Figure 3
From: Spatial and temporal variations of Rb/Sr ratios of the bulk surface sediments in Lake Qinghai
Spatial patterns of mass accumulation rates and magnetic susceptibility (a), SiO 2 (b) and Ti (c) contents, and Rb/Sr ratios (d) of the surface sediments in Lake Qinghai. The horizontal coordinates are arranged according to both mass accumulation rate and the distance from sampling sites to the estuaries and/or lake shoreline. The magnetic susceptibility is highly positively correlated with the corresponding Fe contents (r = 0.9; figure not shown). Elements of the mixed-cores and those of the 1963-sect for each site have similar spatial patterns.