A multidisciplinary study of diagenesis and pore fluid evolution in frontier basins; an example from Canterbury and Great South basins, New Zealand

Higgs, Karen E.; Funnell, R.; Browne, Greg H.

doi:10.1016/j.marpetgeo.2020.104817

Cited by 2 publications

(2 citation statements)

References 57 publications

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“…Given our study area was situated in a deep‐water regime since ca. 75 Ma (Higgs et al, 2021; Killops et al, 1997; Osli et al, 2018; Shalaby et al, 2019), and the scale of the mounded structures mapped, we consider it unlikely that the mounded structures represent carbonate build‐ups.…”

Section: Discussionmentioning

confidence: 99%

Reutilization of fluid flow pathways over 54 million years, offshore New Zealand

2023

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Structures that facilitate fluid migration are common in sedimentary basins. We document several possible hydrothermal and/or volcanic vents located above a >157 km2, late Cretaceous volcanic field in the Great South Basin, offshore New Zealand. Three of the four vents are vertically stacked, suggesting episodic re‐use of the same fluid pathway between ca. 75 and 56 Ma. A palaeo‐pockmark dated to ca. 49 Ma and free gas occurring within strata ca. 21 Myr old are located directly above these stacked vents. The spatial association of the vents, pockmark and free gas further suggests re‐use of the fluid migration pathway(s) extended for over 54 Myr. Our results imply that reutilization of fluid flow pathways can affect the distribution of fluids within basins over prolonged periods, potentially impacting hydrocarbon/geothermal exploration and geohazard assessment.

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Section: Discussionmentioning

confidence: 99%

Reutilization of fluid flow pathways over 54 million years, offshore New Zealand

2023

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“…Eight wells have been drilled in the offshore GSB, and these along with six wells in the contiguous CB to the north, provide information on lithology and biostratigraphy (Blanke, 2015;Higgs et al, 2019Higgs et al, , 2021Hunt International Petroleum, 1977a, 1977b, 1977c, 1978a, 1978b, 1978cPlacid Oil, 1984a, 1984bSchiøler & Raine, 2009;Schiøler et al, 2011Schiøler et al, , 2017. Whilst situated almost entirely offshore, a small part of GSB extends onshore, where limited strata of mid-Cretaceous to Eocene age crop out in southeast Otago.…”

Section: Methodsmentioning

confidence: 99%

Evolution of syn‐ to early post‐rift facies in rift basins: insights from the Cretaceous–Paleocene of the Great South Basin, New Zealand

et al. 2022

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Evolution of rift basin fill and geometry depend on the complex interactions between fault growth, sediment supply, base level changes and pre‐existing basement fabric. This study integrates multiple datasets in the Great South Basin (GSB), southeast New Zealand, and provides key insights into the evolution of depositional environments in rift basins, including the interplay between normal faulting, sediment supply and sediment dispersal patterns. It also examines the control of pre‐existing basement fabric on rift geometry and sediment distribution in the syn‐ and post rift successions. The syn‐rift is up to ~5.5 km thick in the GSB, and is underlain by several different basement terranes. Three syn‐rift stages are recognised; c.105–101, 101–90 and 90–83 Ma. During the initial syn‐rift, isolated northeast‐trending graben developed, with resultant alluvial fan/fan delta, fluvial, coastal and lacustrine sediment fill. The balance between sediment supply and accommodation space exerted considerable control on facies, especially the presence of lacustrine facies. During the later stages of syn‐rift, marine transgression occurred and connectivity between the graben developed, with shelfal, shoreface and marginal‐marine facies deposited. With marine transgression across the hinterland, sediment supply was significantly reduced in the northeast of the basin, leading to underfilling of graben, and preservation of rift topography for up to ~20 Myr after the cessation of faulting. In the west, where sediment supply was higher, rift topography was quickly filled. The NW‐trending basement terrane boundaries controlled accommodation space development during the initial stages of graben formation. Later in the syn‐ and post rift stages, these terrane boundaries formed long‐lived sediment input points into the basin, and controlled the position of repeated large deltaic depositional units.

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A multidisciplinary study of diagenesis and pore fluid evolution in frontier basins; an example from Canterbury and Great South basins, New Zealand

Cited by 2 publications

References 57 publications

Reutilization of fluid flow pathways over 54 million years, offshore New Zealand

Reutilization of fluid flow pathways over 54 million years, offshore New Zealand

Evolution of syn‐ to early post‐rift facies in rift basins: insights from the Cretaceous–Paleocene of the Great South Basin, New Zealand

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