Comparison of Fry strain ellipse and AMS ellipsoid trends to tectonic fabric trends in very low-strain sandstone of the Appalachian fold–thrust belt

Burmeister, Kurtis C.; Harrison, Michael; Marshak, Stephen; Ferré, E. C.; Bannister, Roger A.; Kodama, Kenneth P.

doi:10.1016/j.jsg.2009.03.010

Cited by 40 publications

(27 citation statements)

References 44 publications

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“…Numerous studies have speculated that changes in magnetic fabrics can capture the earliest stage of deformation that occurred shortly after deposition and prior to lithification of the rocks, even where microscopic evidence of deformation is not visible [e.g., Kligfield et al , 1983; Cifelli et al , 2004; Burmeister et al , 2009]. Most recently published AMS data from Holocene sediments recovered in Lake Ussyk‐Kul in the Kyrgyz Tien Shan, ∼700 km west of our section, further indicates that tectonic fabric can be found in sediments as young as 25‐yr‐old, and locked within sediments older than 1180 yr before present [ Larrasoaña et al , 2011].…”

Section: Interpretationsmentioning

confidence: 99%

Anisotropy of magnetic susceptibility of the Jingou River section: Implications for late Cenozoic uplift of the Tian Shan

Tang¹,

Huang²,

Dong³

et al. 2012

Geochem Geophys Geosyst

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[1] Better constraints on the uplift history of Tian Shan will increase our understanding of both mountain building processes and deformation patterns related to the India-Asian collision. Anisotropy of magnetic susceptibility (AMS) holds great potential to track variations in tectonic strain, which is ultimately responsible for mountain uplift. Here we present an AMS record, spanning the interval of 28-4 Ma, from the fluviolucastrine Jingou River section in the Tian Shan foreland. Rock magnetic measurements show that the AMS are dominated by antiferromagnetic hematite and some paramagnetic minerals, both of which have a crystallographic preferred orientation, and therefore the AMS sequence may be applied to reconstruct tectonic strain. Although the principal minimum (K min ) direction is nearly perpendicular to the bedding plane, indicative of a predominantly sedimentary fabric for the section, the tightly grouped principal maximum (K max ) parallel to the fold axis suggests that the section was subject to an embryonic deformation at least since the Late Oligocene. The K max direction is most likely associated with the N-S strain caused by the India-Asian collision. During the intervals of 23.3-20.0 Ma and 16.5-14.0 Ma, the strain markedly increased as evidenced by more tightly grouped K max directions and K min largely distributed within a clear N-S girdle. These two intervals are accompanied by changes in sedimentary facies (higher energy conditions and doubled sedimentation rates), and are interpreted as the periods when the Tian Shan experienced significant uplift. A conceptual model is tentatively proposed to reconcile various timings for the Tian Shan uplift.

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Section: Interpretationsmentioning

confidence: 99%

Anisotropy of magnetic susceptibility of the Jingou River section: Implications for late Cenozoic uplift of the Tian Shan

Tang¹,

Huang²,

Dong³

et al. 2012

Geochem Geophys Geosyst

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“…To achieve this objective, we carried out a study of AMS, APWV and Fry strain analysis, because the combination of these techniques has proven to be very efficient to describe the microscale deformation of rock samples (e.g. Louis et al 2006; Burmeister et al 2009; Soto et al . 2009).…”

Section: Methodology and Samplingmentioning

confidence: 99%

“…The result is a better‐defined strain ellipse. In sandstones, strain within the bedding plane is assumed to be a proxy for layer‐parallel tectonic shortening, whereas strain tends to occur perpendicular to bedding for pre‐tectonic compaction (Burmeister et al 2009).…”

Section: Methodology and Samplingmentioning

confidence: 99%

Constraints on deformation mechanisms during folding provided by rock physical properties: a case study at Sheep Mountain anticline (Wyoming, USA)

Amrouch¹,

Robion²,

Callot³

et al. 2010

Geophysical Journal International

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S U M M A R YThe Sheep Mountain anticline (Wyoming, USA) is a well-exposed asymmetric, basementcored anticline that formed during the Laramide orogeny in the early Tertiary. In order to unravel the history of strain during folding, we carried out combined anisotropy of magnetic susceptibility (AMS), anisotropy of P-wave velocity (APWV) and Fry strain analyses. The results are compared to previously published stress-strain data from calcite twins at the microscopic scale and from fracture sets at the mesoscopic scale, and are used to discuss the kinematics and mechanics of forced folding. The results obtained in sandstone and carbonate lithologies demonstrate a good agreement between (1) the principal axes of the AMS and APWV tensors, (2) stress-strain tensors derived from calcite twins, (3) Fry strain axes and mesoscopic fracture sets. Furthermore, these tensors are coaxial with the main structural trends of the anticline. The differences between AMS and APWV fabrics on one hand, and the differential stress values of the forelimb and the backlimb on the other hand, emphasize how the macroscopic asymmetry of Sheep Mountain anticline affects the strain pattern at the microscopic scale. The data set presented in this paper offers a consistent mechanical scenario for the development of Sheep Mountain anticline.

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“…In most deformed environments, the directions of the AMS axes show a fair to good correlation with the directions of the principal (finite) strain axes (e.g., Borradaile, 1987Borradaile, , 1988Borradaile, , 1991Tarling and Hrouda, 1993;Borradaile and Henry, 1997;Par es et al, 1999;Latta and Anastasio, 2007;Soto et al, 2007;Mamtani and Sengupta, 2009;Hrouda et al, 2009;Burmeister et al, 2009;Hirt and Almqvist, 2012). No reliable correlation has been established between the magnitudes of the AMS axes and those of strain magnitudes (e.g., Par es and Van der Pluijm, 2004;Latta and Anastasio, 2007;Borradaile and Jackson, 2010) mainly because these relationships are complex, and may be governed by the percentage of the Fe and Mn-minerals in the rock (Rochette, 1988;Borradaile and Henry, 1997;Schmidt et al, 2006).…”

Section: Ams Of Rocks and Carbonatesmentioning

confidence: 99%

Distinctive diamagnetic fabrics in dolostones evolved at fault cores, the Dead Sea Transform

Braun

Weinberger

Eyal

et al. 2015

Journal of Structural Geology

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Comparison of Fry strain ellipse and AMS ellipsoid trends to tectonic fabric trends in very low-strain sandstone of the Appalachian fold–thrust belt

Cited by 40 publications

References 44 publications

Anisotropy of magnetic susceptibility of the Jingou River section: Implications for late Cenozoic uplift of the Tian Shan

Anisotropy of magnetic susceptibility of the Jingou River section: Implications for late Cenozoic uplift of the Tian Shan

Constraints on deformation mechanisms during folding provided by rock physical properties: a case study at Sheep Mountain anticline (Wyoming, USA)

Distinctive diamagnetic fabrics in dolostones evolved at fault cores, the Dead Sea Transform

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