TY - JOUR T1 - In situ cosmogenic (10)Be production-rate calibration from the Southern Alps, New Zealand RID D-4720-2011 JF - Quaternary Geochronology Y1 - 2010 A1 - Putnam, A. E. A1 - Schaefer, J. M. A1 - Barrell, D. J. A. A1 - Vandergoes, M. A1 - Denton, G. H. A1 - Kaplan, M. R. A1 - Finkel, R. C. A1 - Schwartz, R. A1 - Goehring, B. M. A1 - Kelley, S. E. AB - We present a (10)Be production-rate calibration derived from an early Holocene debris-flow deposit at about 1000 m above sea level in the central Southern Alps, New Zealand, in the mid-latitude Southern Hemisphere. Ten radiocarbon ages on macrofossils from a soil horizon buried by the deposit date the deposit to 9690 +/- 50 calendar years before AD2008. Surface (10)Be concentrations of seven large boulders partially embedded in the stable surface of the deposit are tightly distributed, yielding a standard deviation of similar to 2%. Conversion of the (10)Be measurements to sea level/high-latitude values using each of five standard scaling methods indicates (10)Be production rates of 3.84 +/- 0.08, 3.87 +/- 0.08, 3.83 +/- 0.08, 4.15 +/- 0.09, and 3.74 +/- 0.08 atoms g(-1) a(-1), relative to the '07KNSTD' (10)Be AMS standard, and including only the local time-integrated production-rate uncertainties. When including a sea level high-latitude scaling uncertainty the overall error is similar to 2.5% (1 sigma) for each rate. To test the regional applicability of this production-rate calibration, we measured (10)Be concentrations in a set of nearby moraines deposited before 18060 +/- 200 years before AD2008. The (10)Be ages are only consistent with minimum-limiting (14)C age data when calculated using the new production rates. This also suggests that terrestrial in situ cosmogenic-nuclide production did not change significantly from Last Glacial Maximum to Holocene time in New Zealand. Our production rates agree well with those of a recent calibration study from northeastern North America, but are 12-14% lower than other commonly adopted values. The production-rate values presented here can be used elsewhere in New Zealand for rock surfaces exposed during or since the last glacial period. (C) 2009 Elsevier B.V. All rights reserved. VL - 5 IS - 4 N1 - id: 2031; PT: J; UT: WOS:000280946500002 JO - In situ cosmogenic (10)Be production-rate calibration from the Southern Alps, New Zealand RID D-4720-2011 ER - TY - JOUR T1 - In situ cosmogenic Be-10 production-rate calibration from the Southern Alps, New Zealand JF - QUATERNARY GEOCHRONOLOGY Y1 - 2010 A1 - Putnam, A. E. A1 - Schaefer, J. M. A1 - Barrell, D. J. A. A1 - Vandergoes, M. A1 - Denton, G. H. A1 - Kaplan, M. R. A1 - Finkel, R. C. A1 - Schwartz, R. A1 - Goehring, B. M. A1 - Kelley, S. E. KW - Be-10 KW - C-14 KW - Cosmogenic nuclide KW - Debris flow KW - Holocene KW - Last glacial maximum KW - Moraine KW - Production rate KW - South Island AB - We present a Be-10 production-rate calibration derived from an early Holocene debris-flow deposit at about 1000 m above sea level in the central Southern Alps, New Zealand, in the mid-latitude Southern Hemisphere. Ten radiocarbon ages on macrofossils from a soil horizon buried by the deposit date the deposit to 9690 +/- 50 calendar years before AD2008. Surface Be-10 concentrations of seven large boulders partially embedded in the stable surface of the deposit are tightly distributed, yielding a standard deviation of similar to 2%. Conversion of the Be-10 measurements to sea level/high-latitude values using each of five standard scaling methods indicates Be-10 production rates of 3.84 +/- 0.08, 3.87 +/- 0.08, 3.83 +/- 0.08, 4.15 +/- 0.09, and 3.74 +/- 0.08 atoms g(-1) a(-1), relative to the `07KNSTD' Be-10 AMS standard, and including only the local time-integrated production-rate uncertainties. When including a sea level high-latitude scaling uncertainty the overall error is similar to 2.5% (1 sigma) for each rate. To test the regional applicability of this production-rate calibration, we measured Be-10 concentrations in a set of nearby moraines deposited before 18060 +/- 200 years before AD2008. The Be-10 ages are only consistent with minimum-limiting C-14 age data when calculated using the new production rates. This also suggests that terrestrial in situ cosmogenic-nuclide production did not change significantly from Last Glacial Maximum to Holocene time in New Zealand. Our production rates agree well with those of a recent calibration study from northeastern North America, but are 12-14% lower than other commonly adopted values. The production-rate values presented here can be used elsewhere in New Zealand for rock surfaces exposed during or since the last glacial period. (C) 2009 Elsevier B.V. All rights reserved. VL - 5 ER - TY - JOUR T1 - In situ cosmogenic 10Be production-rate calibration from the Southern Alps, New Zealand JF - Quaternary Geochronology Y1 - 2009 A1 - Putnam, A. E. A1 - Schaefer, J. M. A1 - Barrell, D. J. A. A1 - Vandergoes, M. A1 - Denton, G. H. A1 - Kaplan, M. R. A1 - Finkel, R. C. A1 - Schwartz, R. A1 - Goehring, B. M. A1 - Kelley, S. E. N1 - id: 840In pressY JO - In situ cosmogenic 10Be production-rate calibration from the Southern Alps, New Zealand ER -