STRATIGRAPHIC MODELLING OF THE GIPPSLAND BASIN

1991 ◽  
Vol 31 (1) ◽  
pp. 105 ◽  
Author(s):  
P. Feathers tone ◽  
T. Aigner ◽  
L. Brown ◽  
M. King ◽  
W. Leu
Keyword(s):  
Sedimentary Facies ◽  
Second Phase ◽  
Time Stepping ◽  
Subsidence History ◽  
Basin Subsidence ◽  
Tasman Sea ◽  
History Of ◽  
Break Up ◽  
Semi Empirical ◽  
Gippsland Basin

The Gippsland Basin is an asymmetric graben which initially formed during the break-up of Australia and Antarctica in the Early Cretaceous. During continental rifting the basin was filled by volcano-clastics of the Strzelecki Group. The overlying alluvial sediments of the Golden Beach Group represent a second phase of rift fill associated with the Tasman Sea rift. Following continental break-up in the Campanian, the Latrobe Group was deposited as a transgressive sequence of marine and coastal plain sediments. Thermal subsidence from the Oligocene to Recent was accompanied by the deposition of marine marls and limestones of the Lakes Entrance Formation and Gippsland Limestone.A north-south cross-section through the basin, based on regional seismic data and nine exploration wells, has been used to study the tectonic, thermal and basin-fill history. A detailed basin subsidence history based on a crustal rifting model was constructed, constrained by stratigraphic data and palaeo-water depth estimates at well locations. The history of sedimentation was then modelled by a Shell proprietary package, using the subsidence history and published eustatic sea level variations. This numerical model is based on a forward time-stepping scheme using semi-empirical algorithms to define the facies deposited. The gross basin architecture of the Gippsland Basin is successfully reproduced by the model. In addition the model details the timing and extent of marine incursions in the Golden Beach Group and the eustatic control on facies patterns in the Latrobe Group.The method has potential for predicting the sedimentary facies in undrilled parts of the Gippsland Basin and in frontier areas in general.

A NEW MODEL FOR THE MID-CRETACEOUS STRUCTURAL HISTORY OF THE NORTHERN GIPPSLAND BASIN

1991 ◽  
Vol 31 (1) ◽  
pp. 143 ◽  
Author(s):  
D.C. Lowry ◽  
I.M. Longley
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
Second Phase ◽  
Northern Flank ◽  
Tectonic History ◽  
Structural History ◽  
Intermittent Compression ◽  
History Of ◽  
Transfer Faults ◽  
Gippsland Basin

The tectonic history of the northern flank of the offshore Gippsland Basin can be divided into three phases:an Early Cretaceous rift phase (120-98 Ma) with deposition of the Strzelecki Group and extension in a northeast-southwest direction.a mid-Cretaceous phase (98-80 Ma) with deposition of the Golden Beach Group and extension in a northwest- southeast direction anda Late Cretaceous to Tertiary sag phase with intermittent compression or wrenching.Previous workers have described the first and third phases. This paper argues for a distinctive second phase with extension at right angles to the first phase. The complex Cretaceous structure in the Kipper-Hammerhead area is interpreted in terms of a model in which transfer faults of the first phase became domino faults of the second phase.

INITIAL REVIEW OF THE BIOSTRATIGRAPHY AND PETROLEUM SYSTEMS AROUND THE TASMAN SEA HYDROCARBON-PRODUCING BASINS

2006 ◽  
Vol 46 (1) ◽  
pp. 201
Author(s):  
R.A. Cook ◽  
E.M. Crouch ◽  
J.I. Raine ◽  
C.P. Strong ◽  
C.I. Uruski ◽  
...  
Keyword(s):  
New Zealand ◽  
Sequence Stratigraphy ◽  
Sedimentary Basin ◽  
Geological History ◽  
Petroleum Systems ◽  
Tasman Sea ◽  
Internal Structures ◽  
History Of ◽  
Gippsland Basin ◽  
Recent Refinement

Understanding the genesis and habitat of hydrocarbons in a sedimentary basin takes knowledge of that basin at many levels, from basic infill geology to petroleum systems, plays, prospects and detailed sequence stratigraphy. While geophysics can define the basins and their internal structures, biostratigraphy and paleogeography provide greater understanding of basin geology. Micropaleontology and palynology are the chief tools that we need to define both the environment and dimension of time.As an example, the reconstruction of the Tasman Sea region to the mid-Cretaceous (ca 120 Ma) shows that the hydrocarbon-producing Gippsland and Taranaki petroleum basins developed at similar latitudes and in similar geological contexts. Other basins within the region have been lightly explored and need evaluation as to the value of further exploration.As paleontology has developed separately in Australia and New Zealand, comparison of biostratigraphic zones and their chronostratigraphy is critical to understand the similarity or otherwise of the sedimentary record of the two regions. Recent refinement of the NZ timescale and comparative studies on Gippsland Basin wells by NZ paleontologists have provided some key insights that enable us to compare the geological history of both regions more closely, and to recognise similarities in petroleum systems that may enhance petroleum prospects on both sides of the Tasman Sea.

