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Title: Geoneutrinos and Heat Production in the Earth: Constraints and Implications

Abstract

Recent results from antineutrino (geoneutrino) studies at KamLAND are coincident with geochemical models of Th and U in the Earth.  KamLAND and Borexino detectors are on line, thus uncertainties in counting statistics will be reduced as data are accumulated.  The SNO+ detector, situated in the middle of the North American plate will come on line in ~3 yrs and will be best suited to yield a precise estimate of the continental contribution to the Earth’s Th & U budget.  The distribution of heat producing elements in the Earth drives convection and plate tectonics.  Geochemical models posit that ~40% of the heat producing elements are in the continental crust, with the remainder in the mantle.  Although models of core formation allow for the incorporation of heat producing elements, the core contribution of radiogenic heating is considered to be negligible.  Most parameterized convection models for the Earth require significant amounts of radiogenic heating of the Earth, a factor of two greater than geochemical models predict.  The initial KamLAND results challenge these geophysical models and support geochemical models calling for a significant contribution from secular cooling of the mantle.

Authors:
Publication Date:
Research Org.:
FNAL (Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States))
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
987343
DOE Contract Number:
AC02-07CH11359
Resource Type:
Multimedia
Resource Relation:
Conference: Fermilab Colloquia, Fermi National Accelerator Laboratory (FNAL), Batvia, Illinois (United States), presented on July 02, 2008
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GEOCHEMISTRY; GEOPHYSICS; KAMLAND

Citation Formats

McDonough, Bill. Geoneutrinos and Heat Production in the Earth: Constraints and Implications. United States: N. p., 2008. Web.
McDonough, Bill. Geoneutrinos and Heat Production in the Earth: Constraints and Implications. United States.
McDonough, Bill. Wed . "Geoneutrinos and Heat Production in the Earth: Constraints and Implications". United States. https://www.osti.gov/servlets/purl/987343.
@article{osti_987343,
title = {Geoneutrinos and Heat Production in the Earth: Constraints and Implications},
author = {McDonough, Bill},
abstractNote = {Recent results from antineutrino (geoneutrino) studies at KamLAND are coincident with geochemical models of Th and U in the Earth.  KamLAND and Borexino detectors are on line, thus uncertainties in counting statistics will be reduced as data are accumulated.  The SNO+ detector, situated in the middle of the North American plate will come on line in ~3 yrs and will be best suited to yield a precise estimate of the continental contribution to the Earth’s Th & U budget.  The distribution of heat producing elements in the Earth drives convection and plate tectonics.  Geochemical models posit that ~40% of the heat producing elements are in the continental crust, with the remainder in the mantle.  Although models of core formation allow for the incorporation of heat producing elements, the core contribution of radiogenic heating is considered to be negligible.  Most parameterized convection models for the Earth require significant amounts of radiogenic heating of the Earth, a factor of two greater than geochemical models predict.  The initial KamLAND results challenge these geophysical models and support geochemical models calling for a significant contribution from secular cooling of the mantle.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {7}
}

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