Etude géomorphologie de la zone Plaine-Joux, Anterne, Pormenaz
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7/21/2019 Etude géomorphologie de la zone Plaine-Joux, Anterne, Pormenaz
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Frtour Bfzkj
N7 KLL
Ofrl`jksftk`jaë`arfpokh
UHTXDH AH@L@R]O@N@AKVXH
DH NF S@JH ]NFKJH-C@X_,
FJTHRJH, ]@RLHJFS\ Vuhns s`jt nhs pr`ghssus ër`skis í n‛`rkakjh dh nf l`rpo`n`akh fgtuhnnh dh ghtth z`jh.
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W`llfkrhKjtr`dugtk`j ............................................................................................................................................. 7
K. Aë`n`akh .......................................................................................................................................... 4
F. Nh lfsski grkstfnnkj hxthrjh dhs Fkauknnhs R`uahs ........................................................................ 4
B. Nhs thrrfkjs sëdklhjtfkrhs .......................................................................................................... 8
G. Thgt`jkquh ................................................................................................................................... 8
KK. Aë`l`rpo`n`akh.............................................................................................................................. 9
F. Whgthur ]`rlhjfz ....................................................................................................................... 9
B. Whgthur Ikz ................................................................................................................................... 9
G`jgnusk`j ............................................................................................................................................... ?
Bkbnk`arfpokh ........................................................................................................................................... ;
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Kjtr`dugtk`jNf z`jh ëtudkëh sh sktuh hj Irfjgh, dfjs nhs Fnphs du J`rd, sur nf g`llujh dh ]fssy (14, Ofuth-
Wfv`kh).
Nh shgthur g`jghrjë hst hjgfdrë pfr nh Dëshrt dh ]nftë fu J`rd-`uhst, nh g`n d‛Fjthrjh fu J`rd, Nf
]`kjth J`krh dh ]`rlhjfz fu Wud-`uhst ht pfr nf g`llujh dh Whrv`z fu Wud.
Ikaurh 6 3 Gfrth dh sktuftk`j. A``anh, rht`ugoh F. Bfzkj, 2==;
J`us s`llhs sur ujh z`jh `û n‛`j rhtr`uvh dhs thrrfkjs sëdklhjtfkrhs (G/C), dhs r`gohs du s`gnh
grkstfnnkj (A), dhs ëb`unks (Hb) ht dhs thrrfkjs o`uknnhrs (O). @j j`th nf prëshjgh d‛ujh ifknnh (- - -) quk
trfvhrsh nh shgthur.
Ikaurh 2 3 Gfrth aë`n`akquh sklpnkikëh du shgthur. A``anh, rht`ugoh F. Bfzkj, 2==;
Vuhns s`jt nhs pr`ghssus fyfjt kjdukt gh pfysfah ht c`uhjt-kns hjg`rh í n‛ohurh fgtuhnnh 0
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K. Aë`n`akhJ`us j`us sktu`js í gohvfn hjtrh nh lfsski grkstfnnkj hxthrjh `ggkdhjtfn dhs Fkauknnhs R`uahs, fu Wud-
hst du W`ufy ht nhs thrrfkjs sëdklhjtfkrhs dh nf jfpph dh gofrrkfah Ohnvëtkquh fu J`rd-`uhst du
rfvkj du W`ufy.
F.
Nh lfsski grkstfnnkj hxthrjh dhs Fkauknnhs R`uahs
Gh lfsski ifkt pfrtk du s`gnh ohrgyjkhj (lks hj pnfgh fprïs n‛frrãt dh n‛`r`aëjïsh ohrgyjkhjjh
phjdfjt n‛ïrh prklfkrh, kn y f hjvkr`js 8== Lf). G‛hst uj hjshlbnh dh arfjkths fyfjt subkt dh i`rths
prhssk`js (dh 6= === í 4= === bfr) ht dh ofuths thlpërfturhs (pnus dh 9==½G) n‛fyfjt lëtfl`rpoksë
hj ajhkss (rhg`jjfkssfbnh sur nh thrrfkj arâgh í nhur pftkjh vhrdâtrh) (gi. ikaurh 7).
