Mesozoic and Early Cenozoic Development of the Texas Margin: A New Integrated Cross-Section from the Cretaceous Shelf Edge to the Perdido Fold Belt

David, J.Hall; Bowen, Bruce E.; Rosen, Rashel N.; Wu, Shaohua; Bally, A. W.

doi:10.5724/gcs.92.13.0021

Cited by 25 publications

(5 citation statements)

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“…The unit serves as the major decollement layer in the fold belt, correlates to the stratigraphic position of the Louann Salt, and converges with the allochthonous salt that fringes the Perdido fold belt. Consequently, the unit has been interpreted as autochthonous Louann Salt (Martin 1980;Worral and Snelson 1989;Weimer and Buffler 1992;Hall et al, 1993;Fiduk et al, 1995;Peel et al, 1995;Trudgill et al, 1995Trudgill et al, , 1999Rowan et al, 2000) but has not been confirmed by well control. Accepting the interpretation that the Perdido fold belt is underlain by a ductile decollement of variable thickness ( Figure 2b) is a key observation that discounts the duplex-cored fault-bend fold model of Mount et al (1990).…”

Section: Geometricmentioning

confidence: 91%

“…Structural interpretation has a rich history in the Perdido fold belt (e.g., Fuqua, 1990;Mount et al, 1990;Weimer and Buffler, 1992;Hall et al, 1993;Peel et al, 1995;Trudgill et al, 1995;Novoa et al, 1998;Trudgill et al, 1999;Rowan et al, 2000;Camerlo and Benson, 2001). The folds have been used as type examples for growth fold models and structural type examples for restoration models.…”

Section: Introductionmentioning

confidence: 97%

“…Weimer and Buffler (1992) published a schematic cross section modified from Blickwede and Queffelec (1988) depicting the belt as a series of fault blocks bounded by large reverse faults with flat-topped to gently folded convex-upward crests. Hall et al (1993) interpreted the belt as salt-cored detachment folds bounded by large reverse faults. Peel et al (1995) explicitly distinguished their interpretation of the Perdido fold belt as reverse-faulted, salt-cored buckle folds from the duplex-cored model of Mount et al (1990).…”

Section: Introductionmentioning

confidence: 98%

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Geometric and seismic interpretation of the Perdido fold belt: Northwestern deep-water Gulf of Mexico

Camerlo¹,

Benson²

2006

Bulletin

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We interpret the Perdido fold belt to be composed of detachment folds flanked by megascopic-scale kink bands. The two previous principal fold models for the Perdido fold belt incorporated components of large-scale faulting: an imbricate fault-bend fold model and a high-angle, reverse-faulted detachment fold model. We interpret the Perdido fold belt to be fold dominated. The belt consists of detachment folds overlying a ductile decollement layer. The detachment fold crests are bounded by kink bands, which are narrow zones of angularly folded strata. The low-reflectivity, low-signal-tonoise zones seen in seismic profiles across the Perdido fold belt are poorly imaged sections of the folds that result from steeply dipping bedding in the kink bands. The substantial width of these lowreflectivity zones, their subparallel edges in cross section, and their orientation at a high angle to layering, as well as their organized spacing and conjugate geometry, support a kink-band interpretation. Propagating reverse faults are unlikely in the folds because of the absence of backlimbs overlying the locations of hypothetical faults. Improved seismic imaging efforts have illuminated steeply dipping bedding that is not cut by faulting in many of the lowreflectivity zones in the Perdido fold belt.

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Section: Geometricmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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Geometric and seismic interpretation of the Perdido fold belt: Northwestern deep-water Gulf of Mexico

Camerlo¹,

Benson²

2006

Bulletin

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“…Shales are detached along a mixed salt-shale detachment, which corresponds to a remanent weld (Fig. 2) of the allochthonous salt in northern GOM (e.g., Hall et al, 1993;Diegel et al, 1995;Peel et al, 1995;Rowan et al, 2004Rowan et al, , 2006Radovich et al, 2007;Hudec et al, 2013). Descriptions of the general structure and seismo-stratigraphy of the area, the structural position and general geometry of the mobile shales, and the configuration of the allochthonous salt are detailed in Hudec et al (in review).…”

