Records of cosmogenic radionuclides 10Be, 26Al and 36Cl in corals: First studies on coral erosion rates and potential of dating very old corals

Devendra Lal; Christina D. Gallup; Bhamdipati L.K. Somayajulu; Loïc Vacher; Mark W. Caffee; Anthony J.T. Jull; Robert C. Finkel; Robert C. Speed; Amos Winter

doi:10.1016/j.gca.2005.08.012

Records of cosmogenic radionuclides ¹⁰Be, ²⁶Al and ³⁶Cl in corals: First studies on coral erosion rates and potential of dating very old corals

Devendra Lal, Christina D. Gallup, Bhamdipati L.K. Somayajulu, Loïc Vacher, Mark W. Caffee, Anthony J.T. Jull, Robert C. Finkel, Robert C. Speed, Amos Winter

Earth & Environmental Sciences-Duluth

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We present results of measurements of cosmogenic ¹⁰Be, ²⁶Al and ³⁶Cl, and the indigenous (intrinsic) concentrations of the stable elements Be, Al and Cl in 120-200 kyr old corals from Barbados and Puerto Rico. The concentration levels of these radionuclides in the corals lie in the range 10⁴ to 10⁸ atoms/g. A comparison of the measured nuclide concentrations with those expected to be produced in the corals by nuclear interactions of energetic cosmic radiation shows that (i) the radionuclides ²⁶Al and ³⁶Cl are derived from in situ cosmic ray interactions in the corals after their formation, but that (ii) the radionuclide ¹⁰Be owes its provenance in the coralline lattice primarily due to incorporation of dissolved beryllium in seawater in the lattice structure of the corals.

Original language	English (US)
Pages (from-to)	5717-5728
Number of pages	12
Journal	Geochimica et Cosmochimica Acta
Volume	69
Issue number	24
DOIs	https://doi.org/10.1016/j.gca.2005.08.012
State	Published - Dec 15 2005

Bibliographical note

Funding Information:
During the initial phases of this study, we were supported by a mini-grant, “CS-13-98”, from the California Space Institute (La Jolla). Critical comments from Martin Frank, John Gosse, Gregory Herzog, T. L. Ku and John Stone are greatly appreciated. One of us (D.L.) acknowledges generous support from Joan Eichen of the Eichen Foundation for carrying out this research, without which this research would not have fructified.

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Lal, D., Gallup, C. D., Somayajulu, B. L. K., Vacher, L., Caffee, M. W., Jull, A. J. T., Finkel, R. C., Speed, R. C., & Winter, A. (2005). Records of cosmogenic radionuclides ¹⁰Be, ²⁶Al and ³⁶Cl in corals: First studies on coral erosion rates and potential of dating very old corals. Geochimica et Cosmochimica Acta, 69(24), 5717-5728. https://doi.org/10.1016/j.gca.2005.08.012

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title = "Records of cosmogenic radionuclides 10Be, 26Al and 36Cl in corals: First studies on coral erosion rates and potential of dating very old corals",

abstract = "We present results of measurements of cosmogenic 10Be, 26Al and 36Cl, and the indigenous (intrinsic) concentrations of the stable elements Be, Al and Cl in 120-200 kyr old corals from Barbados and Puerto Rico. The concentration levels of these radionuclides in the corals lie in the range 104 to 108 atoms/g. A comparison of the measured nuclide concentrations with those expected to be produced in the corals by nuclear interactions of energetic cosmic radiation shows that (i) the radionuclides 26Al and 36Cl are derived from in situ cosmic ray interactions in the corals after their formation, but that (ii) the radionuclide 10Be owes its provenance in the coralline lattice primarily due to incorporation of dissolved beryllium in seawater in the lattice structure of the corals.",

author = "Devendra Lal and Gallup, {Christina D.} and Somayajulu, {Bhamdipati L.K.} and Lo{\"i}c Vacher and Caffee, {Mark W.} and Jull, {Anthony J.T.} and Finkel, {Robert C.} and Speed, {Robert C.} and Amos Winter",

note = "Funding Information: During the initial phases of this study, we were supported by a mini-grant, “CS-13-98”, from the California Space Institute (La Jolla). Critical comments from Martin Frank, John Gosse, Gregory Herzog, T. L. Ku and John Stone are greatly appreciated. One of us (D.L.) acknowledges generous support from Joan Eichen of the Eichen Foundation for carrying out this research, without which this research would not have fructified.",

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AU - Somayajulu, Bhamdipati L.K.

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AU - Caffee, Mark W.

AU - Jull, Anthony J.T.

AU - Finkel, Robert C.

AU - Speed, Robert C.

AU - Winter, Amos

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PY - 2005/12/15

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N2 - We present results of measurements of cosmogenic 10Be, 26Al and 36Cl, and the indigenous (intrinsic) concentrations of the stable elements Be, Al and Cl in 120-200 kyr old corals from Barbados and Puerto Rico. The concentration levels of these radionuclides in the corals lie in the range 104 to 108 atoms/g. A comparison of the measured nuclide concentrations with those expected to be produced in the corals by nuclear interactions of energetic cosmic radiation shows that (i) the radionuclides 26Al and 36Cl are derived from in situ cosmic ray interactions in the corals after their formation, but that (ii) the radionuclide 10Be owes its provenance in the coralline lattice primarily due to incorporation of dissolved beryllium in seawater in the lattice structure of the corals.

AB - We present results of measurements of cosmogenic 10Be, 26Al and 36Cl, and the indigenous (intrinsic) concentrations of the stable elements Be, Al and Cl in 120-200 kyr old corals from Barbados and Puerto Rico. The concentration levels of these radionuclides in the corals lie in the range 104 to 108 atoms/g. A comparison of the measured nuclide concentrations with those expected to be produced in the corals by nuclear interactions of energetic cosmic radiation shows that (i) the radionuclides 26Al and 36Cl are derived from in situ cosmic ray interactions in the corals after their formation, but that (ii) the radionuclide 10Be owes its provenance in the coralline lattice primarily due to incorporation of dissolved beryllium in seawater in the lattice structure of the corals.

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