The sliding-scale Mohr diagram

Passchier, Cees W.

doi:10.1016/0040-1951(93)90325-e

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…Also, of immediate practical value, the different circles in a set will be closer to the same size and so easier to portray on the same diagram. (A similar situation, concerning the depiction of a set of Mohr circles on one figure, is discussed by PASSCHIER, 1993). This procedure has been followed in the present case.…”

Section: The Bc87 Magnetotelluric Datamentioning

confidence: 79%

“…Mohr circles, commonly used in the analysis of mechanical stress and strain (see, for example, the recent paper by PASSCHIER, 1993), may be used to examine the three-dimensional nature of magnetotelluric (MT) data, and their distortion. This application was initially introduced in LILLEY (1976), and developed further in LILLEY (1993); the latter paper was in response to increased interest in the interpretation of complicated magnetotelluric data.…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensionality of the BC87 Magnetotelluric Data Set Studied Using Mohr Circles.

Lilley

1993

J. geomagn. geoelec

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The BC87 magnetotelluric data are examined as Mohr circles. Examples are discussed which show two-dimensionality and three-dimensionality in the recorded data; there are only occasional instances of one-dimensionality, which are not consistent over wide frequency bands. Strong anisotropy and skew are common features of the impedance tensors, and from the Mohr circles it is clear that at some sites, the computed magnetotelluric phase will go outside the 0 --> 90° range of the first quadrant.

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Section: The Bc87 Magnetotelluric Datamentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Three-Dimensionality of the BC87 Magnetotelluric Data Set Studied Using Mohr Circles.

Lilley

1993

J. geomagn. geoelec

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“…Therefore, in the Variable‐origin Mohr diagram, it is possible to show a range of deformation parameters in a simple diagram. A similar approach was proposed by Passchier (1993) to visualize progressive deformation or deformation paths.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Deformed Vein Sets as a Record of Synmetamorphic Volume Change: Quantifying Solution Mass Transfer in Subduction‐Type Metasediments of the Del Puerto Canyon Region, Franciscan Belt, USA

Soejima

Wallis

2022

JGR Solid Earth

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Determining the pre-deformation geometry of a geological terrane is one of the main goals of field-based structural geology. Such reconstructions require knowledge of all three components of finite deformation: strain, rotation, and volume change. Establishing methods for strain analysis applicable to rocks was one of the foundations of quantitative structural geology starting in the 1960s (e.g., see summary in Ramsay, 1967). Methods for estimating the rotational component have also been developed (e.g.

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“…A similar approach was proposed by Passchier (1993) to visualise progressive deformation or deformation paths. The construction procedure for the Variable-origin Mohr diagram is as follows.…”

Section: New Mohr Diagram For Analyzing Field Datamentioning

confidence: 99%

Deformed vein sets as a record of synmetamorphic volume change: quantifying solution mass transfer in subduction-type metasediments of the Del Puerto Canyon region, Franciscan Belt, USA

Soejima

Wallis

2022

Preprint

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The volume change component of deformation is often ignored or assumed to be zero in tectonic studies of metamorphic belts. However, when estimating original geometries of deformed regions, volume change is just as important as the other two components of deformation, finite strain and rotation. Major permanent volume change in metamorphic rocks is accomplished by solution transfer facilitated by flow of H 2 O-rich fluids. Therefore, estimates of volume change can be combined with solubilities to estimate volumes of fluid flow. Previously applied methods for estimating rock volume change are based on estimates of absolute stretch, or changes in whole-rock chemical compositions. Estimates based on these approaches give large discrepancies even when applied to the same region. In this study, we develop a largely unexplored method for estimating volume change using the direction and deformation type of deformed mineral veins. The assumptions in this method are few and appropriate uncertainties can be estimated. Application of the new method to the metagreywacke in the Del Puerto Canyon of the Franciscan belt constrains the syn-metamorphic volume change to be greater than 7%, contrasting with previous proposals for large volume-loss in the same region. The results of previous studies can be modified taking into account grain rigid body rotation and grain boundary sliding. The final result of our approach yields a volume change of 7-21% vol.% and implies large amounts of water-rich fluid must have passed through the rock.Hosted file essoar.10510360.1.docx available at https://authorea.com/users/523707/articles/595298deformed-vein-sets-as-a-record-of-synmetamorphic-volume-change-quantifying-solutionmass-transfer-in-subduction-type-metasediments-of-the-del-puerto-canyon-regionfranciscan-belt-usa Deformed vein sets as a record of synmetamorphic volume change: quantifying solution mass transfer in subduction-type metasediments of the Del Puerto Canyon region, Franciscan Belt, USA

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The sliding-scale Mohr diagram

Cited by 6 publications

References 17 publications

Three-Dimensionality of the BC87 Magnetotelluric Data Set Studied Using Mohr Circles.

Three-Dimensionality of the BC87 Magnetotelluric Data Set Studied Using Mohr Circles.

Deformed Vein Sets as a Record of Synmetamorphic Volume Change: Quantifying Solution Mass Transfer in Subduction‐Type Metasediments of the Del Puerto Canyon Region, Franciscan Belt, USA

Deformed vein sets as a record of synmetamorphic volume change: quantifying solution mass transfer in subduction-type metasediments of the Del Puerto Canyon region, Franciscan Belt, USA

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