[previous]

 

Figure 6.

δ¹⁸O data from Zaysan plotted against age. Red points are mean svita δ¹⁸O with 1σ uncertainty (x) and possible age range (y). Data from the Karabulak and Kalmakpay Sv. are smoothed using 1 Ma bandwidth Epanechnikov kernel (solid red line) with 1σ uncertainty (dashed red lines). Also plotted are published data from Central Asia (gray lines), Issyk Kul (orange line; Macaulay et al., 2016), and the Junggar Basin (brown line; Charreau et al., 2012). All are smoothed using an Epanechnikov kernel with 1 Ma bandwidth, after Caves et al. (2015). For the Akzhar Sv., we also plot the minimum δ¹⁸O value (small red point) due to evaporative enrichment in this svita. Eolian accumulation rate, as recorded by North Pacific deep-sea records (Rea et al., 1998), is a proxy for loess production. Note the prominent peak coincident with decreasing δ¹⁸O_c. Regional climatic and tectonic events are listed to the right. Shading indicates uncertainty in the timing of uplift and rain shadow development. Ol.—Oligocene; Qu.—Quaternary; Sv.—svita; VSMOW—Vienna Standard Mean Ocean Water.

[previous]