Geology of the Amoco Imp Skelly A-1 Osprey H-84 well, Grand Banks, Newfoundland

Jansa, L F; Gradstein, Felix M.; Williams, G L; Jenkins, W. A. M.

doi:10.4095/102644

Cited by 9 publications

(5 citation statements)

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“…The older sequence of red beds and salt (Osprey Evaporites) occur in various basins on the Grand Banks (e.g. Carson and Jeanne d'Arc basins; Jansa et al 1977Jansa et al , 1980, and are of Carnian-Norian age. Younger red beds and salts of Norian to Early Jurassic age (Eurydice Formation and Argo Salt) occur in basins both on the Scotian Shelf and on the Grand Banks (Holser et al 1988).…”

Section: Tectonostratigraphic Sequencesmentioning

confidence: 99%

Stratigraphic Record of the Early Mesozoic Breakup of Pangea in the Laurasia-Gondwana Rift System

Olsen

1997

Annu. Rev. Earth Planet. Sci.

298

226

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Rift basins of the Central Atlantic Margins (CAM) of North America and Morocco preserve largely continental sequences of sedimentary strata and less important minor basalt flows spanning much of the early Mesozoic. The best known is the Newark basin of New Jersey, New York, and Pennsylvania where an astronomically calibrated magnetic polarity time scale is developed. Lacustrine cycles of Milankovitch origin are commonly present in CAM basins, with the period changing from 10 ky (paleoequator with coals), to 20 ky (4 •-10 • N), to perhaps 40 ky northward with evaporites. Cycles of ∼100 ky, 413 ky, and ∼2 my are also important. Four mostly unconformity-bounded tectonostratigraphic sequences are present. The Anisian TS I is fluvial and eolian. TS II-TS IV (Late Triassic to Early Jurassic) consist of "tripartite" lacustrine sequences caused by extension pulses. The Newark basin accumulation rate history allows comparison with quantitative rift basin models. The North American plate's slow northward drift resulted in a relative shift of climate, although the rapid humidification during the latest Triassic and Early Jurassic is associated with a sea-level rise. The Triassic-Jurassic mass extinction is of independent origin, plausibly impact related.

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Section: Tectonostratigraphic Sequencesmentioning

confidence: 99%

Stratigraphic Record of the Early Mesozoic Breakup of Pangea in the Laurasia-Gondwana Rift System

Olsen

1997

Annu. Rev. Earth Planet. Sci.

298

226

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“…period which has been considered [8] to be the rifting time for which the instantaneous model can be applied. For example, Jansa et al [10,11] have identified Carnian-Norian (212-200 m.y.B.P.) red beds and evaporites in wells along the Atlantic margin of Canada, where sedimentological [12] and magnetic [13] where rifting began 20-26 m.y.B.P, near the Oligocene-Miocene boundary [14] while organized seafloor spreading began in the southern Red Sea only 4-5 m.y.B.P.…”

Section: Introductionmentioning

confidence: 99%

Effects of finite rifting times on the development of sedimentary basins

Cochran

1983

Earth and Planetary Science Letters

205

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Most thermo-mechanical models for the development of sedimentary basins have assumed that the rifting responsible for the formation of the basin occurred instantaneously and have examined the post-rift development of the basin. This assumption greatly simplifies the mathematical treatment, but is not in accord with what is found in nature, where 10to 50-m.y. rifting events commonly accompany the formation of sedimentary basins and continental margins. The effects of a finite rifting time on the development of sedimentary basins are examined using an analytic technique which allows an arbitrary rifting history in both time and space and which considers the effects of both vertical and horizontal heat transfer. This technique allows the thermal structure of the lithosphere to be calculated throughout the rifting event and thus permits the subsidence history and surface heat flow of the developing basin to be traced.The effect of a finite-duration extension event is that heat is lost during rifting increasing the syn-rift subsidence at the expense of the post-rift. Lateral heat flow, which was not included in previous studies of the effect of finite rifting times, has a significant effect on the subsidence history, distribution of sediments and thermal history. In particular, the post-rift subsidence is decreased by more than 25% for a 20-m.y. rifting event and by more than 10-15% for a rifting event as short as 10 m.y. This will significantly decrease the subsidence rates in the post-rift stage and implies that inferences concerning the structure, development and thermal history of the basin derived from using "fl-curves" to interpret backstripped subsidence can be greatly in error.Variations in syn-rift sediment accumulation and lithospheric thermal structure at the end of rifting resulting from different rifting histories can interact with other factors, such as the flexural response of the lithosphere to sediment loading, to affect the final width of the basin, the total amount of sediments that accumulate and the basin stratigraphy.Lamont-Doherty Geological Observatory Contribution No. 3518.

