The carbonate Sr isotopic composition of the Heimugou loess-paleosol section in Luochuan of Shaanxi Province shows large variation, with the 87 Sr/86 Sr ratios ranging from 0.7104 to 0.7120. The carbonate in paleosol has in general higher 87Sr/86Sr than the carbonate in loess. In the loess-paleosol section, the Sr isotopic composition vary with an about 100 ka The carbonate Sr isotopic composition of the Heimugou loess-paleosol section in Luochuan of Shaanxi Province shows large variation, with the 87 Sr / 86 Sr ratio ranging from 0.7104 to 0.7120. The carbonate in paleosol has in general higher 87Sr / 86Sr than the carbonate in loess. In the loess-paleosol section, the Sr isotopic composition varies with an about 100 ka