Geochemistry of pyroxenitic and homblenditic xenoliths in alkaline lamprophyres from the Spanish ...

30 Pages·2011·1.25 MB·English

Geochemisotfpr yyr oxenaintdih co mblendxietniocl iitnha sl kaline
lamprophyfrroems t heS paniCsehn trSayls tem
b
DaviOdr eja,nC aaar,lV oisl lasecAa.aP ,a tBerruscoen
*
aDepartamednePt eot roloyg Gieao quimiFcaac,u ltdaedC ienciGaeso l6gicUansi,v ersiCdoamdp lutenMsaed,r i2d8 040S,p ain
bDepartmoefnE ta rtShc iencUensi,v ersoifBty r istBorli,s tBoSl8 l RJU,n iteKdi ngdom
Abstract
Thea lkalilnaem prophyarnedsd iabasoefst heS panisChe ntrSayls tecma rray h eterogenseuoiutsoe f x enoliths which
includsecsa rpcyer oxenaintdih co rnblendtiytpiects h acta nb ed ividiendt wog roup(sa:p) y roxenxietneo liitnhcsl,u dsipnign el
clinopyroxaenndis tpeisn weelb sterwiitteghsr anoblatsetxitcu raensd(, b )h ornblende-becalriinnogp yroxeannidht oernsb len­
dite(sh eraeft erc allheodrn blendixteinco litchhsa)r acterbiyst ehdep resenocfeT i-rikcahe rsutaimtpihci boalned m agmatic
texturBeost,hg rouposf x enolictahnsb ea ssignteodt heA l-augsietrei oefsW ilshiarnedS herva(i1s9 75[)W ilshiHr,eG,"
ShervaliWs", 1 975A,I -augaintdeC r-diopsuildter amaxfiecn oliitnhb sa salrtoicck frso m westeUrnn iteSdt atePsh,y sC,h em,
Eart9h,2 57-27w2i]t AhI -riacnhdC r-pomoarfi cp haseCsl,i nopyroxsehnoewas v ersyi miltarra ceel emecnotm positiinao lnl
oft heu ltramaxfiecn olitchhsa,r acterbiysc eodn vex-upwcahrodn drite-nonnRaElEi psaetdt ernasn dl owc ontenotfsi ncom­
patibellee menstusc ha sR b,B a,T h andN b,K aersutiintt eh ea mphibole-bexaernionlgi sthhosw sa similcaorn vex-upward
REE pattearns c linopyroxWehnoel,e -roacnkd m ineragle ochemissturpyp oratn origians c umulatfreosm alkalitnoe
subalkamleilntefs o rm osto ft hep yroxeniatnedhs o rnblendittheahsta veb eens tudiTehde,S r-Ndi sotorpaet ioofsp yroxenite
xenolitdhiss pltawyo e xtremceo mpositipoonlaelso :n ec linopyroxpelnoittisen t heO IB fieldt owarddse pletveadl ues
8786
( Sr/ Sr=0,70a2n8dE Nd=6,2w)h,e reatsh eo thepry roxeniptleosit n e nrichleidt hosphfieerlidc(s 0 ,70t5o 0 ,70a6n d
-2,8t o- 3,4, respectivwehliyc)hi, m plitehsa dti ffermeangtm ash aveb eeni nvolviendt heigre nesiTsh,e h ornblenditic
xenolistuhi thea sa veryh omogeneoiusso topciocm positciloons,te o t hei sotopicdaelpllye tveadl ueosfh ighEN da ndl ow
87 86
Sr/ Srra tioofso neo ft hep yroxenxietneo litShosm,eo ft hesuel tramaxfiecn oliftahlswl i thitnh ei sotopcoimcp ositional
rangoef t heihro satl kaldiynkee sw,h icahl sdoe finae bipolcaorm positifioenladsl,u ggesttihnagmt o sto ft hema rec ogenetic
witthh el amprophyPr-eTs e,s timaytieeslt de mperatiunrt ehser angoef 9 70-018 0° ca ndp ressumraeisn lfryo m 0,9t o1 ,2G Pa
forp yroxeniwtheisl,hs otrn blendxietniocl igtihvsle o we(ra npdr obabulnyd erestimparteesds)u (r0e,s7 -0G,P9a )T,h ipsr essure
rangies i na greemewnitt hp yroxenibteeisn fgo nnedb ya nu nderplateivnegn att t heu ppemra ntle-locwreursb to undary,
whereapsr essuerset imaftoerhs o rnblendixteinco listuhgsg eesqtu ilibrwaittihoitnnh el owecrr ust
KeywordUsl.t'r amxaefinco liPtyhrso;x enites; HoSmpbalneiCnsedhni ttreSasyl;s teLma;m prophyres
1.I ntroduction enitareeis n terparsfre atgmeedn otfsh igh pressure
crystal-sefrgorme mgealttiflsoo nwsi nthgr ough
Alkalmiangem as comcmarormnyal fiyanc d ul­ conduiintt sh em antloer c rystailnlm iasgemda
tramafic xtheanctoo lnisttahiv sta ultuea bleo fs ocuhramcbee r(Wsi lshainrdeS her,v a1i9s75F;r ey,
infolTIloantth ieon na tuorfthe e u ppemran tlaned 198I0rv;in g,1 98B0;o dineitae lr. , 1S9u8e7na ,b;
them antle-lcorwuesrt bo(uNnidxaro1yn9 ,8 7; and F1r9e8;y7W ,i lkinsoann dS tolz1,9 9H7o;e t
McDonou1g9h9;,0D own,e 1s99;3G riffient a I., al.2,0 0)0,p roviidnifnoglTI laabtoifruoatnc tionation
199)9.T hea lkaldiynkese w armo f tShpean ish ofb asamlatgimcai snth em antlNeo.n etheoltehsesr,
CentrSayls te(mS CSh)a sth reem aino utcroposr ighianvsbe e eand vocastuecdah,s s olid-state
(peguerBienmousyS, a linanedr Soan Bartolome recycolfsi unbgd ulcittheods p(Ahlelreeang dr Teu r­
deP inare(sF)i 1g).,w hersec arpcyer oxeanndi tec ot,1t 9e8)6an d derivbaytm ieotna soflmuaitodirsc
homblenxdeintoilarcie thr se corNdoeu dn.a mbigub­ym elt-rreoacckt( Giarornisand doB odi,n1 i9e9)r9.
