LEAD ISOTOPE GEOCHEMISTRY OF PALEOPROTEROZOIC LAYERED INTRUSIONS IN THE EASTERN BALTIC SHIELD: INFERENCES ABOUT MAGMA SOURCES AND U-TH-PB FRACTIONATION IN THE CRUST-MANTLE SYSTEM
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Amelin Y.V. | |
dc.contributor.author | Neymark L.A. | |
dc.date.accessioned | 2020-12-31T03:40:59Z | |
dc.date.available | 2020-12-31T03:40:59Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=13287899 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1998, , 3, 493-505 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21803 | |
dc.description.abstract | U-Pb data for plagioclase and sulfide are reported from the Burakovka and Olanga layered mafic-ultramafic complexes in Karelia. These 2.44–2.45 Ga complexes differ in the age of their host rocks and in post-emplacement metamorphic history. Acid leaching of optically discrete plagioclase populations revealed three components of Pb present in the Olanga plagioclases: initial, radiogenic, and alteration-related. Leaching in HCl and HNO3 was found to remove most of U and radiogenic Pb from plagioclase and to fractionate U from Pb. The alteration component, abundant in the Olanga plagioclase, is only partially removed by leaching. The Olanga sulfides also contain a significant radiogenic component. Plagioclase from the unmetamorphosed Burakovka Complex yields more reliable initial Pb ratios. | |
dc.subject | Paleoproterozoic | en |
dc.title | LEAD ISOTOPE GEOCHEMISTRY OF PALEOPROTEROZOIC LAYERED INTRUSIONS IN THE EASTERN BALTIC SHIELD: INFERENCES ABOUT MAGMA SOURCES AND U-TH-PB FRACTIONATION IN THE CRUST-MANTLE SYSTEM | |
dc.type | Статья | |
dc.subject.age | Precambrian::Proterozoic::Paleoproterozoic | en |
dc.subject.age | Докембрий::Протерозой::Палеопротерозойская | ru |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru