| High sulphidation or Sulfuric acid (alunite( | Low sulphidation or Adularia-sericite | The study area (South of Takestan( |
Tectonic position | arc Islands and continental margins | rich type of Sulfur in arc Islands and continental margins and weak type of Sulfur in traction conditions in arcs as well as post-orogenic nditions | continental margins Continental volcanic arc, Urmia- Dokhtar zone |
Volcanic stones | Mainly andesite and rhyodacite | Andesite, rhyodacite, rhyolite | Andesite, trachyandesite |
Alteration zones | With cross and clear expansion | With low and non-clear expansion | Low to moderate expansion |
The key alteration minerals | crystallized Alunite on the surface and pyrophyllite in the deep | Cervisitis or illite + adularia, Rose colitis in deposits associated with alkaline stones and in some cases chlorite | Alunite in Argillic-alunite zone, adularia has also been observed |
Quartz | Fine and bulk, Fine and bulk, mainly with succession origin | Chalcedony or quartz with cortex species, chloroform, blade, Chasma Filling Kakadu | Coarse and crystallized with Gulf texture and Geodetic and Kakadu, also in form of fine and substitution |
Other tailings | Barite with great expansion which is combined with mineral, Chasma filling sulfur is present | Barite of fluorite exists locally and barite can be found at the top of mineralized mass | Quartz, Sericitization, clay |
Sulfide minerals’ values | 10 to 90% Volume percentage, mainly fine and some form of pyrite layer | 1 to 20% Volume percentage, but mainly less than 5% Volume percentage , pyrite | 4 to 6% Volume percentage, mainly pyrite |
The key sulfide minerals | copper Sulphosalts (Enargite) and copper and copper-iron sulfides (chalcocite, covellite, bornite) are common and are formed after pyrite | Sphalerite, galena and tetrahedrite are common. Copper is present mainly as chalcopyrite. | Copper, mainly as chalcopyrite and colitis along with pyrite |
Existing metals | Cu, Au, As (Ag, Pb) | Au or Ag (Cu, Pb, Zn) | Cu, Fe, Au, Ag, Mo |
Metals that are topical | BI, SB, Mo, Sn, Zn, Te(Hg) | Sb, As (Te, Se, Hg) | Hg, AS |
The ratio of sulfur to metal in sulfide minerals | up | down | up |
Nature of the fluid deposit mechanism | Acidic, rich in sulfur and oxides | Neutral, pitch of sulfur and redox | Acidic, rich in sulfur and oxides |
The source of fluid deposit mechanism | Mainly with magmatic fluid | Mainly containing meteoric water | ainly magmatic hydrothermal fluids and meteoric fluids |
Association with porphyry deposits | Gold deposits have been formed in upper parts of copper-gold deposits and porphyry copper molybdenum and simultaneously with these deposits (West Pacific arc islands, Philippines and Central Andes, Chile) | Gold deposits around porphyry copper deposits in the Philippines | Gold mineralization associated with copper in the upper part and the possible presence of porphyry copper in below and greater depths |