Neon isotopic composition of plume (Discovery) influenced MORBs from the south Atlantic

Williams, Curtis D
Mukhopadhyay, Sujoy
The noble gas composition for the individual step-crushes of the two plume-influenced MORBs. MORB samples are from the Discovery Ridge segment of the South Atlantic mid-ocean ridge.These new neon isotopic measurements from deep mantle plumes reach values up to 13.03±0.04 (2 sigma). The measured 20Ne/22Ne ratios are demonstrably higher than solar wind irradiated material and CI chondrites, requiring the presence of nebular neon in the deep mantle. Furthermore, these new measurements allow us to determine a primordial mantle plume 20Ne/22Ne ratio of 13.23±0.22 (2 sigma), which is indistinguishable from the nebular ratio, providing robust evidence for a reservoir of nebular gas preserved in the deep mantle today.
How to cite this dataset:
Williams, C. D., Mukhopadhyay, S., 2018. Neon isotopic composition of plume (Discovery) influenced MORBs from the south Atlantic, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). Accessed 2024-04-25.
DOI Creation Date:
Williams, C.D. and Mukhopadhyay, S., 2019. Capture of nebular gases during Earth’s accretion is preserved in deep-mantle neon. Nature
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC-BY-NC-SA-3.0]
Funding source(s):
National Science Foundation: 1349811
National Science Foundation: 1250419
Coverage Scope: Regional (Continents, Oceans)
Geographic Location: Discovery plume, south Atlantic Ocean
User Contributed Keyword(s):
noble gases, neon isotopes, plume influenced MORBs, Discovery plume
Bounding Coordinates:
North: -47.35     South: -48.24     East: -10     West: -10.32
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