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:
Melbur China Clay Pit, Melbur, St Stephen-in-Brannel, Cornwall, England, UK

Oldest recorded age at locality: 268.6
Youngest recorded age at locality: 260.2

mindat Locality ID: 1194
mindat URL: http://www.mindat.org/loc-1194.html

Tectonic Settings:

Total number of sublocalities beneath "Melbur China Clay Pit, Melbur, St Stephen-in-Brannel, Cornwall, England, UK": 0
Total number of bottom-level sublocalities: 0

Latitude: 50°21'49"N
Longitude: 4°55'14"W
Decimal Degree (lat, lon): 50.363611111111,-4.9205555555556

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.

Clay	Cristobalite	Feldspar	Kaolinite	Mica	None	Rutile	Topaz	Tourmaline

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 B F Fe H K Na O Si Sn

Elements from minerals reported directly at this locality: Al B F Fe H K Na O Si Sn

Structural Groups for minerals in this locality:
Clay Cristobalite Feldspar Kaolinite Mica None Rutile Topaz Tourmaline

7 IMA Minerals at location:

Cassiterite ()*	Cristobalite ()*	Kaolinite ()*	Muscovite ()*	Orthoclase ()*
Schorl ()*	Topaz ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Cassiterite ()*	Rutile	SnO₂	268.6	260.2	5171
Cristobalite ()*	Cristobalite	SiO₂	268.6	260.2	453
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	268.6	260.2	5591
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	268.6	260.2	17380
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	268.6	260.2	2349
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	268.6	260.2	2705
Topaz ()*	Topaz	Al₂SiO₄F₂	268.6	260.2	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_140	268.6	260.2	264.4 ± 4.2	K/Ar	Previous K/Ar determination			258						1194	Melbur China Clay Pit, Melbur, St Stephen-in-Brannel, Cornwall, England, UK	Melbur	Bray and Spooner (1983)	10.1144/GSL.SP.1964.001.01.15	EG78_1064

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...