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:
Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France

Oldest recorded age at locality: 520
Youngest recorded age at locality: 156

mindat Locality ID: 1720
mindat URL: http://www.mindat.org/loc-1720.html

Tectonic Settings:

Total number of sublocalities beneath "Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France": 0
Total number of bottom-level sublocalities: 0

Latitude: 45°59'9"N
Longitude: 1°18'29"E
Decimal Degree (lat, lon): 45.985833333333,1.3080555555556

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.

Autunite	Baryte	Compreignacite	Corundum	Fluorite	Meta-autunite	None	Phosphuranylite	Quartz	Schoepite
Wölsendorfite	Zircon

Agrinierite ()*	Autunite ()*	Baryte ()*	Becquerelite ()*	Billietite ()*
Coffinite ()*	Compreignacite ()*	Curite ()*	Fluorite ()*	Hematite ()*
Ianthinite ()*	Meta-autunite ()*	Uranophane-β ()*	Parsonsite ()*	Phosphuranylite ()*
Quartz ()*	Rameauite ()*	Sabugalite ()*	Schoepite ()*	Uraninite ()*
Uranophane-α ()*	Wölsendorfite ()*

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 Ba Ca F Fe H K O P Pb S Si U

Elements from minerals reported directly at this locality: Al Ba Ca F Fe H K O P Pb S Si U

Structural Groups for minerals in this locality:
Autunite Baryte Compreignacite Corundum Fluorite Meta-autunite None Phosphuranylite Quartz Schoepite
Wölsendorfite Zircon

22 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Agrinierite ()*	Compreignacite	K₂Ca[(UO₂)₃O₃(OH)₂]₂·5H₂O	276	276	1
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	276	276	1272
Baryte ()*	Baryte	Ba(SO₄)	520	156	11547
Becquerelite ()*	None	Ca(UO₂)₆O₄(OH)₆·8H₂O	276	276	92
Billietite ()*	None	Ba(UO₂)₆O₄(OH)₆·8H₂O	276	276	38
Coffinite ()*	Zircon	U(SiO₄)·nH₂O	276	276	566
Compreignacite ()*	Compreignacite	K₂(UO₂)₆O₄(OH)₆·7H₂O	276	276	27
Curite ()*	None	Pb_3+x[(UO₂)₄O_4+x(OH)_3-x]₂·2H₂O	276	276	51
Fluorite ()*	Fluorite	CaF₂	520	156	9617
Hematite ()*	Corundum	Fe₂O₃	520	156	14640
Ianthinite ()*	None	U⁴⁺₂(UO₂)₄O₆(OH)₄·9H₂O	276	276	31
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	276	276	388
Uranophane-β ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	276	276	144
Parsonsite ()*	None	Pb₂(UO₂)(PO₄)₂	276	276	63
Phosphuranylite ()*	Phosphuranylite	KCa(H₃O)₃(UO₂)₇(PO₄)₄O₄·8H₂O	276	276	182
Quartz ()*	Quartz	SiO₂	520	156	61156
Rameauite ()*	Compreignacite	K₂Ca(UO₂)₆O₆(OH)₄·6H₂O	276	276	4
Sabugalite ()*	None	HAl(UO₂)₄(PO₄)₄·16H₂O	276	276	87
Schoepite ()*	Schoepite	(UO₂)₄O(OH)₆(H₂O)₆	276	276	94
Uraninite ()*	Fluorite	UO₂	426	156	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	276	276	890
Wölsendorfite ()*	Wölsendorfite	Pb₇(UO₂)₁₄O₁₉(OH)₄·12H₂O	276	276	43

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Giersdorf_00000671	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000672	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000673	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000674	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000675	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000676	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000677	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000678	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000679	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000680	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000681	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000682	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000683	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000684	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000685	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000686	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000687	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000688	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex
Giersdorf_00000689	Mines are found in the La Crouzille district, in the Saint-Sylvestre granitic complex

20 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	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Giersdorf_00000671	276	276	276	U-Pb	Primary mineralization of pitchblende/uraninite with pyrite association	high				Pyrite, Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Age is given for the primary mineralization of the Uranium found in the area
Giersdorf_00000672	270	270	270	Pb	Age for coffinitization of the uraninite and remobilization of U					Galena	Pb	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Age is derived from a 6 Ma window measured from Pb found in Galena that specifies the duration of the coffinitizaiton process as the source uraninite is altered and remobilized
Giersdorf_00000673	315	315	315	Pb-Pb			uraninite	NBS 981 1	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000674	300	300	300	Pb-Pb			uraninite	NBS 981 2	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000675	342	342	342	Pb-Pb			uraninite	NBS 981 3	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000676	390	390	390	Pb-Pb			uraninite	NBS 981 4	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000677	165	165	165	Pb-Pb			uraninite	NBS 981 5	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000678	250	250	250	Pb-Pb			uraninite	NBS 981 6	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000679	256	256	256	Pb-Pb			uraninite	NBS 981 7	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000680	426	426	426	Pb-Pb			uraninite	NBS 981 8	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000681	267	267	267	Pb-Pb			uraninite	NBS 981 9	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000682	262	262	262	Pb-Pb			uraninite	NBS 981 10	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000683	173	173	173	Pb-Pb			uraninite	NBS 981 11	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000684	255	255	255	Pb-Pb			uraninite	NBS 981 12	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000685	156	156	156	Pb-Pb			uraninite	NBS 981 13	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000686	180	180	180	Pb-Pb			uraninite	NBS 981 14	Uraninite	Uraninite	U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000687	520	520	520	Pb-Pb	The lead release effect of the alteration from uraninite to coffinite is calculated to be 6 Ma on this sample, and is the source of the 6 Ma window of alteration time.		galena	Fanay 574 Galena	Galena	Galena		1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000688	315	315	315	Pb-Pb			pyrite	Fanay 574 Pyrite	Pyrite	Pyrite		1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Ages are derived from Pb207/Pb206 ratios after correction
Giersdorf_00000840	280	270	280-270				uraninite		Uraninite		U	1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Carrat & Kosztolanyi (1987)		CRSAS305_89
Giersdorf_00000689	175	170	175-170		Age is thought to correspond with the extension tectonism related to the opening of the Atlantic Ocean as well as the Tethys.							1720	Margnac Mine, Compreignac, Haute-Vienne, Nouvelle-Aquitaine, France	Margnac Mine	Leroy et al. (1984)	10.1016/0009-2541(84)90119-0	CG45_121	Age is given for a secondary remobilization of the uraninite, which is undetected by mineralogical studies.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...