2001/06/20 by Zhangdong Jin, Sumin Wang, Ji Shen +4 · 1 citation
Earth and Planetary Sciences · #Geochemistry and Elemental Analysis #Geology and Paleoclimatology Research #earthquake and tectonic studies
paper · doi:10.1002/esp.224
openalex publication_date 2001/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract Because of the different geochemical behaviour of rubidium and strontium in earth surface processes, variations of the Rb/Sr ratios in lake sediments were used as a geochemical proxy of chemical weathering and past climate in a single watershed. Low magnetic susceptibility, low CaCO 3 , low Sr concentration and, hence, high Rb/Sr ratio in the lake sediments indicate weak chemical weathering under a cold but wet climate during the Little Ice Age (LIA) in the closed Daihai Lake watershed. The concordant change in both Sr and CaCO 3 concentrations with δ 18 O values in the Dunde ice core suggests that weak chemical weathering during the wet LIA was controlled by air temperature. After the LIA, however, precipitation played a dominant role in chemical weathering. Copyright © 2001 John Wiley & Sons, Ltd.