CONODONT COLOUR ALTERATION, THERMAL MATURATION AND THE GEOTHERMAL HISTORY OF THE CANNING BASIN, WESTERN AUSTRALIA

1984 ◽  
Vol 24 (1) ◽  
pp. 243 ◽  
Author(s):  
Robert S. Nicoll ◽  
John D. Gorter
Keyword(s):  
Heat Flow ◽  
Western Australia ◽  
Horizontal Distribution ◽  
Petroleum Exploration ◽  
Northern Margin ◽  
Canning Basin ◽  
Thermal Maturation ◽  
Oil Generation ◽  
History Of ◽  
Colour Alteration

Examination of conodont colour alteration (CAI) in samples from more than 40 petroleum exploration wells and extensive outcrop collections along the northern margin of the Lennard Shelf forms the basis for a study of the thermal maturation and geothermal history of the Canning Basin of Western Australia. The thickness of the measured CAI intervals is variable and does not conform to the 1200 m standard of the Appalachian Basin. The CAI interval 1 is thick and indicates a low geothermal gradient in the basin but CAI intervals 1.5 and 2 are thin and indicate higher geothermal gradients. A major thermal event of Miocene Age, associated with the intrusion of the Fltzroy Lamproites in the Fitzroy Graben and Lennard Shelf, may be the source of the increased heat flow and also explain an area of high heat flow in some parts of the Graben and shelf.Using the vertical and horizontal distribution of trends of the CAI intervals it is suggested that over large areas of the basin the oil generation window is restricted to an interval about 1100 m thick and, except where migration has taken place, that liquid hydrocarbons will be restricted to the interval between 1600 and 3000 m. In areas affected by the intrusion of the Fitzroy Lamproites, the top of the oil generation window may be as shallow as 800 m.

Dating hypogene iron mineralization events in Archean BIF at Weld Range, Western Australia: insights into the tectonomagmatic history of the northern margin of the Yilgarn Craton

2019 ◽  
Vol 55 (7) ◽  
pp. 1307-1332 ◽  
Author(s):  
Paul Duuring ◽  
João O. S. Santos ◽  
Imogen O. H. Fielding ◽  
Timothy J. Ivanic ◽  
Steffen G. Hagemann ◽  
...  
Keyword(s):  
Western Australia ◽  
Yilgarn Craton ◽  
Northern Margin ◽  
History Of

New heat flow data aids exploration in the Canning Basin, Western Australia

2010 ◽  
Vol 50 (1) ◽  
pp. 411
Author(s):  
Ameed Ghori
Keyword(s):  
Thermal Conductivity ◽  
Heat Flow ◽  
Western Australia ◽  
Conductivity Measurement ◽  
Thermal Conductivity Measurement ◽  
Geothermal Systems ◽  
Flow Data ◽  
Canning Basin ◽  
Sedimentary Deposits ◽  
Subsurface Temperatures

The Geological Survey of Western Australia (GSWA) is providing new heat flow data and continuing studies in subsurface temperatures to understand the origin, migration and accumulation of geofluids in petroleum and geothermal systems of the Canning Basin. The study includes an investigation of subsurface temperatures from 274 wells, thermal conductivity measurement of 50 core samples from 22 wells, and single-dimensional (1D) heat-flow modelling of 101 wells. Thermal conductivity measurement of Canning Basin formations range from 1.06–5.83 W/mºC and modelled surface heat-flow ranges from 20–160 mW/m². The lowest measured thermal conductivity is in the Ordovician Goldwyer Formation at 1.06± 0.28 W/mºC, and the highest values are in the Upper Carboniferous Reeves Formation at 5.83 ± 0.22 W/mºC. Generally, estimated heat-flow values are lower where thick sedimentary deposits are present such as the Fitzroy Trough, Lennard Shelf, and Kidson Sub-basin, with values less than 65 mW/m². The heat flow values increase to over 80 mW/m² on the Broome Platform and Jurgurra, Mowla and Barbwire terraces. Lower heat-flow values have been modelled in West Blackstone–1 (47 mW/m²), Curringa–1 (52 mW/m²), Kennedia–1, Napier–2 and Pearl–1 (55–52 mW/m²). Higher heat-flow values have been modelled in Goodenia–1, Lovells Pocket–1, Kanak–1, Cudalgarra North–1, and Cudalgarra–1, where heat-flow values are over 100 mW/m². These new thermal conductivities, corrected temperatures, and heat-flow values support improved modelling of the Canning Basin petroleum and geothermal systems.

scholarly journals Heat Flow in the Campos Sedimentary Basin and Thermal History of the Continental Margin of Southeast Brazil

2014 ◽  
Vol 2014 ◽  
pp. 1-19 ◽  
Author(s):  
Roberta A. Cardoso ◽  
Valiya M. Hamza
Keyword(s):  
Heat Flow ◽  
Continental Margin ◽  
High Heat ◽  
Geothermal Field ◽  
Peak Oil ◽  
Southeast Brazil ◽  
Campos Basin ◽  
Oil Generation ◽  
High Gradients ◽  
History Of

