On a tectonic mechanism for regional sealevel variations

Cloetingh, S.A.P.L.; McQueen, Herbert; Lambeck, Kurt

doi:10.1016/0012-821x(85)90098-6

Cited by 276 publications

(98 citation statements)

References 39 publications

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“…The timing of these short-term events is correlatable over wide areas. These features support an interpretation of the short-term anomalous uplift and subsidence events in terms of changes in intraplate stress fields (Cloetingh et al, 1985Cloetingh and Kooi, 1992a).…”

Section: Relationship Between Regional Subsidence Of the Russian Platsupporting

confidence: 84%

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

et al. 1996

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We review the structure and evolution of a number of Riphean-Phanerozoic rifts and extensional basins within the territory of the former Soviet Union (FSU). Horst-and-graben formation in strong crustal and subcrustal lithosphere layers can explain the multi-trough character of rift systems observed in the Russian platform, the Vilyuy rift, the West Siberian rift system, the Pechora-Kolva rift system and the Laptev Sea rift. Many features in the evolution of these rifted basins are incompatible with predictions of classical stretching models. Basin subsidence often occurs in the absence of any noticeable stretching and over time scales much longer than predicted by models of thermal subsidence. Other observations include a time gap between rifting and the onset of post-rift basin subsidence of tens to hundreds Ma and a correlation in timing of subsidence phases of rifted basins and platforms with opening and closure events of adjacent ocean basins. These observations point to an important role for mechanisms such as eclogite formation within or beneath the lithosphere as well as intraplate compression and stress-induced lithospheric deflection.

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Section: Relationship Between Regional Subsidence Of the Russian Platsupporting

confidence: 84%

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

et al. 1996

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“…Typically, such unconformities are confined to the flanks of the delta. This is illustrated by the distribution of 'channels' (Figs 7,12,14) of which the origin can be linked with compressive intraplate stresses during the growth of the delta that produce short-lived uplift (relative sea-level fall) and with associated localised unconformities in the flanks of the basin (Cloeting et al, 1985). Downdip channel fills are commonly associated with time-equivalent gravity deposits.…”

Section: Cyclicitymentioning

confidence: 99%

Stratigraphy and sedimentology of the Niger Delta

Reijers¹

2011

Geologos

205

148

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During the Cenozoic, until the Middle Miocene, the Niger Delta grew through pulses of sedimentation over an oceanward-dipping continental basement into the Gulf of Guinea; thereafter progradation took place over a landward-dipping oceanic basement. A 12,000 m thick succession of overall regressive, offlapping sediments resulted that is composed of three diachronous siliciclastic units: the deep-marine pro-delta Akata Group, the shallow-marine delta-front Agbada Group and the continental, delta-top Benin Group.Regionally, sediment dispersal was controlled by marine transgressive/regressive cycles related to eustatic sealevel changes with varying duration. Differential subsidence locally influenced sediment accumulation. Collectively, these controls resulted in eleven chronostratigraphically confined delta-wide megasequences with considerable internal lithological variation.The various sea-level cycles were in or out of phase with each other and with local subsidence, and interfered with each other and thus influenced the depositional processes. At the high inflection points of the long-term eustatic sea-level curve, floodings took place that resulted in delta-wide shale markers. At the low inflection points, erosional channels were formed that are often associated, downdip, with turbidites in low-stand sediments (LSTs). The megasequences contain regional transgressive claystone units (TST) followed by a range of heterogeneous fine-to-coarse progradational or aggradational siliciclastic (para)sequence sets formed during sea-level high-stand (HST).An updated biostratigraphic scheme for the Niger Delta is presented. It also updates a sedimentation model that takes into consideration local and delta-wide effects of sea-level cyclicity and delta tectonics. Megasequences were formed over time intervals of ~5 Ma within individual accurate megastructures that laterally linked into depobelts. The megasequences form the time-stratigraphic frame of the delta and are the backbone for the new delta-wide lithostratigraphy proposed here. Such a new lithostratigraphy is badly needed, in particular because of the vigorous new activity in the offshore part of the Niger Delta (not covered in this contribution). There, as well as in the onshore part of the delta, the traditional lithostratigraphic subdivision of the Cenozoic Niger Delta section into three formations is insufficient for optimum stratigraphic application; moreover, the various informal subdivisions that have been proposed over time are inconsistent.

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“…This suggests that while the margins of the basin were being uplifted, the center was subsiding. This can be the result of the onset of compression following a mechanism proposed by Cloething et al (1985), who described how variations in horizontal stresses in the lithosphere interact with deflections of the lithosphere caused by sedimentary loading. The zone of active thrusting is located at the hinge between these two domains.…”

Section: Timing Of Tectonic Eventsmentioning

confidence: 99%

Neogene Kinematics in the Japan Sea Region and Volcanic Activity of the Northeast Japan Arc

Jolivet¹

1992

Proceedings of the Ocean Drilling Program

104

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Deep sea drilling in the Japan Sea during ODP Legs 127 and 128 brought new constraints to the timing and dynamics of backarc opening. The nature and age of the oceanic basement as well as the recovered lithology allow us to present new reconstructions from 25 Ma to the present. On-land deformation data as well as the offshore crustal structure and timing of volcanic events are the major constraints we use. The Japan Sea opened as a complex pull-apart basin in a dextral shear zone that extends more than 2000 km from Central Japan to Northern Sakhalin. Oceanic crust was emplaced in the northern part of the Japan Basin, and highly extended arc crust in the Tsushima and Yamato basins. Westward propagation of oceanic spreading was active in the early Miocene. Our reconstructions give a minimum estimate for the finite dextral displacement of about 400 km. We observe correlations between volcanic events and tectonic phases, and we explore the hypothesis that variations in the character of volcanism during the Neogene in Northeast Japan can be due to changes in the tectonic status of the arc crust other than deep-seated variations in the mantle: (1) starvation of the volcanic activity in the late Miocene (10-7 Ma) is correlated with a reorganization of the stress field over the whole region from a dextral transtensional field during the Japan Sea opening to the present compressional field, and this period of inversion did not allow the ascent of magma through the upper brittle crust; (2) correlation is also seen between the formation of the incipient subduction zone at 1.8 Ma along the eastern margin of the Japan Sea and the transition from acidic to andesitic volcanism in Northeast Japan. Compression between 7 and 2 Ma is associated with the formation of large calderas and eruptions of acidic products, after which the present-day andesitic volcanism began at 2 Ma. During the compressive period the magma could not easily make its way up to the surface and stayed longer in the deep crust, where it could differentiate until the formation of a caldera. After localization of strain along the eastern margin of the Japan Sea and inception of the new subduction zone, which partly released the stress across the arc, the ascent of magma became much easier and the character of surface eruptions thus changed to less explosive. We also discuss the migration of the volcanic front through time from 30 Ma to the present with respect to tectonic processes.

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On a tectonic mechanism for regional sealevel variations

Cited by 276 publications

References 39 publications

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

Stratigraphy and sedimentology of the Niger Delta

Neogene Kinematics in the Japan Sea Region and Volcanic Activity of the Northeast Japan Arc

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