Solid Earth Sciences(S)
Session Sub-categoryScience of the Earth's Interior & Tectonophysics
Session IDS-IT21
TitleDo plumes exist?
Short TitleDo plumes exist?
Main ConvenerNameHidehisa Mashima
AffiliationCenter for Obsidian and Lithic Studies, Meiji University
Co-Convener 1NameGillian R Foulger
AffiliationDurham University
Co-Convener 2NameDapeng Zhao
AffiliationDepartment of Geophysics, Tohoku University
Session LanguageEE
ScopeThe debate regarding whether anomalous volcanic areas on Earth's surface are fed by deep-mantle plumes is widely considered to be the most significant debate currently ongoing in Earth science. Not only does the debate touch on a fundamental aspect of how Earth works dynamically, but the subject is extraordinarily cross-disciplinary to an extent that probably few scientists fully realize. Sub-disciplines that can contribute to efforts to resolve the debate include sedimentology, palaeontology, tectonophysics, geochronology, volcanology, petrology, geochemistry, geothermal research, seismology, geodesy, electromagnetics and many others. In addition to the disciplines of Earth science, the plume debate provides a remarkable and thought-provoking subject for scientific philosophy and reflections on correct scientific methodology: (1) What exactly is a plume? People often change their definition of a plume a posteriori in order to fit their observations. (2) How can the plume- or the plate hypothesis be falsified? (3) Do Earth scientists tend to present only one possible interpretation of their data, or do papers reflect all possible interpretations? Unfortunately, the former is often the case. (4) Are published interpretations consistent with other data from the subject field area? Often they are not, and the inconsistencies are not sufficiently highlighted nor discussed. These issues are particularly useful for inducting students into correct scientific working. In summary, the debate provides enormously fertile ground for new, fundamental questions and cross-disciplinary research. This session welcomes studies of melting anomalies on Earth from the point of view of any sub-discipline. We also welcomes studies of geological phenomena which are attributed to mantle plumes, such as back-arc extension, plate motion, sedimentary basin formation and lithospheric uplift, and any other work that bears on this fascinating and challenging geological debate.
Presentation FormatOral and Poster presentation
Joint Session withAGU
Invited Authors
  • Gillian R Foulger (Durham University)
  • Hetu C. Sheth (Indian Institute of Technology Bombay)
Time Presentation No Title Presenter Abstract
Oral Presentation May 20 PM1
13:45 - 14:15 SIT21-01A plate model for distributed volcanism in the oceansGillian R Foulger Abstract
14:15 - 14:30 SIT21-02Recent marine magnetotelluric studies on hotspotsKiyoshi Baba Abstract
14:30 - 15:00 SIT21-03The Deccan Traps (India) and the mantle plume model: Overview and 2018 updateHetu C. Sheth Abstract
15:00 - 15:15 SIT21-04Post-orogenic unrooting and collapse in double suture systems: insights from the Western Dabie OrogenLiming Dai Abstract
Presentation No Title Presenter Abstract
Poster Presentation May 20 Core Time
SIT21-P01 Giant lava flows, giant dyke swarms: The Deccan Traps, India Hetu C. Sheth Abstract
SIT21-P02 The Setouchi high magnesium andesites never the evidence for plume-like active mantle upwelling for the Japan Sea opening Hidehisa Mashima Abstract
SIT21-P03 Pull-apart opening of the Japan Sea inferred from the body of geological evidene Hidehisa Mashima Abstract
SIT21-P04 Evidence for the low-pressure and -temperature origin of the Minami-Shimabara basalts in northwest Kyushu, southwest Japan Tajima Toshihiko Abstract
SIT21-P05 The genesis of the basalt-HMA association from Nagasaki in northwest Kyushu, southwest Japan Tajima Toshihiko Abstract