UThPb systematics of the eucrite 'Juvinas': Precise age determination and evidence for exotic lead

Autor:	G. Manhes, Claude J. Allègre, A. Provost
Rok vydání:	1984
Předmět:	Eucrite 010506 paleontology Radiogenic nuclide Isotope Geochemistry 010502 geochemistry & geophysics 01 natural sciences Parent body Meteorite Geochemistry and Petrology Breccia Radiometric dating Achondrite Geology 0105 earth and related environmental sciences
Zdroj:	Geochimica et Cosmochimica Acta. 48:2247-2264
ISSN:	0016-7037
DOI:	10.1016/0016-7037(84)90221-7
Popis:	The U-Th-Pb isotope systematics of the eucrite “Juvinas” have been studied in whole rock fragments as well as in plagioclases and pyroxenes. The results show that this monomict breccia crystallized with a very high UPb initial ratio at T = 4.539 ± 0.004 AE ago. There is evidence for a less radiogenic Pb component (206Pb204Pb = 13.0; 207Pb204Pb = 13.5; 208Pb204Pb = 32.71) interpreted as “exotic lead” induced by a meteoritical impact at the surface of the Juvinas parent body, 1.92 ± 0.06 AE ago.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::caddfb8248a66f77168dfa294d3c3a62 https://doi.org/10.1016/0016-7037(84)90221-7 Zobrazit plný text záznamu