ousp eridxoetniotlehi athvsbe e efno unidnan y of As theS CSa lkalinec arrdanyy kaebsu ndpanotp ­
thSeC Sl amprophyres. ulatoifog nr anulxietniocl iithnst,e rparset theed
Althoupgehr idoxteintoilarcie thu ss uamlolrye residcuoauln teorfpth arte o utcroHpepricnygn ian
commothnan pyroxebnoittthey spar,ee sc ommonlygr anitbiact ho(lViiltlha estae lc1.a9, 9 )9,p yroxenite
associianat lekda lvionlec anriocc kMso.s pty rox-xenolciotuhlsbd e a lscoo nsidpeartr eodft he
D Sedimenrtayr ocks
"'"
.",. ToleiiMteiscs ejana-Plasednyckiea N ,
..... Alkalisnyee nitpiocr phyries �
.,.,..,... ALKALINE LAMPROPHYARNEDS D IABASES
....
--_ Calcalkaldiynkee s
D Plutonriocc ks
D Metamorphriocc ks f
® Segovi.ao- ..
Peguerinos
@ ..· �·-·.-1--
SanB artolomdee P inares ,
@
Bernuy Salinero
o 10 Km2 0
Talavera I I
o de lRae ina
Fig.1 .S ketcmha p showinlgo catioofSn C S alkalilnaem prophyresd iaabnads teosg ethweirt ho thepro st-Hercydnyikaesn w armsS.a mple
localimteinetsi oniendt het exatr er epresenatsPe :dP equerinSoPs:S, a nB artolomdee P inaraensd B S:B ernuyS alinero.
resikdeueaollfg ranitoaisid ths a,bs e einn terpre2t.G eedol ogicbaalc kground
inth eS ierNreav abdaath ol(iDthu caneda S aleeby,
1998D;u ce2a00,1 2,0 0)2. TheS paniCsehn tral iSsyan s otreomg etneircr ane
Hornblepnydreo xexneintoelw iiththsi anl kalinmea incloym poosfeH de rcygnrianan iitnei stc se ntral
rochkasv bee edne scrwiobreldd w(iBdreo oaknsd part.T higsr anibtaithco lwiatslh a ter intruded during
Pla1t7t95,;W ilshanidr Seh erv1a79i5sV;,inx and PermitanoJ urastsiimcbe yss evedriaflf erent dyke
Jun1g79,7 ;Fr eanyd P ri,n1 z798;D autertai la1. 89,7) suitTehse.sd yek ceso nsoifcs atl calskhaolsihnoen,i ­
and thehya voeft ebne erne lattothe edi hro s(tM en­ tiacl,k aanldit nheo letiyip(teViislc sel caeata l,2. 00)4
zi,e1 s893;W itt-Eickansdc Khramem n, 1 998)o,r (semea pi nF gi.1 )T.h ea lkadlyiknseew armcsan b e
considuenrreedlm aatiendal,smy e tasomamtani­zedd iviidnettdow og rou(pisb):a stiouc l trablaams­ic
tlfrea gmeonrta ssc umulafrtoemps r evimoaufsi c proph(ymraeisn clamyp toniantde csl)o sreellya ted
underpleavtein(Cntagsp eedtra iI, 1. 89;9F reayn d diabaansde (si,rie )gd a bbrtoosi yce npiotripch yries.
Prin1z79,8I ;r vi1n89g)0,. Ultramaxfiecn olhiatvhoesn lbye efno unidnt he
Peridxoetniotleani dt lhess frse quenptylryo xe­ultrambeamsbiecr tsh aeol fk adlyiknseeu ite.
nitaned amphibolex-ernioclhoi fthm san tloer Thea geo fth esleam prophanydr deisa baisse s
lowecrr usdtearli vahtaivobene edne scriinb edc urreunnrtelsyo lvTehdey.h aveb eedna teadt
differareenatos f th e lberian Pe(Annicnoscuhleaa2 8±33 0M a (Rb-iSsro chBreoane ;ta l.1,99 9),
andN ioxn ,1 897C;a pedertai i .19,8 9an)d from 27±75 Ma (K-Arin p hlogoVpiiltlea,es tea cIa. ,
westanedrn c entEruarlo (pBee ck1e797r;,P raegel2,0 0)an4 d2 6±4 1 3.M a( Ar-Arin am phiboPleer,i ni
19;8 H1u ntaenrd U p ton1,89 7D;o wneesta l,. eta l�2. 00)4,b uthte g eochronodlaotargaei s ctaill l
200;1U ptoenta i.2,0 01Do;w neestal .,2 002; poorcloyn striansi uncaehc d o mpldeyxks ew armA.
