The behavior of osmium and other siderophile elements during impacts: Insights from the Ries impact structure and central European tektites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00475494" target="_blank" >RIV/61389005:_____/17:00475494 - isvavai.cz</a>

Alternative codes found

RIV/67985831:_____/17:00475494 RIV/00025798:_____/17:00000087 RIV/00216208:11310/17:10369809

Result on the web

<a href="http://dx.doi.org/10.1016/j.gca.2017.04.028" target="_blank" >http://dx.doi.org/10.1016/j.gca.2017.04.028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.gca.2017.04.028" target="_blank" >10.1016/j.gca.2017.04.028</a>

Result language

angličtina

Original language name

The behavior of osmium and other siderophile elements during impacts: Insights from the Ries impact structure and central European tektites

Original language description

Impact processes are natural phenomena that contribute to a variety of physico–chemical mechanisms over an extreme range of shock pressures and temperatures, otherwise seldomly achieved in the Earth's crust through other processes. Under these extreme conditions with transient temperatures and pressures ≥3000 K and ≥100 GPa, followed by their rapid decrease, the behavior of elements has remained poorly understood. Distal glassy ejecta (tektites) were produced in early phases of contact between the Earth's surface and an impacting body. Here we provide evidence for a complex behavior of Os and other highly siderophile elements (HSE, Ir, Ru, Pt, Pd, and Re) during tektite production related to a hyper-velocity impact that formed the Ries structure in Germany. Instead of simple mixing between the surface materials, which are thought to form the major source of central European tektites (moldavites), and impactor matter, the patterns of HSE contents and 187Re/188Os – 187Os/188Os ratios in moldavites, target sediments and impact-related breccias (suevites) can be explained by several sequential and/or contemporary processes. These involve (i) evaporative loss of partially oxidized HSE from the overheated tektite melt, (ii) mixing of target-derived and impactor-derived HSE vapor (plasma) phases, and (iii) early (high-temperature) condensation of a part of the mixed vapor phase back to silicate melt droplets. An almost complete loss of terrestrial Os from the tektite melt and its replacement with extra-terrestrial Os are indicated by low 187Os/188Os ratios in tektites (<0.163) relative to precursor materials (>0.69). This is paralleled by a co-variation between Os and Ni contents in tektites but not in suevites formed later in the impact process.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10406 - Analytical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

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

Name of the periodical

Geochimica et Cosmochimica Acta

ISSN

0016-7037

e-ISSN

—

Volume of the periodical

210

Issue of the periodical within the volume

1 August

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

59-70

UT code for WoS article

000405784000004

EID of the result in the Scopus database

2-s2.0-85019104417