Chemically Active Elements of Reservoir Quartz Cement Trace Hydrocarbon Migration in the Mahu Sag, Junggar Basin, NW China

Figure 8

(a) Contour map of MnO contents (wt.%) and pressure coefficients around the Mahu Sag. (b) Contour map of Sr contents (ppm) and pressure coefficients around the Mahu Sag. (c) Contour map of MnO/Zr ratios and pressure coefficients around the Mahu Sag. (d) Contour map of Y/Ho ratios and pressure coefficients around the Mahu Sag.

(a)

(b)

(c)

(d)