FN Archimer Export Format
PT J
TI Origin of Light Noble Gases (He, Ne, and Ar) on Earth: A Review
BT 
AF PERON, Sandrine
   MOREIRA, Manuel
   AGRANIER, Arnaud
AS 1:1;2:1;3:2,3;
FF 1:;2:;3:;
C1 Univ Paris Diderot, Sorbonne Paris Cite, Inst Phys Globe Paris, CNRS,UMR 7154, Paris, France.
   Univ Bretagne Occidentale, Lab Geosci Ocean, CNRS, UMR 6538, Plouzane, France.
   Inst Univ Europeen Mer, Plouzane, France.
C2 UNIV PARIS 07, FRANCE
   UBO, FRANCE
   UBO, FRANCE
UM LGO
IF 2.946
TC 22
UR https://archimer.ifremer.fr/doc/00638/74992/75837.pdf
LA English
DT Article
DE ;volatile origin;helium;neon;argon;solar wind implantation
AB We review the different scenarios for the origin of light noble gases (He, Ne, and Ar) on Earth. Several sources could have contributed to the Earth's noble gas budget: implanted solar wind, solar nebula gas, chondrites, and comets. Although there is evidence for solar-like neon in the Earth's mantle, questions remain as to its origin. A new compilation of noble gas data in lunar soils, interplanetary dust particles, micrometeorites, and solar wind allows examination of the implanted solar wind composition, which is key to understanding the solar-like mantle neon isotope composition. We show that lunar soils that reflect this solar-wind-implanted signature have a Ne-20/Ne-22 ratio very close to that of ocean island basalts. New data and calculations illustrate that the measured plume source Ne-20/Ne-22 ratio is close to the primitive mantle ratio, when taking into account mixing with the upper mantle (that has lower Ne-20/Ne-22 ratio). This favors early solar wind implantation to account for the origin of light volatiles (He, Ne, and possibly H) in the Earth's mantle: they were incorporated by solar wind irradiation into the Earth's precursor grains during the first few Myr of the solar system's formation. These grains must have partially survived accretion processes (only a few percent are needed to satisfy the Earth's budget of light volatiles). As for the atmosphere, the neon isotope composition can be explained by mixing 36% of mantle gases having this solar-wind-implanted signature and 64% of chondritic gases delivered in a late veneer phase. 
PY 2018
PD APR
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 19
IS 4
UT 000434110500001
BP 979
EP 996
DI 10.1002/2017GC007388
ID 74992
ER

EF