THE INITIAL MARINE TRANSGRESSION IN THE GIPPSLAND BASIN, VICTORIA

1964 ◽  
Vol 4 (1) ◽  
pp. 125 ◽  
Author(s):  
J. Barry Hocking ◽  
David J. Taylor
Keyword(s):  
Marine Sediments ◽  
Tertiary Structures ◽  
Marine Transgression ◽  
South Eastern ◽  
Lower Tertiary ◽  
Tasman Sea ◽  
Gippsland Basin ◽  
Coal Measures

The Gippsland Basin of south-eastern Victoria is considered as the depositional area of Tertiary sediments lying beneath the Gippsland Plains and extending southwards beneath the Tasman Sea. This area is bounded by Mesozoic and Palaeozoic rocks.The initial marine transgression across the landward extent of the basin appears to have commenced in uppermost Eocene to lowermost Oligocene times. The nature of the initial marine Tertiary sedimentation is controlled by:four regional lower Tertiary structures—the Woodside-Seaspray Deep, the Baragwanath Anticline, the Lake Wellington Trough, and the Lakes Entrance Platform; andthe nature of the rocks upon which these sediments were deposited.Because of the progressive onlap in some areas, particularly on the Baragwanath Anticline, the initial marine transgression is diachronous.The initial marine Tertiary sediments—constituting the Lakes Entrance Formation (as redefined in this paper)—can be divided into two broad lithological units, a lower sandy one and an upper marly one. Oil traces have been recorded in the basal sands throughout the basin, particularly in the Lakes Entrance area where minor production was undertaken during the 1930s.The offshore areas of the basin appear to have the greatest oil potential. The prospective reservoir beds would be the offshore extensions of the hasal marine Tertiary sands, or else offshore marine equivalents of the Latrobe Valley Coal Measures (which underlie the marine sediments in all but the Lakes Entrance Platform area)—provided that these beds have not been flushed by artesian waters.

STRUCTURAL INHERITANCE, STRESS ROTATION, OVERPRINTING AND COMPRESSIONAL REACTIVATION IN THE GIPPSLAND BASIN—TUNA 3D SEISMIC DATASET

2003 ◽  
Vol 43 (1) ◽  
pp. 197 ◽  
Author(s):  
M.R. Power ◽  
K.C. Hill ◽  
N. Hoffman
Keyword(s):  
Oil And Gas ◽  
Seafloor Spreading ◽  
Northern Margin ◽  
Stress Rotation ◽  
Tasman Sea ◽  
Basement Fault ◽  
Effective Seal ◽  
Gippsland Basin ◽  
Deep Exploration ◽  
East West

In the Tuna area, Turonian rifting between Australia and the Lord Howe Rise produced extensive irregular NE–SE to ENE–WSW trending Emperor Subgroup depocentres by oblique reactivation of inherited Early Cretaceous Strzelecki Group and Palaeozoic basement fault geometries. Santonian Tasman seafloor spreading rotated the stress vectors clockwise so that NE–SW Emperor Subgroup syn-rift depocentres were abandoned and more easterly trends were reactivated. This developed the Proto-Rosedale Fault across the northern margin as a complex series of branching fault splays with reactivated ENE–WSW trending segments and new east– west hard linkages. In the Late Cretaceous, extension vectors rotated a further 45o clockwise sympathetic to NW–SE trending Tasman Sea mid oceanic ridges. ENE– WSW trending splays of the Proto-Rosedale Fault became abandoned and overprinted by new Maastrichtian NW–SE trending segments perpendicular to the NE–SW stress field. By the Paleocene these segments had linked, displaying en echelon geometries above the obliquely reactivated Proto-Rosedale Fault. Tasman seafloor spreading and fault-controlled subsidence in Gippsland had finished by the Early Eocene. Extension was punctuated by Coniacian-Santonian, Eocene and Oligocene compressive pulses that inverted abandoned splays of the Proto-Rosedale Fault forming the Tuna faulted anticline oil and gas traps.The Santonian-Campanian Proto-Rosedale Fault and other similarly oriented structures are promising fairways for deep exploration. Attractive reservoir targets include stacked braided fluvial channel sands of the Golden Beach Subgroup deposited along NE–SW to ENE–WSW trending segments of the Proto-Rosedale Fault. Anticlinal traps developed during multiple Cretaceous and Tertiary compressive phases. Campanian dykes, sills and flows are prevalent in the Golden Beach section and offer the potential for effective seal as seen in the Kipper field.