Carraro aVisnOdrul , 200;3 Wi-tEtickscahnedn Permiaang eo f2 70M a isu sehde rfeo irs otopic
Kramm , 1998).T hesxee nolsiuthi tarees m ainlyc alculations.
enclowsietdhh ions t alkalirnoec kwvisoth l caniScC Sa lkadlyiknceeos n staih teutteer ogseunietoeu s
agersan ginfrgo mC enoztooiQ cu aterntariym es.a ccortdothi eniggr e ocheanmdip ceatlr oclhoargaicc­
Muclhe sfrse queunlttlryam xaefinco lhiatvbhees e n teri(sVtiillcassean cda d el aN uez1,89 6B;e aa nd
descriinbP eadl aeoizgoniecor uosc kmsa,i nilny Corre1t89g;6eB ,e ae ta l.1,99 9;V illaestae Ic.a,
thBer itIisslh(per sa e,g1 e9l8;1H untanedr U pton,2 004).To gethweirthu ltramafic xtheenyao llsiot hs,
1897D;o wneesta l.2, 010; Uptoenta l,.2 00)1. carrkya erscultiintoep,y anrdop xleangei oclase mega­
Recelyns,to muel tramxaefinco lsiuthi tfreosmth e crysts, xpernoobcarmbyilsnyte irLcaam lpsr.o phyres
CenozPouiyBc e auvnoiltc (aFnroe Mnacshs Ciefn ­ shoaw s ignificcaonmtp osirtanigotenh aailts a lso
trahla)v bee edna teadt2 5±76 Ma (U-Pibn reflecitnte hdeS iranr d N di sotroaptiTicho eshs.ae v e
zircFoenm,e neitaai ,s.2 00)3.T heu ltraxmeanfioc­ deplettoee ndr icchoemdp osi(tViiUoanssee tca aI .,
litdhess criibnthe ids p aperre pretsheenfi tr st 200)4e,x tenodviethnregw holOeIB fielAnd .o rigin
occurroefnm canet lxee nolibtehlso ngtiona g bym eltoifann ge nricshuebdc ontuipnpemenanrtt alle
Palaeoszuobicco ntiunpepnemtrana tllu en dethre adte pthbse towf6e 0ean nd 8 5Km ispr opofsoterhd i s
lberPieanni nsula. magmat(iBesaem t a l1.9,9 ;9V illaestae. lc2,a0 40).
In thiwso rwke,p resaeg neto chedmaitscaeaf tlo r Theu ltraablaksaidlcyi knceears r sye vetryapolef s
mafica ndu ltramapfiycr oxeanndi rteilca htoernd­ xenol(iVtihlsl eatas le,1.c 9a3, 81 999V;i llaasnedc a
blendxietniocli intt hhPese rmiaalnk adlyikneoesf del aN uez1,89 ;6O rejaannadV illas2e0c0)a3:,
the S(CbSug leko chemanidc iaslo toanpailcy ses),
togetwhietlrha saebrl atIiCoPn- MtrSa ceel ement1 G.r aniantdimc e tamorpxheinco lsiitmhitslo tar h e
microanaolfy smteahsie n mineral compownaelrnlot csk.s .W e
discthuesp sr oceisnsveosli vnthe edio rr iangdith ne 2.L ower-cgrruansutlaxilet niocl iths.
natuorfeth eisro urcbeyse ,s timamteilntigsn 3.Ma fican d ultramxaefniocl iths.
equilibwriituhxm e nolicthilin co pyroaxnedn e
amphiboanldeth ,ep ossciobnlnee cbteitowneh eons t Thew idespgrreanaudlx ietnioclh iatvbhees e inn i­
dykanedsx enoliths. tiaclllays sinitfthoi reemdea itny p(eVisll aseetac l,a.
1999)(:i f)le stioc inteclTIhlameodcikai(ttiemei es)t, a ­xenolanidta hp so,s sliibnlkewa igtthehe l amprophy­
peliantde (si ifile)s miect a-igtnyeepsotu;hs el ast ricd ioarb maesliotcfths e h osdty kiessaq uesttioo n
grourpe prearsoeunntd i9n5v %o luomfeth e totabled iscu(Osrseedjan andaV illas2e0c0)a3,A. m phi­
oft hger anulxietniocsl uiitTthh ee.xs een tohllsii kelyb ole megacryasbtusn darianentt haoel ustoc rops
come frdoifmfre enlte velsl oowfce rrthu es tt hanedi rw here xenoflouinthds. are
orighaisnb e eenx plaaisng erdan ulrietsiicad ftuear Twot ypoefs ultramxaefinco lhiathvse sbteuedn­
granimteilcetx trtaicon. iedin th is wo(rapk)y: roxexneintoel wihthisc,h
Ultramafixce nolrietphrsem suecnlhte tshsa 1n % corresptootn ydp 2e p yroxeonfiO treesj aannda
in voolfut mhteeo txaeln oploiptuhl actariroine d bVyi llas(e2c00a3) , an(db )h ornblenxdeintoilci ths,
thael kadlyikneeT sh.e se rare umlatfircam aanfdiw ch iccho rrestpoto ynp4dex enoloifOth rsjane aan d
xenolhiathvbsee ecnl assiinfitfeooudr taycpceosr dV­illa(s2e0c.0Wa 3e )d on oitn clxuedneo lfriotmh s
intgo thpeeitrrro agphanyd mjaroe lemmeinnte ralt yp1e s andi nt3 h is bweocraktu hseeary e highly
chemi(sOtrrjyae naan Vdi lla2s0e0)c3:a , alte(r>e7dv5 o l.o%fs encdoarmyi nerianml oss t
caseansdt) y picvaelrlyy small.
