Geological history, chronology and mMagmatic evolution of Merapi

Ralf Gertisser*, Mary Ann del Marmol, Christopher Newhall, Katie Preece, Sylvain Charbonnier, Supriyati Andreastuti, H. Handley, Jörg Keller

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

14 Citations (Scopus)
214 Downloads (Pure)

Abstract

This chapter provides a synthesis of the geological history, chronology and magmatic evolution of Merapi. Stratigraphic field and geochronological data are used to divide Merapi into three main evolutionary stages and associated volcanic edifices (Proto-, Old and New Merapi) and eight broad volcano-stratigraphic units to characterise the eruptive activity and structural evolution of the volcano through time. Complementary petrological, geochemical and isotopic data are used to characterise the eruptive products of Merapi and shed light on the geochemical evolution and petrogenetic processes. The data indicate that the eruptive products of Merapi are mainly basaltic andesite of both medium-K and high-K type and support a two-stage petrogenetic model, where primary magmas are derived from a heterogenous, Indian Ocean MORB-like mantle source metasomatised by slab-derived components. Subsequently, these magmas are modified during transfer through the crust by complex magmatic differentiation processes, including contamination by carbonate rocks of the local upper crust. The available data indicate that, since ~ 1900 14C y BP, the lavas and pyroclastic rocks of Merapi are essentially of the high-K type and that regular geochemical variations with systematic shifts in whole rock SiO2 content occurred since at least the Late Holocene, although erupted magma compositions have remained broadly uniform since the mid-twentieth century.

Original languageEnglish
Title of host publicationMerapi Volcano
Subtitle of host publicationGeology, Eruptive Activity, and Monitoring of a High-Risk Volcano
EditorsR. Gertisser, V.R. Troll, T.R. Walter, I. Gusti Made Agung Nandaka, A. Ratdomopurbo
PublisherSpringer Nature
Chapter6
Pages137-193
Number of pages57
ISBN (Print)9783031150401
DOIs
Publication statusPublished - 2023

Publication series

NameActive Volcanoes of the World
ISSN (Print)2195-3589
ISSN (Electronic)2195-7029

Keywords

  • Chronology
  • Geochemistry
  • Isotope geochemistry
  • Magmatic evolution
  • Merapi
  • Merapi-type volcanism
  • Petrogenesis
  • Petrology
  • Stratigraphy
  • 2023 OA procedure

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