TECTONIC EVOLUTION OF THE GIPPSLAND BASIN AND HYDROCARBON POTENTIAL OF ITS LOWER CONTINENTAL SHELF

1993 ◽  
Vol 33 (1) ◽  
pp. 45 ◽  
Author(s):  
Maher Megallaa
Keyword(s):  
Continental Shelf ◽  
Tectonic Evolution ◽  
Hydrocarbon Exploration ◽  
Second Phase ◽  
The West ◽  
Tectonic Events ◽  
Tasman Sea ◽  
Tectonic Element ◽  
Gippsland Basin ◽  
Upper Slope

Tectonic evolution of the Gippsland Basin, par­ticularly for the 120 to 66 Ma period, is reviewed based on the interpretation of BMR Continental Mar­gin Seismic data and industry seismic and well infor­mation over the continental shelf. It is revealed that the eastern limit of the Early Cretaceous (120-97 Ma) rift is the Gippsland Rise—a new tectonic element. The Rise is part of a regional deep-seated metamor­phosed Palaeozoic lineament belonging to the Tasman Fold Belt upon which the Strzelecki Group onlapped from the west. Two newly-identified transfer fault zones named here, the Eastern Gippsland Margin Transform and the Cape Everard Transfer Fault, bound the rise from the east and the west respectively.In a second phase of rifting (97-80 Ma) the following tectonic events took place:A narrower rift was incised at the onset of this phase parallel to the initial rift; The Gippsland Rise became unstable;A new NW-SE tensional regime commenced;The Southern Platform collapsed (in the Cenomanian) and the Southern Ocean accessed the three Bass Strait basins; Towards the end of this episode (in the Campanian) the Southern Platform and the Gippsland Rise emerged, andThe Northern and Southern Grabens (new names) were incised in the Gippsland Rise connecting the newly formed Tasman Sea to the basin.Ingredients necessary for potential hydrocarbon exploration in the lower shelf and upper slope such as source, reservoirs, seal, trapping mechanism and re­charge do exist but require additional seismic and geological evaluation.

Depositional style and subsidence history of the Turpan Basin (NW China)

1999 ◽  
Vol 128 (1-2) ◽  
pp. 155-169 ◽  
Author(s):  
Lei Shao ◽  
Karl Stattegger ◽  
Wenhou Li ◽  
Bernd J Haupt
Keyword(s):  
Nw China ◽  
Turpan Basin ◽  
Subsidence History ◽  
History Of

Effects on insulin secretion and insulin action of a 48-h reduction of plasma free fatty acids with acipimox in nondiabetic subjects genetically predisposed to type 2 diabetes

2007 ◽  
Vol 292 (6) ◽  
pp. E1775-E1781 ◽  
Author(s):  
Kenneth Cusi ◽  
Sangeeta Kashyap ◽  
Amalia Gastaldelli ◽  
Mandeep Bajaj ◽  
Eugenio Cersosimo
Keyword(s):  
Type 2 Diabetes ◽  
Insulin Secretion ◽  
Family History ◽  
Second Phase ◽  
Β Cell ◽  
C Peptide ◽  
Hyperglycemic Clamp ◽  
History Of ◽  
Plasma Ffa

