Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F19%3A00521627" target="_blank" >RIV/67985530:_____/19:00521627 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/19:10409251

Result on the web

<a href="https://www.nature.com/articles/s41598-019-53794-y" target="_blank" >https://www.nature.com/articles/s41598-019-53794-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-019-53794-y" target="_blank" >10.1038/s41598-019-53794-y</a>

Result language

angličtina

Original language name

Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble

Original language description

Anisotropy of magnetic susceptibility (AMS) is regularly applied as a tool to infer structural analysis of deformation and flow in rocks, particularly, with low anisotropy. AMS integrates the magnetic signature of crystallographic and shape preferred orientation of all mineral grains present in the rock microstructure. Those preferred orientations result from multiple processes affecting the rock during its evolution, therefore the desirable AMS-strain relationship is not straightforward. Here we show that due to localization of deformation, AMS is indirectly dependent on the magnitude and character of deformation. In order to decipher the AMS-strain relationship, AMS studies should be accompanied by microstructural analyses combined with numerical modelling of magnetic fabric. A small-scale shear zone produced by single deformation event was studied. The resultant AMS fabric is inverse due to the presence of Fe-dolomite and controlled by calcite and dolomite crystallographic preferred orientations. The localized deformation resulted in the angular deviation between macroscopic and magnetic fabric in the shear zone, systematically increasing with increasing strain. This is a result of the presence of microstructural subfabrics of coarse porphyroclasts and fine-grained recrystallized matrix produced by localization.The localization of deformation is a multiscale and widespread process that should be considered whenever interpreting AMS in deformed rocks and regions.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GJ16-25486Y" target="_blank" >GJ16-25486Y: How does AMS reflect the microstructure? Natural and experiment shear zones.</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

17483

UT code for WoS article

000498519800001

EID of the result in the Scopus database

2-s2.0-85075546630