Evidence for deposition of 10 million tonnes of impact spherules across four continents 12,800 y ago

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F13%3A10188817" target="_blank" >RIV/00216208:11310/13:10188817 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/13:00399100

Výsledek na webu

<a href="http://dx.doi.org/10.1073/pnas.1301760110" target="_blank" >http://dx.doi.org/10.1073/pnas.1301760110</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1073/pnas.1301760110" target="_blank" >10.1073/pnas.1301760110</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evidence for deposition of 10 million tonnes of impact spherules across four continents 12,800 y ago

Popis výsledku v původním jazyce

Airbursts/impacts by a fragmented comet or asteroid have been proposed at the Younger Dryas onset (12.80 +/- 0.15 ka) based on identification of an assemblage of impact-related proxies, including microspherules, nanodiamonds, and iridium. Distributed across four continents at the Younger Dryas boundary (YDB), spherule peaks have been independently confirmed in eight studies, but unconfirmed in two others, resulting in continued dispute about their occurrence, distribution, and origin. To further addressthis dispute and better identify YDB spherules, we present results from one of the largest spherule investigations ever undertaken regarding spherule geochemistry, morphologies, origins, and processes of formation. We investigated 18 sites across NorthAmerica, Europe, and the Middle East, performing nearly 700 analyses on spherules using energy dispersive X-ray spectroscopy for geochemical analyses and scanning electron microscopy for surface microstructural characterization. Twelve lo

Název v anglickém jazyce

Evidence for deposition of 10 million tonnes of impact spherules across four continents 12,800 y ago

Popis výsledku anglicky

Airbursts/impacts by a fragmented comet or asteroid have been proposed at the Younger Dryas onset (12.80 +/- 0.15 ka) based on identification of an assemblage of impact-related proxies, including microspherules, nanodiamonds, and iridium. Distributed across four continents at the Younger Dryas boundary (YDB), spherule peaks have been independently confirmed in eight studies, but unconfirmed in two others, resulting in continued dispute about their occurrence, distribution, and origin. To further addressthis dispute and better identify YDB spherules, we present results from one of the largest spherule investigations ever undertaken regarding spherule geochemistry, morphologies, origins, and processes of formation. We investigated 18 sites across NorthAmerica, Europe, and the Middle East, performing nearly 700 analyses on spherules using energy dispersive X-ray spectroscopy for geochemical analyses and scanning electron microscopy for surface microstructural characterization. Twelve lo

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/LK21303" target="_blank" >LK21303: Stopy katastrofy, která způsobila úhyn velkých savců a klimatické změny před 12 900 lety</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Proceedings of the National Academy of Sciences of the United States of America

ISSN

0027-8424

e-ISSN

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Svazek periodika

110

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

"E2088"-"E2097"

Kód UT WoS článku

000320503000005

EID výsledku v databázi Scopus

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