View in EDS

A review of phyllosilicate LPOs: insights from antigorite and chlorite.

Saved in:
Bibliographic Details
Title: A review of phyllosilicate LPOs: insights from antigorite and chlorite.
Authors: Kim, Dohyun1,2 (AUTHOR), Park, Munjae2 (AUTHOR) mpark@cbnu.ac.kr
Source: Geosciences Journal. Dec2025, Vol. 29 Issue 6, p995-1008. 14p.
Subject Terms: *Phyllosilicates, *Antigorite, *Microstructure, *Deformations (Mechanics), *Chlorite minerals, *Rock deformation, *Shear strain
Abstract: Phyllosilicates are silicate minerals with a sheet structure. Phyllosilicates including antigorite, chlorite, mica, and talc, commonly have a perfect (001) basal cleavage and intrinsically elastically anisotropic crystal structures. Studies of the lattice-preferred orientations (LPOs) of phyllosilicates have reported two characteristic types of [001] axis orientations: type-1 and type-2. Type-1 LPOs are characterized by [001] axes aligned subnormal to the foliation or the shear plane, while type-2 LPOs are characterized by [001] axes that form a girdle subnormal to the lineation or the shear direction. The type-1 LPO of phyllosilicates can be interpreted as the alignment of the basal cleavage subparallel to the shear plane. However, the mechanism responsible for the development of the type-2 LPO of phyllosilicates remains unclear. A thickening/narrowing simple shear (transtension) regime for phyllosilicates is consistent with the results of experiments on the development of a type-2 LPO of chlorite, which occurs following an increase in shear strain. However, the experimental chlorite samples were deformed under a lengthening/thinning methodology. The activation of antigorite slip systems may enable type-2 LPOs to develop under simple shear regimes, including thickening/narrowing (transtension) and lengthening/thinning shear. Microstructure studies of serpentinized peridotite suggest that phase boundary sliding between olivine and antigorite contributes to the development of type-2 LPOs in antigorite. However, there is a lack of experimental proof on the development of different LPOs in antigorite under simple shear conditions. Studies on the development of LPOs in chlorite lack detailed microstructural analyses focusing on slip systems and deformation mechanisms. Future studies to clarify the development mechanisms of LPOs in phyllosilicates should prioritize detailed investigations of simple shear regimes and slip systems. In addition, the effects of variations in modal compositions and shear strain on grain rotation mechanisms should be considered. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 189211067
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: A review of phyllosilicate LPOs: insights from antigorite and chlorite.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Kim%2C+Dohyun%22">Kim, Dohyun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Park%2C+Munjae%22">Park, Munjae</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> mpark@cbnu.ac.kr</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Geosciences+Journal%22">Geosciences Journal</searchLink>. Dec2025, Vol. 29 Issue 6, p995-1008. 14p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Phyllosilicates%22">Phyllosilicates</searchLink><br />*<searchLink fieldCode="DE" term="%22Antigorite%22">Antigorite</searchLink><br />*<searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br />*<searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Chlorite+minerals%22">Chlorite minerals</searchLink><br />*<searchLink fieldCode="DE" term="%22Rock+deformation%22">Rock deformation</searchLink><br />*<searchLink fieldCode="DE" term="%22Shear+strain%22">Shear strain</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Phyllosilicates are silicate minerals with a sheet structure. Phyllosilicates including antigorite, chlorite, mica, and talc, commonly have a perfect (001) basal cleavage and intrinsically elastically anisotropic crystal structures. Studies of the lattice-preferred orientations (LPOs) of phyllosilicates have reported two characteristic types of [001] axis orientations: type-1 and type-2. Type-1 LPOs are characterized by [001] axes aligned subnormal to the foliation or the shear plane, while type-2 LPOs are characterized by [001] axes that form a girdle subnormal to the lineation or the shear direction. The type-1 LPO of phyllosilicates can be interpreted as the alignment of the basal cleavage subparallel to the shear plane. However, the mechanism responsible for the development of the type-2 LPO of phyllosilicates remains unclear. A thickening/narrowing simple shear (transtension) regime for phyllosilicates is consistent with the results of experiments on the development of a type-2 LPO of chlorite, which occurs following an increase in shear strain. However, the experimental chlorite samples were deformed under a lengthening/thinning methodology. The activation of antigorite slip systems may enable type-2 LPOs to develop under simple shear regimes, including thickening/narrowing (transtension) and lengthening/thinning shear. Microstructure studies of serpentinized peridotite suggest that phase boundary sliding between olivine and antigorite contributes to the development of type-2 LPOs in antigorite. However, there is a lack of experimental proof on the development of different LPOs in antigorite under simple shear conditions. Studies on the development of LPOs in chlorite lack detailed microstructural analyses focusing on slip systems and deformation mechanisms. Future studies to clarify the development mechanisms of LPOs in phyllosilicates should prioritize detailed investigations of simple shear regimes and slip systems. In addition, the effects of variations in modal compositions and shear strain on grain rotation mechanisms should be considered. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=189211067
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s12303-025-00063-y
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 995
    Subjects:
      – SubjectFull: Phyllosilicates
        Type: general
      – SubjectFull: Antigorite
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Chlorite minerals
        Type: general
      – SubjectFull: Rock deformation
        Type: general
      – SubjectFull: Shear strain
        Type: general
    Titles:
      – TitleFull: A review of phyllosilicate LPOs: insights from antigorite and chlorite.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Kim, Dohyun
      – PersonEntity:
          Name:
            NameFull: Park, Munjae
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 12264806
          Numbering:
            – Type: volume
              Value: 29
            – Type: issue
              Value: 6
          Titles:
            – TitleFull: Geosciences Journal
              Type: main
ResultId 1