Strike‐slip basins: Part 1

Nilsen, Tor H.; Sylvester, Arthur G.

doi:10.1190/1.1438170

Cited by 52 publications

(47 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, strike-slip basins associated with transform or transcurrent faults frequently form in transpressional orogens (Nilsen and Sylvester 1995). Furthermore, shear zones may constitute the boundaries between accreted terranes, and their study can provide insights into the history of accretion involved in the evolution of an orogen.…”

Section: Introductionmentioning

confidence: 99%

The Sierra Ballena Shear Zone in the southernmost Dom Feliciano Belt (Uruguay): evolution, kinematics, and deformation conditions

Oyhantçabal

Siegesmund

Wemmer

et al. 2009

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

The Sierra Ballena Shear Zone (SBSZ) is part of a high-strain transcurrent system that divides the Neoproterozoic Dom Feliciano Belt of South America into two different domains. The basement on both sides of the SBSZ shows a deformation stage preceding that of the transcurrent deformation recognized as a high temperature mylonitic foliation associated with migmatization. Grain boundary migration and fluid-assisted grain boundary diffusion enhanced by partial melting were the main deformation mechanisms associated with this foliation. Age estimate of this episode is [658 Ma. The second stage corresponds to the start of transpressional deformation and the nucleation and development of the SBSZ. During this stage, pure shear dominates the deformation, and is characterized by the development of conjugate dextral and sinistral shear zones and the emplacement of syntectonic granites. This event dates to 658-600 Ma based on the age of these intrusions. The third stage was a second transpressional event at about 586 to \560 Ma that was associated with the emplacement of porphyry dikes and granites that show evidence of flattening. Deformation in the SBSZ took place, during the late stages, under regional low-grade conditions, as indicated by the metamorphic paragenesis in the supracrustals of the country rocks. Granitic mylonites show plastic deformation of quartz and brittle behavior of feldspar. A transition from magmatic to solid-state microstructures is also frequently observed in syntectonic granites. Mylonitic porphyries and quartz mylonites resulted from the deformation of alkaline porphyries and quartz veins emplaced in the shear zone. Quartz veins reflect the release of silica associated with the breakdown of feldspar to white mica during the evolution of the granitic mylonites to phyllonites, which resulted in shear zone weakening. Quartz microstructures characteristic of the transition between regime 2 and regime 3, grain boundary migration and incipient recrystallization in feldspar indicate deformation under lower amphibolite to upper greenschist conditions (550-400°C). On the other hand, the mylonitic porphyries display evidence of feldspar recrystallization suggesting magmatic or high-T solid-state deformation during cooling of the dikes.

show abstract

Section: Introductionmentioning

confidence: 99%

The Sierra Ballena Shear Zone in the southernmost Dom Feliciano Belt (Uruguay): evolution, kinematics, and deformation conditions

Oyhantçabal

Siegesmund

Wemmer

et al. 2009

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

show abstract

“…The variability and complexity of sedimentary basins associated with strike-slip faults are almost as great as for all other types of basins (Nilsen & Sylvester 1995, 1999a. ChristieBlick & Biddle (1985) provided a comprehensive summary of the structural and stratigraphic development of strike-slip basins, based largely on the work of Crowell (1974a, b) (Fig.…”

Section: Strike-slip Basinsmentioning

confidence: 86%

“…However, basins formed in compressional settings will have an abundance of folding and reverse fault activity. tion of extension relative to the direction of bulk shear strain, the overstepping arrangement of discontinuous and discrete fault segments, and on the bending geometry of the fault (Nilsen & Sylvester 1995). Transtensional (including pullapart) basins form near releasing bends (Crowell 1974b), while basins associated with crustal rotations about vertical axes, within the rotating blocks (transrotational basins, after Ingersoll, 1988) may experience any combination of extension, compression and strike-slip.…”

Section: Ridge Basinmentioning

confidence: 99%

“…(1) mismatches across basin margins; (2) longitudinal and lateral basin asymmetry; (3) episodic rapid subsidence; (4) abrupt lateral facies changes and local unconformities; and (5) marked contrasts in stratigraphy, facies geometry, and unconformities among different basins in the same region (Nilsen & Sylvester 1995).…”