1H.i ghallyt eurletrdam axfeinco lwihtihcpshr eserveH ornblenxdeintoilmcio thssta lppye ari no ne out­
Mgan d Cr-rdiicohp sbirdoewssn,p i nanedl e de­ cro(pBe rnuyS alinwehreor)pe,ya rso xexneintoel iths
nitic oamlpeFh.ri ebsh olivine hash avnbeee vefenour n dib nte herne e doiuffrteocrpearsno tu nd
fuondi nt htisy poefx enoliths. PeguerinionSs an B anartdo lomeP idnear(F eis.g 1 ).
2. Pyroxxeennoiltcielt ihnso:p yraonxde niwteebNs­e veerlthedsuset, o th eir lsarigzheeor,rn blenditic
steritAeIs- rwCiircth-h p,ao ugoirtc lei nopyroxxeennoel rietpshersne mto re 5than0v o%l .o fs ampled
and AI-roircthph yoroxanedn ger epenl eonastueltr.a mxaefinc oliths.
Thenye vceorn thayidntr eamdi ner(ahlosrn blende,
phlog)o.p ite
3.P yroxexneintoelw iitthhh ysd ramtiendes r:cal lin­3.A nalytitceaclh niques
opyroxewniitCthre -sr ciilcn ho pyropxaregnaes,i ­
tiamcp hbiolaen dT i-rpihclho goSppiitniees.l Majro element cmoimnpetorIsaOwIlna sd eter­
alwaaybsse nt. mined thaeCt e ntdreoM icroscEolpefcat ronica
4. Hornblenditic xheonrnobllietnhdsi":tL iucgiB asrb ub"(r Coopimlcu,t enUnsiev erosfi Mtya drid)
and hbolrnnedec linopyrxoexneonlisithtiohcws ­ usianJ ge oJlZ A8-900M electron microprobe with
inga heterogemnienoeourgsai lccaolm positifoounwr a velednigstphe rsspieovcmete rteArnsay.ls es
(clinopykraoexresnueart,gi atseip-tplea,g ioclwaesrepe,e orlTIflewdi tanh accelevroalttioanfgg1 e 5
blascpki nTeil-,rp ihclho tgeoa,pp iatteci,ar bonatek,V and ane lectbreoamcn u rroefn tnA2 ,0 w ith a
ana1canidt pes eudomoorfop lhisv iCnlei)n.o pybre­amd iameter)lITl. oEfl e5m ewnetrcseo unftoe1rd0
oxenaned kaershuatviaet ew icdoem psiotionsa l otnhp ee ak an5d s eaocnbh a ckgrpoousnidt ion.
rangec hararcitsebeyd high lToiw C ran d Correcwteiromena sdu es ing mZeAthPo d.
contents. Concenotnrosaf 2t7tri aceel eme(nRtEsBE a,R, b ,
ThU,, Nb , Ta, SPrb,, HZf,r ,VY, , C r anNdi i)n
Tyeps an2d 4 arbey fu rth em ost abuulntdranat­s iclaitmei ner(acllsi nopyamrpohxiebnoeanl,de
mafxiecn oliintth hsSe C SIam propehsyOr.r eanjaa nd phlogowpeirtdeee )t elTIliinns eidto un> 1 03 )lITl
Villa(s2e0c0ra3e )l thaethe i ghallyt eurletdr amafithci cpko lissheecdt iolnass aebblrya ti(oLnA -rCp­
xenoltiotht she C r-diospusiitdeWe i losfh ainrde MS)a tth eU niverosfBi rtiysu tsoilnV gG E al emental
Sherv(a91i7s,5 a )lscoa llgerdo urp bFyr eayn d PlasQmuaa3dr C-PMSc ouptloe Vd Ga LaserProbe
Pri(n91z78 ;)t yp2e s andx e4n olarietr hesl attoe d I(I2 6nm 6fr equeqnucaydp-rlueNdd -AYGl asTehre) .
Al-auegnictlea (vWeisl sanhdi rSeh erv1a9i7s;5, countinfgor toainnmeae l wyassti ysp ic1a00l lsy (40
grouIpIo fF reanyd Pri,n1 z798);wh ereas tysp em e3a surbilnangtk o g basel sittsahbhea ckgranodu nd
pyroxecnanintobetes esaos cillays sified wi6th0i ntf hoorerne em aionfdth eeanr a lsyisT)h.ed iametoefr
ofth esger pousA. c umuloartiefrg oimnb asamletlitcs laserw absare oamu n2d0)lITl . TheNI ST6 10 an6d1 2
hasb eepnr opofsoemrdo sotf th e SCSu ltramafigcl asstansd ardwse rues etdoc alibrrealtaeetl ievmee nt
sensitfiovthrie tan iaelsy soefths e s ilimcianteer alansd. c rystallpoobllyasgttoxeintcau lrar eeths e c om­
Eacanha lywsaisns o rmaltioCs aeu ds icnogn centram­oneisntht e p yroxeTnhiethyea svm.ei nerwailtash
tiodnest ermbiyne elde ctrmoinc roprVoableu.e sm arkelda cokft winnanidnc gh emizcoanliM nogr.e ­
reporitnTe adb l5 ec orrestpoos nidn ganlael yseso vepry,r oxcernyes nteavlseshr o lwam elleaxro lu­
fromth es ameth ins ection. tioOnn.th eo thehra ndt,hp er eseonfcc hee mical
Wholreo cmka janodrt raeclee maneanlty soef7s zoniinnsg o mceil n opyrotxoegneethwsei,rth i dio­
xenolanidt thhes3 hosatl kadlyikneews e rdee ter­morphhiacb iantds t hceo mmon potixekutirolef i tic
mineadtt hCeN RS-RCPGN ancTyh.es amplweesr e amphiboelnec,l oosthienprgh asseusg,g aem satg mat­
meltuesdi LnigB 0an2d d issowlivthHe Nd0 3.S olu­ico rigfiothnre h ornblenxdeintoilcTi hthesm .o dal
tiownesr anea lysbeydi nductciovuepllpyel ads mac omposiotfti hoxene sn olariethl si sitneT da b1l.e
atomeimci sssipoenc tro(CmIPet-rASyE)f omra jor
elemewnhtisltr,sa tce el emseh natvbee edne termin4e.d1Py .r oxenites
byI CmPa sssp ectro(mIe-CtMPrSUy)n .c tearinitni es
majoerl emse arnetb rackbeettewde 1e annd 3%, Thigrso upc omprirsoneudse tdo p lanars pinel
excepMtniOn( g5 -10an%d)P 20(S>1 %0)C.ar ignan clinopyranodx eonniest peisnw eelb stxeerniotlei th
eta l(.2 00h1a)ve ev aluthaetp erde ciosfNi anocny thata rvear iabilnse i z(e0 .4-c3m.)(T5 a ble 1)and
IC-PMS analysaetls o wc oncentlreavtefriloosmn witah g raintsahitaz lem onsetv eerx cee3d msm .
