RHENIUM-OSMIUM SYSTEMATICS OF CALCIUM-ALUMINIUM-RICH INCLUSIONS IN CARBONACEOUS CHONDRITES

dc.contributor.author	Becker H.
dc.contributor.author	Morgan J.W.
dc.contributor.author	Walker R.J.
dc.contributor.author	MacPherson G.J.
dc.contributor.author	Grossman J.N.
dc.date.accessioned	2021-04-09T02:56:43Z
dc.date.available	2021-04-09T02:56:43Z
dc.date.issued	2001
dc.identifier	https://www.elibrary.ru/item.asp?id=31876152
dc.identifier.citation	Geochimica et Cosmochimica Acta, 2001, 65, 19, 3379-3390
dc.identifier.issn	0016-7037
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/27604
dc.description.abstract	The Re-Os isotopic systematics of calcium-aluminium-rich inclusions (CAIs) in chondrites were investigated in order to shed light on the behavior of the Re-Os system in bulk chondrites, and to constrain the timing of chemical fractionation in primitive chondrites. CAIs with relatively unfractionated rare earth element (REE) patterns (groups I, III, V, VI) define a narrow range of 187Re/188Os (0.3764–0.4443) and 187Os/188Os (0.12599–0.12717), and high but variable Re and Os abundances (3209–41,820 ppb Os). In contrast, CAIs that show depletions in highly refractory elements and strongly fractionated REE patterns (group II) also show a much larger range in 187Re/188Os (0.409–0.535) and 187Os/188Os (0.12695–0.13770), and greater than an order of magnitude lower Re and Os abundances than other groups (e.g., 75.7–680.2 ppb Os).
dc.title	RHENIUM-OSMIUM SYSTEMATICS OF CALCIUM-ALUMINIUM-RICH INCLUSIONS IN CARBONACEOUS CHONDRITES
dc.type	Статья

Files in this item

Files	Size	Format	View
There are no files associated with this item.