Mid-Tertiary plutonism and mylonitization, South Mountains, central Arizona

Reynolds, Stephen J.; Rehrig, William A.

doi:10.1130/mem153-p159

Cited by 38 publications

(24 citation statements)

References 3 publications

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“…Gautier et al, 1999;Sullivan and Snoke, 2007) and (2) the genetic link between regional-scale extension and magmatism in a broad sense (e.g. Crittenden et al, 1980;Reynolds and Rehrig, 1980;Coney and Harms, 1984;Lynch and Morgan, 1987;Lister and Davis, 1989;Tomassi et al, 1994;Gautier et al, 1999;Corti et al, 2003;Tirel et al, 2008;Péron-Pinvidic et al, 2009;Rey et al, 2009a, b).…”

Section: Introductionmentioning

confidence: 99%

Timing, duration and role of magmatism in wide rift systems: Insights from the Jiaodong Peninsula (China, East Asia)

et al. 2013

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In East Asia, widespread extensional sedimentary basins together with the close association of Metamorphic Core Complexes and magmatism are prominent features of the large-scale wide rift system developed during late Mesozoic times. This region thus appears as a proper place to study continental extension as well as questions about the link between continental extension and magmatism. This paper primarily provides pioneer exhumation time-constraints on the Linglong MCC (Jiaodong Peninsula) including cooling and deformation ages. MCC cooling at mid-crustal levels occurred at ca. 143 Ma. Besides, last ductile deformation occurred at ca. 134 Ma while final exhumation stages, under brittle 2 conditions, occurred as late as ca. 128 Ma. Continuous crustal stretching were then recorded by the emplacement of a synkinematic pluton in the upper crust at ca. 128 Ma that cooled fast below an intracrustal shear zone crossing the ductile-brittle transition at ca. 123 Ma. The ca. 120-118 Ma age cluster is ascribed to the fast cooling of undeformed plutons marking the end of extension that lasted, in the area, over a minimum period of ca. 30 My. Combining other MCC exhumation constraints and the onset of subsidence in the sedimentary basins, total duration of late Mesozoic extension in East Asia could be estimated at ca. 60 My, related with a rather long process for extension from 160 to at least 100 Ma. East Asian continental extension is heterogeneously distributed in space and time as revealed by fundamental differences between two end-member classes of migmatite-cored MCC already described in other wide rift systems. Extension seems to have first favoured partial melting which subsequently, in turn, maintained continental extension.

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Section: Introductionmentioning

confidence: 99%

Timing, duration and role of magmatism in wide rift systems: Insights from the Jiaodong Peninsula (China, East Asia)

et al. 2013

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“…First, previous modelling studies strongly suggest that local "soft" anomalies in the lower crust help to the initiation of MCC development, as discussed before (Tirel et al, 2008). Second, at regional-scale, widespread melting and/or magmatism can significantly reduce the bulk lithosphere strength, emphasizing continuous pervasive deformation of the deepest levels of the lithosphere (Van der Molen and Paterson, 1979;Reynolds and Rehrig, 1980;Coney and Harms, 1984;Lynch and Morgan, 1987; see synthesis in Handy and Brun, 2004). Then, within South Liaodong area, the continental crust mechanical behaviour in the Late Jurassic and Early Cretaceous may have been strongly controlled by melts generation at the onset and during the extension period.…”

Section: Role Of Crustal Partial Meltingmentioning

confidence: 99%

Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)

Charles¹,

Gumiaux²,

Augier³

et al. 2012

Tectonophysics

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International audienceMetamorphic Core Complexes (MCC) constitute remarkable features within wide rifts. Based on analogue and numerical modelling, MCC dynamics and structural development are mainly controlled by first geothermal gradient, second the compositional layering, and after the strain rate and partial melting. In the Late Mesozoic, continental extension occurred in East Asia leading to the development of MCC, magmatism and extensional sedimentary basins. Based on an integrated study (i.e. structural and finite strain analysis, petrofabrics, Anisotropy of Magnetic Susceptibility (AMS) and U/Pb on zircon dating), this paper aims at constraining the tectonic evolution and deformation mechanisms in the South Liaodong Peninsula (NE China). The Gudaoling massif is identified as a "migmatitic" MCC developed from Upper Jurassic (ca. 157-154 Ma) to Early Cretaceous (ca. 128-113 Ma). Intrusion of the Yinmawanshan synkinematic pluton (Early Cretaceous) to the south of the dome marks out the final stages of shearing along the Gudaoling detachment zone and of exhumation of the MCC into the upper crust. The Gudaoling MCC and the Yinmawanshan pluton stay in line with the coeval South Liaodong MCC, to the south, all making a ~ 140x30km wide extensional band formed during a regional E-W to NW-SE crustal stretching. The area shows a bi-phased development with a "slow" and a "fast" stage which correspond to (1) crustal necking and (2) dome amplification/exhumation stages according to published thermo-mechanical modelling results. Finally, the Gudaoling MCC lower unit almost exclusively displays migmatites and anatectic granitoids of Late Jurassic and Early Cretaceous, respectively. Occurrence of partial melting during earlier stages of extension seems controlling the initiation of MCC (as a soft anomaly within lower crust). In East Asia, a regional-scale thermal event, during Jurassic-Cretaceous times, may have significantly reduced the bulk lithosphere strength and locally induced partial melting, emphasizing pervasive deformations and development of a wide rift system

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“…According to this, rising mantle heat flow and/or mafic magma located at the bottom of the crust causes thermal softening and this initiates extension (Rehring and Reynolds, 1980;Reynolds, 1985;Gans et al, 1989;Lister and Baldwin, 1992).…”

Section: Mechanics and Geometry Of Detachment Faultsmentioning

confidence: 99%

Late Cenozoic Extensional Tectonics in Western Anatolia: Exhumation of the Menderes Core Complex and Formation of Related Basins

Seyítoğlu¹,

Işık²

2015

Bulletin of the Mineral Research and Exploration

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The Aegean region (Western Anatolia, Aegean Sea and Greece) is one of the areas of the earth under the effect of extensional tectonics and includes the typical features of core complexes in this type of region. The Menderes Massif in Western Anatolia was exhumed initially as an asymmetric core complex in the Early Miocene due to extension beginning in the Oligocene and then the central Menderes Massif was further exhumed as a symmetric core complex. This article discusses the exhumation mechanisms of the Menderes Massif and development of surrounding sedimentary basins in light of new findings. The proposed model successfully explains, the location of the Oligocene Kale basin, different movement directions of the Lycian nappes in northern and southern parts of the Datça-Kale Main Breakaway Fault and the top-to-the NNE directed shearing dominantly observed in the whole Menderes Massif.

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Mid-Tertiary plutonism and mylonitization, South Mountains, central Arizona

Cited by 38 publications

References 3 publications

Timing, duration and role of magmatism in wide rift systems: Insights from the Jiaodong Peninsula (China, East Asia)

Timing, duration and role of magmatism in wide rift systems: Insights from the Jiaodong Peninsula (China, East Asia)

Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)

Late Cenozoic Extensional Tectonics in Western Anatolia: Exhumation of the Menderes Core Complex and Formation of Related Basins

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