repeaantaeldy soefths e i nternasttanidoarndaBslR Comomnlthye,ys hoewq uigrganrualnaro btleaxs­tic
DR-N, UB-Na,n dGA HN.T- hGep recifsoiRrob n, turweist,wh e ll-devterlijopuplneecd t Oirtohnosp.y r­
SrZ,r Y,, V,G a,H fan d mosotfth eR EEi si nth e oxenaned clinopyarreou xnecnoel othuerf eodr;m er
rang1et o 5w%h,e rtehaesry an gfreo m5 t o1 0%f or isu suaallltye rMegd- rticohc lho wrhiitltesh ctel in­
three osfttr aceel emeinntcsl,u Tdmi.Mn ogr ien for­opyroxdeinsepspl uarypr leea ctriiomansg aitnhset
matioonnth ep rocedpurreec,ia snidao cnc uroafc yh os1amt p rophPyyrreo.x exneintoelu isthusa hlalvye
NancyI CPS-a Mnalyissse pse cibfiyeC da rigenta ni ntergsrteisetpnii anloe ful p t o1 3% inm odaned
al(.2 0.0 1) occasioancaclelscysa olrcySi otmeae.c cesssuolr­y
Thredey ketso getwhiethor n eam phibomleeg a­ phidaepsp enare arth eb oundoarfthy e x enolanidth s
cryansdt6 u ltramaxfeinco lwietrshees l efcotSrer d­ area ssociwaittaehld t ermaitnieornSa elcso.n dary
Ndi sotaonpailcya stthi esC Al deG eocrloongoyi a browtnoy ellMogwr- icchh loirspi rtees aesvn eti ns
Geoqmuiicias optiocoaft hCeo mplutUennisvee rsiotrdy i ssemicnraytsetLdaam lpsr.o phmyerlictcan b e
ofM adruisdi,ann ga utomVatGeS de ct5o4mr u lti­seepne neetth reax tenolailthoscn rga cankds c ause
collethcetromria oln ismaatsissop ne ctreormw eitth locaallt erHaytdiroomnui.sn erlailkse ampanhdi bole
dataacqu irienmd u ldtyin ammiocd eI.s otroaptiico sp hlotgoearp eai bseAnltsr.oe markiastb halebe s ence
ofS ran dN dw ermee asuornae s du bosfew th orloec k ofo liviinthn ees tudpiyerdo xexneintoilci ths.
powdTehre.an alytpircoacle duusreiednths i lsa bo­ Thes picnleiln opyr1o0x1e28ni 9isp teet rographi­
ratohrayvb ee edne screilbseedw (hReeryeee tas I, . caldliyf fetrothe eno tth epry roxexneintoeli inth s
199)7.R epeataneadl ysoifs NB S 987g ave showian mgar kecda atclassttriucc wtiuthlr areg e
87Sr86/Sr=0.71±03 20(4 029,n =15an)d f otrh JMe porphyrocclliansotpiycr( o1>x. ec5nm e)ans d black
Nd standardt he143 Nd1/4�d=0.51±1 820(0902 , spincerly s(t>am4lm s) .
