite ()*	Beryl	Mg₂Al₄Si₅O₁₈	365	311	1008
Dolomite ()*	None	CaMg(CO₃)₂	365	311	9895
Galena ()*	Rocksalt	PbS	365	311	24243
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	365	311	17380
Pyrite ()*	Pyrite	FeS₂	365	311	39462
Sphalerite ()*	Sphalerite	ZnS	365	311	21482

6 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Age from other Locality	Minerals explicitely stated as having this age	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
JGS171_49_001	245	235	245-235	paleomag	age of hematite deposit			Yes	Hematite	25832	Cumbria, England, UK	Cumbria	Crowley et al. (2014)		JGS171_49
Kristen000250	311	311		K-Ar		illite	T1			4920	Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK	Thornthwaite Mine	Ineson and Mitchell (1974)	10.1017/S0016756800041571	GM111_521
Kristen000251	362	362		K-Ar		illite	T2			4920	Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK	Thornthwaite Mine	Ineson and Mitchell (1974)	10.1017/S0016756800041571	GM111_521
Kristen000252	339	339		K-Ar		illite	T3			4920	Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK	Thornthwaite Mine	Ineson and Mitchell (1974)	10.1017/S0016756800041571	GM111_521
Kristen000253	314	314		K-Ar		illite	T4			4920	Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK	Thornthwaite Mine	Ineson and Mitchell (1974)	10.1017/S0016756800041571	GM111_521
Kristen000254	365	365		K-Ar		illite	T5			4920	Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK	Thornthwaite Mine	Ineson and Mitchell (1974)	10.1017/S0016756800041571	GM111_521

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...