应用光释光技术确定匠杨村黄土沉积序列年代框架。结合地层沉积特征和其他指标测量结果,得到该区自末次冰消期以来成壤环境演变:16.66~13.16kaB.P.期间气候干旱,风尘输入量较大,成壤作用微弱;13.16~8.31kaB.P.期间气候转暖转湿,风尘输入量最小,但因植被没完全恢复致使成壤强度仍很弱;8.31~3.24kaB.P.期间气候湿润,风尘输入量较小,是重要的成壤期,其间6.19~5.77ka和末期3.78~3.24ka旱化趋势导致风尘输入量增加和成壤强度减弱;3.24ka以来,在气候旱化趋势下风尘输入量增加,成壤作用再次减弱。
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