Bottom-hole temperatures and physical properties derived from geophysical logs of deep oil wells have been employed in assessment of the geothermal field of the Campos basin, situated in the continental margin of southeast Brazil. The results indicate geothermal gradients in the range of 24 to 41°C/km and crustal heat flow in the range of 30 to 100 mW/m2 within the study area. Maps of the regional distributions of these parameters point to arc-shaped northeast-southwest trending belts of relatively high gradients and heat flow in the central part of the Campos basin. This anomalous geothermal belt is coincident with the areas of occurrences of oil deposits. The present study also reports progress obtained in reconstructing the subsidence history of sedimentary strata at six localities within the Campos basin. The results point to episodes of crustal extension with magnitudes of 1.3 to 2, while extensions of subcrustal layers are in the range of 2 to 3. Thermal models indicate high heat flow during the initial stages of basin evolution. Maturation indices point to depths of oil generation greater than 3 km. The age of peak oil generation, allowing for variable time scales for cooling of the extended lithosphere, is found to be less than 40 Ma.

THE GEOLOGY OF THE OFFSHORE CANNING BASIN, WESTERN AUSTRALIA

1970 ◽  
Vol 10 (1) ◽  
pp. 78 ◽  
Author(s):  
A. Challinor
Keyword(s):  
Western Australia ◽  
Close Association ◽  
Structural Features ◽  
Geophysical Data ◽  
Petroleum Exploration ◽  
Canning Basin ◽  
Hydrocarbon Reservoir ◽  
Geophysical Surveys ◽  
Australian Continent ◽  
Carnarvon Basin

The Canning Basin is a major geological province of Western Australia and of the Australian continent. It constitutes a major crustal down-warp between the Precambrian Kimberley and Pilbara Blocks and extends offshore onto the wide Rowley Shelf. A large part of this shelf is held under petroleum exploration permit by a group of companies of which B.O.C. of Australia Limited is operator.To date no wells have been drilled in this offshore Canning Basin but extensive geophysical surveys have allowed an interpretive geological model to be presented. This model is based upon an interpretation of geophysical data by extrapolation from offshore data and well control in the Carnarvon Basin and onshore well, outcrop and geophysical data in the Canning Basin.The major Palaeozoic structural features of the Broome Swell and Fitzroy Graben which characterise the onshore Canning Basin extend offshore beneath Mesozoic and Tertiary cover. Thick Palaeozoic and Permo-Triassic sediments are thus expected offshore in the Fitzroy Graben extension and in a major sub-basin at the offshore margin of the Pilbara Block called the Bedout Sub-basin. This sub-basin is believed to have had continued development during the Mesozoic with the accumulation of large thicknesses of Jurassic-Cretaceous sediments. It is restricted further offshore by the structurally positive Rankin Platform, a feature reflected in a large positive gravity anomaly.Mesozoic deposition was associated with a westerly tilt of the Rowley Shelf and Mesozoic thickness consequently increases westwards. The tilt increased during the Tertiary with the development of a major Tertiary stratigraphic wedge locally reaching 8000-10,000 feet in thickness at the shelf edge.Sedimentary deposition was controlled throughout Phanerozoic time by periodic epeirogenic warping related to uplift of the two major blocks. These movements caused considerable structural fragmentation and initiated periods of exiensive erosion. Complex lithofacies variations are thus expected and multiple intra-sectional unconformities are evident.The area contains many fault induced fold features, some compressional folds and extensive stratigraphic trap potential. Coarse clastic units with high hydrocarbon reservoir potential are expected to occur in close association with postulated marine Mesozoic basinal shale sequences. Similar deposits in the Carnarvon Basin and its offshore extension have been proved to be hydrocarbon bearing and productive (Barrow Island). The hydrocarbon potential of the offshore Canning Basin is thus rated highly.

scholarly journals Burial and Thermal History Modeling of the Paleozoic–Mesozoic Basement in the Northern Margin of the Western Outer Carpathians (Case Study from Pilzno-40 Well, Southern Poland)

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 733
Author(s):  
Dariusz Botor
Keyword(s):  
Heat Flow ◽  
Thermal History ◽  
Middle Jurassic ◽  
Source Rocks ◽  
Petroleum Exploration ◽  
Late Triassic ◽  
Hydrocarbon Generation ◽  
Thermal Maturity ◽  
Northern Margin ◽  
Outer Carpathians

Hydrocarbon exploration under thrust belts is a challenging frontier globally. In this work, 1-D thermal maturity modeling of the Paleozoic–Mesozoic basement in the northern margin of the Western Outer Carpathians was carried out to better explain the thermal history of source rocks that influenced hydrocarbon generation. The combination of Variscan burial and post-Variscan heating due to elevated heat flow may have caused significant heating in the Paleozoic basement in the pre-Middle Jurassic period. However, the most likely combined effect of Permian-Triassic burial and Late Triassic–Early Jurassic increase of heat flow caused the reaching of maximum paleotemperature. The main phase of hydrocarbon generation in Paleozoic source rocks developed in pre-Middle Jurassic times. Therefore, generated hydrocarbons from Ordovician and Silurian source rocks were lost before reservoirs and traps were formed in the Late Mesozoic. The Miocene thermal overprint due to the Carpathian overthrust probably did not significantly change the thermal maturity of organic matter in the Paleozoic–Mesozoic strata. Thus, it can be concluded that petroleum accumulations in the Late Jurassic and Cenomanian reservoirs of the foreland were charged later, mainly by source rocks occurring within the thrustbelt, i.e., Oligocene Menilite Shales. Finally, this work shows that comprehensive mineralogical and geochemical studies are an indispensable prerequisite of any petroleum system modelling because their results could influence petroleum exploration of new oil and gas fields.

