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Nested calderas and trapdoor uplift at Pantelleria, Strait of Sicily

1983; Geological Society of America; Volume: 11; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(1983)11 2.0.co;2

1943-2682

Gail A. Mahood, Wes Hildreth,

Maritime and Coastal Archaeology

Research Article| December 01, 1983 Nested calderas and trapdoor uplift at Pantelleria, Strait of Sicily Gail Mahood; Gail Mahood 1Department of Geology, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar Wes Hildreth Wes Hildreth 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Author and Article Information Gail Mahood 1Department of Geology, Stanford University, Stanford, California 94305 Wes Hildreth 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1983) 11 (12): 722–726. https://doi.org/10.1130/0091-7613(1983)11 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Gail Mahood, Wes Hildreth; Nested calderas and trapdoor uplift at Pantelleria, Strait of Sicily. Geology 1983;; 11 (12): 722–726. doi: https://doi.org/10.1130/0091-7613(1983)11 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Pantelleria is dominated by a caldera 6 km in diameter that formed 55,000 yr ago during eruption of a rheomorphic fall deposit that is zoned from pantellerite to trachyte. Trachytic lavas then built a shield that nearly filled the caldera. Magma subsequently reinflated the shallow reservoir and raised the northwest half of the trachyte shield 275 m, creating Montagna Grande by trapdoor uplift. The lid eventually failed, and pantellerite magma erupted as domes, flows, and pumice cones along the trapdoor faults and their hingeline. We have identified a second caldera ∼93,000 yr old, within which the younger caldera is nested; a still-older structure may encircle them both. Replenishment of magma reservoirs beneath calderas can promote dilatant reactivation of older subsidence structures, resulting in multicyclic collapses that reuse these structures and produce nested calderas. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.