Studi Mikroskopis Batuan dari Sungai Aranio Kalimantan Selatan dengan Metode Petrografi

Done observation petrography to detect colour, structure, texture, mineral composition and rock classification. Rock sample that taken from Aranio River, South Kalimantan as much as 4 (four) samples, made to be thin slice measures 6 cm x 3 cm x 3 mm use rock clipper dan rock slice refiner. Rock thin slice is analyzed by means of polarization microscope. Analysis result petrography mentions that any sample amphibolites rocks (hornblende sekis) that belong in faces metamorphic rock. Two samples among others textured grano-lepidoblastic and poikiloblastic, while two textured another samples granolepidoblastic and textured lepidoblastic and poikiloblastic. Crystal size from rock samples amphibolites revolve from 0,40 mm until 0,80 mm, has lineation structure (crystal instruction) and clear colour up to muddy greenness. This rock principal mineral composition consists of amphibole (34 – 60 %), quartz (22 – 44 %), plagioclase (4 – 14 %), biotitic (1 %), epidotic (4 – 10 %), garnet (1 – 2 %), cyanide (1 – 6 %) and pyroxene (2 %); addition mineral consists of oxide iron (1 – 3 %) and calcite (6%)