Constraints on deformation of the Southern Andes since the Cretaceous from anisotropy of magnetic susceptibility

Maffione, Marco; Hernandez‐Moreno, Catalina; Ghiglione, Matías C.; Speranza, Fabio; Hinsbergen, Douwe J.J. van; Lodolo, Emanuele

doi:10.1016/j.tecto.2015.10.008

Cited by 29 publications

(32 citation statements)

References 114 publications

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“…We therefore use anisotropy of magnetic susceptibility (AMS) as a complementary tool to our detailed field kinematic analysis and interpret the results on structural grounds. AMS is in fact a powerful tool for petrofabric analyses that may be used to characterize the regional strain evolution in deformed terranes [ Jelinek , ; Jelínek and Kropáček , ; Hrouda , ; Borradaile , , ; Jackson , ; Jackson and Tauxe , ; Rochette et al , ; Tarling and Hrouda , ; Parés and van der Pluijm , ; Soto et al , ; Maffione et al , ]. With AMS, rock samples can be measured more comprehensively, quickly, and reproducibly than with any other petrofabric technique.…”

Section: Anisotropy Of Magnetic Susceptibilitymentioning

confidence: 99%

Kinematics of a former oceanic plate of the Neotethys revealed by deformation in the Ulukışla basin (Turkey)

et al. 2016

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Kinematic reconstruction of modern ocean basins shows that since Pangea breakup a vast area in the Neotethyan realm was lost to subduction. Here we develop a first‐order methodology to reconstruct the kinematic history of the lost plates of the Neotethys, using records of subducted plates accreted to (former) overriding plates, combined with the kinematic analysis of overriding plate extension and shortening. In Cretaceous‐Paleogene times, most of Anatolia formed a separate tectonic plate—here termed “Anadolu Plate”—that floored part of the Neotethyan oceanic realm, separated from Eurasia and Africa by subduction zones. We study the sedimentary and structural history of the Ulukışla basin (Turkey); overlying relics of this plate to reconstruct the tectonic history of the oceanic plate and its surrounding trenches, relative to Africa and Eurasia. Our results show that Upper Cretaceous‐Oligocene sediments were deposited on the newly dated suprasubduction zone ophiolites (~92 Ma), which are underlain by mélanges, metamorphosed and nonmetamorphosed oceanic and continental rocks derived from the African Plate. The Ulukışla basin underwent latest Cretaceous‐Paleocene N‐S and E‐W extension until ~56 Ma. Following a short period of tectonic quiescence, Eo‐Oligocene N‐S contraction formed the folded structure of the Bolkar Mountains, as well as subordinate contractional structures within the basin. We conceptually explain the transition from extension, to quiescence, to shortening as slowdown of the Anadolu Plate relative to the northward advancing Africa‐Anadolu trench resulting from collision of continental rocks accreted to Anadolu with Eurasia, until the gradual demise of the Anadolu‐Eurasia subduction zone.

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Section: Anisotropy Of Magnetic Susceptibilitymentioning

confidence: 99%

Kinematics of a former oceanic plate of the Neotethys revealed by deformation in the Ulukışla basin (Turkey)

et al. 2016

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“…The AMS method, as has been demonstrated by Hrouda & Janak (1976) and Lee & Angelier (2000), is capable of detecting tectonic strains ranging from those only weakly through to those ductily imposed in deformed rocks. Magnetic fabric studies have also been applied to better understand a number of fold-and-thrust belts (Saint-Bezar et al 2002;Louis et al 2006;Robion et al 2007;Vasiliev et al 2009;Weil & Yonkee 2009;Maffione et al 2015). In this study, the HornsundÁSørkapp area in the southern part of the WSFTB was selected for the first time as a target for AMS investigation.…”

Section: Introductionmentioning

confidence: 99%

Applying the anisotropy of magnetic susceptibility technique to the study of the tectonic evolution of the West Spitsbergen Fold-and-Thrust Belt

et al. 2016

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“…(2) The AMS ellipsoid is transformed from oblate to triaxial (i.e., K max ≈ K int ≈ K min ) when it experiences a weak strain. Although K min remains perpendicular to the bedding and is concentrated in the projection center, K max tends to have a clustered distribution perpendicular to the direction of the compression (Larrasoaña et al, 2004;Parés, 2004. (3) As the strain increases, the AMS ellipsoid ultimately becomes prolate (i.e., K max ≫ K int ≈ K min ), K min values begin to deviate from the center of the projection plane and spread out along the direction of the strain and K max values become more tightly clustered (Borradaile, 2001;Maffione et al, 2015;Soto et al, 2009;Tang et al, 2012).…”

Section: 1029/2018gc007944mentioning

confidence: 99%

New Magnetic Constraints on Early‐Middle Miocene Uplift of the Liupan Shan, Northeastern Margin of the Tibetan Plateau

Chen

Xiong

et al. 2019

Geochem Geophys Geosyst

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New constraints on the uplift history of the Liupan Shan can improve our understanding of the tectonic consequences of the collision of the Indian and Asian plates, including the timing of the uplift of the Tibetan Plateau. Here we present a detailed magnetostratigraphy for the Kaimengou section near the piedmont of the Liupan Shan, which reveals that it spans the interval from 19.8 to 12.8 Myr. Together with the results of measurements of the anisotropy of magnetic susceptibility, rock magnetic measurements show that the anisotropy of magnetic susceptibility is dominated by antiferromagnetic hematite and/or paramagnetic minerals, both of which are mainly controlled by the preferred crystallographic orientation, which can be used to record the tectonic history. During 19.5–14.0 Myr, the maximum principal axis (Kmax) showed a pronounced N‐S orientation and Kmin began to exhibit a girdled distribution in an E‐W direction, indicating a slight to moderate tectonic strain in an E‐W direction. And the strain can be reconfirmed be the shape parameter (T). We attribute the strain to far‐field influence by the collision of the Indian and Asian plates. We also present a tentative conceptual model, which explains how the E‐W compression fits within the general tectonic scenario for the uplift of the Tibetan Plateau.

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Constraints on deformation of the Southern Andes since the Cretaceous from anisotropy of magnetic susceptibility

Cited by 29 publications

References 114 publications

Kinematics of a former oceanic plate of the Neotethys revealed by deformation in the Ulukışla basin (Turkey)

Kinematics of a former oceanic plate of the Neotethys revealed by deformation in the Ulukışla basin (Turkey)

Applying the anisotropy of magnetic susceptibility technique to the study of the tectonic evolution of the West Spitsbergen Fold-and-Thrust Belt

New Magnetic Constraints on Early‐Middle Miocene Uplift of the Liupan Shan, Northeastern Margin of the Tibetan Plateau

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