THE COOPER'S CREEK BASIN

1966 ◽  
Vol 6 (1) ◽  
pp. 71 ◽  
Author(s):  
Adrian Kapel
Keyword(s):  
Sedimentary Basin ◽  
The South ◽  
The North ◽  
Geophysical Surveys ◽  
Lower Palaeozoic ◽  
Basement Ridge

Results of past surface and subsurface geological and geophysical surveys indicate that the Cooper's Creek area has been a sedimentary basin from Lower Palaeozoic time to at least the beginning of Cretaceous time.The Cooper's Creek Basin is bounded to the east by the Canaway Ridge, to the south by a basement ridge that runs from Naryilco to Kopperamanna, to the north by a folded trend that runs from Warbreccan to Kopperamanna.Sediments from Cambrian to Recent age have been encountered in wells drilled by Delhi-Santos. It is postulated that the present basin originated in post-Siluro-Devonian time after the Bowning orogeny.Physiographically the axis of the basin is reflected by the Cooper's Creek.

scholarly journals Hydrocarbon source rock sampling in Peary Land 1980

1981 ◽  
Vol 106 ◽  
pp. 99-103
Author(s):  
F Rolle
Keyword(s):  
Sedimentary Basin ◽  
Carbonate Platform ◽  
Early Carboniferous ◽  
Early Cambrian ◽  
The South ◽  
Hydrocarbon Source Rock ◽  
The North ◽  
Lower Palaeozoic ◽  
North Greenland ◽  
Land Region

The Peary Land region in North Greenland (fig. 31) contains a sequence of Lower Palaeozoic sediments which is probably more than 4 km thick (Dawes, 1976; Christie & Peel, 1977; Hurst, 1979; Christie & Ineson, 1979; Hurst & Surlyk, 1980; Ineson & Peel, 1980; Surlyk, Hurst & Bjerreskov, 1980). From Early Cambrian to Wenlock the area was divided into a northern turbidite trough and a southern, mainly carbonate platform (fig. 32). The platform seems to have undergone several phases of backstepping to the south, accompanied by expansion of the turbidite basin (fig. 32) (Surlyk et al., 1980). The region was affected by an orogeny of assumed Devonian - early Carboniferous age (Dawes, 1976). Deformation is most intense in northern Johannes V. Jensen Land (fig. 31), where an amphibolite facies is attained along the north eoast (Dawes & Soper, 1973) and decreases southwards, leaving the platform earbonates virtually undeformed. A separate, strongly block-faulted sedimentary basin, the Wandel Sea Basin is present in eastern Peary Land and farther to the south-east (Dawes & Soper, 1973; Håkansson, 1979). It eontains a sequenee of Upper Palaeozoie carbonates and Upper Palaeozoic - Mesozoic mainly coarse clastics more than 3 km thick.

scholarly journals Notes on some Lower Palaeozoic to Tertiary faunas from eastern North Greenland

1974 ◽  
Vol 65 ◽  
pp. 18-23
Author(s):  
J.S Peel ◽  
P.R Dawes ◽  
J.C Troelsen
Keyword(s):  
Field Work ◽  
The South ◽  
Initial Field ◽  
North East ◽  
The North ◽  
Lower Palaeozoic ◽  
North Greenland

The north-east 'corner' of Greenland is geologically probably the least known region in North Greenland. Various expeditions have visited the coastal parts but geological detail, particularly faunal information, has remained surprisingly scarce. Initial field work by Koch (1923, 1925) and Troelsen (1949a, b, 1950) showed that a Precambrian to Silurian section - unfolded in the south, folded in the north - was unconformably overlain by a Carboniferous to Tertiary section, now referred to as the Wandel Sea basin (Dawes & Soper, 1973).

