Article
Reference
Sur quelques minerais du gisement de Praz-Jean (val d'Hérens): note n°3
CHENEVAL, René
CHENEVAL, René. Sur quelques minerais du gisement de Praz-Jean (val d'Hérens): note n°3.
Compte rendu des séances de la Société de physique et d'histoire naturelle de Genève, 1944, vol. 61, no. 3, p. 283-285
DOI : 10.5169/SEALS-742764
Available at:
http://archive-ouverte.unige.ch/unige:151477
Disclaimer: layout of this document may differ from the published version.
1 / 1
6e$1&( '8 'e&(0%5(
5HQp &KHQHYDO ²ª6XU JXHLWXHV UDPHUDLV GD JWVHUDHUDL GH L9D]
HDUD
)DI
GIHUHUDVM 9RLH UDL6WLXDvWRUD
/H JLVHPHQW GH 3UD]-HDQ HVW VLWXp VXU OHV GHX[ YHUVDQWV GX 9DO G+pUHQV GH SDUW HW GDXWUH GH OD ULYLqUH %RUJQH SUqV GX KDPHDX GH 3UD]-HDQ HQWUH 9H[ HW (YROqQH &H JLVHPHQW FRPSUHQG OD PLQH GH /D %DUPD VXU OD ULYH GURLWH HW OD PLQH
GH &RPWHVVH VXU OD ULYH JDXFKH GH OD %RUJQH )HXLOOH GH OD FDUWH 6LHJIULHG 1RV pWXGHV RQW SRUWp SULQFLSDOHPHQW VXU OD PLQH GH &RPWHVVH
*pRORJLH
/H JvWH GH &RPWHVVH GX W\SH IGRQLHQ HVW IRUPp HVVHQWLHOOH PHQW GH JDOpUDH DUJHUDLLqUH GH LGHUDGH HW GXQH JDQJXH TXDUW]HXVH
*pRORJLTXHPHQW
LO
VH WURXYH GDQV OD ]RQH LQIpULHXUH GHV VFKLVWHV GH &DVDQQD QDSSH GX *UDQG6DLQW%HUQDUG GpFULWH SULQFLSDOHPHQW SDU 'LDV HW :HJPDQQ /HV URFKHV HQFDLV VDQW OH JLVHPHQW VRQW VXUWRXW GHV JQHLVV FKORULWHX[ HW VpULFLWLTXHVj WH[WXUH OHQWLFXODLUH :DIIHOJQHLVV 'DQV FHV JQHLVV VRQW LQWHUFDOpV GHV VFKLVWHV TXDUW]LWRVpULFLWLTXHV HW GHV SK\OOLWHV DLQVL TXH GHV OHQWLOOHV GDPSKLEROLWHV HW GH JQHLVV FKORULWHX[ HW SUDVLQLWLTXHV &HV JQHLVV RIIUHQW XQH GLUHFWLRQ JpQpUDOH (:
DYHF XQ SORQJHPHQW GHQYLURQ 6
'DQV OD SDUWLH VXSpULHXUH HW DX 1: GH OD PLQH FHWWH GLUHF
WLRQ
DFFXVH XQ EUXVTXH FKDQJHPHQW HW SDVVH GHO(:
DX 1(6: DYHF GHV SORQJHPHQWV VXEYHUWLFDX[WDQW{W
6WDQW{W
13OXV DX 1: HQFRUH RQ REVqUYH GHV EDQGHV GH JQHLVV FKORULWHX[
HW SUDVLQLWLTXHV GRQW
ORULHQWDWLRQ
HVW 1:6( DYHF SORQJH PHQWV 6 &HV YDULDWLRQV EUXVTXHV GH GLUHFWLRQ WpPRLJQHQW GH IRUWHV GLVORFDWLRQV HWLO
