Porphyry　copper　systems　contain　porphyry　Cu,　skarn,　carbonate-replacement　and　epithermal　deposits,　and　presently　supply　nearly　all　the　Te　and　Se,　and　have　the　potential　to　produce　Co　as　by-product　in　the　future.　However,　few　studies　have　investigated　the　distribution　of　Co,　Te,　and　Se　in　the　specific　porphyry-skarn　deposit.　Detailed　mineralogical　and　geochemical　analyses　were　conducted　to　investigate　the　distribution　of　Co,　Te,　and　Se　across　porphyry,　skarn,　and　carbonate-replacement　ore　types　in　the　Tonglvshan　porphyry-skarn　Cu-Fe-Au　deposit,　Eastern　China.　The　early　sulfide　stage　in　three　ore　types　is　characterized　by　Co-bearing　pyrite　(Py1a,　Co　up　to　1.3　wt%)　+　droplet-like　tetradymite　±　hessite　±　cattierite.　The　texture　transition　from　coarse-grained,　pore-free　to　porous　Py1a　in　porphyry　and　skarn　type　ores　suggests　a　shift　from　stable　physico-chemical　conditions　to　gentle　fluid　boiling,　resulting　in　the　precipitation　of　Co-　and　Te-bearing　minerals.　In　contrast,　fine-grained　euhedral　Py1a　in　carbonate-replacement　type　ores　implies　rapid　cooling　from　high-temperature　fluid　interaction　with　marble.　The　late　sulfide　stage,　which　only　occurs　in　skarn　and　carbonate-replacement　type　ores,　is　characterized　by　Co-rich　pyrite　(Py2)　+　carrollite　+　hessite　+　Bi-sulfosalts.　In　skarn　type　ores,　tetradymite-kawazulite　solid　solution　(TKSS)　+　hessite　+　native　Te　+　naumannite　reflects　intense　boiling,　leading　to　an　increase　in　fO2　and　pH　that　precipitates　Py2b　(Co　up　to　19.2　wt%)　and　carrollite,　while　Te　and　Se　may　precipitate　through　vapor　phase　condensation.　Conversely,　the　presence　of　fine-grained　carrollite,　zoned　Py2a,　sphalerite,　and　galena　in　carbonate-replacement　type　ore　suggests　that　rapid　cooling　and　increasing　pH,　resulting　from　fluid　mixing,　played　a　significant　role　in　the　precipitation　Co　and　Te.　Furthermore,　the　porous　texture　resulting　from　coupled　dissolution-reprecipitation　(CDR)　during　the　late　sulfide　stage　also　provided　favorable　conditions　for　the　formation　of　micro-nano　sized　critical　metal　particles.　©　2024　The　Authors