]hu fprïs ghtth i`rlftk`j (í pfrtkr dh -78= Lf ht cusqu'í -768 Lf), du lfalf kjtruski s‛hst lks hj
pnfgh, gh quk, pfrt nf sukth, g`jstktuhrf pfr hxhlpnh nh lfsski du L`jt-Bnfjg.
Ght hjshlbnh dh r`gohs o`l`aïjhs grkstfnnkjhs, gfssfjths prëshjth dh j`lbrhushs irfgturhs ht s`jt
s`urgh d‛oydr`tohrlfnkslh (pfr hxhlpnh nhs tohrlhs dh Wfkjt-Ahrvfks-nhs-Bfkjs) `j y rhtr`uvh d`jg
dh j`lbrhux ikn`js lëtfnnkiïrhs (j`tfllhjt dh nf afnïjh, fnnkfah dh pn`lb ht d‛frahjt). G‛hstëafnhlhjt vrfk p`ur t`us nhs lfsskis grkstfnnkjs, d‛`û nh j`lbrh g`jskdërfbnh dh lkjhs hxpn`ktëhs
dhpuks nhs R`lfkjs, fkjsk quh n‛ëtfbnksshlhjt d‛ujh ëg`nh dhs Lkjhs í ]rfn`ajfj nf Yfj`ksh.
Fu gfrb`jkiïrh (-788 í -7== Lf) dh arfjds arfbhjs sh s`jt i`rlës í gfush du rhnâgohlhjt dhs i`rghs
dh g`lprhssk`j (ghnnhs-ní lãlh quk fvfkhjt hjtrfkjë nf i`rlftk`j dh nf gofkjh ohrgyjkhjjh), kns `jt
phrlks nf lksh hj pnfgh dh nfaujhs d`jt nhs rhsths s`jt pfrifkthlhjt vkskbnhs arâgh fux g`jan`lërfts
(gi. ikaurh 4) ht fux arïs quk s`jt nhs rësuntfts dh n‛ër`sk`j dhs r`gohs grkstfnnkjhs quk hjt`urfkhjt ghs
nfaujhs.
@j tr`uvh ëafnhlhjt dhs Gfrajhunhs (gi. ikaurh 8) fss`gkëhs í dhs fraknkths, tël`kjs d‛ujh lhr phu
pr`i`jdh dftfjt du Trkfs (-28= í -2== Lf) lfks fussk dh gkrgunftk`js oydr`tohrlfnhs.
Ikaurh 7 3 W`gnh grkstfnnkj (ajhkss). Gnkgoë F. Bfzkj, shpt. 2==;
Ikaurh 4 3 G`jan`lërft (j`lbrhux ihndspftos). Gnkgoë F. Bfzkj, shpt 2==;
Ikaurh 8 3 Gfrajhunhs. Gnkgoë F. Bfzkj, shpt 2==;
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B. Nhs thrrfkjs sëdklhjtfkrhs
Ghs thrrfkjs s`jt nh rësuntft d‛ujh kllhjsh jfpph dh gofrrkfah quk s‛ëthjd dh nf Wukssh, fux Frfvks ht
hjan`bh, hjtrh futrhs, nh Dëshrt dh ]nftë fkjsk quh nh lfsski dhs Ikz.
@j phut `bshrvhr ujh sërkh sëdklhjtfkrh dh pnus dh 6=== l d‛ëpfksshur quk dëlfrrh du Nkfs
kjiërkhur (2== Lf) ht sh thrlkjh pfr nhs bfrrhs dh gfngfkrh Xra`jkhj (Bfrrëlkhj - Fptkhj, dh 67= í
66= Lf) (gi. ikaurh 9). Ghs g`ugohs `jt uj phjdfah `rkhjtë J`rd-`uhst quk g`rrhsp`jd fu infjg Hst du
vfn phrgoë du Dëshrt dh ]nftë (dënklktë í s`j hxtrãlh Hst pfr nf p`kjth d‛Fjthrjh).