THE DEVONIAN GREAT BARRIER REEF OF THE CANNING BASIN, WESTERN AUSTRALIA

1979 ◽  
Vol 19 (1) ◽  
pp. 18
Author(s):  
Phillip E. Playford
Keyword(s):  
Great Barrier Reef ◽  
Western Australia ◽  
Debris Flows ◽  
The Other ◽  
Late Devonian ◽  
Barrier Reef ◽  
Northern Margin ◽  
Canning Basin ◽  
Platform Margin ◽  
Slope Deposits

A remarkable example of an exhumed Middle to Late Devonian barrier-reef belt extends for about 350 km along the northern margin of the Canning basin in Western Australia. The reefs form a series of rugged limestone ranges cut by deep river gorges which provide spectacular sections through the reefs and associated facies. The gross morphology of the ranges and intervening valleys closely resembles that of the Devonian seafloor, so that from the air the reefs are displayed much as they were in Devonian time.The Canning basin reef complexes offer exceptional opportunities for carbonate research because of the excellence of exposures and the wide variety of facies represented; moreover the rocks are little deformed, are not dolomitized extensively and are unmetamorphosed. Some facies have undergone significant compaction through stylolitization; however, most structures and textures in the limestones can be shown to have had depositional or early diagenetic origins.The reef complexes developed as reef-fringed limestone platforms flanked by marginal-slope and basin deposits. They were built by stromatoporoids, algae, and corals in the Givetian and Frasnian and by algae in the Famennian. The platform and basin facies were laid down nearly horizontally, whereas the marginal-slope facies accumulated with steep depositional dips away from the platform. Marginal slopes commonly were as high as 35° in loose talus and were up to vertical where algal binding occurred in association with early lithification. Geopetal fabrics quantify depositional and tectonic/compactional components of observed dips for paleobathymetric studies of the complexes and their fossil biotas.Four main types of platform margin are present: retreating, back-stepping, upright and advancing. The advancing type is characteristic of the Famennian platforms, whereas the other three are typical of the Frasnian. Pinnacle reefs developed during periods of rapid subsidence, especially during the middle Frasnian, are associated with back-stepping and retreating platform margins.Very early submarine cementation was widespread around the platform margins and on parts of the marginal slopes, but it was not generally extensive in the platform interiors. Early fracturing of reef limestones along the platform margins, probably associated with earthquakes, resulted in the development of neptunian dikes and the collapse of some sections of the reef as submarine rockfalls. These often initiated massive debris flows, many of which carved channels in and, somewhat deformed, the underlying marginal-slope deposits.

THE GEOLOGICAL AND STRUCTURAL FRAMEWORK OF THE OFFSHORE KIMBERLEY BLOCK (BROWSE BASIN) AREA, WESTERN AUSTRALIA

1971 ◽  
Vol 11 (1) ◽  
pp. 64 ◽  
Author(s):  
J. W. Halse ◽  
J. D. Hayes
Keyword(s):  
Western Australia ◽  
Sedimentary Basin ◽  
Petroleum Exploration ◽  
The South ◽  
Canning Basin ◽  
The North ◽  
Structural Framework ◽  
Block Area ◽  
Basin Area

The Offshore Kimberley Block area is mainly held under petroleum exploration permit by a group of companies of which B.O.C. of Australia Ltd. is operator. Exploration activities of the Group have shown the area to be a distinctive and separate major sedimentary basin, which it is proposed to term the Browse Basin. The basin is separated from the Bonaparte Gulf Basin in the north by the Londonderry Arch, and from the Offshore Canning Basin to the south by the Leveque Platform. It covers an area of over 60,000 square miles.

Mission Tracks in the Bush

2019 ◽  
Vol 3 (1-2) ◽  
pp. 103-124
Author(s):  
Gemma Tulud Cruz
Keyword(s):  
Nineteenth Century ◽  
Western Australia ◽  
South Australia ◽  
Nation Building ◽  
Cultural Encounters ◽  
History Of

Christian missionaries played an important role in the Australian nation building that started in the nineteenth century. This essay explores the multifaceted and complex cultural encounters in the context of two aboriginal missions in Australia in the nineteenth century. More specifically, the essay explores the New Norcia mission in Western Australia in 1846-1900 and the Lutheran mission in South Australia in 1838-1853. The essay begins with an overview of the history of the two missions followed by a discussion of the key faces of the cultural encounters that occurred in the course of the missions. This is followed by theological reflections on the encounters in dialogue with contemporary theology, particularly the works of Robert Schreiter.

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