Studi Mikroskopis Batuan dari Sungai Aranio Kalimantan Selatan dengan Metode Petrografi
Abstract: 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%).
Penulis: Raihul Janah
Kode Jurnal: jpfisikadd100120
