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Description
Attributed from combination of AMS-measured cosmogenic 10Be record in loess with RTA mathematical trace method, decline of loess susceptibility in the Xifeng 0-870Ka profile is unexpectedly revealed by the uptilting of the RTA-reconstructed 0-870Ka atmospheric 10Be production rate Pr curve and is indubitably certificated by high similarities R2≈0.9 (or r=0.94) shown in the linear regression between both measured or both corrected 10Be concentration Be(M) and the susceptibility SUS(M) in the same sample all the time within 0-870Ka interval. Then, the “inversion correction” method (“μcorrection”) of loess susceptibility decline is developed to recover the declined susceptibility and the “Indirect Verification of Golden Standard” method is adopted to assess accuracy of the μ-corrected Xifeng 0-870Ka loess susceptibility.
The μ-correction has shown that the average decline amount (or average correction amount) of the Xifeng 0-870Ka loess susceptibility is as high as 87%. And the “Indirect Verification of Golden Standard” has indicated almost complete similarity r = 0.99 and acceptable relative standard deviation of point to point difference RSD = 4.43% between the verifying curve related to the Golden Standard of Verification and the examined curve related to the recovered susceptibility, which inconceivably manifests that decline rule of loess susceptibility accumulated in the specific Xifeng 0-870Ka profile is in almost complete similarity (r=0.9914) to the decay rule of the 10Be atoms due to unknown mechanism.
| Student Submission | No |
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