Elevated plasma FFA cause β-cell lipotoxicity and impair insulin secretion in nondiabetic subjects predisposed to type 2 diabetes mellitus [T2DM; i.e., with a strong family history of T2DM (FH+)] but not in nondiabetic subjects without a family history of T2DM. To determine whether lowering plasma FFA with acipimox, an antilipolytic nicotinic acid derivative, may enhance insulin secretion, nine FH+ volunteers were admitted twice and received in random order either acipimox or placebo (double-blind) for 48 h. Plasma glucose/insulin/C-peptide concentrations were measured from 0800 to 2400. On day 3, insulin secretion rates (ISRs) were assessed during a +125 mg/dl hyperglycemic clamp. Acipimox reduced 48-h plasma FFA by 36% ( P < 0.001) and increased the plasma C-peptide relative to the plasma glucose concentration or ΔC-peptide/Δglucose AUC (+177%, P = 0.02), an index of improved β-cell function. Acipimox improved insulin sensitivity (M/I) 26.1 ± 5% ( P < 0.04). First- (+19 ± 6%, P = 0.1) and second-phase (+31 ± 6%, P = 0.05) ISRs during the hyperglycemic clamp also improved. This was particularly evident when examined relative to the prevailing insulin resistance [1/(M/I)], as both first- and second-phase ISR markedly increased by 29 ± 7 ( P < 0.05) and 41 ± 8% ( P = 0.02). There was an inverse correlation between fasting FFA and first-phase ISR ( r2 = 0.31, P < 0.02) and acute (2–4 min) glucose-induced insulin release after acipimox ( r2 =0.52, P < 0.04). In this proof-of-concept study in FH+ individuals predisposed to T2DM, a 48-h reduction of plasma FFA improves day-long meal and glucose-stimulated insulin secretion. These results provide additional evidence for the important role that plasma FFA play regarding insulin secretion in FH+ subjects predisposed to T2DM.

Economic reasons for the break-up of Yugoslavia

2013 ◽  
Vol 46 (2) ◽  
pp. 263-273 ◽  
Author(s):  
Viachaslau Yarashevich ◽  
Yuliya Karneyeva
Keyword(s):  
Eastern Europe ◽  
Regional Disparities ◽  
Violent Conflict ◽  
South Eastern ◽  
History Of ◽  
South Eastern Europe ◽  
Break Up ◽  
Economic Imbalances

The history of Yugoslavia continues to attract academic attention more than twenty years after the violent break-up of this federative state. Analyzing why it happened can be instructive in dealing with many unsolved problems in the region. The article will argue that deteriorating economics triggered all other factors leading to eventual disintegration of Yugoslavia. Specifically, during the 1980s external and internal economic imbalances, coupled with substantial regional disparities, resulted in a situationwhichwas no longer acceptable to some constituent republics, especially the wealthier ones. Unfortunately, their secessionwas followed by a violent conflict which still resonates throughout South-Eastern Europe.

scholarly journals IODP Expedition 318: From Greenhouse to Icehouse at the Wilkes Land Antarctic Margin

2011 ◽  
Vol 12 ◽  
pp. 15-23 ◽  
Author(s):  
C. Escutia ◽  
H. Brinkhuis ◽  
A. Klaus ◽  
Keyword(s):  
Middle Eocene ◽  
Second Phase ◽  
Last Deglaciation ◽  
Ocean Drilling Program ◽  
Ocean Drilling ◽  
Integrated Ocean Drilling Program ◽  
Tectonic History ◽  
Wilkes Land ◽  
History Of

Integrated Ocean Drilling Program (IODP) Expedition 318, Wilkes Land Glacial History, drilled a transect of sites across the Wilkes Land margin of Antarctica to provide a long-term record of the sedimentary archives of Cenozoic Antarctic glaciation and its intimate relationships with global climatic and oceanographic change. The Wilkes Land drilling program was undertaken to constrain the age, nature, and paleoenvironment of the previously only seismically inferred glacial sequences. The expedition (January–March 2010) recovered ~2000 meters of high-quality middle Eocene–Holocene sediments from water depths between 400 m and 4000 m at four sites on the Wilkes Land rise (U1355, U1356, U1359, and U1361) and three sites on the Wilkes Land shelf (U1357, U1358, and U1360). <br><br> These records span ~53 million years of Antarctic history, and the various seismic units (WL-S4–WL-S9) have been successfully dated. The cores reveal the history of the Wilkes Land Antarctic margin from an ice-free “greenhouse” Antarctica, to the first cooling, to the onset and erosional consequences of the first glaciation and the subsequent dynamics of the waxing and waning ice sheets, all the way to thick, unprecedented "tree ring style" records with seasonal resolution of the last deglaciation that began ~10,000 y ago. The cores also reveal details of the tectonic history of the Australo-Antarctic Gulf from 53 Ma, portraying the onset of the second phase of rifting between Australia and Antarctica, to ever-subsiding margins and deepening, to the present continental and ever-widening ocean/continent configuration. <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.12.02.2011" target="_blank">10.2204/iodp.sd.12.02.2011</a>

Sign in / Sign up

Export Citation Format

Share Document