Thesis PhD

The Geochemistry of The Neogene Halmahera Arc, Eastern Indonesia

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The Geochemistry of the Neogene Halmahera Arc, Eastern Indonesia examines the major, trace, and rare earth element characteristics of Neogene volcanic and plutonic rocks from the Halmahera island arc in eastern Indonesia to constrain magma sources and tectonic setting. The study evaluates geochemical signatures indicative of subduction-related magmatism, including enrichment in large-ion lithophile elements and depletion in high-field-strength elements, reflecting mantle wedge metasomatism by slab-derived fluids and melts. Variations in elemental ratios and isotopic compositions are used to infer magma evolution processes such as partial melting, fractional crystallization, and crustal assimilation, as well as temporal changes linked to the complex Neogene tectonic evolution of the Halmahera Arc. The results contribute to a better understanding of arc magmatism in eastern Indonesia and provide insights into regional tectonic reconstruction and mineralization potential.

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Availability

Detail Information

Series Title

Natural Science

Call Number

6NAT72

Publisher

: London University., 1997

Collation

267 pages

Language

English

ISBN/ISSN

-

Edition

-

Subject(s)

Geology

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