Gh s`jt nhs tël`kjs dh n‛fjgkhj `gëfj quk rhg`uvrfkt ghtth rëak`j dh -28= í -7= Lf.
F nf bfsh dh ghtth sërkh `j tr`uvh ujh g`ugoh dh lfrjhs dftfjt du Trkfs (-28= í -2== Lf).
Ikaurh 9 3 Nf sërkh sëdklhjtfkrh du lfsski dhs Ikz. Gnkgoë L. Akd`j, rht`ugoh F. Bfzkj
G.
Thgt`jkquh@j `bshrvh dhs trfghs dkrhgths dh nf thgt`jkquh, dhs ikn`js dh qufrtz, tël`kjs dkrhgts dh n‛`r`aëjïsh
fnpkjh (H`gïjh, dh -88 í -78 Lf) quk f hjtrfkjë nf surrhgtk`j du s`gnh grkstfnnkj, fkjsk quh dhs
pnksshlhjts quk sukvkrhjt.
Kn hj f rësuntë uj bfsgunhlhjt, sukvk d‛uj anksshlhjt dhs g`ugohs sëdklhjtfkrhs surpn`lbfjt ghnuk-gk
ht hj pfrtkh hjtrfkjëhs pfr nf jfpph gofrrkëh Ohnvëtkquh.
Nh rfvkj du W`ufy dënklkth nh g`jtfgt hjtrh nhs r`gohs sëdklhjtfkrhs ht nh s`gnh ajhksskquh. Wur nf
pfrtkh afugoh dh ghnuk-gk kn hst p`sskbnh dh dkstkjauhr nf « g`ugoh sfv`j µ g`jstktuëh dh lfrjhs du
Trkfs fyfjt phrlks nh anksshlhjt dh ghtth sërkh sëdklhjtfkrh (gi. ikaurh 1)
Ikaurh 1 3 N‛okst`krh thgt`jkquh dh ]`rlhjfz. Gnkgoë F.
Bfzkj, shpt 2==;
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KK. Aë`l`rpo`n`akhHj `bshrvfjt nh thrrfkj, `j j`th dh j`lbrhushs i`rlhs dkvhrshs ht vfrkëhs quk s`jt nh rësuntft
d‛ër`sk`js dkiiërhjtkhnnhs du thrrfkj fkjsk quh d‛ëvïjhlhjts aë`n`akquhs pnus rfpkdhs.
F. Whgthur ]`rlhjfz
@j y rhtr`uvh dh j`lbrhushs i`rlhs l`ut`jjëhs, dhs dfnnhs nksshs, fkjsk quh dhs nfgs dh
surgrhushlhjt anfgkfkrh (nfg dh ]`rlhjfz). Wh s`jt dhs strugturhs typkquhs dh n‛ër`sk`j anfgkfkrh quk
rhl`jth í nf dhrjkïrh anfgkftk`j kn y f hjvkr`j 6= === fjs. (gi. ikaurh ?)
Ikaurh ? 3 strugturhs l`ut`jjëhs ht dfnnhs nksshs typkquhs dh
n‛ër`sk`j anfgkfkrh fu jkvhfu du nfg dh ]`rlhjfz, dfjs nh i`jt
nf tãth j`krh dh ]`rlhjfz. Gnkgoë F. Bfzkj, shpt 2==;
B.
Whgthur Ikz
Ghtth z`jh hst pnus g`lpnhxh, pnuskhurs pr`ghssus ër`skis s`jt í n‛ŗuvrh.
D‛fb`rd, ujh g`jsëquhjgh dkrhgth dh nf i`jth du anfgkhr dh n‛Frvh.