HVW SUREDEOH TXH GHV IDLOOHV FRPSOH[HV VRQW j ORULJLQH GH FHV SHUWXUEDWLRQV 'DQV OD SDUWLH PpGLDQHL
$ 'LDV &RUDULqLWKRUD j OHWDGH SpWURJUDSKLTXH GHV VFKLVWHV GH&DVDQQD GD )DL GbHUHUHV I)DODLV ª6XLVVH- HW GH ADHOMXHV JvWHV \XL V\
UDWWDFKHQW 7KqVH *HQqYH
( :HJPDQQ =DU *HRORJLH GHU ª6I HUQKDUGGHFKH LP )DL GLwH
UHQV 7)DLV- 7KqVH 1HXFKkWHO
6e$1&( '8 'e&(0%5(
GX JLVHPHQW OHV JQHLVV RIIUHQW DXVVL XQ FKDQJHPHQW QRWDEOH LOV VLQIOpFKLVVHQW HW GHYLHQQHQW SUHVTXH KRUL]RQWDX[
/D PLQpUDOLVDWLRQ VH SUpVHQWH HQ JpQpUDO VRXV IRUPH GH ILORQVFRXFKHV TXL SHXYHQW WRXWHIRLV GHYHQLU OpJqUHPHQW REOLTXHV SDU UDSSRUW j OD GLUHFWLRQ GHV JQHLVV FRPPH RQ OH UHPDUTXH GDQV OD SDUWLH VXSpULHXUH GH OD PLQH 2Q SHXW VXLYUH VXUOD SDURL URFKHXVH OHV DIIOHXUHPHQWV GH GHX[ ILORQV SULQFLSDX[
GpVLJQpV VXU OHV DQFLHQV GRFXPHQWV SDU OHV OHWWUHV $ HW %
D\LRLIDLLRQ
/HV WUDYDX[ HIIHFWXpV VXU OH JLVHPHQW VpWDJHQW GHSXLV P MXVTXj P GDOWLWXGH /HV GLIIpUHQWHV JDOHULHV VRQW VLWXpHV OH ORQJ GXQH SDURL URFKHXVH DEUXSWH FRPSOqWHPHQW GpQXGpH /HV DQFLHQV WUDYDX[ FRPSUHQQHQW GHX[ ]RQHV GLV WLQFWHV OD ]RQH PpGLDQH DYHF OHV JDOHULHV GDQV OH ILORQ $ HW OHV JDOHULHV HW GDQV OH ILORQ % FHWWH SDUWLH GH OD PLQH OD SOXV LPSRUWDQWH GHV DQFLHQV WUDYDX[ D pWp
OREMHW
GXQH H[SORLWDWLRQ WUqV SRXVVpH HW OH PLQHUDL HQ D pWp SUHVTXH FRPSOqWHPHQWH[WUDLW
/HV JDOHULHV VXLYDQW OD GLUHFWLRQ
GX ILORQ RQWDWWHLQW
GHV SURIRQGHXUV GLYHUVHV DOODQWMXVTXj P
/D ]RQH VDSpULHDUH FRPSUHQDQW OHV JDOHULHV HW GDQV OH ILORQ $ HVW SOXV UpFHQWH OHV
WUDYDX[
RQW GpEXWpGDQV FHWWH ]RQH HQ ORUV GH OD UHSULVH GHV WUDYDX[ HQ FHVW FHWWH SDUWLH TXL D pWp UHPLVH HQ pWDW HW j QRXYHDX H[SORLWpH
0LQHUDL
/H PLQHUDL SUpVHQWH SOXVLHXUV W\SHV
8Q SUHPLHU W\SH GH PLQHUDL PULH j JUDLQ ILQ GH FRXOHXU EUXQH SOXV RX PRLQV IRQFpH IRUPp GH JDLqQH HW GH qLHQGH FHV GHX[ PLQpUDX[ VH SUpVHQWHQW VRLW HQ PrPHV SURSRU WLRQV VRLW HQ RIIUDQW OD SUpGRPLQDQFH GH OD EOHQGH /H
oUQDUp] V\ SUpVHQWH VRXV IRUPH GH JUDLQV DUURQGLV
