The exploration of deeply buried deposits in covered terrains has become increasingly critical. China's diverse covered areas, ranging from arid zones like the Gobi Desert to semi-humid grasslands, pose significant challenges for the concealed mineral exploration due to varied overburden materials. Soil gas geochemistry, as a DeepPenetrating Geochemistry method, has recently demonstrated strong potential for capturing signals related to concealed ores. However, its effectiveness in exploring concealed sediment-hosted Au deposits in the semi-humid regions remains uncertain. This study evaluates the effectiveness of multi-component gas surveys (HQS, SOQ, COQ, CH4) at the Zhaishang Au deposit. The results revealed significant gas anomalies or peaks correlating well with ore zones and mineralized alteration, detectable across two distinct covered layers (loess and grasslands) and sediment-hosted rocks. The concealed sulfide-rich ore deposit directly release gases, supplemented by gases from other sources such as microbial activity. HQS and SOQ emerged as key indicators, along with COQ and CH4 for detecting deep mineralization. Organic materials in different overburden materials exerted limited influence on CH4 anomalies. Consequently, CH4 interpretation requires caution due to potential external non-mineralized sources (e.g., biogenic emissions). Gas intensities and morphology of gas anomalies clearly reflected the size of ore bodies and fault structures beneath thick overburden. A conceptual model illustrates gas migration from deep mineralization to the surface via faults, fractures, and micropores. These results demonstrate soil gas geochemistry as a viable tool for detecting sediment-hosted gold deposits in semi-humid covered terrains, such as loess and grassland.