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Tuffaceous mud is a volumetrically important volcaniclastic facies of submarine arc volcanism and record of climate change
journal contribution
posted on 2023-05-19, 17:58 authored by Gill, JB, Bongiolo, EM, Miyazaki, T, Hamelin, C, Martin JutzelerMartin Jutzeler, DeBari, S, Jonas, A-S, Vaglarov, BS, Nascimento, LS, Yakavonis, MThe inorganic portion of tuffaceous mud and mudstone in an oceanic island arc can be mostly volcanic in origin. Consequently, a large volume of submarine volcaniclastic material is as extremely finegrained as products of subaerial eruptions (<100 μm). Using results of IODP Expedition 350 in the Izu rear arc, we show that such material can accumulate at high rates (12–20 cm/k.y.) within 13 km of the nearest seamount summit and scores of km behind the volcanic front. The geochemistry of bulk, acid-leached mud, and its discrete vitriclasts, shows that >75% of the mud is volcanic, and that most of it was derived from proximal rear arc volcanic sources. It faithfully preserves integrated igneous geochemical information about arc evolution in much the same way that terrigenous shales track the evolution of continental crust. In addition, their high sedimentation rate enables high resolution study of climate cycles, including the effects of Pleistocene glaciation on the behavior of the Kuroshio Current in the Shikoku Basin south of Japan.
History
Publication title
Geochemistry Geophysics GeosystemsVolume
19Issue
4Pagination
1-27ISSN
1525-2027Department/School
School of Natural SciencesPublisher
Amer Geophysical UnionPlace of publication
2000 Florida Ave Nw, Washington, USA, Dc, 20009Rights statement
Copyright 2018 American Geophysical UnionRepository Status
- Restricted