Part 1. East Autralian margin and the western marginal basins: The relationship between structures on the southeast Australian margin and in the Tasman Sea

Ringis, J.

doi:10.1071/eg975039

Cited by 10 publications

(5 citation statements)

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“…The absence of epicenters in Figure 11 Figure 11). Nevertheless, the overall strike of the continental margin of eastern Australia differs from that of spreading centers in the Tasman Sea by about 450-50 ø [Ringis, 1975]. More northerly spreading centers in the Tasman Sea are offset progressively to the east in an en echelon pattern.…”

Section: Cleary and Simpsonmentioning

confidence: 97%

Intraplate seismicity, reactivation of preexisting zones of weakness, alkaline magmatism, and other tectonism postdating continental fragmentation

Sykes¹

1978

Reviews of Geophysics

670

295

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The distribution of intraplate earthquakes and of igneous rocks postdating continental rifting is summarized and placed into a plate tectonic framework for the following continental areas: eastern and central North America, Africa, Australia, Brazil, Greenland, Antarctica, Norway, Spitsbergen, India, and the margins of the Red Sea and Gulf of Aden. In continents, intraplate earthquakes tend to be concentrated along preexisting zones of weakness within areas affected by the youngest major orogenesis that predates the opening of the present oceans. Many preexisting zones of weakness (including fault zones, suture zones, failed rifts, and other tectonic boundaries), particularly those near continental margins, were reactivated during the early stages of continental separation. In contrast, intraplate shocks rarely occur within the older oceanic lithosphere or within the interiors of ancient cratonic blocks of the continents. In several continental areas, rocks and tectonic features postdating the opening of present‐day oceans, including carbonatites, kimberlites, other alkalic rocks, mafic dikes, and ring dikes, as well as some of the largest intraplate shocks, seem to be located preferentially along old zones of weakness near the ends of major oceanic transform faults that were active in the early opening of adjacent oceans. In several places, alkaline magmatism and earthquakes extend several hundred kilometers inland from the ends of oceanic transform faults (but not necessarily with the same strike as the transform fault). Major preexisting zones of weakness that are oriented subparallel to the directions of relative continental separation appear to control the locations of transform faults that develop in a new ocean. In some instances, alkaline magmatism persisted along reactivated features of this type for as long as 100 m.y. after the initial stages of continental fragmentation. Most kimberlites in South Africa seem to have been emplaced along preexisting zones of weakness that were reactivated during the early opening of the South Atlantic. The type of intraplate magmatism appears to be related to the thickness of the lithosphere. Unlike oceanic transform faults where large horizontal movements have occurred, reactivated zones of weakness in continents usually appear to have been the sites of only relatively small displacement. Seismic activity and alkaline magmatism may be controlled by deep fractures that penetrated the entire lithosphere to tap asthenospheric sources of magma. Seismic activity along these zones seems to occur in response to the present‐day stress regime, which is not necessarily the same as that which was active during the emplacement of the alkaline rocks. Other intraplate shocks are concentrated along old zones of weakness that are subparallel to continental margins. Such shocks are found in the Appalachians, northeastern and northern Greenland, Norway, Great Britain, Spitsbergen, northern Canada, and Australia. These zones of weakness were also reactivated during continental separation...

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Section: Cleary and Simpsonmentioning

confidence: 97%

Intraplate seismicity, reactivation of preexisting zones of weakness, alkaline magmatism, and other tectonism postdating continental fragmentation

Sykes¹

1978

Reviews of Geophysics

670

295

View full text Add to dashboard Cite

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“…If the fault at Bingi Bingi is an R shear related to this transform fault it should be inclined at about 10° to the transform fault and it should have the same sense of transform movement. The attitude of the fault has been calculated as 065 azimuth, dipping 78°n orthwest and this and its sinistral nature is compatible with the transform faulting which lies west of the Tasman Sea spreading ridge (Ringis, 1975) (Fig. 1).…”

Section: Kinematics Speculationsmentioning

confidence: 59%

“…1. Location of the Bingi Bingi fault showing transform directions in the Tasman Sea (Ringis, 1975) and the solutions for the secondary palaeostress field (0,03) speculated to be operating during fault activation. Brown, 1928;Halford, 1970).…”

Section: B Katzmentioning

confidence: 99%

“…Conjugate Riedel (R') shears are developed at higher angles (80°) to the main fault and display the opposite sense of displacement. P shears are oriented approximately symmetrical to The transform fault in the Tasman Sea offshore from the area has a trend of about 075 azimuth (Ringis, 1975). If the fault at Bingi Bingi is an R shear related to this transform fault it should be inclined at about 10° to the transform fault and it should have the same sense of transform movement.…”

Section: Kinematics Speculationsmentioning

confidence: 99%

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Analysis of a small-scale fault at Bingi Bingi, N.S.W., and speculations on its relationship to a large-scale transform fault of the Tasman Sea

Katz¹

1987

Journal and Proceedings of the Royal Society of New South Wales

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South of Moruya, at Bingi Bingi Point, N.S.W., a NW trending aplite dyke of the Devonian Tuross Head Complex has been sinistrally drag folded by a ENE steeply dipping fault. A structural analysis of the faulted, drag folded dyke provides a preliminary solution that speculates by scale transfer, that the fault may be part of a Riedel shear system related to movements along a transform fault developed during the opening of the Tasman Sea which subsequently controlled later mafic dykes emplaced during the rifting of Australia from Antarctica.

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“…Hopkins (1967). Basin subsidence was strongly influenced by Tasman Sea seafloor spreading about 70Myr ago (Ringis 1975;Shaw 1978 Kantsler et al (1978) for the Snapper 1 offshore well. The present-day geothermal gradient is approximately 34°C km-', assuming a sea-bed temperature of 10°C.…”

Section: G I P P S L a N D B A S I Nmentioning

confidence: 99%

Tectonic history from vitrinite reflectance

Middleton

1982

Geophysical Journal International

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The degree of organic metamorphism of carbonaceous matter is expressed in terms of the reflectance of vitrinite. Vitrinite reflectance is a function of temperature and time. A model relating vitrinite reflectance to temperature and time is proposed from published vitrinite reflectancetemperature-time nomograms. A plot of the logarithm of vitrinite reflectance versus depth gives a linear curve (for vitrinite reflectance greater than 0.3 per cent) in a sedimentary basin which has had a constant geothermal gradient throughout its tectonic history; the geothermal gradient ("C km-') is equal to the slope of the curve multiplied by 194.8. The model is also applied to sedimentary basins with decreasing geothermal gradient with time (i.e. cooling continental-margin basins). The vitrinite reflectance model is demonstrated to be consistent with observed reflectance data and tectonic information from the Sydney, Bowen-Surat and Gippsland basins in eastern Australia.

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Part 1. East Autralian margin and the western marginal basins: The relationship between structures on the southeast Australian margin and in the Tasman Sea

Cited by 10 publications

References 0 publications

Intraplate seismicity, reactivation of preexisting zones of weakness, alkaline magmatism, and other tectonism postdating continental fragmentation

Intraplate seismicity, reactivation of preexisting zones of weakness, alkaline magmatism, and other tectonism postdating continental fragmentation

Analysis of a small-scale fault at Bingi Bingi, N.S.W., and speculations on its relationship to a large-scale transform fault of the Tasman Sea

Tectonic history from vitrinite reflectance

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