NOBLE GASES IN THE EARTH'S MANTLE
نویسندگان
چکیده
منابع مشابه
Noble gases in mantle plumes.
Trieloff et al. (1) provided neon isotope data to argue that mantle neon originates as a trapped component in meteorites rather than having a pristine solar composition. That finding, if true, has important consequences for understanding the mechanism of volatile input into the mantle, because it rules out models involving direct incorporation of solar gases. The main argument that Trieloff et ...
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Introduction: An outstanding problem in the Earth and planetary sciences is the source and mechanism by which the Earth-like planets accreted their highly volatile elements. Unlike highly refractory elements, which preserve close to solar proportions in even quite evolved meteorites and the inner planets, moderately refractory and more volatile elements are depleted relative to the highly refra...
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The chemical differences between deep- and shallow-mantle sources of oceanic basalts provide evidence that several distinct components coexist within the Earth's mantle. Most of these components have been identified as recycled in origin. However, the noble-gas signature is still a matter of debate and questions the preservation of primitive regions in the convective mantle. We show that a mode...
متن کاملNoble Gases in Tagish Lake
Introduction: Tagish Lake has been classified as a CI2 chondrite [1] with an interstellar grain abundance enhanced over that of CI1 and CM2 chondrites [2]. Noble gases have been used as markers for the presence of exotic, presolar grains in chondritic meteorites: Xe-HL (nanodiamonds) and Xe-s/Ne-E (SiC). We have measured He, Ne, Ar and Xe in whole-rock Tagish Lake, and an orthophosphoric acidre...
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This paper will start with an overview of the Manchester Visualization Centre (MVC), what we do, why we do it and who we do it to. The main elements of the paper will be to present four examples of our work: Visualization of Egyptian Mummy 1766, one of the Egyptian mummies belonging to the University Museum. We will explain what we did with the CT scan of this mummy, the special techniques that...
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ژورنال
عنوان ژورنال: Annual Review of Earth and Planetary Sciences
سال: 1998
ISSN: 0084-6597,1545-4495
DOI: 10.1146/annurev.earth.26.1.189