Triple oxygen isotope composition of Australasian tektites

0504241 - GLÚ 2020 RIV US eng J - Journal Article
Žák, Karel - Skála, Roman - Pack, A. - Ackerman, Lukáš - Křížová, Šárka
Triple oxygen isotope composition of Australasian tektites.
Meteoritics & Planetary Science. Roč. 54, č. 5 (2019), s. 1167-1181. ISSN 1086-9379. E-ISSN 1945-5100
R&D Projects: GA ČR(CZ) GA17-27099S
Institutional support: RVO:67985831
Keywords : tektites * oxygen isotope * Australasian tektites (AAT) * Muong Nong‐type tektites (MNAAT)
OECD category: Geology
Impact factor: 2.863, year: 2019
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/abs/10.1111/maps.13251

Major and trace element analyses and triple oxygen isotope measurements were performed on 11 individual specimens of Australasian tektites (AAT) with exactly known field positions from Laos. The sample set was dominated by Muong Nong‐type tektites (MNAAT), including separated layers of glass of different appearance and chemistry from four samples. This first larger set of oxygen isotope data of MNAAT revealed the δ¹⁸O range 8.7 ≤ δ¹⁸O ≤ 11.6‰ on VSMOW2 scale (12 analyses), only slightly wider than the previously reported range for splash‐form AAT. The Δ’¹⁷O values of MNAAT (−0.098 ≤ Δ’¹⁷O ≤ −0.069‰. 12 analyses) and splash‐form AAT (−0.080 ≤ Δ’¹⁷O ≤ −0.068‰, three analyses) are all in the range of data typical for terrestrial crustal rocks, with no mass‐independent oxygen isotope fractionation (from impactor or from exchange with atmospheric O₂) being observed.
Permanent Link: http://hdl.handle.net/11104/0295922