Goldschmidt 2016 Abstract Magma Evolution of Volcanic Rocks of

Goldschmidt 2016 Abstract
Magma Evolution of Volcanic Rocks of Slamet
Volcano, Central Java, Indonesia: insight from
petrological and geochemical studies
Y.A. PRASETYA1*, M. ABDURRACHMAN2, M. AZIZ1,
H.K. HANDLEY3, F. SAPUTRA1
1
Departement of Geology, Jenderal Soedirman
University, Purbalingga 53371, Indonesia
(*Correspondance: [email protected])
2
Departement of Geology, Bandung Institute of
Technology, Bandung 40132, Indonesia
3
Departement of Earth and Planetary Science,
Macquarie University, Sydney, NSW 2109, Australia
Slamet Volcano is Quarternary Stratovolcano that located
in Central Java Province, Indonesia. Volcanostratigraphy of
Slamet volcano are divided into two stages, Old Slamet
(Basalt and Andesite) and Young Slamet (Basaltic Andesite),
[1]. Althought many geological studies of Slamet Volcano
have been presented by some researches, magmatic evolution
of each stages is still unclear. This study focusing on Young
Slamet products. These product comprise medium-K series of
basaltic andesite to andesite with high 87Sr/86Sr (0,7050190,705478) and low 143Nd/144Nd (0,512794-0,512807). Our
study show that magma evolution beneath Slamet Volcano is
attributed to magma mixing and assimilation with Australian
Granitic Rock (Fig. 1a) and Java Sediment (Fig 1b).
(a)
(b)
Figure 1: Sr/Nd isotopic mixing model, (a) with Australian
Granitic rock, (b) with Java Sediment.
[1]Vukadinovic & Sutawidjaja (1995), Journal of Southeast
Asia Earth Sience, vol 1, p. 135-164