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:
Cobra Pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Limpopo, South Africa

Oldest recorded age at locality: 2906
Youngest recorded age at locality: 2790

mindat Locality ID: 54196
mindat URL: http://www.mindat.org/loc-54196.html

Tectonic Settings:

Total number of sublocalities beneath "Cobra Pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Limpopo, South Africa": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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	Beryl	Clay	None	Pyrite	Quartz	Talc	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 Be Ca Fe H Mg Na O S Si

Elements from minerals reported directly at this locality: Al B Be Ca Fe H Mg Na O S Si

Structural Groups for minerals in this locality:
Amphibole Beryl Clay None Pyrite Quartz Talc Tourmaline

6 IMA Minerals at location:

Actinolite ()*	Beryl ()*	Pyrite ()*	Quartz ()*	Schorl ()*
Talc ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	2906	2790	3419
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	2906	2790	4286
Pyrite ()*	Pyrite	FeS₂	2906	2790	39462
Quartz ()*	Quartz	SiO₂	2906	2790	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	2906	2790	2705
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	2906	2790	3337

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
	Bradley_2012_120	2906	2790	2848±58	U/Pb			zircon			Yes	Zircon			26417	Gravelotte Emerald Mine, Gravelotte, Murchison Range, Limpopo, South Africa	[Murchison Belt]	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...