Section: Models Of Sedimentation In An Extensional Setting (Local Scale)mentioning

confidence: 99%

“…(1) the degree of convergence and divergence of adjacent blocks; (2) the magnitude of displacement; (3) the material properties of deformed rocks; and (4) the existence of pre-existing structures (Nilsen & Sylvester 1995, 1999a.…”

Section: Strike-slip Basinsmentioning

confidence: 99%

See 2 more Smart Citations

Tracing tectonic deformation using the sedimentary record: an overview

McCann

Saintot

2003

View full text Add to dashboard Cite

Tectonic activity, on a range of scales, is a fundamental control on sedimentary activity. The range of structural deformation within a region extends from the plate tectonic scale, governing, for example, rift initiation, to the basin scale, with the formation of basinbounding faults. Internal basin configuration is also strongly influenced by tectonic activity. However, the relationship between tectonic activity and sedimentation is a complex one, given the many additional factors which can also influence sedimentary activity, including erosion, sediment transport, source area lithology, groundwater chemistry, range of depositional environments, climate, eustasy, and the relative location of an area and its distality to marine influences. In this paper we provide a selective overview of the issues associated with the interlinked themes of tectonics and sedimentation, examining the main basin types forming in both extensional and compressional plate settings. We then review the various models of sedimentation in the selected basins, both on a local and a basinal scale. Finally, we look to the future -providing a series of possible research areas, almost exclusively multidisciplinary, which would help to improve existing models of interlinked sedimen~tectonics systems.Sedimentary basins, and the depositional successions within them, provide the most tangible and accessible records of the lithospheric, geographical, oceanographic and ecological developments which occur in a specific area over a specific period of time. Tectonic activity, on a range of scales, is a major control on sedimentary activity. In recent years there has been an increase in the number of studies aiming to unravel the links between tectonic events and sedimentary response, both on a basin and intrabasinal scale (e.g.

show abstract

Palaeoenvironmental evaluation by geochemical proxies of fluvio‐lacustrine core log from the Late Miocene–Pliocene Maritsa Iztok Basin, Bulgaria

Milakovska

Stefanova

Vladislavov³

et al. 2020

Geological Journal

View full text Add to dashboard Cite

A sequence of three lignite seams and interlayering carbonaceous mudstone is characterized by geochemical proxies. The study is extended by the palaeoenvironmental details given by the fossil fauna (gastropods, ostracods, and fishes). The predominant minerals (quartz and kaolinite) and main oxide relations of the carbonaceous mudstone point to sand and clay washed from weathered and/or altered felsic rocks from the catchment area. The mudstone features to deposition from suspension in standing or slow to persistently moving fresh waters at the bottom of the core log, and slightly aerated, warm, fresh to low saline, acidic to alkaline waters on the top. Three communities of organisms are depicted. The first is the pre‐swamp environment characterized by standing or slow moving fresh waters and detrital organic matter deposition. The second is the environment of swamp of detrital forest trunks. Depending on the climate and water table, the main forest communities are of trees of families Cupressaceae, Taxodiaceae, and Podocarpaceae accompanied by trees of family Betulaceae, and herbaceous plants. Different Sphagnum species are also abundant. The dry/cold environment is reflected in the herbaceous organic matter deposition. Polar terpenoids ratio differentiates slight climatic oscillations for the samples with a strong Gymnospermae dominance. The second coal seam development reflects the optimum tectonic conditions for peat growth in a cold and dry climate leading up to 25 m lignite deposition. The third is the moss swamp environment with very fluctuating elements. At the top of the log, a Sphagnum‐dominated peat has developed.

show abstract

Strike‐slip basins: Part 1

Cited by 52 publications

References 0 publications

The Sierra Ballena Shear Zone in the southernmost Dom Feliciano Belt (Uruguay): evolution, kinematics, and deformation conditions

The Sierra Ballena Shear Zone in the southernmost Dom Feliciano Belt (Uruguay): evolution, kinematics, and deformation conditions

Tracing tectonic deformation using the sedimentary record: an overview

Palaeoenvironmental evaluation by geochemical proxies of fluvio‐lacustrine core log from the Late Miocene–Pliocene Maritsa Iztok Basin, Bulgaria

Contact Info

Product

Resources

About