Matches in SemOpenAlex for { <https://semopenalex.org/work/W4256668133> ?p ?o ?g. }
Showing items 1 to 58 of
58
with 100 items per page.
- W4256668133 endingPage "248" @default.
- W4256668133 startingPage "247" @default.
- W4256668133 abstract "Zircons from metasediments and granitoids in the high-grade Lacorne block within the low-grade Archean Abitibi greenstone belt have been dated by the single zircon Pb-evaporation technique, yielding 207Pb/206Pb minimum ages. Detrital zircons in the mature clastic metasediments of the Lacorne block display a range of ages from 2691 ± 8 Ma to 3042 ± 6 Ma. The younger zircon ages (2691 ± 8, 2695 ± 4, 2715 ± 16, and 2719 ± 4 Ma) thus impose an upper limit for deposition and indicate that the high-grade Lacorne block is not basement to the Abitibi supracrustal sequence (2747−2680 Ma). Existence of abundant (69%) older detrital zircons (>2750 Ma) suggests in turn that the Abitibi supracrustal rocks are not the source of the Lacorne sediments. Two generations of granitoids occur in the Lacorne block, an early monzodiorite-monzonite-granodiorite-syenite series (MMGS, 2671 ± 4 to 2675 ± 24 Ma) and a younger S-type garnet-muscovite granite series (GMG, 2630 ± 20 to 2655 ± 8 Ma). This contrasts with granitoid magmatism in the Abitibi greenstone belt which ended at ~2675 Ma. The Pontiac subprovince to the south of the Abitibi greenstone belt shares all of the above features of the Lacorne block, including detrital zircon ages as well as the composition and timing of granitoid magmatism. This is interpreted to indicate that the Lacorne block was originally part of the same tectonic terrane as the Pontiac subprovince. After development of the MMGS magmatism (21670-2680 Ma), the Pontiac subprovince locally underthrust the Abitibi greenstone belt, and crustal thickening promoted partial melting of underthrust Pontiac metasediments to form the 2644 ± 13 Ma S-type granites. Later, differential uplift exposed the Lacorne block as a high-grade tectonic window in the Abitibi greenstone belt." @default.
- W4256668133 created "2022-05-12" @default.
- W4256668133 date "1990-01-01" @default.
- W4256668133 modified "2023-09-30" @default.
- W4256668133 title "The Reprotox agent list" @default.
- W4256668133 doi "https://doi.org/10.1016/0890-6238(90)90069-8" @default.
- W4256668133 hasPublicationYear "1990" @default.
- W4256668133 type Work @default.
- W4256668133 citedByCount "0" @default.
- W4256668133 crossrefType "journal-article" @default.
- W4256668133 hasConcept C127313418 @default.
- W4256668133 hasConcept C149347711 @default.
- W4256668133 hasConcept C150999391 @default.
- W4256668133 hasConcept C162973429 @default.
- W4256668133 hasConcept C165205528 @default.
- W4256668133 hasConcept C166957645 @default.
- W4256668133 hasConcept C17409809 @default.
- W4256668133 hasConcept C2778849375 @default.
- W4256668133 hasConcept C2780733770 @default.
- W4256668133 hasConcept C2781297371 @default.
- W4256668133 hasConcept C5900021 @default.
- W4256668133 hasConcept C77928131 @default.
- W4256668133 hasConcept C93033518 @default.
- W4256668133 hasConcept C95457728 @default.
- W4256668133 hasConceptScore W4256668133C127313418 @default.
- W4256668133 hasConceptScore W4256668133C149347711 @default.
- W4256668133 hasConceptScore W4256668133C150999391 @default.
- W4256668133 hasConceptScore W4256668133C162973429 @default.
- W4256668133 hasConceptScore W4256668133C165205528 @default.
- W4256668133 hasConceptScore W4256668133C166957645 @default.
- W4256668133 hasConceptScore W4256668133C17409809 @default.
- W4256668133 hasConceptScore W4256668133C2778849375 @default.
- W4256668133 hasConceptScore W4256668133C2780733770 @default.
- W4256668133 hasConceptScore W4256668133C2781297371 @default.
- W4256668133 hasConceptScore W4256668133C5900021 @default.
- W4256668133 hasConceptScore W4256668133C77928131 @default.
- W4256668133 hasConceptScore W4256668133C93033518 @default.
- W4256668133 hasConceptScore W4256668133C95457728 @default.
- W4256668133 hasIssue "3" @default.
- W4256668133 hasLocation W42566681331 @default.
- W4256668133 hasOpenAccess W4256668133 @default.
- W4256668133 hasPrimaryLocation W42566681331 @default.
- W4256668133 hasRelatedWork W1999573334 @default.
- W4256668133 hasRelatedWork W2069683510 @default.
- W4256668133 hasRelatedWork W2097622004 @default.
- W4256668133 hasRelatedWork W2105652317 @default.
- W4256668133 hasRelatedWork W2365209102 @default.
- W4256668133 hasRelatedWork W2370561967 @default.
- W4256668133 hasRelatedWork W2372597467 @default.
- W4256668133 hasRelatedWork W3014790791 @default.
- W4256668133 hasRelatedWork W3044368500 @default.
- W4256668133 hasRelatedWork W3204338544 @default.
- W4256668133 hasVolume "4" @default.
- W4256668133 isParatext "false" @default.
- W4256668133 isRetracted "false" @default.
- W4256668133 workType "article" @default.