The volcanic record in the ANDRILL McMurdo Ice Shelf AND-1B drill core

• Main Authors: Pompilio, M., Kyle, P., Wilch, T., Dunbar, N., ANDRILL-MIS Project Science Team
• Other Authors: Pompilio, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia, Kyle, P.; Department of Earth & Environmental Science, N.M. Institute of Mining and Technology, Socorro, Wilch, T.; Department of Geological Science, Albion College, Albion, United States, Dunbar, N.; New Mexico Bureau of Geology and Mineral Resources, N.M. Institute of Mining and Technology, Socorro, ANDRILL-MIS Project Science Team; http://www.andrill.org/support/references/appendixc.html, Cooper, A., Raymond, C., ISAES Editorial Team, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia, Department of Earth & Environmental Science, N.M. Institute of Mining and Technology, Socorro, Department of Geological Science, Albion College, Albion, United States, #PLACEHOLDER_PARENT_METADATA_VALUE#, http://www.andrill.org/support/references/appendixc.html
• Format: Other/Unknown Material
• Language: English
• Published: U.S. Geological Survey and The National Academies 2007
• Subjects: ANDRILL; volcanic record; 04. Solid Earth::04.08. Volcanology::04.08.05. Volcanic rocks; McMurdo Ice Shelf; McMurdo Sound; Ice Shelf
• Online Access: http://hdl.handle.net/2122/3318; https://doi.org/10.3133/of2007-1047

he 1285 m thick MIS core offers an invaluable opportunity to obtain a detailed record of volcanism in McMurdo Sound. Volcanic stratigraphy and preliminary petrologic data on volcanic rocks in the AND-1B core are reported here. Remarkable volcanic deposits include: a) a phonolitic pumice layer found at ≈85 mbsf which is not correlated to any known vent onshore; b) a black well sorted volcanic sands succession (132.83 to 146.79 mbsf) interpreted as being derived mainly from subaerial Hawaiian/Strombolian eruptions; c) a thick volcanic succession in the middle part of the core with an interbedded submarine lava flow. The flow may be derived from a nearby (≈4 km) vent on the seafloor according to average length of the lavas with similar composition; d) deeply altered tuffs and minor sandstone below 1220 mbsf. Diagenesis and intense alteration at depths >600 mbsf, hamper the interpretation of magma evolution and provenance. U.S. Geological Survey and The National Academies Published Santa Barbara USA 3.5. Geologia e storia dei sistemi vulcanici open