Magma Evolution of Lasem and Senjong Volcanic Complex: High-K Magmatism in Sunda Arc, Indonesia
Penulis/Author
Dr. Ir. Agung Harijoko, S.T., M.Eng., IPM. (1); Dr. Ir. Haryo Edi Wibowo, S.T., M.Sc. (2); MRADIPTA LINTANG ALIFCANTA MOKTIKANANA (3); MOHAMMAD YAZID ABDILLAH (4)
Tanggal/Date
1 2022
Kata Kunci/Keyword
Abstrak/Abstract
Lasem and Senjong Volcanic Complex (LSVC) is one of four Quaternary volcanic complexes with highK
magmatism
distributed
in
the
northern
coast
of
central
part
of
Java
Island.
This
research
aims
to
understand
the
magmatic
evolution
of
the
volcanic
complex.
Morphostratigraphy
analysis
combined
with
field
observation
shows
12
pyroclastic
density
flow
units
in
Lasem
Volcano,
distributed
mainly
in
the
northern
to
eastern
flanks
but
minor
occurrences
in
the
southern
and
western
flanks.
Meanwhile,
nine
lava flow units of Lasem are concentrated on the southern flank of the volcano. Lasem
stratovolcano is attributed to four lava domes distributed on the northern and southern flank. Senjong
Volcano comprises one lava flow and four lava domes.
Rocks of LSVC are composed of plagioclase, K-feldspar, hornblende, clinopyroxene, and opaque
minerals embedded in the groundmass of volcanic glass and microlite. These calc-alkaline rocks range
from basaltic trachyandesite to trachyte in composition. The magma of LSVC can be further grouped
into High K/Rb and Low K/Rb types, which dominate the Lasem and Senjong Volcanoes products,
respectively. These two magma types consistently show divergent trends in K/Rb and Rb/Nb plots
against increasing silica, indicating distinct differentiation processes of similar magma source.
Rumpun Ilmu
Teknik Geologi
Bahasa Asli/Original Language
English
Level
Internasional
Status
Dokumen Karya
No
Judul
Tipe Dokumen
Aksi
1
673-3732-1-PB.pdf
[PAK] Full Dokumen
2
TURNITIN-Magma Evolution of Lasem and Senjong Volcanic Complex_ High-K Magmatism in Sunda Arc, Indonesia.pdf
[PAK] Cek Similarity
3
Surat Keterangan Publikasi-Magma Evolution of Lasem and Senjong Volcanic Complex High K Magmatism in Sunda Arc, Indonesia.pdf
Dokumen Pendukung Karya Ilmiah (Hibah, Publikasi, Penelitian, Pengabdian)
4
Bukti korespondensi Lasem_opt.pdf
[PAK] Bukti Korespondensi Penulis
5
Full Dokumen_Magma Evolution of Lasem and Senjong Volcanic Complex_ High-K Magmatism in Sunda Arc, Indonesia.pdf
