Bingham, Robert George

Corr, Hugh F.J.

Ferraccioli, Fausto

Jordan, Tom A.

Le Brocq, Anne M.

Leat, Philip T.

Rippin, David M.

Ross, Neil

Siegert, Martin J.

Tectonophysics

English

The Weddell Sea Rift was a major focus for Jurassic extension and magmatism during the early stages of Gondwana break-up and underlies the Weddell Sea Embayment, which separates East Antarctica from a collage of crustal blocks in West Antarctica. Newly-collected aerogeophysical data over the catchments of Institute and Möller ice streams reveal the inland extent of the Weddell Sea Rift against the Ellsworth-Whitmore block and a hitherto unknown major left-lateral strike slip boundary between East and West Antarctica. Aeromagnetic and gravity anomalies define the regional subglacial extent of Proterozoic basement, Middle Cambrian rift-related volcanic rocks, Jurassic intrusions and sedimentary rocks of inferred post-Jurassic age. 2D and 3D magnetic depth-to-source estimates were used to help constrain joint magnetic and gravity models for the region. The models reveal that Proterozoic crust similar to that exposed at Haag Nunataks, extends southeast of the Ellsworth Mountains to the margin of the Coastal Basins. Thick granitic Jurassic intrusions are modelled at the transition between the Ellsworth-Whitmore block and the thinner crust of the Weddell Sea Rift and within the Pagano Shear Zone. The crust beneath the inland extension of the Weddell Sea Rift is modelled as being either ~ 4 km thinner compared to the adjacent Ellsworth-Whitmore block or as underlain by an up to 8 km thick mafic underplate

Bingham, Rob G.

le Brocq, Anne

NERC Open Research Archive

Inland extent of the Weddell Sea Rift imaged by new aerogeophysical data

Tom A. Jordan

Fausto Ferraccioli

Neil Ross

Hugh F.J. Corr

Philip T. Leat

Rob G. Bingham

David M. Rippin

Anne le Brocq

Martin J. Siegert

Crossref

The Open University

A review of geological constraints on the pre-break-up position of the Ellsworth Mountains within Gondwana: implications for Weddell Sea evolution,

A window on West Antarctic crustal boundaries: the junction between the Antarctic Peninsula, The Filchner Block, and the Weddell Sea oceanic lithosphere.

Aerogravity evidence for major crustal thinning under the Pine Island Glacier region (West Antarctica).

Aeromagnetic and Radio Echo Ice-Sounding Measurements Show Much Greater Area of the Dufek Intrusion,

Aeromagnetic data from the southern Weddell Sea embayment and adjacent areas: synthesis and interpretation,

Aeromagnetic exploration over the East Antarctic Ice Sheet: a new view of the Wilkes Subglacial Basin.

Age of pre-break-up Gondwana magmatism.

Airborne Gravity

Airborne gravity and precise positioning for geologic applications.

Airborne gravity over Lake Vostok and adjacent highlands of East Antarctica.

An active mantle mechanism for Gondwana breakup.

Antarctic crustal thickness from satellite gravity: Implications for the Transantarctic and Gamburtsev Subglacial Mountains.

Antarctica: glaciological and geophysical folio.

Approximating edges of source bodies from magnetic or gravity anomalies.

ASTER GDEM validation using LiDAR data over coastal regions of Greenland.

Bedmap: a new ice thickness and subglacial topographic model of Antarctica.

Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models,

Cambrian palaeomagnetic data confirm a Natal Embayment location for the Ellsworth-Whitmore Mountains, Antarctica, in Gondwana reconstructions.

Characteristics and recognition of strike-slip fault systems, in:

Collaborative aerogeophysical campaign targets the Wilkes Subglacial Basin, the Transantarctic Mountains and the Dome C region, in:

Combined U-Pb geochronology and Hf isotope geochemistry of detrital zircons from early Paleozoic sedimentary rocks,

Continent–ocean transition and voluminous magmatic underplating derived from P-wave velocity modelling of the East Greenland continental margin.

Correlation of gabbroic and diabasic rocks from the Ellsworth Mountains, Heart Hills, and Thiel Mountains,

Crustal structure of the area around Haag Nunataks, West Antarctica: new aeromagnetic and bedrock elevation data. ,

Crustal structure of the Filchner-Ronne shelf and Coats Land, Antarctica, from gravity and magnetic data: Implications for the breakup of Gondwana.

Detecting rift basins in the Evans Ice Stream region of West Antarctica using airborne gravity data.

Draping corrections for aeromagnetic data: line versus grid-based approaches.

Early Neoproterozoic magmatism (1000–910 Ma) of the Zadinian and Mayumbian Groups (Bas-Congo): onset of Rodinia rifting at the western edge of the Congo craton.

East Antarctic rifting triggers uplift of the Gamburtsev Mountains.

Enhancing potential field data using filters based on the local phase.

Eotvos corrections for airborne gravity.

Form and extent of the Dufek intrusion, Antarctica, from newly compiled aeromagnetic data

Geochemistry, and Tectonic Setting of Granitic Rocks From the Ellsworth- Whitmore Mountains Crustal Block and Thiel Mountains,

Geochronology of Neoproterozoic syn-rift magmatism in the Yangtze Craton, South China and correlations with other continents: evidence for a mantle superplume that broke up Rodinia.

Geodetic versus geophysical perspectives of the gravity anomaly.

Geologic controls on the initiation of rapid basal motion for the West Antarctic ice streams: a geophysical perspective including new airborne radar sounding and laser altimetry results., in:

Geological significance of regional magnetic anomalies in Coats Land and Western Dronning Maud Land.