8Q GHX[LqPH W\SH GH PLQHUDL PULH j JUDLQ WUqV ILQ IRUPp GH :HQGH HW GH JDqQH HQ SURSRUWLRQV GLYHUVHV OH PLQHUDL RIIUH XQH WHLQWH JULV DFLHU SOXV RX PRLQV YLRODFp HW FRQWLHQW pJDOHPHQW GHV JUDLQV DQJXOHX[ RX DUURQGLV GH oDDUL]
6e$1&( '8 'e&(0%5(
8QH JDLqZH FRPSDFWH j JUDLQ PR\HQ RX ILQ SUHVTXH WRX MRXUV DFFRPSDJQpH GH :HUHLH HQ TXDQWLWp PRLQV LPSRU WDQWH HW IRUPDQW GHV QRGXOHV GDQV OD JDIqUHH
8QH JDIrUDH PDVVLHF HQ WUqV JURV FULVWDX[ QH FRQWHQDQW SDV GH :HUHGH (OOH HVW UDUH HW QD pWp UHQFRQWUpH TXHQ XQ RX GHX[ SRLQWV
8QH JDWHL]H PDVVLHH DFFRPSDJQpH GH :HPWH HQ JURV FULV WDX[ pJDOHPHQW OHV GHX[ PLQHUDLV QH VRQW SDV LQWHUSpQp WUqV HW OHXU VXUIDFH GH VpSDUDWLRQ HVW QHWWH &HWWH YDULpWp HVW pJDOHPHQW
IRUW
UDUH 8QH :HUHGH PDVVLHH HQ JURV FULVWDX[ QH FRQWHQDQW SDV GH JDLqZH (OOH QD pWp UHQFRQWUpH TXHQ XQ SRLQW
UHZHXUV
P
©UJHUD&1RXV DYRQV GRVp OH SRPq HW
ODUJPL
GH FHV PLQHUDLV HQXWLOL
VDQW OD PpWKRGH VXLYDQWH
8QH SULVH GH J GH PLQHUDL EUR\p HVW DGGLWLRQQpH GH J GH FDUERQDWH GH VRXGH J GH ERUD[ HW J GH FUqPH GH WDUWUH
OH
WRXW
HVW SODFp GDQV XQ FUHXVHW HQ WHUUH UpIUDFWDLUH HW UHFRX YHUW GH J GH FDUERQDWH GH VRXGH HW J GH ERUD[ 2Q SORQJH XQH ODPH GH IHU GDQV OH FUHXVHW HW RQ FKDXIIH MXVTXj UpGXFWLRQ FRPSOqWH HW IXVLRQ WUDQTXLOOH,O
VH IRUPH XQ FXORW GH 3E TXL HVW QHWWR\p HW SHVp &H FXORW GH 3E TXL FRQWLHQWWRXW
ODUJHQW GX PLQHUDL HVW HQVXLWH FRXSHOOp &HWWH PpWKRGH VLPSOH HW UDSLGH GRQQH GHV FKLIIUHV XQ SHX IDLEOHV HQ FH TXL FRQFHUQH OD WHQHXU HQ 3E 1RXV DYRQV REWHQX OHV UpVXOWDWV VXLYDQWV(FKDQWLOORQ PR\HQ GX PLQHUDL GH &RPWHVVH
7HQHXU HQ 3E
7HQHXU HQ $J NJ SDU WRQQH
(FKDQWLOORQ GH PLQHUDL GX W\SH
7HQHXU HQ 3E
7HQHXU HQ $J NJ SDU WRQQH
1RXV DYRQV H[DPLQp VRXV OH PLFURVFRSH GH QRPEUHXVHV VHFWLRQV SROLHV GX PLQHUDL GH &RPWHVVH FHWWH pWXGH QRXV D SHUPLV GH PHWWUH HQ pYLGHQFH OHV VWUXFWXUHV SDUWLFXOLqUHV GH FH PLQHUDL HW GLGHQWLILHU j F{Wp GH OD JDIsZH HW GH OD 0HUHGH GLIIp UHQWV VXOIRVHOV GRQW OD WHWHDpGULWH TXL VHURQW GpFULWV GDQV XQH
QRWH XOWpULHXUH
Ä Ä
$DqRUDvRLUH GH $ILUDpUDIRJLH