More detail in specified region of contour plot

I have generated the following contour plot in Mathematica using a (extremely lengthy) function, $$f$$: I used ImagePadding -> 1, PlotRangePadding -> None to remove the axes labels (so I could add them in LaTeX later), which have the following range: x-axis: 0 to 1, y-axis: 0 to 2$$\pi$$.

Using the the problem is that I expect the black region to have more information. Using FindMinimum, I have plotted the minimum using a red dot (2 of them can be seen near the y axis since it is a periodic function).

How can I adapt the following ContourPlot functions so that it adds more contours around the black region?

ContourPlot[QCRB[r\[Xi], \[Theta]\[Xi], 0.78, 1 \[Pi], 0.8 \[Pi], 1, 1][[1, 2]], {r\[Xi], 0, 1}, {\[Theta]\[Xi], 0, 2 Pi}, PlotLegends -> Automatic, Contours -> 15, WorkingPrecision -> 10, ImagePadding -> 1, PlotRangePadding -> None, ColorFunction -> "SunsetColors", ContourStyle -> {Thickness[0.003]}, FrameStyle -> Thickness[0.008], FrameTicksStyle -> Thickness[0.008] ]
• You can use contours with any function value $f=c_i$ with Contours -> Table[c[i],{i,15}] – Alex Trounev Dec 13 '18 at 12:24
• Dear Sid, please could you show me how to add the axis labels in Latex, and in what format you export the image from Mathematica ? – Simon Dec 13 '18 at 13:20
• @Simon, export as .pdf, and import into a standalone tikz file. You can then add nodes for the axes labels. This is the best way I've come across doing this. – Sid Dec 13 '18 at 13:57
• @AlexTrounev - or more compactly, Contours -> c /@ Range – Bob Hanlon Dec 13 '18 at 14:57
• @Sid use FrameLabel -> {"x", "y"}to add axis names. To save, put the pointer on the image and press the right mouse button. A window will open, choose Save Graphics As, window will open with a choice of 14 formats. – Alex Trounev Dec 13 '18 at 15:39