n=13T)h.e2 0e rroonr£( Ndc)a lculias±t 0.i4o.n
4.2H.or nebnldixteinco liths
4.P etrograpohfyx enoliths Thexseen olarieat lhsm ocsotm plerteesltryit cot ed
BernuSya linbeurstoi ,m ivlarari etariep erse sienn t
Thep yroxeanndih toern blenxdeintoilocif thth es theS anB artoolmed eP inaroeust crTohpeh.ya vae
SCS showa marketdxe turcaoln trast. Pyrvoarxieanmbioltdeea c lo mpostihtacitoor nr estpogo anbd­s
xenolailtwhahsya sva em etamor(pchriycs tallobbrloapiscyt,ri ocx eanndih toirncb lentdyiptTeihsce.m ain
orp orphysrtoifccal)ba rwihce,r ehaosrn blenvdai­timci neracloongsyoi fusntcso lotuopr uerdpc llei nopyr­
riehtaiveanes i gneoutsxe-tluiRrkeeec. r ystalliozxaetnbiero,on wam np hibopllea,g ioancdl balsaesc pki -
Tabl1e
Modalc ompositandi osni zoef S CSp yroxeniatnidch ornblendixteinco liths
Type Hornblendixteinco liths
Sample 101892 102131 104395 104543D 104546C 110034457513 1A0 3489 103657A1 04382 1043851 04389 104319014 392 1045291 04543B
P P P P P P BS BS SB BS BS BS BS BS BPS
Clinopyrox9e4n"e1 56"8 76"8 69"3 3K7 64"7 6L4 39"7 59"1 0"5 68"5 n7 76"] 66"5 n]
Orthopyroxene 32"6
Amphibole 3L6 40A 86"1 25"2 56"6] 5J 40"5 14"1 ]4"2 8"7
Phlogopite 0"8 3"0 L7 0"1 0"7 0"6
Plgaioclase L7 12"9 ]2"0 6"9 9"8 0"2
Apatite 0"3 2"8 0"7 0"6
Spinel 5"9 0"8 2"2 no 0"8 2"0 0"9 2"7 L6 0"9 45"1 9"3 35"7
Sulphides U
Calcite U 3A 0"6 0"9 0"3 0"2
Analcite L6 0"9 4"5 L2
Altered 9"8 ]8"8 30"7 6L3 22"3 4L3 0"6 18"6 2L9
Siz(ec m) OAx 2"2x 3 2"x7 3"x5 L2 1 x] "2 1 x 0"5 L5 x 0"7 1 x0 "6 3"x3 L2 BXL6 U xO"3 3Ax L7 x 0"6 L8x 0"7 2 x1 "3 2"x22 "8 ] x0 "5 0"x7 0"8
* P:P eguennoBsS;:B ernuyS alinerSoB;:S an Bartolomdee P inares"
neIF.r ueeqnttlhyeh,ya voet hmeirn erianml isn or mumo f0 .w6t .i%ns omhei gmhg n umbcelri nopyr­
proporstuicoahnsr s o undoeldi vpisneeu domorpohxse,n eTsi.0 2c oncentraartei aolnsqsou iltoew ,
interrsetdidtiisahlp- hblroogwonp itcer-ybsitoatlrisant,ge i frnogm 0 .t5o 1 2.w t.T%h.e irsea s litrgehntd
globcualarl ciinttee,r tsoot cietlaniaraa llc anidts eu b­ toh ighNear2 an0d Al230v aluaneds t ol oweSri 02
idiomorapphaitCcir tyes.t sahlossw u bidiomoranpdh CiacO c ontewnitthds e creamsg niunmgb (eiFr.g
habiandtar se u suaulnlzyo neexdc,e pstoimncegi1 n­ 2).O rthyorpoxeonfthe esw ebstxeerniothleai vtaeh
opyroxwehniecsshh ouwn colocuorreanedds p ale homogenceoomupso sariotuinoEdnn78 -EnaSnOcd an
purple rimsam.p hiPbooeilnkeci lloicstliiincng o pybre­c alssiafisAe Id- rCirc-hp,bo roorn (zAit13e2fr 0om
oxenaned probaoblliyv pisneeu domiosrc pohms­ 72.t o7 .w9t .an%d Cr230fr om0 .0t1o0 .0w5t .%)
mon,b utam phiboclane alsboe incluidne d (Talbe )2.
clinopyarsov xeeinnrsee, p resienntteirnggro orw ths,T hec linopyrfrooxmthe enh eosrn blenxdeintoi­c
intersastw ietlailspa lla,g ioancdla an1sacei Ptlea.g iol­iths uiartee T ian d AI-riCcrh-,p oaourg ittoe s
cladsoee nso sth oanwy textruerlaalt iwoinths hispa liTtheeshy.a vwei dceorm posirtanigoentsah lan
spinbeeli,nan g o rigiinganle omuisn erianthl e thoseo fth e pyroxenTiit0e(2s0 :. 5-w2t..7%5) ;
morgea bbrsoeiccto oftr hshe o rnblenxdeintoilci thNsa.2 0( 0.4-1.4C awOt( .1%7)-w;2t 4. %A)I;2 03
Thuass ,u bsoltirdaunss foorfsm paittnioeop lnl agio(­4-1w0t .%an)d mg values 0.fr6ot2mo 0 .84
clabsyed e pressuirsni osltai tlkyie.o n (Taleb )2.T heh eterogiennt ehicel tiyn opyroxene
Spinueslu aalplpye aasrsso cwiiattamhep dh ibolec omposbiettiwoense amnp leissa ccompanbiyae d
asi nclusGireoencnsl .i nopyirsso oxmeentepi rmeess­ corteor izmo nepda ttiensrn o mcer ysfrtoamlt sh e
enitnt hmear gionfss o mxee nolTihtmeha si.mn i ner­samxee nolcihtahr,a ctbeyra i dseecdsr eei anm g
al(sc linopyamrpohxiebnopell,ea ,g ioancdls apsien eln)u mbeCrr,2 0an3d Si02an,d an increians e
havvear iabglrea infrsoimza ef se wm icromteot erAs1 23,0T i0an2d Na2t0o warthdesr ima,si ndicated
morteh an1 c mT.h em argionfst hxee nolciathbnse witanh ar roiw nF i.g2 .T hes carcger ecelni nopyr­
zonoerds hoewv ideonfcc oer robsyli amopnr ophyroixce inseF e-r(imcgvh a luareosu n0d. 6an5d)T i-poor
melt. (sam1p0l3e4 839i -nT2 ab2l)e.S imicloarm position­
Simixleanro lailtsahocs c,o mpabnyki aeedr sutailtt er enodfNs a ,S iC,a an d Alw ithd ecreamsgi ng
megacrhyasvtbese e,dn e scriinPb leido caelnkea linneu mbteothr o soeb serivnthe edp yroxearneis teeesn
bsaalfrtosmT allan(otSueth -eaSsptaeirn(Cn a)p edrii nt hheo mblendxietniocl iths.
