In situ cosmogenic 53Mn production rate from ancient low-denudation surface in tropic Brazil

T. Fujioka; L. K. Fifield; J. O. Stone; P. M. Vasconcelos; S. G. Tims; J. Chappell

doi:10.1016/j.nimb.2009.10.135

In situ cosmogenic ⁵³Mn production rate from ancient low-denudation surface in tropic Brazil

T. Fujioka^*, L. K. Fifield, J. O. Stone, P. M. Vasconcelos, S. G. Tims, J. Chappell

^*Corresponding author for this work

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

21 Citations (Scopus)

Abstract

Preliminary results of ⁵³Mn measurements for seven Brazilian haematites are presented. The production rate of ⁵³Mn due to cosmic-ray induced disintegration of iron is estimated to be 103 ± 19 atoms g(Fe)^-1 yr^-1 at sea level and high latitude. This is consistent with the only previously published measurement. The muon contribution to the total ⁵³Mn production at the surface is estimated to be ∼7%. Cosmogenic-isotope dating employing ⁵³Mn is applicable to any rock/mineral type that contains iron as a major constituent, such as haematite, goethite, pyroxene and olivine. The method has the potential to extend the time scale of cosmogenic exposure dating to >10 Ma.

Original language	English
Pages (from-to)	1209-1213
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	268
Issue number	7-8
DOIs	https://doi.org/10.1016/j.nimb.2009.10.135
Publication status	Published - Apr 2010

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title = "In situ cosmogenic 53Mn production rate from ancient low-denudation surface in tropic Brazil",

abstract = "Preliminary results of 53Mn measurements for seven Brazilian haematites are presented. The production rate of 53Mn due to cosmic-ray induced disintegration of iron is estimated to be 103 ± 19 atoms g(Fe)-1 yr-1 at sea level and high latitude. This is consistent with the only previously published measurement. The muon contribution to the total 53Mn production at the surface is estimated to be ∼7%. Cosmogenic-isotope dating employing 53Mn is applicable to any rock/mineral type that contains iron as a major constituent, such as haematite, goethite, pyroxene and olivine. The method has the potential to extend the time scale of cosmogenic exposure dating to >10 Ma.",

keywords = "Accelerator mass spectrometry (AMS), Exposure dating, Gas-filled magnet (GFM), Landscape evolution, Manganese-53 (Mn), Production rate",

author = "T. Fujioka and Fifield, {L. K.} and Stone, {J. O.} and Vasconcelos, {P. M.} and Tims, {S. G.} and J. Chappell",

year = "2010",

month = apr,

doi = "10.1016/j.nimb.2009.10.135",

language = "English",

volume = "268",

pages = "1209--1213",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

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TY - JOUR

T1 - In situ cosmogenic 53Mn production rate from ancient low-denudation surface in tropic Brazil

AU - Fujioka, T.

AU - Fifield, L. K.

AU - Stone, J. O.

AU - Vasconcelos, P. M.

AU - Tims, S. G.

AU - Chappell, J.

PY - 2010/4

Y1 - 2010/4

N2 - Preliminary results of 53Mn measurements for seven Brazilian haematites are presented. The production rate of 53Mn due to cosmic-ray induced disintegration of iron is estimated to be 103 ± 19 atoms g(Fe)-1 yr-1 at sea level and high latitude. This is consistent with the only previously published measurement. The muon contribution to the total 53Mn production at the surface is estimated to be ∼7%. Cosmogenic-isotope dating employing 53Mn is applicable to any rock/mineral type that contains iron as a major constituent, such as haematite, goethite, pyroxene and olivine. The method has the potential to extend the time scale of cosmogenic exposure dating to >10 Ma.

AB - Preliminary results of 53Mn measurements for seven Brazilian haematites are presented. The production rate of 53Mn due to cosmic-ray induced disintegration of iron is estimated to be 103 ± 19 atoms g(Fe)-1 yr-1 at sea level and high latitude. This is consistent with the only previously published measurement. The muon contribution to the total 53Mn production at the surface is estimated to be ∼7%. Cosmogenic-isotope dating employing 53Mn is applicable to any rock/mineral type that contains iron as a major constituent, such as haematite, goethite, pyroxene and olivine. The method has the potential to extend the time scale of cosmogenic exposure dating to >10 Ma.

KW - Accelerator mass spectrometry (AMS)

KW - Exposure dating

KW - Gas-filled magnet (GFM)

KW - Landscape evolution

KW - Manganese-53 (Mn)

KW - Production rate

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U2 - 10.1016/j.nimb.2009.10.135

DO - 10.1016/j.nimb.2009.10.135

M3 - Article

SN - 0168-583X

VL - 268

SP - 1209

EP - 1213

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 7-8

ER -

In situ cosmogenic ⁵³Mn production rate from ancient low-denudation surface in tropic Brazil

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