Journal article
Spatio-temporal evolution of a dispersed magmatic system and its implications for volcano growth, Jeju Island Volcanic Field, Korea
M Brenna, SJ Cronin, IEM Smith, YK Sohn, R Maas
Lithos | ELSEVIER SCIENCE BV | Published : 2012
Abstract
Jeju Island is the emergent portion of a basaltic volcanic field developed over the last c. 1.8Ma on continental crust. Initial volcanism comprised dispersed, small-volume (<0.01km 3) alkali basaltic eruptions that incrementally constructed a tuff pile. Lavas and scoria from continuing small-scaled monogenetic volcanism capped this foundation. From c. 0.4Ma large-volume (>1km 3) eruptions began, with lavas building a composite shield. Three magma suites can be recognized: Early Pleistocene high-Al alkali (HAA), and Late Pleistocene to Holocene low-Al alkali (LAA) and subalkali (SA). The chemical similarity between small-volume and primitive large-volume eruptions suggests analogous parent ma..
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Awarded by Massey University
Funding Acknowledgements
Chang Woo Kwon and Jeon Yong Mun provided assistance during fieldwork; Ritchie Sims, John Wilmshurst and Ashlea Wainwright helped with analytical work. Gabor Kereszturi provided ASTER DEM volume of Jeju. Discussion with and comments by Karoly Nemeth, Bob Stewart, Richard Price, Gert Lube, Georg Zellmer and Ting Wang are appreciated. Critical reviews by Richard Price and Madalyn Blondes greatly improved the manuscript. Nelson Eby is thanked for editorial handling. SJC and IEMS are grateful for support from the NZ Ministry of Science and Innovation (formerly FRST) project MAUX0808 "Facing the challenge of Auckland volcanism". MB is also supported by a Massey University Vice-Chancellor's Doctoral Scholarship, and YKS by a National Research Foundation of Korea (NRF) grant (No. 2009-0079427).