Previous Page  89 / 352 Next Page
Information
Show Menu
Previous Page 89 / 352 Next Page
Page Background

4. THE ECLOGITE FACIES GNEISSES

73

$OEHUW HW DO -RXUQDO RI ,EHULDQ *HRORJ\

HUHG WKH ¿UVW WUXH 9DULVFDQ GHIRUPDWLRQ UHFRUGHG LQ WKH

EHOW $UHQDV

HW DO

0DUWtQH] &DWDOiQ

HW DO

$EDWL

HW DO

'tH] )HUQiQGH]

HW DO

7KH +3 +7 XQLWV DUH FRQVWLWXWHG E\ SDUDJQHLVVHV PD

¿F DQG XOWUDPD¿F URFNV ZLWK VRPH PLQRU IHOVLF ERGLHV

9RJHO

*LUDUGHDX

HW DO

*LO ,EDUJXFKL

HW DO

7KH PD¿F URFNV DSSHDU DV GLIIHUHQW W\SHV RI HF

ORJLWHV DQG &S[ *UW JUDQXOLWHV S\ULJDUQLWHV DQG DV WKHLU

UHWURJUHVVLYH SURGXFWV ZKLFK LQFOXGH PLJPDWLWLF DPSKL

EROLWLF JQHLVVHV DPSKLEROLWHV DQG VFDUFH JUHHQVFKLVWV

*DEEURV RFFXU LQ VHYHUDO VWDJHV RI WUDQVIRUPDWLRQ IURP

URFNV ZLWKRXW DQ\ HYLGHQFHV RI PHWDPRUSKLVP WR FRUR

QLWLF PHWDJDEEURV KLJK 3 JUDQXOLWHV DQG DPSKLEROLWHV

$UHQDV DQG 0DUWtQH] &DWDOiQ

,Q WKH XSSHU XQLWV

RI WKH &DER 2UWHJDO &RPSOH[ ERWK ,3 XSSHU XQLWV DQG

+3 +7 XQLWV DUH UHSUHVHQWHG 7KH ,3 XSSHU XQLWV DUH RQO\

UHSUHVHQWHG E\ DPSKLEROLWH IDFLHV JQHLVVHV WKH &DUL

xR *QHLVVHV 7KH +3 +7 XQLWV LQFOXGH JUDQXOLWH IDFLHV

JQHLVVHV &KLPSDUUD *QHLVVHV DQG WKH GHHSHVW HFORJLWH

IDFLHV JQHLVVHV GHVFULEHG LQ WKLV SDSHU %DQGHG *QHLVVHV

)LJ 8 3E ]LUFRQ GDWLQJ RI WKH ZHOO SUHVHUYHG JDE

EURV HFORJLWHV DQG &S[ *UW JUDQXOLWHV LQGLFDWHV DQ DJH

IRU WKH PD¿F SURWROLWKV LQ WKH UDQJH RI

0D ZLWK

D +3 +7 PHWDPRUSKLF HYHQW UDQJLQJ EHWZHHQ

0D 6DQWRV =DOGXHJXL

HW DO

2UGyxH] &DVDGR

HW

DO

)HUQiQGH] 6XiUH]

HW DO

7KH VXEVHTXHQW

GHFRPSUHVVLRQ RI WKH +3 +7 XQLWV ZDV YHU\ IDVW DFFRUG

LQJ WR RWKHU 8 3E DJHV REWDLQHG LQ OHXFRVRPHV GHYHORSHG

GXULQJ PLJPDWL]DWLRQ RI WKH PD¿F JUDQXOLWHV ZKLFK DUH

DOPRVW LQGLVWLQJXLVKDEOH IURP WKH KLJK 3 HYHQW DQG UDQJH

EHWZHHQ

0D )HUQiQGH] 6XiUH]

