Structure and evolution of the Atlantic passive margins: A review of existing rifting models from wide-angle seismic data and kinematic reconstruction

Biari, Y.; Klingelhoëfer, Frauke; Franke, Dieter; Funck, Thomas; Loncke, Lies; Sibuet, Jean‐Claude; Basile, Christophe; Austin, James A.; Rigoti, Caesar Augusto; Sahabi, Mohamed; Benabdellouahed, Massinissa; Roest, W. R.

doi:10.1016/j.marpetgeo.2021.104898

Cited by 21 publications

(13 citation statements)

References 351 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the Nova Scotia-north Morocco segment, the estimated amount of stretching is similar to its conjugate counterpart (Biari et al, 2021), thinning a 35-38 km-thick crust in along a 150-200 km distance. Southward, the North American and south Morocco segment are showing the volcanic/nonvolcanic contrast between conjugate margins.…”

Section: Alongshore Crustal Structure Of the Passive Margin Segmentsmentioning

confidence: 73%

“…Results of wide-angle seismic data along the northern CAO passive margins have been presented in Biari et al (2021), and geophysical surveys are relatively well-distributed along the two conjugate passive margins of the CAO, with the exception of the southern eastern margin, from Mauritania to Senegal, where we lack such results. A cartographic summary is given in figure 4, picturing the main differences between both conjugate margins.…”

Section: Alongshore Crustal Structure Of the Passive Margin Segmentsmentioning

confidence: 78%

“…Strictly speaking, in the present-day configuration (Fig. 2), the CAO represents the oceanic domain located between the Gibraltar-Azores-New Foundland (Gloria) fault zone in the north and the Guinea/Fifteen-Twenty fault zone in the south (e.g., Biari et al, 2021).…”

Section: Central Atlantic Geological Historymentioning

confidence: 99%

“…The comparison between the DAKHLA (Klingelhoefer et al, 2009;Biari et al, 2017) and the LASE profiles on the US side (LASE Study Group, 1986) shows i) an amount of stretching similar on both sides of the CAO, ii) a significant difference in crustal thickness (US part: 40 km; Dakhla part: 27-28 km), iii) the large SDRs presence on the US side against few magmatic intrusions in the Moroccan crust, and iv) the occurrence of an underplated dense body at the ocean-continent transition on the US side. From a crustal point of view, the rifting is generally considered as relatively symmetrical (Biari et al, 2021), with potential asymmetry between Nova Scotia and northern Morocco (Maillard et al, 2006). South of Western Sahara, no comparison could be realized between the margins of Mauritania-Senegal and southern United States (Biari et al, 2021).…”

Section: Alongshore Crustal Structure Of the Passive Margin Segmentsmentioning

confidence: 99%

See 3 more Smart Citations

Phanerozoic cooling events in the continental rims of the Central Atlantic Ocean.

Charton¹,

Leprêtre²

2022

Preprint

View full text Add to dashboard Cite

In this review, we have digitized and georeferenced over 7000 Low-Temperature Thermochronology (LTT) data points and 750 Time-Temperature Modelling (TTM) results from 252 published works. The study area includes the continental crusts adjacent to the rifted margins (~Late Triassic to Early Jurassic) of the Central Atlantic Ocean and its direct neighbours. Our main intention is to map out the thermal cooling events as recorded by LTT data and as illustrated by TTM results. The time interval targeted in this review is the Phanerozoic (i.e., 540 to 0Ma), which is possible thanks to LTT ages spanning this entire period in the study area. It allows us to investigate the thermal evolution of the continental rims of the Central Atlantic Ocean at an unprecedented scale. In rifted margins and their shoulders, a debate exists whether the LTT-recorded cooling is the results of post-rift erosional exhumation or post-heating thermal relaxation, especially for the area directly in the vicinity of the paleo-rift zone. We therefore devised a short workflow to examine these propositions by filtering out the LTT dataset and spatially plotting the LTT ages. Furthermore, we investigate the relationship between LTT ages and distance from the Continent-Ocean Boundary/Transition Zone. LTT ages alone have often been described as bearing little geological meaning, thus requiring to run TTM in order to reconstruct the thermal/geological history, as several factors are to be taken into account in the thermal history reconstruction. Here, we examine whether a statistically significant LTT dataset can serve as a proxy in the reconstruction of cooling events. To this end, we compare peaks of LTT cooling ages and of TTM cooling event. Our investigation reveals that i) generalised cooling occurred in the pre-, syn-, and post-rift phases of the Central Atlantic, ii) there is a clear LTT age oceanward youngening trend, iii) the lack of LTT age with a syn-rift signal within ~500km along the shorelines suggests erosional exhumation (i.e., vertical movements) as main driver of the cooling, and iv) large LTT datasets bear meaning on the cooling events and thus on vertical movements, at least in this case studies in the rims of the Central Atlantic Ocean.

show abstract

Section: Alongshore Crustal Structure Of the Passive Margin Segmentsmentioning

confidence: 73%

Section: Alongshore Crustal Structure Of the Passive Margin Segmentsmentioning

confidence: 78%

Section: Central Atlantic Geological Historymentioning

confidence: 99%

Section: Alongshore Crustal Structure Of the Passive Margin Segmentsmentioning

confidence: 99%

See 2 more Smart Citations

Phanerozoic cooling events in the continental rims of the Central Atlantic Ocean.

Charton¹,

Leprêtre²

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Secondly, the rifting architecture varies greatly depending on the crustal thickness, structural fabric and directions, lithospheric rheology, potential magmatic activity, and the rate of spreading (e.g. Biari et al, 2021;Reuber and Mann, 2019;Kukla et al, 2018). With respect to our study region, we can conclude that erosion provoked by the changes in the Lower Congo landscape during continental rupture was not pervasive enough to produce a clear signal in the AFT system.…”

Section: Middle Jurassic To Late Cretaceousmentioning

confidence: 73%

Exhumation of the passive margin of the DR Congo during pre- and post- Gondwana breakup: Evidence from low-temperature thermochronology, geology and geomorphology

et al. 2022

View full text Add to dashboard Cite

What Can We Learn from Marine Geophysics to Study Rifted Margins?

Watremez¹

2022

Continental Rifted Margins 1

View full text Add to dashboard Cite

Structure and evolution of the Atlantic passive margins: A review of existing rifting models from wide-angle seismic data and kinematic reconstruction

Cited by 21 publications

References 351 publications

Phanerozoic cooling events in the continental rims of the Central Atlantic Ocean.

Phanerozoic cooling events in the continental rims of the Central Atlantic Ocean.

Exhumation of the passive margin of the DR Congo during pre- and post- Gondwana breakup: Evidence from low-temperature thermochronology, geology and geomorphology

What Can We Learn from Marine Geophysics to Study Rifted Margins?

Contact Info

Product

Resources

About