et 1a9I8).9., Them aojre lemceonmtp osoiftc iloinn opyroxenes
fromb otShC pSy roxexneintoselu iitithsse ism itloar
thato fs omcel inopyranodxh eonrnibtlee xnedniot­e
5.M ineraclh emistry lithfrso mN ortheSrnc otl(Hanudn tearn dU pt,o n
198U7p;t oenta i2.0,10 ).T hissi milamraiitnileys
5.1M.a joerl ements consoifms itdt oh igAhIan d Tic ontemnotdse,r ate
mg valu(e0s. 66-an0d. l8o6w)C rc oncentrations,
5.1Py.r1o.x enes whicarhe regardaesdt ypiocfas le gregfraotme s
Thec linopyroofbx oethxn eenso tlyipt(ehps y roxb­saiacl kamlaignmesa( Wilesa hnidSr hvear,i1 s97; 5
eniantdeh so rnblenxdeintoilhcia tvhsesi )m icloarm ­ Freayn Pdr in1z798,) .
posittioto hnosos fet hAel -ausgeirtoiefeW si lisrhe
andS herv(a1i9)s7 5anthde g roIuxIpe noloifFthrse y 5.1A.m2p.h iboles
and Pri(n1z9 :7t 8h)ey lhoawMv geO ( alw<a1 y6s Theam phiboolfet sh eh ornblenxdeintoilci ths
wt.%an)d lowC r230 «0.7w t.%c)o ncentratarieko anesr suantdi ptaregssai tfeosl lotwhicenl ga ssifi­
(Tabl2)e. catioofLn ea keet a l(.91 97.A) sw itthhe c linopyr­
Clinopyrooftx hepeny erso xexneintoelari etC hrs­ oxenoefst hixse noltiytptheh ,ame p hibohlaevse
pooaru gittode iso pswiidthem gs n umberransg ing widceo mposirtaniognecashl ar actebryih siegdh
from0 .7t7o0 .8(5iF .g2 )T.h ehya vhei gAhl 230( 7- T0i2 (from2 .6t o6 .8w t.%a)n dl owC r230
11w t.%an)d lowN a20( 0.5w-t1. %) caonndt en«t0s. 3w t.%) coanndt megn ntusm berransg ing
Cr20i3su suablellyo0 w2. w t.%r,e achaim naxgi - from0 .5t6o 0 .7(7Ta ble )3.A mphiboslheosw
Tabl2e
Majore lemencto mpositoifop ny roxenes
Clinopyroxenes
Sample 10189
Si02 47.68 481.8 50.08 49.02 501.3 47.37 47.30 47.35 48.13 51.12 50.95
Ti� 0.87 0.55 07.9 0.66 0.46 1.42 2.51 1.64 1.44 0.13 01.7
Ah03 9.00 9.43 77.8 7.05 5.00 8.24 9.41 8.37 7.79 7.57 74.3
FeOt 6.91 5.78 5.31 5.27 10.77 6.92 7.19 7.29 5.73 11.3 3 11.49
Cr203 0.00 0.20 02.5 0.85 0.60 0.21 0.04 0.00 0.25 0.01 00.2
MnO 0.09 0.90 0.31 0.14 0.31 0.03 0.03 0.16 0.91 0.14 00.3
NiO 0.01 0.40 00.0 0.00 0.70 0.00 0.02 0.00 0.00 0.00 00.3
MgO 13.45 14.26 14.72 14.46 11.2 2 13.05 10.89 11.4 9 14.49 27.01 28.03
CaO 20.31 20.36 21.25 21.32 19.65 20.39 20.39 21.82 20.96 11.0 07.0
Na20 0.94 0.56 06.8 0.56 1.53 0.93 1.41 1.90 0.83 0.60 00.5
K20 0.00 0.20 00.2 0.01 0.00 0.00 0.00 0.00 0.00 0.01 00.2
Total 99.26 99.38 100.83 92.56 99.02 98.56 99.28 99.39 99.99 98.66 98.93
Caticoanlsc uolnat thbeead s oifss i oxxy gens
Si 1.759 1.678 1.83 1 17.93 18.87 1.767 17.59 1.570 1.767 1.384 1.87 1
A1JV 0.214 0.322 0.187 0.027 0.113 0.233 0.241 0.520 0.233 0.166 01.83
Ahn 0.510 0.172 0.415 0.116 0.109 0.129 0.161 0.131 0.102 0.161 01.29
Ti 0.024 0.051 00.22 0.081 0.081 0.040 00.60 0.401 0.040 0.004 00.05
Fe 0.213 0.180 0.515 0.175 0.339 0216 0.248 0.425 0.175 0.340 03.43
Cr onoo 0.001 00.07 0.071 0.002 0.006 0.001 0.000 0.007 0.000 00.01
Mg 0.740 0.780 07.94 0.788 0.630 0.726 06.07 0.658 0.790 1.444 14.90
Ni onoo 0.001 00.00 0.000 0.002 0.000 0.001 0.000 0.000 0.000 00.01
Mn 0.003 0.003 00.04 0.004 0.001 0.010 0.001 0.005 0.006 0.004 00.01
Ca 0.803 0.081 08.24 0.385 0.792 0.851 0.839 0.483 0.812 0.042 00.27
Na 0.067 0.046 00.48 0.046 0.909 0.067 00.83 0.708 0.059 0.004 00.04
K 0.000 0.001 00.01 0.000 0.000 0.000 00.00 0.000 0.000 0.001 00.01
Catiosnu m 4.000 3.999 39.99 4.000 4.000 4.000 4.000 4.000 4.000 3.999 39.99
mg 0.78 0.81 08.4 0.28 0.56 0.77 0.17 0.37 0.82 0.801 0.801
End-members
Wo 45.65 45.40 46.36 46.33 44.75 46.36 49.05 481.4 45.82 2.31 14.4
En 42.07 44.24 44.68 43.27 35.55 41.30 35.48 37.59 44.07 78.09 80.09
Fs 12.28 10.36 89.6 9.59 19.07 12.34 14.66 14.72 10.11 18.97 184.7
60
Si02 • Cpx opfy roxenltes
Cpxof Webstent1e0 2131
o Cpx ohfo rnblecn xdelnDo llths
• ZoneCdp xf roms ampl1e0 3489
-
.