Geomagnetic Activity and its Implications for the Aeromagnetic Survey in North in:

Geophysical images and a crustal model of intrusive structures beneath the Messum ring complex, Namibia. Earth and Planetary Science Letters.

Geophysical imaging of the shape of granitic intrusions at depth: a review, in:

Gondwana breakup and plate kinematics: Business as usual.

Gravity mapping in the Southern Weddell Sea Region. (Explanatory note for free-air and Bouguer anomalies maps).

Igneous petrology and geochemistry of the Southern Heritage Range, Ellsworth Mountains, West Antarctica, in:

Insights into the magmatic architecture of the Oslo Graben by petrophysically constrained analysis of the gravity and magnetic field.

Interpretation of aeromagnetic data from the Ellsworth Mountains-Thiel Mountains ridge, West Antarctica.

Late Gondwanide tectonic rotations within Gondwanaland.

Lessons regarding aeromagnetic surveys during magnetic disturbances in polar regions.

Linking the Wilkes Subglacial Basin, the Transantarctic Mountains, and the Ross Sea with a new airborne gravity survey, in:

Magallanes-Fagnano continental transform fault (Tierra del Fuego, southernmost South America).

Magnetic source parameters of two-dimensional structures using extended Euler deconvolution.

Magnetic susceptibility and geochemistry of Variscan West Carpathian granites: implications for tectonic setting.

Measurement of gravity at sea and in the air.

Mechanics of V-shaped conjugate strike-slip faults and the corresponding continuum mode of continental deformation.

Mesozoic and Cenozoic extensional tectonics of the West Antarctic Rift System from high-resolution airborne geophysical mapping.

Microlevelling procedures applied to regional aeromagnetic data: an example from the Transantarctic Mountains (Antarctica).

Middle Cambrian volcanism in the Ellsworth Mountains: Implications for paleo-Pacific margin tectonics.

Middle Jurassic within-plate granites in west Antarctica and their bearing on the break-up of Gondwanaland.

New aerogeophysical survey targets the extent of the West Antarctic Rift System over Ellsworth Land,

New boundary conditions for the West Antarctic Ice Sheet: subglacial topography beneath Pine Island Glacier.

On the Extent of the Active West Antarctic Rift System.

On the long distance transport of Ferrar magmas, in: Thomson,

Outline of the structural and tectonic history of the Ellsworth Mountains-Thiel Mountains ridge,

Plumes, orogenesis, and supercontinental fragmentation.

Pluton shapes in the Cornubian Batholith: new perspectives from gravity modelling.

Potential field tilt—a new concept for location of potential field sources.

Potential Theory in Gravity and Magnetic Applications.

Radarsat Antarctic Mapping Project digital elevation model version 2. National Snow and Ice Data Center,

Rapid computation of gravitational attraction of threedimensional bodies of arbitrary shape.

Rb-Sr geochronology of the region between the Antarctic Peninsula and the Transantarctic Mountains: Haag Nunataks and Mesozoic granitoids, in:

Regional aeromagnetic anomalies in Ellsworth Land: Crustal structure and Mesozoic microplate boundaries within West Antarctica.

Rifting process and thermal evolution of the continental margin of Eastern Canada determined from subsidence curves.

Short note: A new estimate of the adopted gravity value at Rothera Station, Antarctic Peninsula.

Steep reverse bed slope at the grounding line of the Weddell Sea sector in West Antarctica. Nature Geoscience,

Structure and Mesozoic evolution of the eastern Weddell Sea, Antarctica: history of early Gondwana break-up,

Structure and origin of southern Weddell Sea crust: results and implications,

Structure and origin of the Earth's crust in the Weddell Sea Embayment (beneath the front of the Filchner and Ronne Ice Shelves) from deep seismic sounding data.

Subglacial geology in Coats Land, East Antarctica, revealed by airborne magnetics and radar sounding.

Summary of palaeomagnetic results from West Antarctica: implications for the tectonic evolution of the Pacific margin of Gondwana during the Mesozoic,

Tectonic environment of shale-hosted massive sulphide Pb-Zn-Ag deposits of Proterozoic northeastern Australia.

Tectonic history of the Ellsworth Mountains, West Antarctica: Reconciling a Gondwana enigma.

tectonic patterns over the Northern Victoria Land sector of the Transantarctic Mountains from new aeromagnetic imaging.

The 3-D geometry of the Linglong granitic complex from 2-D gravity forward modeling, Shandong Province, east China.

The Analytic Signal of Two-Dimensional Magnetic Bodies with Polygonal Cross-Section: Its Properties and Use for Automated Anomaly Interpretation.

The continental margin of Queen Maud Land, Antarctica: seismic sequences, structural elements and geological development.

The continental margin off East Antarctica between 10°W and 30°W,

The Ellsworth Mountains: Critical and enduringly enigmatic, in:

The Grenville Province within Antarctica: a test of the SWEAT hypothesis.

The location of mantle plume centres during the initial stages of Gondwana break-up.

The magnetic susceptibility of granitic rocks as a proxy for geochemical composition: Example from the Saruhan granitods,

The new gravity system - Changes in international gravity base values and anomaly values.

The rapid calculation of potential anomalies.

The role of mantle plumes in continental breakup: case histories from Gondwanaland.

The structure of West Antarctica from geophysical studies.

Weddell triple junction: The principal focus of Ferrar and Karoo magmatism during initial breakup of Gondwana.

Werner deconvolution for automated magnetic interpretation and its refinement using Marquardt inverse modeling.

Inland extent of the Weddell Sea Rift imaged by new aerogeophysical data

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