Currently,　pyrophyllite　is　one　of　the　most　important　raw　materials　for　a　variety　of　new　functional　products.　In　China,　hydrothermal　pyrophyllite　constitutes　a　significant　proportion.　Therefore,　enhancing　the　genesis　model　of　hydrothermal　pyrophyllite　deposit　is　essential　for　ensuring　a　long-term　stable　supply　of　industrial　raw　materials　for　the　manufacturing　industry　focused　on　new　functional　materials.　This　study　involved　a　systematic　profile　survey　and　sampling　at　the　Jialiangshan　pyrophyllite　deposit.　The　TESCAN　integrated　mineral　analyzer　(TIMA),　electron　probe　micro-analysis　(EPMA)　and　laser　ablation　inductively　coupled　plasma　mass　spectrometry　(LA-ICP-MS)　were　utilized　to　quantitatively　determine　the　mineral　composition　and　elemental　characteristics　of　alteration　minerals.　Mineral　assemblages　in　different　ores　were　analyzed　to　determine　their　genesis　conditions　based　on　the　result　of　alteration　zoning　results.　The　elemental　composition　of　clay　minerals　including　pyrophyllite,　diaspore,　sericite　and　kaolinite　were　specifically　determined　to　understand　the　elemental　behavior　during　the　alteration　process.　Results　from　field　investigation　and　quantitative　analysis　indicate　that　the　alteration　assemblage　within　the　Jialiangshan　pyrophyllite　deposit　exhibits　spatial　distribution,　characterized　by　a　gradual　decrease　in　alteration　temperature　from　the　crater　outwards.　Our　study　suggests　that　the　formation　of　Jaliangshan　pyrophyllite　deposit　is　linked　to　volcanic　activity　followed　by　an　extended　sequence　of　hydrothermal　alteration　processes.　Following　extensive　alteration,　element　migration　between　surrounding　rock　and　the　hydrothermal　fluid　resulted　in　large-scale　pyrophyllite　deposits　for　industrial　raw　materials.　The　conditions　necessary　for　the　forming　artefact　pyrophyllite　within　the　ore-body　are　more　stringent;　the　hydrothermal　fluid　should　be　unsaturated　with　SiO2　at　temperatures　maintained　between　273　and　370　°C　along　with　fractures　providing　space　for　growth.　©　2025　China　University　of　Geosciences.　All　rights　reserved.