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:
Boswedden Mine (incl. Wheal Praze; Wheal Williams; Yankee Boy Mine), Kenidjack Valley, St Just, Cornwall, England, UK

Oldest recorded age at locality: 270
Youngest recorded age at locality: 100

mindat Locality ID: 1284
mindat URL: http://www.mindat.org/loc-1284.html

Tectonic Settings:

Total number of sublocalities beneath "Boswedden Mine (incl. Wheal Praze; Wheal Williams; Yankee Boy Mine), Kenidjack Valley, St Just, Cornwall, England, UK": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Wheal Call (Wheal Cole; Wheal Coal)
Wheal Castle

Latitude: 50°7'49"N
Longitude: 5°42'5"W
Decimal Degree (lat, lon): 50.130277777778,-5.7013888888889

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.

Apatite	Arsenopyrite	Beryl	Brochantite	Calcite	Chalcopyrite	Connellite	Copper	Corundum	Diaspore
Lepidocrocite	Malachite	None	Pyrite	Quartz	Rutile	Topaz

Arsenopyrite ()*	Beryl ()*	Bornite ()*	Brochantite ()*	Calcite ()*
Cassiterite ()*	Chalcocite ()*	Chalcopyrite ()*	Connellite ()*	Copper ()*
Dolomite ()*	Fluorapatite ()*	Goethite ()*	Hematite ()*	Langite ()*
Lepidocrocite ()*	Malachite ()*	Pyrite ()*	Quartz ()*	Siderite ()*
Topaz ()*

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 As Be C Ca Cl Cu F Fe H Mg O P S Si Sn

Elements from minerals reported directly at this locality: Al F O Si

Structural Groups for minerals in this locality:
Apatite Arsenopyrite Beryl Brochantite Calcite Chalcopyrite Connellite Copper Corundum Diaspore
Lepidocrocite Malachite None Pyrite Quartz Rutile Topaz

21 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
Arsenopyrite ()*	Arsenopyrite	FeAsS	270	100	2	118833,118834	9052
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	270	100	1	118834	4286
Bornite ()*	None	Cu₅FeS₄	270	100	1	118833	5516
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	270	100	1	118834	1633
Calcite ()*	Calcite	Ca(CO₃)	270	100	1	118834	27770
Cassiterite ()*	Rutile	SnO₂	270	100	2	118833,118834	5171
Chalcocite ()*	None	Cu₂S	270	100	2	118833,118834	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	270	100	2	118833,118834	27198
Connellite ()*	Connellite	Cu₃₆(SO₄)(OH)₆₂Cl₈·6H₂O	270	100	2	118833,118834	295
Copper ()*	Copper	Cu	270	100	1	118833	3846
Dolomite ()*	None	CaMg(CO₃)₂	270	100	1	118834	9895
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	270	100	1	118834	2740
Goethite ()*	Diaspore	FeO(OH)	270	100	2	118833,118834	7437
Hematite ()*	Corundum	Fe₂O₃	270	100	2	118833,118834	14640
Langite ()*	None	Cu₄(SO₄)(OH)₆·2H₂O	270	100	2	118833,118834	593
Lepidocrocite ()*	Lepidocrocite	Fe³⁺O(OH)	270	100	1	118833	581
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	270	100	2	118833,118834	12537
Pyrite ()*	Pyrite	FeS₂	270	100	1	118834	39462
Quartz ()*	Quartz	SiO₂	270	100	2	118833,118834	61156
Siderite ()*	Calcite	Fe(CO₃)	270	100	2	118833,118834	6417
Topaz ()*	Topaz	Al₂SiO₄F₂	270	100	0		1476

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
	Lucy_081	270	100	270-100	40Ar - 39Ar	Lodes post-dating elvan intrusion and primary mineralization.					Yes				1265	St Just, Cornwall, England, UK	St Just	Hawkes et al. (1978		US4_51	Possibility of hydrothermal degassing of lode material around 210 Ma and 215 Ma which overprints a primary formation age of roughly 270 Ma. New mineral growth may have occurred close to 165 Ma with further hydrothermal activity at about 100 Ma. Adularia from veins in the Lizard Complex also provides indication

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...