Nf dëg`lprhssk`j dhs r`gohs quk, irfaknksëhs pfr nhs kjikntrftk`js d‛hfu, nhs dëi`rlftk`js thgt`jkquhs,
fkjsk quh nf aënkirfgtk`j, sh dëstfbknkshjt ht hjtrfkjhjt dhs ëb`unksftk`js (hj tël`kajhjt nhs
j`lbrhux tfbnkhrs d‛ëb`unks) (gi. ikaurh ;). G‛hst dh ní quh pr`vkhjt nh j`l dh Dër`go`kr p`ur ghtth
z`jh.
@j `bshrvh fussk nhs trfghs d‛hii`jdrhlhjts g`jsëquhjts dh pfr nf prëshjgh dh jkgohs
d‛frrfgohlhjts (nh Lfrthfu pfr hxhlpnh) fkjsk quh dh j`lbrhux bn`gs ht l`nnfrds (bn`gs rhg`uvhrt
pfr nh s`n). @j phut bkhj sõr gkthr n‛ëgr`unhlhjt dh 6186, 9=.6=9 l
7 d`jt `j phut v`kr nhs rhsths, s`us
i`rlhs dh ar`s bn`gs lfks fussk dh t`urs g`lpnïths quk `jt trfjsnftë ht quk s‛ëlkhtthjt (gi. ikaurh ;).Ghnuk dh 6416 ëafnhlhjt, quk g`jdukskt í nf grëftk`j du nfg dh Whrv`z (lfkjthjfjt dkspfru).
Hjsukth, t`uc`urs hj rfks`j (hj pfrtkh) du rhtrfkt du anfgkhr dh n‛Frvh, d‛klp`rtfjts l`uvhlhjts dh
thrrfkjs s`jt `bshrvfbnhs, `j v`kt quh nh thrrfkj j‛hst pfs stfbknksë arâgh í nf prëshjgh dh i`rãts dkths
« kvrhs µ (duh í n‛fppfrhjgh dh nhurs frbrhs quk jh tkhjjhjt pfs dr`kt).
Kns thjdhjt í g`lbnhr nh g`urs dh n‛Frvh quk flpnkikh gh anksshlhjt pfr uj poëj`lïjh dh sfphlhjt
(n‛Frvh r`jah ghtth lftkïrh j`uvhnnh quk nuk pfrvkhjt) gfr kn hst prks hj ëtfu hjtrh nhs thrrfkjs o`uknnhrs
ht gh anksshlhjt. (gi. ikaurh 6=)
Gh g`lbnhlhjt f dëcí arkaj`të ujh phtkth pfrtkh dh nf vfnnëh dh Wfnnfjgohs puksquh Whrv`z s‛y
tr`uvfkt kn y f quhnquhs lknnkhrs d‛fjjëhs ht ifkt lfkjthjfjt pfrtkh dh nf vfnnëh dh Gofl`jkx(fntktudkjfnhlhjt pfrnfjt) quk s‛ëtfjt cusqu‛f phu fvfjt nf n`gfnktë dh Gohddh (g`llujh dh ]fssy)
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d`jt nh j`l skajkikh d‛fknnhurs « gouth µ, prhuvh quh ghs poëj`lïjhs s`jt g`jjus dhpuks uj ghrtfkj
thlps.
Hjikj, `j `bshrvh ujh ër`sk`j dkiiërhjtkhnnh dfjs nh rfvkj du W`ufy.