GEOPHYSICAL EXPLORATION IN TORRES STRAIT

1965 ◽  
Vol 5 (1) ◽  
pp. 188
Author(s):  
E. W. Vind ◽  
C. R. Harwood
Keyword(s):  
Seismic Survey ◽  
Survey Area ◽  
The South ◽  
North East ◽  
The North ◽  
Geophysical Surveys ◽  
Arafura Sea ◽  
Cape York ◽  
Torres Strait ◽  
Marine Seismic

Torres Strait is the narrow waterway on the Continental Shelf which connects the Arafura Sea to the Coral Sea and separates the Cape York Peninsula from South-western Papua. Within Torres Strait and the Arafura Sea the marine seismic survey area specifically discussed here covers the north-western part of Authority to Prospect 104P held by Marathon Petroleum Australia Ltd. Except for a few small islands this area is covered by a shallow tropical sea not more than 160 feet deep which is studded with coral reefs.Four regional structural features influence the area. These are the Cape York-Oriomo Ridge to the east, the Carpentaria Basin to the south and the Morehead and Papuan Basins to the north. These features are indicated by regional geology and have been confirmed by the combined interpretations of reconnaissance geophysical surveys conducted by various exploration organisations during the past 30 years.The A.T.P. 104P (West) Marine Seismic Survey, consisting of 618 miles of subsurface coverage, was carried out for Marathon between November 8 and November 28, 1964.Several operational problems prevented completion of the survey as originally planned. Shallow water and reefing prevented shooting in the north-east portion of the proposed area.Shooting 300 per cent subsurface coverage commenced in the south-eastern part of the survey area, but, due to shallow basement at less than one second, multiple coverage was not feasible. Production shooting which gave 100 per cent subsurface coverage on the short spreads was continued throughout the remainder of the survey.Two reflection horizons and a resultant isochron were mapped in the area. A "deep" reflector is interpreted as originating from granitic basement, while a "shallow" reflector is tentatively correlated with a horizon in the Cretaceous section.The "shallow" horizon mapped is essentially conformable with the "deep" horizon. Both show a regional west dip with thinning of section to the east. Some north and south components of the regional west dip are established. The resultant isochron comparisons based on this work appear too limited in scope to establish any definite local structural control of deposition.

scholarly journals Observations on the Upper Permian of Wegener Halvø, East Greenland

1979 ◽  
Vol 95 ◽  
pp. 90-92
Author(s):  
L Stemmerik
Keyword(s):  
Sedimentary Basin ◽  
Upper Permian ◽  
The South ◽  
East Greenland ◽  
Eastern Side ◽  
The North ◽  
North Greenland

The Upper Permian sediments of East Greenland are exposed from Scoresby Land in the south to Clavering Ø in the north (fig. 30). The deposits on Wegener Halvø appear to be situated on the eastern side of the southern end of an elongated, approximately 80 km wide, sedimentary basin (Birkelund & Perch-Nielsen, 1976). Whether this basin extended northwards to include the Upper Permian deposits of North Greenland, has yet to be established.

THE EYRE SUB-BASIN: RECENT EXPLORATION RESULTS

1981 ◽  
Vol 21 (1) ◽  
pp. 91 ◽  
Author(s):  
J. Bein ◽  
M. L. Taylor
Keyword(s):  
Seismic Data ◽  
Sedimentary Cover ◽  
Sediment Thickness ◽  
The South ◽  
The North ◽  
Fault Block ◽  
Basement Fault ◽  
Basement Ridge ◽  
Sedimentary Fill ◽  
Great Australian Bight