Section: D Seismic Interpretationmentioning

confidence: 99%

Mud volcanoes guided by thrusting in compressional settings

Soto

Hudec

2023

Geology

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Mud volcanoes are fed largely by fracture systems, but fracture systems are common in fold-and-thrust belts (FTBs), and not all of them extrude mud volcanoes. One popular hypothesis is that mud volcanoes extrude up normal faults and fractures in the crests of thrust-related anticlines. Using a high-resolution depth-migrated seismic cube in the northwestern Gulf of Mexico, we demonstrate the occurrence of buried mud volcanoes (shale sheets) that appear to have been fed by fluids moving up the thrust faults themselves. Mobile shales in this deepwater FTB detach a mostly welded allochthonous salt sheet. The main phase of shortening was during the Miocene, accompanying the sedimentation. Shortening generated multiple detachment levels, stacked duplexes, thrusts, and folds affecting the Oligocene mobile shales. Above these detachments, syn-sedimentary shortening initially generated detachment folds that progressively evolved into upward-propagating listric thrusts and fault-propagation anticlines. Shale sheets formed near the central thrust domains, associated with higher fault dips and larger fault displacements. We argue that their feeder systems were probably thrust-related shear zones that widened upward and comprised networks of anastomosing fractures. Finally, we propose that the position of mud volcanoes with respect to the underlying thrust systems depends on the path of least resistance to the surface. Although overpressured muds may vertically reach the surface via extensional fractures in the crests of thrust-related anticlines, we have shown to the contrary that when thrusts are emergent in a deepwater FTB, fluids continue up the inclined thrusts and adjacent fractures, forming mud volcanoes at the thrust tips.

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“…We place basementin parentheses becauseno workablebasementstructuremap has yet been publishedin the Gulf Coast province;accordingly, no agreementtoday existsin Industryabout the presenceor economicvalueof basementstructurein the Gulf Coastprovince(forexample, Worrall and Snelson,1989;Salvador,1991;Hall et al, 1993). We place basementin parentheses becauseno workablebasementstructuremap has yet been publishedin the Gulf Coast province;accordingly, no agreementtoday existsin Industryabout the presenceor economicvalueof basementstructurein the Gulf Coastprovince(forexample, Worrall and Snelson,1989;Salvador,1991;Hall et al, 1993).…”

Section: Mexicomentioning

confidence: 99%

Gulf Coast "Sub-Salt" Play Exploration Strategies

Pratsch¹

1995

All Days

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This paper wea selaeted for presentation by the OTC Program Oommittaa fellowing ravlew of information eonlalnad in an abstraot submlttbd by the author(s). Oontents of the paper, as presented, have not been fevkswedby the Offshore Technology Conference end are sub@t to mrrectlon by the author(s). The materlsf, as presented, doea not neseaaarlly refleot eny position of the Offshore Technology Conference or Ite offioere. Permissionto mpy Ie raatrtotedto en abatraot of not mere than 300 words. Illustrations may not be mpiad. The ebstrsot should eentein conspicuous acknowledgment of where and by whom the paper is presentad. ABSTRACTSuccessful exploration strategiesin the new offshoreGulf CoastMio-Pliocene oil and gas ("Sub-Salt-) plaY will includethe entirePetroleumSysteminvolvedfrom pre-Miocenesourcebed deposition onward. On the shelf,primaryaccumulations occurred in pre-LateMiocenetime and reservoirs; in deep-water areas,hydrocarbon generation, migration,and entrapment occurredjust duringthe last few millionyears. In both scenarios, deep (pre-Miocene) structural configuration is decisivefor the selection of most prospective acreageblock~,using established regionalhydrocarbon migration principles.Referencesand one illustration at end of paper.

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Mesozoic and Early Cenozoic Development of the Texas Margin: A New Integrated Cross-Section from the Cretaceous Shelf Edge to the Perdido Fold Belt

Cited by 25 publications

References 0 publications

Geometric and seismic interpretation of the Perdido fold belt: Northwestern deep-water Gulf of Mexico

Geometric and seismic interpretation of the Perdido fold belt: Northwestern deep-water Gulf of Mexico

Mud volcanoes guided by thrusting in compressional settings

Gulf Coast "Sub-Salt" Play Exploration Strategies

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