Hydrothermal Alteration Terminology (Terminologi dalam Alterasi Hydrothermal)

Salam geologi gan, kali ini ane mau sharing tentang ore system sama kumpulan mineralnya, sama istilah yang ada pada suatu ore system. Jadi, mungkin bisa memudahkan agan-agan untuk mendeterminasi suatu kasus terutama tentang alterasi, apakah sistem tersebut masuk ke salah satu ore system yang ane sharing. Kali ini ane coba sharing dari terminology alterasi hydrothermal karya mas Gifkin

Generic terminology	Kumpulan mineral alterasi	Ore system
Argilic Advance argilic Intermediate argilic Phyllic (atau sericitic) Sericitic (or phllic) Propylitic (or sasussuritization) Potassic Greisen Skarn Calcic skarn (or tactite) Magnesian skarn Retrograde skarn jasperoid	Kaolinite (or halloysite, or dikite) + montmorillonite ± sericite (or muskovit) ± klorit Pyrophyllite + kaolinite (or dickite) ± quartz ± sericite ± andalusite ± diaspore ± alunite ± topaz ± zunyite ± energite ± tourmaline ± pyrite ± chalcopyrite ± hematite Chlorite + sericite ± kaolinite ± montmorillonite ± illite-smectite ± calcite ± epidote ± biotite ± pyrite Sericite + quartz + pyrite ± biotite ± chlorite ± rutile ± leucoxene ± chalcopyrite ± illite Sericite + quartz + pyrite ± K-feldspar ± biotite ± calcite ± dolomite ± chlorite ± andalusite ± chloritoid ± albite ± pyrrhotite Epidote (or zoisite or clinozoisite) + chlorite + albite ± carbontate ± sericite ± montmorillonite ± septachlorite ± apatite ± anhydrite ± ankerite ± hematite ± pyrite ± chalcopyrite K-feldspar (orthoclase) + biotite + quartz ± magnetite ± sericite (or muscovite) ± albite ± chlorite ± anhydrite ± apatite ± rutile ± epidote ± chalcopyrite ± bornite ± pyrite Muscovite (or sericite) + quartz + topaz ± tourmaline ± fluorite ± rutile ± cassiterite ± wolframite ± magnetite ± zunyte ± K-feldspar Pyroxene + garnet + wollastonite ± epidote (or zoisite) ± actinolite-tremolite ± vesuvianite ± pyrite ± chalcopyrite ± sphalerite Forsterite + diopside + serpentine + talc ± actinolite-tremolite ± calcite ± magnetite ± hematite ± chalcopyrite ± pyrite ± sphalerite Calcite + chlorite ± hematite ± pyrite Quartz + pyrite + hematite	Porphyry Cu, high and low sulfidation epithermal, geothermal Porphyry Cu, high-sulphidation epithermal, geothermal Porphyry Cy, high-sulphidatoin epithermal Porphyry Cu Porphyry Cu, Low sulphidation epithermal, geothermal, VHMS, sediment hosted massive sulphide Porphyry Cu, high-sulphidation epithermal, low-sulphidation epithermal, geothermal Porphyry Cu Porphyry Cu, porphyry Sn Porphyry Porphyry, skarn  Porphyry, skarn Sedimented-hosted Au, VHMS

Namun, sebagai interpretasi awal, kita seharusnya melihat formasi batuan yang ada di suatu daerah tersebut gan, supaya kita tau apa faktor penyebab dari suatu ore system tersebut, supaya kita lebih mudah mendeterminasi kira-kira ore system apa yang cocok untuk daerah kasus yang kita hadapi. semoga bermanfaat