Gh dhrjkhr hst hjtfknnë sur sf rkvh dr`kth g`jstktuëh dh r`gohs sëdklhjtfkrhs irkfbnhs (lfrjhs
trkfskquhs, gfngfkrhs dh dkiiërhjts âahs) fn`rs qu‛kn hst kjtfgt sur sf rkvh afugoh i`rlëh dh r`gohslëtfl`rpokquhs grkstfnnkjhs (ajhkss). (gi. ikaurh 1, `û n‛`j phut `bshrvhr quh sh s`jt nhs r`gohs
sëdklhjtfkrhs ht j`j nh s`gnh grkstfnnkj quk s`jt hjtflëh)
Ikaurh ; 3 Nhs rësuntfts dh n‛ër`sk`j, n‛ëb`unksftk`j. Gnkgoë F. Bfzkj, shpt 2==;
Ikaurh 6= 3 Nh Dër`go`kr, ujh kllhjsh z`jh dh anksshlhjt dh thrrfkj. Gnkgoë F. Bfzkj, shpt 2==;
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G`jgnusk`jNh shgthur ]`rlhjfz, Fjthrjh, ]nfkjh-C`ux hst nh nkhu dh dkiiërhjts pr`ghssus ër`skis g`jg`lktfjts ht
kjdukts pfr dhs pr`ghssus trïs dkiiërhjts.
D‛fb`rd ujh pfnë`-ër`sk`j anfgkfkrh fu jkvhfu dh nf ]`kjth J`krh dh ]`rlhjfz ht du nfg dh
]`rlhjfz.
Hjsukth uj poëj`lïjh d‛ër`sk`j dkiiërhjtkhnnh sur nh shgthur du rfvkj du W`ufy kjdukt pfr dhs
l`uvhlhjts thgt`jkquhs.
Hjikj Dhs pr`ghssus d‛ëb`unksftk`js, d‛ëb`unhlhjts ht dh anksshlhjts dh thrrfkj fu jkvhfu du
Dër`go`kr g`jsëquhjgh dkrhgt dh nf dkspfrktk`j dh n‛fjgkhj anfgkhr dh n‛Frvh fkjsk quh dhs pr`ghssus
dh aënkirfgtk`j, dh rfvkjhlhjt ht dh dkss`nutk`j.
G‛hst uj shgthur fux pfysfahs vfrkës, quk f bhfug`up ëv`nuë fu g`urs du thlps ht quk g`jtkjuh dh sh
trfjsi`rlhr.
G‛hst ujh prhuvh dkrhgth dh nf nutth hjtrh nf thgt`jkquh quk ënïvh dhs l`jtfajhs ht n‛ër`sk`j quk
rfb`th ghs dhrjkïrhs.
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Bkbnk`arfpokh
Ah`n-fnp. UHj nkajh\. L.Akd`j, 1 j`vhlbrh 2==? Ug`jsuntë nh 6 `gt`brh 2==;\. Dksp`jkbnh sur
ottp3//www.ah`n-fnp.g`l/gofbnfks/PnkhuxPskxt/ikz.otln
Qkekpëdkf. UHj nkajh\. Qkeklhdkf i`ujdftk`j, shpthlbrh 2==; Ug`jsuntë nh 6 `gt`brh 2==;\.
Dksp`jkbnh sur ottp3//ir.wkekphdkf.`ra/wkek/]fssyP%2?Ofuth-Wfv`kh%2;#IfktsPokst`rkquhs
Frvh rfjd`jjëh. UHj nkajh\. Cfgquhs Jkg`nh, Ug`jsuntë nh 6 `gt`brh 2==;\. Dksp`jkbnh sur
ottp3//frvh.rfjd`jjhhs.irhh.ir/pfahs/nPhii`jdrhlhjtPduPdhr`go`krpfa.otln
BRAL. UHj nkajh\. BRAL, 2==? Ug`jsuntë nh 7 `gt`brh 2==;\. Dksp`jkbnh sur
ottp3//kji`thrrh.bral.ir/vkhwhr/LfkjTknhI`rwfrd.d`
Fsthr . ]nfj dh ahstk`j 2=6=-2=6; dh nf rëshrvh jfturhnnh dh ]fssy. Hdkthur kjg`jju, iëvrkhr 2==;.
Whgtk`j F.2.6 Aë`n`akh, aë`l`rpo`n`akh, p77-71.