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Genesis of Dacitic Magmatism at Batur Volcano, Bali, Indonesia : Implications for The Origins of Stratovolcano Calderas

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Batur is an active stratovolcano on the island of Bali, Indonesia, with a large, well-formed caldera whose formation is correlated with the eruption about 23,700 years ago of a thick ignimbrite sheet. Our study of the volcanic stratigraphy and geochemistry of Batur shows the formation of the caldera was signalled by a change in the composition of the erupting material from basaltic and andesitic to dacitic. The dacitic rocks are glassy, possess equilibrium phenocryst assemblages, and display compositional characteristics consistent with an origin by crystal-liquid fractionation from more mafic parent magmas in a shallow chamber, possibly at 1.5 km depth and 1070-1000 °C.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

PVG G.86-4

Penerbit

Bandung, Jawa Barat, Indonesia : Pusat Vulkanologi dan Mitigasi Bencana Geologi., 1986

Deskripsi Fisik

37 hlm.

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

Gunung Batur

Info Detail Spesifik

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Pernyataan Tanggungjawab

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Informasi Lainnya

Kode Wilayah

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Pulau Dan Lembar Peta

Lainnya

Provinsi

Aceh

Koordinat - Latitude

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Koordinat - Longitude

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Versi lain/terkait

Lampiran Berkas