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| 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. |
| Allophane | Apatite | Arsenopyrite | Autunite | Chalcopyrite | Corundum | Covellite | Fluorite | Gypsum | Johannite |
| Malachite | None | Not in a structural group | Oxalate | Phosphuranylite | Pyrite | Quartz | Rocksalt | Schoepite | Stibnite |
| Zircon |
| 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 |
|---|---|---|---|---|---|---|---|
| Anhydrite (*) | Not in a structural group | Ca(SO4) | 520 | 15.97 | 0 | 1588 | |
| Arsenopyrite (*) | Arsenopyrite | FeAsS | 520 | 15.97 | 0 | 9052 | |
| Autunite (*) | Autunite | Ca(UO2)2(PO4)2·10-12H2O | 305 | 15.97 | 0 | 1272 | |
| Becquerelite (*) | None | Ca(UO2)6O4(OH)6·8H2O | 305 | 15.97 | 0 | 92 | |
| Billietite (*) | None | Ba(UO2)6O4(OH)6·8H2O | 305 | 15.97 | 0 | 38 | |
| Bismuthinite (*) | Stibnite | Bi2S3 | 520 | 15.97 | 0 | 1935 | |
| Chalcocite (*) | None | Cu2S | 520 | 15.97 | 0 | 5707 | |
| Chalcopyrite (*) | Chalcopyrite | CuFeS2 | 520 | 15.97 | 0 | 27198 | |
| Chrysocolla (*) | Allophane | (Cu2-xAlx)H2-xSi2O5(OH)4·nH2O | 520 | 15.97 | 0 | 3531 | |
| Coffinite (*) | Zircon | U(SiO4)·nH2O | 305 | 15.97 | 0 | 566 | |
| Covellite (*) | Covellite | CuS | 520 | 15.97 | 0 | 4165 | |
| Dewindtite (*) | Phosphuranylite | H2Pb3(UO2)6O4(PO4)4·12H2O | 305 | 15.97 | 0 | 82 | |
| Fluorite (*) | Fluorite | CaF2 | 520 | 15.97 | 0 | 9617 | |
| Galena (*) | Rocksalt | PbS | 520 | 15.97 | 0 | 24243 | |
| Gypsum (*) | Gypsum | Ca(SO4)·2H2O | 520 | 15.97 | 0 | 6890 | |
| Hematite (*) | Corundum | Fe2O3 | 520 | 15.97 | 0 | 14640 | |
| Ianthinite (*) | None | U4+2(UO2)4O6(OH)4·9H2O | 305 | 15.97 | 0 | 31 | |
| Johannite (*) | Johannite | Cu(UO2)2(SO4)2(OH)2·8H2O | 305 | 15.97 | 0 | 69 | |
| Kasolite (*) | None | Pb(UO2)(SiO4)·H2O | 305 | 15.97 | 0 | 198 | |
| Malachite (*) | Malachite | Cu2(CO3)(OH)2 | 520 | 15.97 | 0 | 12537 | |
| Uranophane-β (*) | None | Ca(UO2)2(SiO3OH)2·5H2O | 305 | 15.97 | 0 | 144 | |
| Parsonsite (*) | None | Pb2(UO2)(PO4)2 | 305 | 15.97 | 0 | 63 | |
| Phosphuranylite (*) | Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4·8H2O | 305 | 15.97 | 0 | 182 | |
| Pyrite (*) | Pyrite | FeS2 | 520 | 15.97 | 0 | 39462 | |
| Pyromorphite (*) | Apatite | Pb5(PO4)3Cl | 520 | 15.97 | 0 | 1725 | |
| Quartz (*) | Quartz | SiO2 | 520 | 15.97 | 0 | 61156 | |
| Schoepite (*) | Schoepite | (UO2)4O(OH)6(H2O)6 | 305 | 15.97 | 0 | 94 | |
| Torbernite (*) | None | Cu(UO2)2(PO4)2·12H2O | 305 | 15.97 | 0 | 1059 | |
| Uraninite (*) | Fluorite | UO2 | 305 | 305 | 0 | 2718 | |
| Uranophane-α (*) | None | Ca(UO2)2(SiO3OH)2·5H2O | 305 | 15.97 | 0 | 890 | |
| Uranopilite (*) | None | (UO2)6(SO4)O2(OH)6·14H2O | 305 | 15.97 | 0 | 94 | |
| Vandendriesscheite (*) | None | Pb1.6(UO2)10O6(OH)11·11H2O | 305 | 15.97 | 0 | 52 | |
| Whewellite (*) | Oxalate | Ca(C2O4)·H2O | 520 | 15.97 | 0 | 66 | |
| Wyartite (*) | None | CaU5+(UO2)2(CO3)O4(OH)·7H2O | 305 | 15.97 | 0 | 3 |
| Age ID | Locality Notes |
|---|---|
