Helium isotopic evidence for modification of the cratonic lithosphere during the Permo-Triassic Siberian flood basalt event

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F15%3A00000027" target="_blank" >RIV/00025798:_____/15:00000027 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0024493714004319" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0024493714004319</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.lithos.2014.12.001" target="_blank" >10.1016/j.lithos.2014.12.001</a>

Result language
angličtina
Original language name
Helium isotopic evidence for modification of the cratonic lithosphere during the Permo-Triassic Siberian flood basalt event
Original language description
The Siberian craton experienced one of the largest flood basalt events preserved in the geologic record ? eruption of the Permo-Triassic Siberian flood basalts (SFB) at ~250 Myr in response to upwelling of a deep-rooted mantle plume beneath the Siberiansub-continental lithospheric mantle (SCLM). We present He isotopes (3He/4He) and contents for distinct suites of peridotitic xenoliths recovered from two kimberlites: the 360 Ma Udachnaya and 160 Ma Obnazhennaya pipes, which erupted through the SiberianSCLM and bracket the eruption of the SFB. 3He/4He ratios span a range from 0.1 to 9.8 RA (RA = air 3He/4He) and fall into two distinct groups: 1) radiogenic pre-plume Udachnaya samples (mean cpx 3He/4He = 0.41 ? 0.30 RA (1 ?); n=7), and 2) ?mantle-like?post plume Obnazhennaya samples (mean cpx 3He/4He = 4.20 ? 0.90 RA (1 ?); n=5). Olivine separates from both kimberlite pipes tend to higher 3He/4He than clinopyroxenes (or garnet). Helium contents in Udachnaya samples ([He] = 0.13-1.35 ?c
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DD - Geochemistry
OECD FORD branch
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Project
<a href="/en/project/GAP210%2F12%2F1990" target="_blank" >GAP210/12/1990: Continental lithosphere as a source of differentiated alkaline lavas and genetic role of basic magmas constraints from volcanism of the Ohře Graben</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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