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Depositordc.contributorKalnins, Lara
Funderdc.contributor.otherNERC - Natural Environment Research Councilen_UK
Funderdc.contributor.otherThe Royal Society of Edinburghen_UK
Funderdc.contributor.otherCSIRO Marine National Facilityen_UK
Funderdc.contributor.otherAustralian Geographic
Funderdc.contributor.otherGeological Society of London
Funderdc.contributor.otherJeremy Willson Charitable Trust
Funderdc.contributor.otherInterRidge
Funderdc.contributor.otherMarine Geoscience Organisation of Australia
Spatial Coveragedc.coverage.spatialCoral Seaen_UK
Spatial Coveragedc.coverage.spatialTasman Seaen_UK
Spatial Coveragedc.coverage.spatialAUen
Spatial Coveragedc.coverage.spatialAUSTRALIAen
Data Creatordc.creatorKalnins, Lara
Data Creatordc.creatorRichards, Frederick
Data Creatordc.creatorWatts, Anthony
Data Creatordc.creatorCohen, Benjamin
Data Creatordc.creatorBeaman, Robin
Date Accessioneddc.date.accessioned2018-09-03T09:13:28Z
Date Availabledc.date.available2018-09-03T09:13:28Z
Citationdc.identifier.citationKalnins, Lara; Richards, Frederick; Watts, Anthony; Cohen, Benjamin; Beaman, Robin. (2018). The Morphology of the Tasmantid Seamounts: Interactions Between Tectonic Inheritance and Magmatic Evolution, [dataset]. University of Edinburgh. School of GeoSciences. https://doi.org/10.7488/ds/2430.en
Persistent Identifierdc.identifier.urihttps://hdl.handle.net/10283/3174
Persistent Identifierdc.identifier.urihttps://doi.org/10.7488/ds/2430
Dataset Description (abstract)dc.description.abstractData associated with the publication: Richards, F. D., L. M. Kalnins, A. B. Watts, B. E. Cohen, & R. J. Beaman. (2018). The morphology of the Tasmantid Seamounts: Interactions between tectonic inheritance and magmatic evolution. In revision at Geochemistry, Geophysics, Geosystems. Paper Abstract: Basement structure is known to exert strong magmatic and morphological control on continental volcanoes, but relatively little is known about the structural control of submarine volcanoes. Here we investigate the morphology of the Tasmantid Seamounts, a >2400 km long chain of age-progressive intraplate volcanoes, ranging from 56 to 7 Ma. The seamounts are emplaced over the extinct Tasman Sea spreading centre, which was active between 84 and 52 Ma. While thick sediment (∼1 km) obscures much of the basement, detailed morphological and geophysical analyses of the seamounts reveal a strong correlation between tectonic setting, seamount orientation, and volcanic structure, despite the ≥20 Ma interval between spreading cessation and seamount emplacement. Seamounts emplaced on fracture zones or spreading segment-transform fault inside corners are typically large and elongate. Where original morphology is preserved, they often appear rugged and predominantly fissure-fed. By contrast, comparatively smooth, conical seamounts with isolated dyke-fed flank cones are often found mid-segment and at outside corners. Volcanic fabrics also align closely with the expected principal stress directions for strong mechanical coupling across transform faults. This behaviour suggests the lithosphere is dissected by numerous deep faults, channelling magma along pre-existing structural trends. Generally low effective elastic thicknesses (<10 km) and lack of correlation with plate age at emplacement suggest that structural inheritance is also a major control on lithospheric strength near the extinct spreading centre. Our study clearly demonstrates that, like in the continents, structural inheritance in oceanic lithosphere can exert significant control on the morphology of submarine volcanoes.en_UK
Languagedc.language.isoengen_UK
Publisherdc.publisherUniversity of Edinburgh. School of GeoSciencesen_UK
Relation (Is Referenced By)dc.relation.isreferencedbyhttps://doi.org/10.1029/2018GC007821en_UK
Relation (Is Referenced By)dc.relation.isreferencedbyKalnins, L, Richards, F, Watts, A, Cohen, B & Beaman, R 2018, 'The Morphology of the Tasmantid Seamounts: Interactions Between Tectonic Inheritance and Magmatic Evolution' Geochemistry, Geophysics, Geosystems. DOI: 10.1029/2018GC007821
Rightsdc.rightsCreative Commons Attribution 4.0 International Public Licenseen
Sourcedc.sourceVoyage TMD2012 (ss2012_v07) data, http://mnf.csiro.au/Research-outcomes/Data.aspx [Cohen, 2012. Voyage Summary ss2012_v07 Tasmantid Seamounts: volcanic, tectonic, and carbonate record (TMD2012).]en_UK
Sourcedc.sourcegbr100, Great Barrier Reef and Coral Sea bathymetry, https://www.deepreef.org/bathymetry/65-3dgbr-bathy.html [Beaman, 2010. Project 3D-GBR: A high-resolution depth model for the Great Barrier Reef and Coral Sea. Marine and Tropical Sciences Research Facility Project 2.5i.1a Final Report.]en_UK
Sourcedc.sourceSandwell and Smith marine free-air gravity anomaly data, http://topex.ucsd.edu/marine_grav/mar_grav.html [Sandwell and Smith, 2009. Global marine gravity from retracked Geosat and ERS-1 altimetry: Ridge Segmentation versus spreading rate. Journal of Geophysical Research., 114, B01411, doi:10.1029/2008JB006008.]en_UK
Sourcedc.sourceFROGTECH Pty Ltd Phanerozoic OZ SEEBASE sediment thickness database, https://data.gov.au/dataset/26e0fbd9-d8d0-4212-be52-ca317e27b3bden_UK
Sourcedc.sourceTotal sediment thickness of the World’s Oceans & Marginal Seas, version 2, https://www.earthbyte.org/total-sediment-thickness-of-the-worlds-oceans-marginal-seas-version-2/ [Whittaker et al, 2013. Global sediment thickness data set updated for the Australian-Antarctic Southern Ocean. G-cubed, 14(8), 3297–3305.]en_UK
Titledc.titleThe Morphology of the Tasmantid Seamounts: Interactions Between Tectonic Inheritance and Magmatic Evolutionen_UK
Typedc.typedataseten_UK

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