HW DO

'XULQJ WKHLU H[KXPDWLRQ WKH +3 +7 XQLWV ZHUH DIIHFWHG

E\ LQWHQVH VKHDULQJ WKDW JHQHUDWHG D SHUYDVLYH P\ORQLWLF

IDEULF ZLWK UHJLRQDO GLVWULEXWLRQ IROORZHG E\ WKH GHYHO

RSPHQW RI ODUJH UHFXPEHQW IROGV DQG WKUXVWV 0DUFRV

HW

DO

ÈEDORV

HW DO

3XHOOHV

HW DO

3 7 FRQGLWLRQV RI WKH HFORJLWH IDFLHV PHWDPRUSKLVP GH

YHORSHG LQ WKH +3 +7 XQLWV ZHUH HVWLPDWHG DW

ƒ&

DQG NEDU XVLQJ FODVVLFDO WKHUPREDURPHWULF WHFKQLTXHV

RQ WKH PLQHUDO DVVHPEODJHV IURP WKH PDLQ OD\HU RI HF

ORJLWHV )LJ LQ WKH &DER 2UWHJDO &RPSOH[ 0HQGLD

7KLV LV D FD P WKLFN EDQG RI PDVVLYH HFORJLWHV

ORFDWHG DW WKH EDVH RI WKH HFORJLWLF JQHLVVHV DQG LW VKRZV

VLPLODU FKDUDFWHULVWLFV WR RWKHU PLQRU HFORJLWHV LQFOXGHG

LQ WKH HFORJLWLF JQHLVVHV 7KH &DULxR *QHLVVHV DERYH WKH

HFORJLWLF JQHLVVHV VKRZ PHWDPRUSKLF SHDN FRQGLWLRQV

FDOFXODWHG DW

“ ƒ& DQG “ NEDU &DVWLxHLUDV

&RQVHTXHQWO\ LW LV FOHDU WKDW WKH &DULxR *QHLVV

HV ZHUH QRW LQYROYHG LQ WKH +3 +7 HYHQW DQG WKDW WKH

FRQWDFW ZLWK WKH HFORJLWLF JQHLVVHV LV DQ LPSRUWDQW H[WHQ

VLRQDO GHWDFKPHQW 7KH PHWDPRUSKLF MXPS EHWZHHQ ERWK

*HRORJLFDO FRQWH[W

)LYH DOORFKWKRQRXV FRPSOH[HV SUHVHUYHG DW WKH 1: RI

WKH ,EHULDQ 0DVVLI FRQWDLQLQJ RSKLROLWHV DQG KLJK SUHVVXUH

WHUUDQHV DUH FRQVLGHUHG WR EH UHPQDQWV RI WKH 9DULVFDQ VX

WXUH )LJV DQG 7KLV VXWXUH LV URRWOHVV DQG SUREOHPV

H[LVW IRU D FOHDU FRUUHODWLRQ ZLWK WKH RWKHU VXWXUH ]RQHV

GHVFULEHG LQ WKH EHOW DOWKRXJK LW LV JHQHUDOO\ DFFHSWHG

WKDW DOO RI WKHP FRUUHVSRQG WR D XQLTXH PRUH RU OHVV FRP

SOH[ RFHDQLF GRPDLQ WKH 5KHLF 2FHDQ 6LPDQFDV

HW DO

0DUWtQH] &DWDOiQ

HW DO

7KH DOORFKWKRQRXV

FRPSOH[HV VKRZ D ODWH 9DULVFDQ V\QIRUPDO VWUXFWXUH DQG

WKH\ DUH FRQVLGHUHG WR EH ODUJH NOLSSHQV FRPSRVHG RI VHY

HUDO WHUUDQHV VWDFNHG LQ D KXJH DQG VWUXFWXUDOO\ LQWULFDWHG

QDSSH SLOH )LJ 7KHVH WHUUDQHV UHFRUGHG GLVWLQFWLYH

WHFWRQRWKHUPDO HYROXWLRQV DQG DUH LQWHUSUHWHG DV GLVPHP