| Giersdorf_00000690 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000691 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000692 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000693 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000694 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000695 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000696 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000698 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| Giersdorf_00000700 | The genesis of the Bois Noirs-Limouzat uranium deposit involves a very complex history. The Bols Noirs granite resulted from the anatexis of uranium-rich sediments near granulite facies conditions. The temperature is estimated to have been at least 800 degrees Celsius accompanied by a low H20 partial pressure (possibly resulting from the presence of carbon dioxide). This magma was syntectonically emplaced along the east-west structures in a nonmetamorphic environment. Progressive crystallization and differentiation proceeded inward from the margins toward the core of the intrusion. A fluid phase formed after a large part of the magma had crystallized. This fluid migrated toward the core and altered the primary magmatic minerals, quartz, orthoclase, oligoclase, and biotite, to quartz, microcline , albite, and chlorite. The alteration of the primary accessory minerals, sphene, zircon, monazite, and xenotime, resulted in the partial liberation of their uranium content. When all the magma had crystallized, the fluid phase migrated outward to precipitate uraninite, with an associated quartz-muscovite alteration. This critical step produced an easily leachable uranium source in the granite in the form of uraninite. |
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Giersdorf_00000690 | 520 | 520 | 520 | biotite | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Age is given for the biotite granite of the first intrusion of the subject area | ||||||||||
| Giersdorf_00000691 | 312 | 298 | 312-298 | whole rock | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Age of metamorphism affecting the granite in the Bois Noirs | ||||||||||
| Giersdorf_00000692 | 343 | 327 | 335±8 | whole rock | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Age of metamorphic event of the Bois Nors altering the Visean schist of the Ferrieres Basin | ||||||||||
| Giersdorf_00000693 | 315 | 310 | 315-310 | biotite | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Age of the intrusion of the Mayet-de-Montagne monzogranite | ||||||||||
| Giersdorf_00000694 | 309 | 303 | 306±3 | muscovite | Muscovite | Muscovite | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | The age given is for the closing of the mica lattice, not the intrusion or emplacement of the granite | ||||||||
| Giersdorf_00000695 | 280 | 264 | 272±8 | One of a series of minor intrusions during the Permian | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Intrusion age | ||||||||||
| Giersdorf_00000696 | 295 | 245 | 270±25 | One of a series of minor intrusions during the Permian | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Intrusion Age | ||||||||||
| Giersdorf_00000698 | 305 | 305 | 305 | Maximum age for the uraninite of the mine | Uraninite | U | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | uraninite is found in the fractures of the microgranite of the mine, thereby constraining the maximum age of the uraninite mineralization | ||||||||
| Giersdorf_00000700 | 33.9 | 15.97 | Oligocene-Lower Miocene | U | 12814 | Le Limouzat Mine (incl. Le Limouzat Quarry; BN3; BN5; BN6), Les Bois-Noirs Mining Claim, Saint-Priest-la-Prugne, Saint-Just-en-Chevalet, Loire, Auvergne-Rhône-Alpes, France | Bois Noirs-Limouzat Uranium Vein | Cuney (1978) | 10.2113/gsecongeo.73.8.1567 | EG73_1567 | Age of mobilization of secondary uranium minerals, described in the literature as Oligocene-Lower Miocene |
| Sample | Source Locality | Reference URL |
|---|---|---|
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