Matches in SemOpenAlex for { <https://semopenalex.org/work/W1644706784> ?p ?o ?g. }
Showing items 1 to 62 of
62
with 100 items per page.
- W1644706784 startingPage "1251" @default.
- W1644706784 abstract "Excess Ir found in sediments at the Cretaceous/Tertiary (K/T) boundary and in other (e.g., Pliocene) sediments from deep sea drilling cores is widely interpreted as evidence of major impact events. The Australasian tektites originated in an impact event approximately 0.77 Ma ago; microtektites have been found in deep-sea sediment cores from throughout the Indian Ocean, the Philippine Sea, and western Pacific Ocean, but Ir has not been previously reported in these horizons. The deep-sea record of tektites is of particular interest, because in contrast to most continental occurrences, the stratigraphy preserves the original depositional position. Recently several cores having exceptionally high contents of Australasian microtektites have been investigated, Glass and Wu found shocked quartz associated with the microtektites. We used neutron activation to determine concentrations of Ir and other elements in two cores bearing microtektites, one from Deep Sea Drilling Project (DSDP) hole 758B in the Eastern Indian Ocean and one from DSDP hole 769A in the Sulu Sea (near Mindanao, Philippines). The sedimentation age for the microtektite layers in core 758B lies between 0.73 - 0.78 Ma and agrees well with the mean laser-fusion Ar-40/Ar-39 age of Australasian tektites of 0.77 +/- 0.02 Ma by Izett et al. We are able to resolve a small positive Ir enhancement in 758B. Core 769A shows too much scatter to allow resolution of an Ir peak." @default.
- W1644706784 created "2016-06-24" @default.
- W1644706784 creator A5003736509 @default.
- W1644706784 creator A5050692051 @default.
- W1644706784 creator A5090637329 @default.
- W1644706784 date "1993-01-01" @default.
- W1644706784 modified "2023-09-26" @default.
- W1644706784 title "Iridium in sediments containing large abundances of Australasian microtektites from DSDP hole 758B in the Eastern Indian Ocean and from DSDP hole 769A in the Sulu Sea" @default.
- W1644706784 hasPublicationYear "1993" @default.
- W1644706784 type Work @default.
- W1644706784 sameAs 1644706784 @default.
- W1644706784 citedByCount "0" @default.
- W1644706784 crossrefType "journal-article" @default.
- W1644706784 hasAuthorship W1644706784A5003736509 @default.
- W1644706784 hasAuthorship W1644706784A5050692051 @default.
- W1644706784 hasAuthorship W1644706784A5090637329 @default.
- W1644706784 hasConcept C111368507 @default.
- W1644706784 hasConcept C12294951 @default.
- W1644706784 hasConcept C127313418 @default.
- W1644706784 hasConcept C127413603 @default.
- W1644706784 hasConcept C151730666 @default.
- W1644706784 hasConcept C17409809 @default.
- W1644706784 hasConcept C21790881 @default.
- W1644706784 hasConcept C25197100 @default.
- W1644706784 hasConcept C78519656 @default.
- W1644706784 hasConceptScore W1644706784C111368507 @default.
- W1644706784 hasConceptScore W1644706784C12294951 @default.
- W1644706784 hasConceptScore W1644706784C127313418 @default.
- W1644706784 hasConceptScore W1644706784C127413603 @default.
- W1644706784 hasConceptScore W1644706784C151730666 @default.
- W1644706784 hasConceptScore W1644706784C17409809 @default.
- W1644706784 hasConceptScore W1644706784C21790881 @default.
- W1644706784 hasConceptScore W1644706784C25197100 @default.
- W1644706784 hasConceptScore W1644706784C78519656 @default.
- W1644706784 hasLocation W16447067841 @default.
- W1644706784 hasOpenAccess W1644706784 @default.
- W1644706784 hasPrimaryLocation W16447067841 @default.
- W1644706784 hasRelatedWork W1573145063 @default.
- W1644706784 hasRelatedWork W1643709535 @default.
- W1644706784 hasRelatedWork W1795934059 @default.
- W1644706784 hasRelatedWork W1968477438 @default.
- W1644706784 hasRelatedWork W1978798733 @default.
- W1644706784 hasRelatedWork W1981528387 @default.
- W1644706784 hasRelatedWork W1991669165 @default.
- W1644706784 hasRelatedWork W2002558280 @default.
- W1644706784 hasRelatedWork W2093032957 @default.
- W1644706784 hasRelatedWork W2099498660 @default.
- W1644706784 hasRelatedWork W2107172742 @default.
- W1644706784 hasRelatedWork W2108339308 @default.
- W1644706784 hasRelatedWork W2155008972 @default.
- W1644706784 hasRelatedWork W2372348190 @default.
- W1644706784 hasRelatedWork W2492043244 @default.
- W1644706784 hasRelatedWork W2597664027 @default.
- W1644706784 hasRelatedWork W2774670471 @default.
- W1644706784 hasRelatedWork W2915145703 @default.
- W1644706784 hasRelatedWork W2915648955 @default.
- W1644706784 hasRelatedWork W2916224041 @default.
- W1644706784 isParatext "false" @default.
- W1644706784 isRetracted "false" @default.
- W1644706784 magId "1644706784" @default.
- W1644706784 workType "article" @default.