Origin of transverse folds in an extensional growth-fault setting: Evidence from an extensive seismic volume in the western Gulf of Mexico

McDonnell, A.; Jackson, Martin P. A.; Hudec, Michael R.

doi:10.1016/j.marpetgeo.2010.03.006

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…Dal et al (2006) suggested that contractional features beneath the shelf are Paleocene-Eocene in age and record toe-of-slope shortening. Partly, on the basis of drilling results from the deep-shelf gas play, McDonnell et al (2009McDonnell et al ( , 2010 and Jackson et al (2011) argued that most of the shortening is Oligocene-Miocene.…”

Section: Geologic Backgroundmentioning

confidence: 99%

“…This area of mild diffuse shortening in the ultradeep shelf contains pillow fold belts of varying age. Halokinetic salt pillows were mildly shortened in a broad area during the Paleocene-Eocene (Philippe et al, 2005;Dal et al, 2006;Guerin et al, 2006), in the Oligocene in the Texas ultradeep shelf (McDonnell et al, 2009(McDonnell et al, , 2010 (Figures 3, 5A), and during the Miocene in the Louisiana ultradeep shelf (Jackson et al, 2011) (Figures 3, 5B). In both areas, the folds are interpreted as compressional because of the presence of thrust faults and an isopachous interval deposited before folding.…”

Section: Recognizing Pillow Fold Beltsmentioning

confidence: 99%

“…Most of these growth faults flatten at a mid-level of stratigraphy, probably on welded salt canopies. However, below the shelf, they root seaward into the deep salt via the Clemente-Tomas and Corsair fault systems (Diegel et al, 1995;Peel et al, 1995;Radovich et al, 2007;Kilsdonk et al, 2010;McDonnell et al, 2010). To supply the translation necessary to feed contraction farther distally, extension along these canopies near the present coastline would have had to sole out on the deep salt updip of the pillow fold belts.…”

Section: Effects Of Interior Uplift On Salt Tectonics In the Gulf Of mentioning

confidence: 99%

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Coeval extension and shortening above and below salt canopies on an uplifted, continental margin: Application to the northern Gulf of Mexico

Dooley¹,

Jackson²,

Hudec³

2013

Bulletin

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Section: Geologic Backgroundmentioning

confidence: 99%

Section: Recognizing Pillow Fold Beltsmentioning

confidence: 99%

Section: Effects Of Interior Uplift On Salt Tectonics In the Gulf Of mentioning

confidence: 99%

See 1 more Smart Citation

Coeval extension and shortening above and below salt canopies on an uplifted, continental margin: Application to the northern Gulf of Mexico

Dooley¹,

Jackson²,

Hudec³

2013

Bulletin

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“…Where salt extrusion outpaces dissolution, it spreads laterally as an allochthonous salt sheet over younger strata. Worrall & Snelson, 1989;Diegel et al, 1995;Peel et al, 1995;McDonnell et al, 2009McDonnell et al, , 2010. 1; Hudec & Jackson, 2006.…”

Section: Introductionmentioning

confidence: 99%

“…Buried allochthonous salt sheets are most common in the northern Gulf of Mexico (Figs 2 and 3). Peel et al, 1995;Rowan et al, 2004;Mount et al, 2006;Radovich et al, 2007;McDonnell et al, 2009McDonnell et al, , 2010, (3) field geology and surveying of spectacularly exposed subaerial salt glaciers (namakiers) in Iran (e.g. Worrall & Snelson, 1989;Diegel et al, 1995;Peel et al, 1995;McDonnell et al, 2009McDonnell et al, , 2010.…”

Section: Introductionmentioning

confidence: 99%

Breakout of squeezed stocks: dispersal of roof fragments, source of extrusive salt and interaction with regional thrust faults

2014

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We used seven scaled physical models to explore the near-surface structural evolution of shallowly buried, actively rising salt stocks. The models consisted of dry sand, ceramic microspheres and silicone. Previously dormant stocks rose because of lateral squeezing or pumping of salt from below. The pressure of rising salt created a dynamic bulge in the crest of the diapir, which arched the overlying roof sediments. Eventually this dynamic bulge collapsed and its overlying roof broke into rafts along subradial grabens. The rafts were dispersed outwards by shear traction of spreading salt, surmounting an upturned collar of country rock and eventually grounding at the front of the extrusive flow. Flow of salt around these stranded fragments created a lobate extrusion front, common in submarine salt sheets in the Gulf of Mexico and subaerial salt glaciers in Iran. Stock geometry, regional dip and roof density affected extrusion rates and spreading directions. Stocks leaning seaward extruded salt faster and farther than did upright stocks. Dense roofs foundered and plugged the vent, limiting surface extrusion. In tilted models, broad salt sheets spread asymmetrically downslope. Stock contents were inverted within the extruded salt sheet: successively deeper parts of the stock's core rose to the surface and overran salt extruded from the shallower parts of the diapir. As shortening continued, salt from the source layer reached the surface after being driven out by thrusting. A central thrust block, or primary indenter, moved ahead of surrounding thrust blocks, impinging against and squeezing the stock into an elliptical planform. After high shortening, secondary indenters converged obliquely into the salt stock, expelling salt from the periphery of the diapir. The models shed light on (1) the origin and fate of large rafts or carapace blocks atop allochthonous salt, (2) cuspate margins of salt sheets and (3) interaction of thrusting, diapir pinch-off and emplacement of allochthonous salt sheets.

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Structural characteristics and formation mechanisms of Bayanhushu Sag in Hailar Basin, north‐east China: A study based on structural physical simulation

Liu

Yang

et al. 2021

Geological Journal

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The Hailar Basin, located in north‐east China, is a typical continental rifted basin that contains oil and gas. The basin formation process comprised several stages of construction and reformation with complex formation mechanisms. The Bayanhushu (BYHS) Sag is a secondary structural unit in the south‐west Hailar Basin with a significant resource potential, but its current poor exploration and insufficient understanding of the structural evolution characteristics are restricting further oil and gas exploration. Therefore, the study of the structural evolution of the BYHS Sag plays a pivotal role in the future exploration and development of oil and gas. There are different hypotheses on the formation mechanisms and structural evolution of the BYHS Sag. To further understand the evolutionary history of the BYHS Sag, a structural physical simulation experiment was used based on the structural interpretation and geometric analysis of a seismic section. Inversion validation was then undertaken by the 2DMove equilibrium profile recovery technology. It was found that the formation process of the BYHS Sag was mainly controlled by the western Adunchulu Fault. Faults on the section developed in succession from top to bottom. The fault plane experienced multiple changes, thus forming a special seat‐shaped structural pattern. Structural inversion occurred twice during the evolution of the sag. The compressive stress during the tectonic inversion mainly acted in a SE direction. It is inferred that this was related to the subduction of the Palaeo‐Pacific Plate under the Eurasian Plate and the intermittent compression caused by the transmission of stress of the arc–continent collision.

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Origin of transverse folds in an extensional growth-fault setting: Evidence from an extensive seismic volume in the western Gulf of Mexico

Cited by 12 publications

References 42 publications

Coeval extension and shortening above and below salt canopies on an uplifted, continental margin: Application to the northern Gulf of Mexico

Coeval extension and shortening above and below salt canopies on an uplifted, continental margin: Application to the northern Gulf of Mexico

Breakout of squeezed stocks: dispersal of roof fragments, source of extrusive salt and interaction with regional thrust faults

Structural characteristics and formation mechanisms of Bayanhushu Sag in Hailar Basin, north‐east China: A study based on structural physical simulation

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