Age determination of the Vendian intrusions in the polar Urals
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2000
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| _version_ | 1867170459590590464 |
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| author | Gee, David G Beliakova, Liana Pease, Victria Larionov, Alexander N Dovshikova, Lena |
| author_facet | Gee, David G Beliakova, Liana Pease, Victria Larionov, Alexander N Dovshikova, Lena |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Precambrian basement beneath the Pechora Basin of northern Russia is known from deep (up to approx. 4.5 km) drill holes to be largely composed of Neoproterozoic successions, variously deformed and metamorphosed and intruded by magmatic suites of Vendian age. Presented here are new single- zircon, Pb-evaporation (Kober method) ages from eight intrusions across the Izhma, Pechora and Bolshezemel'skaya Zones, all from below the Lower Ordovician (locally Middle Cambrian) unconformity. The majority of the intrusions (six) yield remarkably similar ages of 550-560 Ma, apparently dating a widespread pulse of late- to post-tectonic magmatism. An early Vendian granite (618 Ma) has been identified in the northeasternmost region (Bolshezemel'skaya zone) and a Devonian granodiorite (380 Ma) in the Pechora Zone, where mid to late Palaeozoic magmatism has been previously reported. Evidence of inheritance in the zircon populations suggests the presence of Mesoproterozoic crust beneath the Neoproterozoic complexes. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_759659 |
| institution | PANGAEA |
| language | en |
| publishDate | 2000 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age determination of the Vendian intrusions in the polar Urals Gee, David G Beliakova, Liana Pease, Victria Larionov, Alexander N Dovshikova, Lena DRILL; Drilling/drill rig; East_Charkayu-1; East_Kharyaga-26; Geological sample; GEOS; Mala_Pera-11; Mytnyi_Materik-2; Novaya-1; Palyu-21; Pechora area, NE Baltic; Polar Urals; South_Charkayu-10; Timan-pechora; Veyak-2 The Precambrian basement beneath the Pechora Basin of northern Russia is known from deep (up to approx. 4.5 km) drill holes to be largely composed of Neoproterozoic successions, variously deformed and metamorphosed and intruded by magmatic suites of Vendian age. Presented here are new single- zircon, Pb-evaporation (Kober method) ages from eight intrusions across the Izhma, Pechora and Bolshezemel'skaya Zones, all from below the Lower Ordovician (locally Middle Cambrian) unconformity. The majority of the intrusions (six) yield remarkably similar ages of 550-560 Ma, apparently dating a widespread pulse of late- to post-tectonic magmatism. An early Vendian granite (618 Ma) has been identified in the northeasternmost region (Bolshezemel'skaya zone) and a Devonian granodiorite (380 Ma) in the Pechora Zone, where mid to late Palaeozoic magmatism has been previously reported. Evidence of inheritance in the zircon populations suggests the presence of Mesoproterozoic crust beneath the Neoproterozoic complexes. |
| title | Age determination of the Vendian intrusions in the polar Urals |
| topic | DRILL; Drilling/drill rig; East_Charkayu-1; East_Kharyaga-26; Geological sample; GEOS; Mala_Pera-11; Mytnyi_Materik-2; Novaya-1; Palyu-21; Pechora area, NE Baltic; Polar Urals; South_Charkayu-10; Timan-pechora; Veyak-2 |
| url | https://doi.org/10.1594/PANGAEA.759659 |