The Linglong Gold Deposit is the representative deposit in the Jiaodong Peninsula. Its hydrothermalalteration is closely related to gold mineralization. This study investigates element migration patterns during hydrothermalalteration and their controlling mechanisms on gold precipitation using micro⁃X⁃ray fluorescence spectroscopy（Micro⁃XRF）, principal component analysis（PCA）, and whole⁃rock geochemistry. The results show that: ①The K⁃feldsparalteration stage is characterized by enrichment in Al, K, and Si and depletion in Ca and Na, during which plagioclase isreplaced by K⁃feldspar accompanied by the formation of chlorite. ②The sericitization stage involves the influx of K andthe leaching of Si and Ca, where feldspar decomposes to form sericite and quartz. ③The pyrite⁃sericite alteration stagemarks the key phase of gold enrichment, during which Fe and Cu precipitate as sulfides, destabilizing［Au（HS）₂］⁻complexes and triggering gold release. Principal component analysis reveals the spatial zoning of alteration:PC1（41.0 %）represents the potassic alteration stage, and PC2（22.5 %）corresponds to the sulfide mineralizationstage. The study further proposes that the interaction between pyritization and acidic hydrothermal fluids drives a cyclicprocess of "fluid-rock interaction-sulfide precipitation-gold enrichment". The combination of Micro⁃XRF and PCAenables precise interpretation of overlapping alteration signals, offering high⁃resolution technical support for dynamicmodeling of hydrothermal mineralizing systems. These findings provide important insights for deep prospecting andmetallogenic mechanism research in the Jiaodong Gold Deposit.