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封面故事：华南陆块均衡剩余重力异常图。中国地质调查局于2016年设立了针对我国资源、能源重要基地、重大地质边界和关键构造单元的深部地质调查工程。华南陆块是欧亚板块的重要组成部分, 也是我国矿产资源“大粮仓”。利用卫星布格重力计算获得了华南陆块的均衡剩余重力异常, 通过高程和壳幔密度差叠加反演了均衡深度异常。这对厘定正均衡剩余重力异常区的幔源金属矿床, 寻找负均衡异常区的壳源金属矿床, 以及关注均衡深度异常过渡带或梯度带的地震活动研究, 提供了来自地球深部的科学依据。这项由中国地质科学院严加永研究团队取得的相关成果, 详见本专辑744-754页。（图片提供：严加永）
Cover Story：The image shows residual isostatic gravity anomalies in the South China block. In 2016, the China Geological Survey developed a deep geo-logical survey project targeting important areas for resources and energy, major geological boundaries, and key structural units in China. The South China block is an important part of the Eurasian Plate, and is also the "granary" of Chinese mineral resources. The residual isostatic gravity anomalies of the South China continental block were obtained from satellite Bouguer anomalies, and isostatic difference of crustal thickness was calculated by elevation and crust- mantle density differences. This research pro-vides a scientific basis from the deep earth to determine mantle- source metal deposits in posi-tive isostatic residual gravity anomalies, crust-source metal deposits in negative anomalies, and the study of seismic activity focusing on the transition or gradient zones of isostatic differ-ences of crustal thickness. The research achievement was led by Professor YAN Jia-yong, CAGS. For details, see pp. 744-754 of this issue. (Image by YAN Jia-yong)
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