A Variogram Model Based on Spatial Decay of Gravity Anomaly Covariance. - Xie, Xiao-yu; Luo, Kai-xin; Cao, Ju-liang; Cai, Shao-kun; Yu, Rui-hang; Hu, Qi-qin; Guo, Yan; Yang, Bai-nan (Applied Geophysics: Bulletin of Chinese Geophysical Society, 2026)