EHUHG IUDJPHQWV RI D SRO\F\FOLF 9DULVFDQ DQG HR 9DULVFDQ

DFFUHWLRQDU\ FRPSOH[ (DFK RI WKH DOORFKWKRQRXV WHUUDQHV

DUH VXEGLYLGHG LQ XQLWV ZKLFK UHFHLYH ORFDO QDPHV EXW

WKH\ FDQ EH FRUUHODWHG DORQJ WKH 1: ,EHULDQ FRPSOH[HV

&DER 2UWHJDO ÏUGHQHV %UDJDQoD DQG 0RUDLV FRPSOH[

HV DQG WKH 0DOSLFD 7XL 8QLW IROORZLQJ VLPLODU EDVLV WR

WKRVH XVHG E\ $UHQDV

HW DO

,Q D GRZQZDUGV VWUXF

WXUDO RUGHU WKHVH WHUUDQHV DUH FRQVWLWXWHG E\ XSSHU XQLWV

RSKLROLWLF XQLWV DQG EDVDO XQLWV ZLWK D IURQWDO VHUSHQWL

QLWLF PpODQJH ORFDWHG DW WKH EDVH RI WKH SLOH WKH 6RPR]DV

0pODQJH $UHQDV

HW DO

%HORZ WKH DOORFKWKRQRXV

FRPSOH[HV WKH 6FKLVWRVH 'RPDLQ RI *DOLFLD 7UiV RV

0RQWHV RU 3DUDXWRFKWKRQ VKRZV D VLPLODU OLWKRORJLFDO

FRQVWLWXWLRQ DQG WHFWRQRWKHUPDO HYROXWLRQ WR WKRVH FKDU

DFWHULVWLF RI WKH ,EHULDQ$XWRFKWKRQ &HQWUDO ,EHULDQ =RQH

RI WKH ,EHULDQ 0DVVLI

7KH XSSHU XQLWV RI WKH &DER 2UWHJDO &RPSOH[ DUH VXE

GLYLGHG LQ DQ XSSHUPRVW PHPEHU ZLWK LQWHUPHGLDWH SUHV

VXUH PHWDPRUSKLVP ,3 XSSHU XQLWV DQG D ORZHU PHPEHU

DIIHFWHG E\ KLJK SUHVVXUH DQG KLJK WHPSHUDWXUH PHWDPRU

SKLVP +3 +7 XSSHU XQLWV 7KLV WHUUDQH LV FRQVLGHUHG D

UHPQDQW RI D &DPEULDQ SHUL *RQGZDQDQ PDJPDWLF DUF

)XHQODEUDGD

HW DO

ULIWHG IURP WKH PDLQ FRQWLQHQW

*yPH] %DUUHLUR

HW DO

DQG DIIHFWHG E\ D SRO\PHW

DPRUSKLF HYROXWLRQ GHYHORSHG GXULQJ WKH PDJPDWLF DUF

VWDJH DQG ODWHU GXULQJ HR 9DULVFDQ WLPHV $EDWL

HW DO

)HUQiQGH] 6XiUH]

HW DO

7KH RSKLROLWLF XQLWV

DUH JHQHUDOO\ VXEGLYLGHG LQ ORZHU RSKLROLWHV DQG XSSHU

RSKLROLWHV ZLWK &DPEULDQ FD

0D DQG 'HYRQLDQ

FD

0D DJHV UHVSHFWLYHO\ DQG WKH\ DUH FRQVLGHUHG

WR UHSUHVHQW WKH RSHQLQJ DQG FORVXUH RI WKH 5KHLF 2FHDQ

'tD] *DUFtD

HW DO

$UHQDV

HW DO

6iQFKH]

0DUWtQH]

HW DO

7KH EDVDO XQLWV UHSUHVHQW

D VHFWLRQ RI WKH PRVW H[WHUQDO *RQGZDQDQ PDUJLQ VXE

GXFWHG DW FD

0D GXULQJ D FROOLVLRQDO HYHQW FRQVLG