Geochemical baseline refers to the natural change of chemical element concentration in the surface material of the earth, and is an important reference to distinguish natural and man-made environmental impacts. At present, the determination of geochemical baseline and related methods and technologies are the focus and difficulty of geochemical baseline research at home and abroad.

The website in the resources is an academic paper entitled "Study on the Determination Method of Geochemical Baseline —— Taking Panzhihua Area as an Example", which can be read online.