Petroleum potential and oil‐source correlation in the Great South and Canterbury Basins

Killops, S. D.; Cook, Richard A.; Sykes, Richard; Boudou, Jean-Paul

doi:10.1080/00288306.1997.9514773

Cited by 40 publications

(85 citation statements)

References 14 publications

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“…As usual for such organic matter, C29 components dominate the steranes, wax-derived long-chain components dominate the «-alkanes (abundance peaking at C29), and both pristane/phytane and hopane/ sterane ratios are high (Table 3). The higher plant biomarker distributions are consistent with the palynologically inferred Raukumara flora, and are similar to those previously observed in bitumens from South Island coals of similar age (e.g., Clarence Valley and Shag Point; Killops et al 1997). Bitumens from all these samples contain abundant gymnosperm-derived diterpanes, among which phyllocladanes are generally important members (m/z 123 mass chromatogram, Fig.…”

Section: Organic Geochemistrysupporting

confidence: 69%

Cretaceous carbonaceous rocks from the Norfolk Ridge system, Southwest Pacific: Implications for regional petroleum potential

Herzer

Sykes

Killops

et al. 1999

New Zealand Journal of Geology and Geophysics

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Late Cretaceous carbonaceous rocks have been dredged from two sites on the Norfolk Ridge system northwest of New Zealand. On the West Norfolk Ridge, Raukumara Series (late Cenomanian to late Coniacian, 95-86.5 Ma) coal measure sandstones and mudstones contain dispersed, immature (R O 0.37%), terrestrial (type III) organic matter and have poor petroleum generative potential (TOC 2.2-2.8%, S2 1.2-1.6 mg HC/g rock). However, the in situ coal measure sequence may contain abundant coal seams with excellent generative potential, and thus constitutes a potential source rock formation for the adjacent New Caledonia and Reinga Basins that have thick sections of sediments. The coal measures probably formed in a coastal plain environment subjected to episodic marine incursions. At the second dredge site, near the junction of the Norfolk and Reinga Ridges, a late Piripauan to early Haumurian (Santonian-Campanian, 85-75 Ma) marine shale contains sparse, mixed marine and terrestrial (type II/III) organic matter. Hopane and sterane parameters imply a maturity equivalent to at least 0.6% R o , but the analysed shale has poor generative potential (TOC 0.9%, S2 1.4 mg HC/g rock).Biomarkers suggest that the terrestrial contribution to bitumen in the shale is minor compared with the marine, but kinetic parameters are more consistent with a type III G97050

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Section: Organic Geochemistrysupporting

confidence: 69%

Cretaceous carbonaceous rocks from the Norfolk Ridge system, Southwest Pacific: Implications for regional petroleum potential

Herzer

Sykes

Killops

et al. 1999

New Zealand Journal of Geology and Geophysics

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“…Figure 2: Tectono-stratigraphic framework of the Canterbury Basin highlighting ages of onshore magmatic events and phases of petroleum system development [after Carter 1988;Fulthorpe et al 1996;Killops et al 1997;Bennett et al 2000;Timm et al 2010;Uruski 2010]. Magmatic events correspond to: A = Geraldine and Timaru Lavas; B = Banks Peninsula; C = Cookson Volcanics; and D = View Hill, Central Canterbury [Timm et al 2010].…”

Section: Dataset and Methodologymentioning

confidence: 99%

“…Graben and half-graben formed during the middle Cretaceous phase of rifting broadly strike E-W and were infilled by fluvial and paralic sediments, including coal that forms the main source rock in the region Figure 2) [i.e. the Horse Range and Katiki formations; Carter 1988; Killops et al 1997;Uruski 2010;Ghisetti and Sibson 2012]. The onset of passive subsidence and a marine transgression in the Late Cretaceous defined the transition to the post-rift period, characterised stratigraphically by the upwards progression from terrestrial sandstone and coal (i.e.…”

Section: Geological Settingmentioning

confidence: 99%

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Unravelling intrusion-induced forced fold kinematics and ground deformation using 3D seismic reflection data

2018

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Sills emplaced at shallow-levels are commonly accommodated by overburden uplift, producing forced folds. We examine ancient forced folds developed above saucer-shaped sills using 3D seismic reflection data from the Canterbury Basin, offshore SE New Zealand. Seismic-stratigraphic relationships indicate sill emplacement occurred incrementally over~31 Myr between the Oligocene (~35-32 Ma) and Early Pliocene (~5-4 Ma). Two folds display flat-topped geometries and amplitudes that decrease upwards, conforming to expected models of forced fold growth. Conversely, two folds display amplitudes that locally increase upwards, coincident with a transition from flat-topped to dome-shaped morphologies and an across-fold thickening of strata. We suggest these discrepancies between observed and expected forced fold geometry reflect uplift and subsidence cycles driven by sill inflation and deflation. Unravelling these forced fold kinematic histories shows complex intrusion geometries can produce relatively simple ground deformation patterns, where magma transgression corresponds to localisation of uplift.

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“…2) 30 (i.e. the Horse Range and Katiki formations ;Carter, 1988;Killops et al, 1997;Uruski, 2010;Ghisetti and Sibson, 2012). The onset of passive subsidence and a marine transgression in the Late Cretaceous defined the transition to the post-rift period, characterised stratigraphically by the upwards progression from terrestrial sandstone and coal (i.e.…”

Section: Geological Settingmentioning

confidence: 99%

Unravelling intrusion-induced forced fold kinematics and ground deformation using 3D seismic reflection data

Reeves¹,

Magee²,

Jackson³

2017

Preprint

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Sills emplaced at shallow-levels are commonly accommodated by overburden uplift, producing forced folds. We examine ancient forced folds developed above saucer-shaped sills using 3D seismic reflection data from the Canterbury Basin, offshore SE New Zealand. Seismic-stratigraphic relationships indicate sill emplacement occurred incrementally over ~31 Myr between the Oligocene (~35-32 Ma) and Early Pliocene (~5-4 Ma). Two folds display flat-topped geometries and amplitudes that 10 decrease upwards, conforming to expected models of forced fold growth. Conversely, two folds display amplitudes that locally increase upwards, coincident with a transition from flat-topped to dome-shaped morphologies and an across-fold thickening of strata. We suggest these discrepancies between observed and expected forced fold geometry reflect uplift and subsidence cycles driven by sill inflation and deflation. Unravelling these forced fold kinematic histories shows complex intrusion geometries can produce relatively simple ground deformation patterns, where magma transgression corresponds to localisation 15 of uplift.

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Petroleum potential and oil‐source correlation in the Great South and Canterbury Basins

Abstract: Pyrolytic analyses suggest that Cretaceous coaly

Cited by 40 publications

References 14 publications

Cretaceous carbonaceous rocks from the Norfolk Ridge system, Southwest Pacific: Implications for regional petroleum potential

Cretaceous carbonaceous rocks from the Norfolk Ridge system, Southwest Pacific: Implications for regional petroleum potential

Unravelling intrusion-induced forced fold kinematics and ground deformation using 3D seismic reflection data

Unravelling intrusion-induced forced fold kinematics and ground deformation using 3D seismic reflection data

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