Implications for behavior of volatile elements during impacts—Zinc and copper systematics in sediments 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%2F67985831%3A_____%2F17%3A00479288" target="_blank" >RIV/67985831:_____/17:00479288 - isvavai.cz</a>

Alternative codes found

RIV/00025798:_____/17:00000062 RIV/00216208:11310/17:10364015

Result on the web

<a href="http://dx.doi.org/10.1111/maps.12922" target="_blank" >http://dx.doi.org/10.1111/maps.12922</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/maps.12922" target="_blank" >10.1111/maps.12922</a>

Result language

angličtina

Original language name

Implications for behavior of volatile elements during impacts—Zinc and copper systematics in sediments from the Ries impact structure and central European tektites

Original language description

Moldavites are tektites genetically related to the Ries impact structure, located in Central Europe, but the source materials and the processes related to the chemical fractionation of moldavites are not fully constrained. To further understand moldavite genesis, the Cu and Zn abundances and isotope compositions were measured in a suite of tektites from four different substrewn fields (South Bohemia, Moravia, Cheb Basin, Lusatia) and chemically diverse sediments from the surroundings of the Ries impact structure. Moldavites are slightly depleted in Zn (ca 10–20%) and distinctly depleted in Cu (>90%) relative to supposed sedimentary precursors. Moreover, the moldavites show a wide range in .delta.66Zn values between 1.7 and 3.7‰ (relative to JMC 3-0749 Lyon) and .delta.65Cu values between 1.6 and 12.5‰ (relative to NIST SRM 976) and are thus enriched in heavy isotopes relative to their possible parent sedimentary sources (.delta.66Zn = −0.07 to +0.64‰, .delta.65Cu = −0.4 to +0.7‰). In particular, the Cheb Basin moldavites show some of the highest .delta.65Cu values (up to 12.5‰) ever observed in natural samples. The relative magnitude of isotope fractionation for Cu and Zn seen here is opposite to oxygen-poor environments such as the Moon where Zn is significantly more isotopically fractionated than Cu. One possibility is that monovalent Cu diffuses faster than divalent Zn in the reduced melt and diffusion will not affect the extent of Zn isotope fractionation. These observations imply that the capability of forming a redox environment may aid in volatilizing some elements, accompanied by isotope fractionation, during the impact process. The greater extent of elemental depletion, coupled with isotope fractionation of more refractory Cu relative to Zn, may also hinge on the presence of carbonyl species of transition metals and electromagnetic charge, which could exist in the impact-induced high-velocity jet of vapor and melts.

Czech name

—

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

10505 - Geology

Project

<a href="/en/project/GA13-22351S" target="_blank" >GA13-22351S: Combined use of novel and traditional stable isotope systems in identifying source components and processes of moldavite formation</a><br>

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

Meteoritics & Planetary Science

ISSN

1086-9379

e-ISSN

—

Volume of the periodical

52

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

2178-2192

UT code for WoS article

000412173600007

EID of the result in the Scopus database

2-s2.0-85026364214