Petrogenetic interpretation of granitoid rocks using multicationic parameters in the Sanggau Area, Kalimantan Island, Indonesia

Kyaw Linn Zaw(1*), Lucas Donny Setijadji(2), I Wayan Warmada(3), Koichiro Watanabe(4)

(*) Corresponding Author


Granitoid rock compositions from a range of tectonic environments are plotted on a multicationic diagram, based on major and trace element geochemistry and K-Ar dating. This shows that there is a different tectonic nature, rock affinity and suites. The basement granitoid rocks are ranging from diorite to granite composition. They appear to the products of crystallization differentiation of a calc-alkaline magma of island affinity and range to metaluminous granites, granodiorite and tonalite. The tectonic setting has two kinds which are subduction and post-subduction. The geochemical interpretation, origin and melting of mechanism and tectonic setting shows the types of granitoid are M and I-M type. The basement of granite and granodiorite are a segment of island arc that were happened the Sintang Intrusion as post subduction or syn-collision tectonic setting.

Keywords: Petrogenetic, tectonic, affinity, Sintang Intrusion, Kalimantan

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Copyright (c) 2022 Kyaw Linn Zaw, Lucas Donny Setijadji, I Wayan Warmada, Koichiro Watanabe

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