Carbon and strontium isotopes and global correlation of Cambrian Series 2-Series 3 carbonate rocks in the Keping area of the northwestern Tarim Basin, NW China

► New C and Sr isotopes of Cambrian Series 2-Series 3 from the Tarim Basin, NW China. ► Well-correlated C and Sr data with Laurentia, Siberia, South and North China. ► Good chemostratigraphy for the global correlation and subdivision of Cambrian.