Geotectonic interpretation of measuremeuts of joint orientations in the Muskoka regio n of the Canadian ShieId

• Main Author: A. E. SCHEIDEGGEH
• Format: Article
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia (INGV) 1975-05-01
• Series: Annals of Geophysics
• Online Access: http://www.annalsofgeophysics.eu/index.php/annals/article/view/4908

, ,letail(',1 SU,"Py of joint orient.ations Wi!"; lIulIlp in tll{'
 ~ru~koka J'{·!_(ion of Cellt.ral Ontario (Cana,la). (Tsing- a tediqlW ,1,,"('1'(',1
 (·arlier. tlw prinC'i]Jal pr('sent.,lax W'oj{·('toni(' str('ss tt'aj"l'toriO'.~ In're ('Oll'
 strndl',1 for tlll' an'a. 'l'hl' followilll!: results wcre ohtain('lI:
 l) - 'l'hl' 1't'in('Ìpal reg-ionill stre!ses l'llll X· .. ~ illlOl E·". Thi~ ('otT(';;pon,l!
 to a fradure pattol'll whkh lit.s wilh the !rike of th" pdnripal W'o)!raphie
 featurl's of th(' rpgioll. illl'il{iinl!: UO striko of nl{' Kt. LawrO'n('I' valle,'.
 2) - 'l'hot'o is no cort'elali'lIl hetw"en th" pr('sent·,lay joint ~.vsklll allOl
 ol,lPr joillts liIlO'II with 1'Ol!:lllatik ot' qnartz in the area., ilJ(lÌl'aling that th"
 ori"ntation of thp strl'ss liel,1 has ('hang-O'II dnrilll!: I!:l'olol!:ÌI'al hi.~h)Jy.
 3) - 'l'llI't'e i~ no eot'J'{'lation ]wtween joilltill)! al1<l litholog-y. RI'CO'llt
 joint.s are ('T('n visihle ill allndal Illaterial.
 .J-) - 'l'h('re is a slllall anolllalon.~ area whidl 111llll ho olnl' to ;;Olll(' 10l'al
 i1'l"·g-ularity. ]t ('annot ho l'xplailH'1I ])j' litholog-y. 'l'hl' ('xiMelll'e of slwh
 :lllom:lli(·g Il)1I.~t hl' takl'll into arl'ount in n'l!:i"llal Run'(·,vs.