FISSION TRACK THERMOCHRONOLOGY: APPLICATION TO CONTINENTAL RIFTING OF SOUTH-EASTERN AUSTRALIA

1991 ◽  
Vol 31 (1) ◽  
pp. 131 ◽  
Author(s):  
T. A. Dumitru ◽  
K. C. Hill ◽  
D. A. Coyle ◽  
I. R. Duddy ◽  
D. A. Foster ◽  
...  
Keyword(s):  
Thermal History ◽  
Fission Track ◽  
Apatite Fission Track ◽  
South Eastern ◽  
Tasman Sea ◽  
Eastern Australia ◽  
Uplift And Erosion ◽  
Track Analysis ◽  
Plate Type ◽  
South Eastern Australia

Over the last five to ten years, apatite fission track analysis has developed into a sophisticated technique for studying the low-temperature thermal history of rocks. It has particular utility in oil exploration because its temperature range of sensitivity, about 20° to 125°C, overlaps the oil generation window. Whereas older fission track thermal history approaches relied solely on the sample fission track age, the new interpretive approaches use sample age, single grain age and track length data. They also emphasise the analysis of systematic variations in data patterns in sequences of samples, such as samples from various depths in a well. Laboratory study of the thermal annealing of fission tracks and compilation of fission track data from geological case studies has greatly improved our understanding of apatite fission track systematics, allowing considerably more detailed interpretations of thermal histories.Application of apatite fission track analysis to the rifted continental margins of south-eastern Australia shows that rifting and separation of Australia from Antarctica and the Lord Howe Rise were accompanied by at least 1.5-3 km of uplift and erosion along the Tasman Sea and Bass Strait coasts. Uplift and erosion were much less 100 km or so inland. This shows that the uplift of the south-eastern Australian margins was caused by the continental rifting process, the same process that initiated major subsidence in the sedimentary basins in Bass Strait. The consistent fission track data patterns around south-eastern Australia suggest a generally similar tectonic setting for the Tasman Sea and Bass Strait parts of the margin. Lister et al. (in press) propose that the Tasman part of the margin is an upper plate type of margin that formed above a west-dipping detachment zone. The fission track data suggest that the Bass Strait part of the margin may also be of upper plate type.

Initiation of the Northumberland basin

1971 ◽  
Vol 108 (6) ◽  
pp. 511-516 ◽  
Author(s):  
M. R. Leeder
Keyword(s):  
Structural Feature ◽  
Alkali Basalt ◽  
Upper Devonian ◽  
The South ◽  
Marine Transgression ◽  
South Eastern ◽  
Basin Subsidence

SummaryA north-easterly palaeoslope is demonstrated for the south-eastern Scottish Borders during the Upper Devonian. Alkali basalt extrusion in the (?basal) Tournaisian was followed by initiation of the Northumberland basin as a structural feature. Basin subsidence gave rise to a south-easterly palaeoslope in the Southern Uplands and was coincident with the mid-Tournaisian marine transgression.

scholarly journals Characterisation and correlation of Tertiary seismostratigraphic units in the Roer Valley Graben

2002 ◽  
Vol 81 (2) ◽  
pp. 159-166 ◽  
Author(s):  
J.W. Verbeek ◽  
C.S. de Leeuw ◽  
N. Parker ◽  
Th.E. Wong
Keyword(s):  
Marine Sediments ◽  
Well Logs ◽  
Lower Tertiary ◽  
Complex Development ◽  
Roer Valley Graben ◽  
German Part

AbstractWithin the Cenozoic sedimentary section of the Roer Valley Graben ten seismostratigraphic units have been identified. They are closely related to the lithological framework which makes it possible to recognize diem also on well logs in this region. The Lower Tertiary seismic units, representing mainly marine sediments, have a uniform development mat can be correlated over large distances into the German part of the Roer Valley Graben. The marine to continental Upper Tertiary and Quaternary seismic units display a more complex development due to lateral facies changes (including prograding delta systems) and rift tectonics.

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