Rare earth element geochemistry of the zigzag - Klondyke Sedimentary Rock Formations: Clues to the evolution of the Baguio Mineral District (Luzon), Philippines

Tomas A. Tam, Graciano P. Yumul, Estephanie Gera L. Ramos, Carla B. Dimalanta, Mei Fu Zhou, Shigeyuki Suzuki

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Petrographic analysis of the Oligocene-Miocene Zigzag Formation and Miocene Klondyke Formation of the Baguio Mineral District reveals a transitional arc source for the former and an undissected arc source for the latter. Whole rock geochemistry of these sedimentary rock formations show affiliation of the Zigzag Formation to active continental margin whereas the Klondyke Formation appears to have been derived from an oceanic island arc source. A different aspect of the geology of the district is further gleaned from the whole rock rare earth element geochemistry of these rocks. Samples from the Zigzag Formation are characterized by higher REE concentrations compared to the Klondyke Formation samples. The REE data indicate that the sedimentary rocks of the Klondyke Formation had geochemically-less fractionated igneous lithologies as their progenitor whereas the older Zigzag Formation was derived from a more differentiated source. This new set of information contributes to the understanding of the evolution of this district from a marginal basin to an island arc setting.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalResource Geology
Volume55
Issue number3
DOIs
Publication statusPublished - Jan 1 2005

Keywords

  • Baguio
  • Philippines
  • REE geochemistry
  • Sedimentary formations

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

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