The spatial and temporal evolution of strain during the separation of Australia and Antarctica

  title={The spatial and temporal evolution of strain during the separation of Australia and Antarctica},
  author={Philip Ball and Graeme Eagles and Cynthia J. Ebinger and Ken R. McClay and Jennifer M. Totterdell},
A re‐evaluation of existing onshore and offshore gravity, magnetic, seismic reflection, and well data from the Australo‐Antarctic margins suggests that magmatism and along‐strike lithospheric heterogeneities have influenced the localization of initial rifting. The 3‐D crustal architecture of the Australian and Antarctic margins, which formed during multiple rifting episodes spanning ∼80 Myr, reveal local asymmetries along strike. Rift structures from the broad, late Jurassic (165–145 Ma) rift… 

Tectonomagmatic evolution of the final stages of rifting along the deep conjugate Australian‐Antarctic magma‐poor rifted margins: Constraints from seismic observations

The processes related to hyperextension, exhumed mantle domains, lithospheric breakup, and formation of first unequivocal oceanic crust at magma‐poor rifted margins are yet poorly understood. In this

Crustal Structure and Continent‐Ocean Boundary Along the Galicia Continental Margin (NW Iberia): Insights From Combined Gravity and Seismic Interpretation

The magma‐poor rifted continental margin of Galicia has an extremely complex structure. Its formation involved several rifting episodes that occurred ultimately during the early Cretaceous near a

Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin

Understanding the patterns and characteristics of sedimentary deposits on the conjugate Australian‐Antarctic margins is critical to reveal the Cretaceous‐Cenozoic tectonic, oceanographic, and

A crustal‐scale view at rift localization along the fossil Adriatic margin of the Alpine Tethys preserved in NW Italy

Fossil rifted margins, whereby originally extended continental crust is subsequently stacked in orogenic belts, provide the opportunity to track rift‐related tectonics across different crustal

Controls on the Thermomechanical Evolution of Hyperextended Lithosphere at Magma‐Poor Rifted Margins: The Example of Espirito Santo and the Kwanza Basins

High‐quality, long offset seismic data from many distal rifted margins show evidence for hyper‐extended, <10‐km‐thick crust. Direct observation of such domains is challenging as they lie, at great

India‐Elan Bank‐East Antarctica Breakup, Crustal Architecture, and Margin Evolution: Results From Constrained Potential Field and Process‐Oriented Gravity Modeling of Conjugate Margin Segments

We present here the results of a seismically well‐constrained potential field modeling along with process‐oriented gravity modeling across the Eastern Continental Margin of India (ECMI) and its

Control of Precambrian-to-Paleozoic orogenic trends on along-strike variations in Early Cretaceous continental rifts of the South Atlantic Ocean

The Early Cretaceous (135–130 Ma) continental rupture of Western Gondwana to form the South American and African plates closely paralleled the elongate trends of Precambrian and Paleozoic orogenic

Breaking up continents at magma-poor rifted margins: a seismic v. outcrop perspective

The break-up of continents at magma-poor rifted margins is a complex yet little understood process accounting for intricate interactions between tectonic and magmatic processes. Whereas

Rifts and Rifted Margins: A Review of Geodynamic Processes and Natural Hazards

This review provides an introduction to the geodynamic processes that influence tectonic rift evolution and rifted margin architecture. With a strong focus on numerical modeling, I summarize



Dominant symmetry of a conjugate southern Australian and East Antarctic magma‐poor rifted margin segment

Synthesis and modeling of published deep seismic and potential field data from the conjugate, magma‐poor, rifted margins of the Great Australian Bight, southern Australia, and central Wilkes Land,

Contrasted styles of rifting in the eastern Gulf of Aden: A combined wide‐angle, multichannel seismic, and heat flow survey

Continental rifts and passive continental margins show fundamental along‐axis segmentation patterns that have been attributed to one or a number of different processes: extensional fault geometry,

NE Atlantic continental rifting and volcanic margin formation

Abstract Deep seismic data from the Hatton-Rockall region, the mid-Norway margin and the SW Barents Sea provide images of the crustal structure that make it possible to estimate the relative amounts

The Structure of the Continental Margin off Wilkes Land and Terre Adélie Coast, East Antarctica

In 2001 and 2002, the Australian Government acquired approximately 9 000 km of high-quality geophysical data over the margin of East Antarctica between 110–142° E that provide a sound framework for

Structure and evolution of the eastern Gulf of Aden conjugate margins from seismic reflection data

The Gulf of Aden is a young and narrow oceanic basin formed in Oligo-Miocene time between the rifted margins of the Arabian and Somalian plates. Its mean orientation, N75°E, strikes obliquely (50°)

Formation and evolution of Australian passive margins: implications for locating the boundary between continental and oceanic crust

Australian passive margins display a large variety of styles, including narrow, wide, volcanic and non-volcanic margins. Their tectonic history has been complicated by tectonic reactivation and

A marine geophysical study of the Wilkes Land rifted continental margin, Antarctica

SUMMARY The Wilkes Land margin of East Antarctica, conjugate to the southern Australian margin, is a non-volcanic rifted margin that formed during the Late Cretaceous. During 2000–01 and 2001–02,

Nature of the continent-ocean transition on the non-volcanic rifted margin of the central Great Australian Bight

Abstract A region of 50–120 km width defines the continent-ocean transition (COT) in the central Great Australian Bight. It is characterized by a thin apron of post-break-up sediments overlying