{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,11,19]],"date-time":"2024-11-19T16:08:13Z","timestamp":1732032493114},"reference-count":22,"publisher":"Cambridge University Press (CUP)","issue":"3","license":[{"start":{"date-parts":[[2024,1,1]],"date-time":"2024-01-01T00:00:00Z","timestamp":1704067200000},"content-version":"unspecified","delay-in-days":6058,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clays and clay miner."],"published-print":{"date-parts":[[2007,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Naturally deformed biotite in contact-metamorphosed slates affected by a shear zone of the Southern Iberian Massif near Ja\u00e9n (SE Spain) were studied by X-ray diffraction, optical microscopy, scanning electron microscopy, electron probe microanalysis and high-resolution transmission and analytical electron microscopy. Biotite is found in the contact metamorphism aureole produced by the intrusion of a granodioritic stock, but shear strain caused its deformation. The southern part of the shear band is strongly deformed, containing thick clay gouge zones. The northern part is less deformed and develops weaker planar-linear fabrics. X-ray diffraction data reveal the predominance of the 2<jats:italic>M<\/jats:italic><jats:sub>1<\/jats:sub> biotite in the undeformed samples whereas the 1<jats:italic>M<\/jats:italic> polytype is predominant in the sheared samples. Chemical data and electron images of the biotite from unsheared slates do not show the presence of intercalated phases. This biotite is almost defect-free and electron diffraction patterns have sharp reflections indicating a two-layer polytype (probably 2<jats:italic>M<\/jats:italic><jats:sub>1<\/jats:sub>). Back-scattered electron images from the deformed biotite in the moderate deformation part of the shear zone do not reveal intergrown minerals, but the electron microprobe analyses show some Fe- and Mg-enriched compositions. Transmission electron microscopy indicates that disordered polytype packets are predominant (probably 1<jats:italic>M<\/jats:italic><jats:sub>d<\/jats:sub>). Their electron diffraction patterns have diffuse streaking along <jats:italic>c<\/jats:italic>*. These packets have high dislocation densities, microcavities with \u223c5 \u00c5 latticefringe regions (probably brucite-like sheets) and interlayering of chlorite-berthierine. Kaolinized biotite can be observed in the clay gouges from the strongly deformed south part of the shear zone. The degree of streaking, as an indication of the intensity of deformation, revealed that the disordered polytype packets are more deformed than the two-layer polytype packets. The microcavities of the disordered polytype packets could act as potential channels for transport of fluids during the shearing stage and serve as sites for chloritization of biotite, producing chlorite-berthierine domains within biotite. Berthierine is an intermediate metastable phase replaced by chlorite with along-layer transitions.<\/jats:p>","DOI":"10.1346\/ccmn.2007.0550305","type":"journal-article","created":{"date-parts":[[2007,7,29]],"date-time":"2007-07-29T23:15:16Z","timestamp":1185750916000},"page":"284-294","source":"Crossref","is-referenced-by-count":6,"title":["Deformation-promoted defects and retrograde chloritization of biotite in slates from a shear zone, Southern Iberian Massif, SE Spain"],"prefix":"10.1017","volume":"55","author":[{"given":"Juan","family":"Jim\u00e9nez-Mill\u00e1n","sequence":"first","affiliation":[]},{"given":"Mercedes","family":"V\u00e1zquez","sequence":"additional","affiliation":[]},{"given":"Nicol\u00e1s","family":"Velilla","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2024,1,1]]},"reference":[{"key":"S0009860400034042_bib4","doi-asserted-by":"publisher","DOI":"10.1111\/j.1525-1314.1989.tb00607.x"},{"key":"S0009860400034042_bib11","doi-asserted-by":"publisher","DOI":"10.1144\/0016-764900-206"},{"key":"S0009860400034042_bib3","doi-asserted-by":"publisher","DOI":"10.1016\/0040-1951(81)90014-7"},{"key":"S0009860400034042_bib15","doi-asserted-by":"publisher","DOI":"10.1007\/s00710-002-0236-x"},{"key":"S0009860400034042_bib1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00306511"},{"key":"S0009860400034042_bib10","doi-asserted-by":"publisher","DOI":"10.1029\/JB095iB12p19257"},{"key":"S0009860400034042_bib13","first-page":"162","article-title":"Biotite chloritization by interlayer brucitization, as seen by High-Resolution Transmission Electron-Microscopy","volume":"61","author":"Olives","year":"(1983)","journal-title":"Fortschritte der Mineralogie"},{"key":"S0009860400034042_bib19","doi-asserted-by":"publisher","DOI":"10.1016\/S0040-1951(00)00262-6"},{"key":"S0009860400034042_bib16","doi-asserted-by":"publisher","DOI":"10.1016\/S0040-1951(98)00013-4"},{"key":"S0009860400034042_bib8","first-page":"142","volume-title":"Abstract Book of Euroclay 2003","author":"Jim\u00e9nez-Mill\u00e1n","year":"(2003)"},{"key":"S0009860400034042_bib12","doi-asserted-by":"publisher","DOI":"10.1029\/1999JB900074"},{"key":"S0009860400034042_bib2","first-page":"1","volume-title":"Crystal Structures of Clay Minerals and their X-ray Identification","author":"Bailey","year":"(1980)"},{"key":"S0009860400034042_bib9","doi-asserted-by":"publisher","DOI":"10.2138\/am-2000-8-913"},{"key":"S0009860400034042_bib18","first-page":"53","article-title":"From the Cadomian orogenesis to the Early Palaeozoic Variscan rifting in Southwest Iberia","volume":"30","author":"Simancas","year":"(2004)","journal-title":"Journal of Iberian Geology"},{"key":"S0009860400034042_bib14","first-page":"754","article-title":"Interlayering and interlayer slip in biotite as seen by HRTEM","volume":"68","author":"Olives","year":"(1983)","journal-title":"American Mineralogist"},{"key":"S0009860400034042_bib17","doi-asserted-by":"publisher","DOI":"10.1127\/ejm\/5\/2\/0245"},{"key":"S0009860400034042_bib6","doi-asserted-by":"publisher","DOI":"10.1515\/9781501508820-014"},{"key":"S0009860400034042_bib21","first-page":"1160","article-title":"A TEM study of the biotite chlorite reaction and comparison with petrologic observations","volume":"68","author":"Veblen","year":"(1983)","journal-title":"American Mineralogist"},{"key":"S0009860400034042_bib7","first-page":"1195","article-title":"Muscovite-biotite interface studied by electron microscopy","volume":"67","author":"Iijima","year":"(1982)","journal-title":"American Mineralogist"},{"key":"S0009860400034042_bib20","doi-asserted-by":"publisher","DOI":"10.1180\/minmag.1956.031.234.03"},{"key":"S0009860400034042_bib5","doi-asserted-by":"publisher","DOI":"10.1016\/0191-8141(93)90157-6"},{"key":"S0009860400034042_bib22","doi-asserted-by":"publisher","DOI":"10.1007\/s004100050192"}],"container-title":["Clays and Clay Minerals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0009860400034042","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,3,11]],"date-time":"2024-03-11T10:41:02Z","timestamp":1710153662000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0009860400034042\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,6]]},"references-count":22,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2007,6]]}},"alternative-id":["S0009860400034042"],"URL":"https:\/\/doi.org\/10.1346\/ccmn.2007.0550305","relation":{},"ISSN":["0009-8604","1552-8367"],"issn-type":[{"value":"0009-8604","type":"print"},{"value":"1552-8367","type":"electronic"}],"subject":[],"published":{"date-parts":[[2007,6]]}}}