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“…Most of those microfossil studies focus on the Scotian Basin offshore Nova Scotia, 800 km to the SW, or the Jeanne d'Arc Basin. The few papers dealing specifically with the Carson Basin are by Jansa et al (1977Jansa et al ( , 1980a Based on organic petrology and palynology, Swift and Williams (1980) suggested that "the upper Mic Mac Formation contains potential source rock material in the Rankin M-36 well in the Jeanne d'Arc Basin". McAlpine (1990b; his figure 14) formally named this interval the Egret Member of the Rankin Formation.…”

Section: Methodsmentioning

confidence: 99%

“…Knowledge of the stratigraphic ranges and palaeo-environmental preferences of dinocysts has made major advances in the last two decades, so a re-appraisal of the biostratigraphy was timely. In this study, the authors applied data from European surface sections (Woollam and Riding, 1983;Costa and Davey, 1992;Powell, 1992;Riding and Thomas, 1992;Williams et al, 1999Williams et al, , 2001Williams et al, , 2004, and wells and shallow core holes on the Grand Banks (Williams, 1975;Williams and Brideaux, 1975;Jansa et al, 1977Jansa et al, , 1980aBarss et al, 1979;Bujak-Davies, 1987;Williams et al, 1990;Williams, 2003a, b, c, d;2006 a, b, c, d) for age control. Brinkhuis (1992), Stover et al (1996), and Jaramillo and Oboh-Ikuenobe (1999) provided valuable control for palaeo-environmental interpretations.…”

Section: Biostratigraphy and Palaeo-environments Biostratigraphymentioning

confidence: 99%

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Is There a Viable Petroleum System in the Carson and Salar Basins, Offshore Newfoundland?

Wielens

Jauer

Williams

2006

Journal of Petroleum Geology

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The Carson Basin on the eastern Grand Banks of Newfoundland has been penetrated by four wells ‐ Bonnition H‐32, Osprey H‐84, Skua E‐41 and St. George J‐55 ‐ which were drilled along its western margin. The adjacent deeper‐water Salar Basin to the east remains undrilled with the exception of ODP holes 1276A and 1277. The Carson Basin wells contain a thick Mesozoic and Cenozoic sedimentary section which includes reservoirs and seals; but source rocks, such as those present in the adjacent Jeanne d'Arc Basin, have not been found. To assess the petroleum system, well samples were collected to provide Rock Eval and vitrinite reflectance data, and analysed biostratigraphically to obtain ages and depositional environments. These analyses indicate that a Late Jurassic source rock, similar to the Egret Member (of the Rankin Formation) of the Jeanne d'Arc Basin, may be present in the deeper‐water, distal parts of the Carson and Salar Basins; this is based on a regional palaeotectonic reconstruction, together with gravity and magnetic data, including sea‐floor spreading magnetic anomalies. We interpret the absence of the Egret Member in the four wells to reflect the wells' locations rather than the Member's absence from the two basins. An integrated 4D model of the Carson Basin was built from biostratigraphy and seismic surfaces, to which an Egret‐like source rock was added. The modelling showed that significant volumes of hydrocarbons could have been generated, mostly during the main Late Cretaceous drifting event in the area. Hence, significant volumes of hydrocarbons could be present in the Carson and Salar Basins, mainly in stratigraphic traps in Early Cretaceous clastic reservoirs.

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Geology of the Amoco Imp Skelly A-1 Osprey H-84 well, Grand Banks, Newfoundland

Cited by 9 publications

References 0 publications

Stratigraphic Record of the Early Mesozoic Breakup of Pangea in the Laurasia-Gondwana Rift System

Stratigraphic Record of the Early Mesozoic Breakup of Pangea in the Laurasia-Gondwana Rift System

Effects of finite rifting times on the development of sedimentary basins

Is There a Viable Petroleum System in the Carson and Salar Basins, Offshore Newfoundland?

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