The Eyre Sub-basin of the Great Australian Bight Basin comprises a series of half-grabens with a maximum sediment thickness in the order of 6 000 m. It is bounded to the north by high-standing basement with a sedimentary cover about 550 m thick. To the west, sedimentary cover gradually thins and onlaps rising basement. To the south, a high- standing basement ridge separates the sediments within the Eyre Sub-basin from those of the Great Australian Bight Basin proper. The sedimentary pile apparently thickens south of the basement ridge where water depth increases to more than 1 400 m.The high basement trend bounding the sub-basin to the south plunges gradually to the east where it is eventually broken up by faulting. Seismic data from the eastern end of the sub-basin show progressive down-faulting of basement and increasing sediment thickness to the south.Jerboa 1 was drilled on a tilted basement fault block. It penetrated 1 739 m of sedimentary section, which is believed to be a condensed sequence representative of most of the total sedimentary fill of the sub-basin. Middle to Late Jurassic (Callovian-Kimmeridgian) sediments were encountered above basement, and the sequence continued almost unbroken into the Late Cretaceous (Cenomanian). Minor unconformities occur between the non-marine Aptian sequence and the overlying marine Albian, and between the Albian and Cenomanian. A major unconformity separates the Cenomanian from the overlying Tertiary section, interpreted to have been deposited after the separation of Australia from Antarctica.

The South Mayo Trough: a possible Ordovician Gulf of California-type marginal basin in the west of Ireland

1977 ◽  
Vol 14 (11) ◽  
pp. 2453-2461 ◽  
Author(s):  
Paul D. Ryan ◽  
Jean B. Archer
Keyword(s):  
Gulf Of California ◽  
Sedimentary Basin ◽  
The South ◽  
Source Areas ◽  
Marginal Basin ◽  
The North ◽  
History Of ◽  
Controlled Deposition ◽  
Uplift And Erosion ◽  
North And South

The South Mayo Trough, an early Ordovician sedimentary basin, was developed at the southern margin of the Laurentian plate. It controlled deposition of 12.8 km of sediment. Basic vulcanism accompanied the opening of the trough. This was followed by the deposition of turbidites and finally of fluvio-deltaic sediments. Initial island arc vulcanism was replaced by a bimodal basalt–rhyolite suite during sedimentation. The trough was bounded to the north and south by metamorphic source areas, of which the southerly, the Connemara Cordillera, was the more important. The Connemara Cordillera, comprised of Dalradian continental margin sediments, was deformed and metamorphosed before the trough's formation. Uplift and erosion of Connemara, opening of the trough, and change in vulcanism all occurred during late Tremadoc – early Arenig times. These events are related to the collision of the Iapetus ridge with a trench to the south of Connemara, which initiated a Gulf of California-type marginal basin, the South Mayo Trough. Comparisons between the morphology and sedimentary history of the trough with that of the Gulf of California and the geology of their adjacent source areas support this hypothesis.

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.

scholarly journals Lower Palaeozoic stratigraphy around Danmark Fjord, eastern North Greenland

1981 ◽  
Vol 106 ◽  
pp. 21-27
Author(s):  
J.S Peel ◽  
J.R Ineson ◽  
P.D Lane ◽  
H.A Armstrong
Keyword(s):  
Regional Mapping ◽  
The South ◽  
The North ◽  
Lower Palaeozoic ◽  
Western Side ◽  
North Greenland

Geologieal fieldwork in the Caledonian foreland of eastern North Greenland commenced during 1979 (Peel, 1980) was continued in 1980 with systematic regional mapping on a 1:100000 photomosaie base of western Kronprins Christian Land, from Centrum Sø in the south to Prins Frederik Øer in the north (fig. 6). Mapping was coneentrated on the essentially autochthonous sequence adjacent to Danmark Fjord, with Hurst & McKerrow (this report) investigating the Caledonian Nappe sequenee further to the east (Map i). In addition to activities in Kronprins Christian Land, short visits were also made to Kap Holbæk and Valdemar Glückstadt Land, on the western side af Danmark Fjord.

Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

2000 ◽  
Vol 179 ◽  
pp. 201-204
Author(s):  
Vojtech Rušin ◽  
Milan Minarovjech ◽  
Milan Rybanský
Keyword(s):  
Emission Lines ◽  
High Latitudes ◽  
Green Line ◽  
Solar Cycles ◽  
The South ◽  
Coronal Emission ◽  
Local Maxima ◽  
The North ◽  
Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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