Sequence stratigraphy and lateral variability of Lower Cretaceous clinoforms in the southwestern Barents Sea

Marín, Dora; Escalona, Alejandro; Śliwińska, Kasia K.; Nøhr‐Hansen, Henrik; Mordasova, Alina V.

doi:10.1306/10241616010

Cited by 37 publications

(135 citation statements)

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“…chaotic, continuous reflectors), amplitude and continuity of the reflectors. Some of the seismic lines with clinoforms are converted to depth and decompacted (for details, see Marín et al ., ) in order to get the original depositional approximate geometry (Deibert et al ., ; Salazar et al ., ). The sedimentological interpretation of the seismic facies is constrained by cores and GR logs.…”

Section: Methodsmentioning

confidence: 97%

“…S0–S2) is improved (cf. Marín et al ., ). Furthermore, a biostratigraphical framework for the four youngest sequences (i.e.…”

Section: Methodsmentioning

confidence: 98%

“…Due to the lateral variability of the facies, uncertainties in the correlation of formations and the limited age control in the Lower Cretaceous succession, a sequence stratigraphic framework of seven genetic sequences (S0‐S6) bound by flooding surfaces ( sensu Galloway, ) is used in this study for well and seismic correlations (Fig. ) (Marín et al ., ). The sequences are defined using stacking patterns in the Gamma Ray (GR) logs and lap terminations on seismic data, and their boundaries are marked by downlaps and high GR values (Fig.…”

Section: Geological Settingmentioning

confidence: 97%

“…a). The sequences represent a time span of 5–10 million years and can be correlated through all the basin and in areas such as the eastern Barents Sea and partially with Svalbard (Grundvåg et al ., and Marín et al ., ). They are also partially comparable with the North Atlantic cycles described by Jacquin et al .…”

Section: Geological Settingmentioning

confidence: 97%

“…The main aims of this study are as follows: 1) to use tectonostratigraphy and characterization of seismic facies to understand the factors controlling the rift climax to post‐rift basin fill. Particularly to investigate how rifting in adjacent basins may control the evolution of the post‐rift succession; 2) to describe and interpret the stratigraphic architecture of the Lower Cretaceous succession of the Hammerfest Basin and variability in depositional environments with respect to the recognized stages of rifting; and 3) to improve the age control of the seismic facies and correlate them within a basin wide stratigraphic framework (Marín et al ., ). This is achieved by combining two‐ and three‐dimensional seismic data with wire line logs, core data and dinoflagellate cyst (dinocyst) biostratigraphy.…”

Section: Introductionmentioning

confidence: 96%

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Unravelling key controls on the rift climax to post‐rift fill of marine rift basins: insights from 3D seismic analysis of the Lower Cretaceous of the Hammerfest Basin, SW Barents Sea

et al. 2017

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In this study, we investigate key factors controlling the rift climax to post‐rift marine basin fill. We use two‐ and three‐dimensional seismic data in combination with sedimentological core descriptions from the Hammerfest Basin, south‐western Barents Sea to characterize and analyse the tectonostratigraphy and seismic facies of the Lower Cretaceous succession. Based on our biostratigraphic analyses, the investigated seismic facies are correlated to 5–10 million year duration sequences that make up the stratigraphic framework of the basin fill. The seismic facies suggest the basin fill was deposited in shallow to deep‐marine conditions. During rift climax in Volgian/Berriasian to Barremian times, a fully linked fault array controlled the formation of slope systems consisting of gravity flow deposits along the southern margin of the basin. Renewed uplift of the Loppa High north of the basin provided coarse‐grained sediments for fan deltas and shorelines that developed along the northern basin margin. During the early to middle late Aptian, the input of coarse‐grained sediments occurred mainly in the NW and SW corners of the basin, reflecting renewed uplift‐induced topography in the western flank of the Loppa High and along the western Finnmark Platform. The lower Albian part of the basin fill is interpreted as a post‐rift succession, where the remnant topography associated with the Finnmark Platform continued to provide sediments to prograding fan deltas and adjacent shorelines. During the Albian, a series of faults were reactivated in the northern part of the basin, and footwall wedges comprising various gravity flow deposits occur along these faults. During the latest Albian to Cenomanian, the south‐eastern part of the Loppa High was flooded by a rise in eustatic sea‐level and differential subsidence. However, the western part of the high remained exposed and acted as a sediment source for a shelf‐margin system prograding towards the SE. It is concluded that the rift climax succession is controlled by: along strike variability of throw and steps of the main bounding faults; the diachronous movement of the faults; and the nature of the feeder system. The evolution of the post‐rift succession may be controlled by rifting in adjacent basins which preferentially renew sources of sediments; local reactivation of faults; and local remnant topography of the basin flanks. We suggest that existing tectonostratigraphic models for rift basins should be updated, to incorporate a more regional perspective and integrating variables such as the influence of adjacent rift systems.

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Section: Methodsmentioning

confidence: 97%

“…S0–S2) is improved (cf. Marín et al ., ). Furthermore, a biostratigraphical framework for the four youngest sequences (i.e.…”

Section: Methodsmentioning

confidence: 98%

Section: Geological Settingmentioning

confidence: 97%

Section: Geological Settingmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 96%