Sungai Mak deposit had been considered as porphyry copper deposit. However detail researchon this deposit has not been done. The object of this study is to reveal the mineralization characteristics of the Sungai Mak using core and outcrop samples. Chalcocite blanket that caused by second enrichment effectand quartz vein that caused by hydrothermal activity was confirmed. The alteration mineral of intrusive rock identified by thin section observation and XRD was quartz, chlorite, illite and pyrophyllite. From observation of thin section, hornblende and plagioclase was confirmed as rock forming mineral and these show porphyritic structure. SiO2 and K2O+Na2O diagram or TAS diagram shows that intrusive rock was granodiorite. Ore minerals consist of chalcopyrite, pyrite, bornite, digenite and covellite. From the three samples, gold mineralization was confirmed by X-ray Fluorescence Analysis. The result of plotted gold grade and copper grade show a positive relationship, similar to other porphyry copper deposit within Gorontalo area in Tomblilato district. By characteristic of combination of ore minerals, there are boundary of primary sulfide zone and intrusive rock in around 160 m from surface. Result of measurement of the gas-liquid two-phase fluid inclusions in quartz stock work(width1-3cm) show salinity of 2.4-17.8%, homogenization temperature 282-326ºC(mode value 320ºC). These resultsconfirm that Sungai Mak deposit is recognized as part of porphyry copper deposit.