The Correlation Between The Electromagnetic Induction Measurements And Pixel Values Associated With The "Great Ear" Rings In Lop Nur

This study explores the cause for the occurrence of the rings of the "Great Ear" based on the electromagnetic induction measurements using EM38 on the dry lake salt crusts of Lop Nur at different spatial scales. Preliminary results indicate that there is a clear variation pattern in the electromagnetic induction measurements and it corresponds well, at different spatial resolutions, with the pixel values of the "Great Ear" rings revealed by the Landsat imagery. They seem negatively correlated. The correlation coefficient for the 50 km transect is -0.6154 and the 40 km transect is -0.6891. It is suggested that the occurrence of the "Great Ear" rings on Landsat imagery is an indication of spatial zonal changes in salt and water contents, particle size, and other factors on the surface of the dry salt lake beds of Lop Nur.