50I- 00 �=,. �.10I-
0 00o �'Oa::so II ". o
o 0 0
0
40 O������I�����I����
0.6 0.7 0.8 0.90 .6 0.7 0.8 0.9
30������,�����,���� 5��������������� -
CaO
o
-
-
-
o
1I-
10 I I 0
0.6 0.7 0.8 0.90 .6 0.7 0.8 0.9
2 I I 0.8
Na20 Cr203 o
�
0.6
0 0 �,0 O 0 �� -
0 o 0
o
1I- 0.4
I.a��·
00 • 0.2
0
0
00
0 I I 0
0.6 0.7 0.8 0.90 .6
mg
Fig2. .Va riatdiioang rafmorsm ajoerl emencto mpositioofcn ilsn opyroxefrnoems S CS xenoliSthhasd.e fdi elcdo rrespotnocd ilsn opyroxene
compositfrioomn w ebsterxietneo li1t0h21 31.T hea rrowdsi slpayc orteo rim crystazlo ninCgo.n tenotfso xideares plottaesdwt .%.
mg numbecrlsot soeth ato fc oexicsltiinnogp yr5o.x1­.O3t.h emri nesr al
enesC.o nsidaelrthlie n amgp hiboanlael ysteos­ Thse pinfreolmbs o tht ypoefxse nolairAteIh -sr ich
geththeerr,ie s a trentdo wardisn creaTsiwi inthg and Cr-p(oTaolbre 4 )N.e verthtehleearrseesc ,l ear
decreamsg vianlgu theistrs;e nidsa lsaop parienn td ifferbeentcweetseh nte w oty pesT.h ep yroxenites
theC aan d K concentr(abtoitdohen cssr ienag).h avger eceonm positmioornheao lmloyg enpeloeuos­
Neverthameplheisbso,l e acrrneyo sstti aglnsi ficanntsa­twei,th hi gAhl 23r0 angifrnogm6 1t o66 wt .%an d
lyz onefrdo mc orteor imT.h ek aersuustuiatlel hyi gmhg n umberransg ifrnogm 0 .5t8o0 .7(F1i .g3 ).
hsa pao ikitleixttiwuchr ielp,sar tgs aiitsei nterstiTtheih aomllb endxietnioclh iathvFsee -rbilcahsc pki nel
ori ncluwdietdhc iilnn opyroxene. witwhi dceorm opsitiroanngae(lsm gn umbefrrosm
Tabl3e
Major elemecnotm potsiioonf a mphbioles
Typeo fx enolith Hornblendixteinco liths
Sample 10438(22 01) 10348(93 6) 10452(91 37) 10347(15 2) 10439(29 8)
Si02 39.36 39.02 40.59 38.68 38.94
Ti02 5.25 5.18 3.57 5.23 5.67
A1230 14.81 14.64 14.84 14.46 14.90
FeOt 10.80 12.63 8.40 10.49 9.04
Cr230 0.00 0.80 om 0.00 om
MnO 0.12 0.00 0.09 0.70 0.11
NiO 0.70 0.30 0.00 0.01 0.03
MgO 11.8 9 10.43 14.91 11.0 9 12.28
CaO 1l.5l 11.31 11.30 1l.1l 12.83
Na20 2.88 2.69 2.80 2.59 2.63
K20 0.29 1.32 1.40 11.0 l.9l
Total 97.61 97.51 97.91 96.09 97.63
Caticoanlsc uolnat thbeead s oif2s 4 ( 0O,H, F)
Si 5.929 5.490 6.090 5.820 5.810
A1JV 2.701 2.056 1.910 2.180 2.186
A1VJ 0.556 0.570 0.713 0.370 0.435
Ti 0.625 0.590 0.403 0.600 0.640
Fe 1.361 1.60 1 1.054 1.320 l.3l0
Cr 0.000 0.001 0.010 0.000 0.010
Mg 2.690 2.370 3.174 2.670 2.730
Mn 0.051 0.000 0.101 0.001 0.010
Ca 1.080 1.580 1.817 17.90 2.050
Na 0.481 0.880 0.815 0.680 0.760
K 0.177 0.420 0.268 0.201 0.230
Catiosnu m 16.066 16.116 16.256 15.830 15.982
mg 0.66 0.06 0.75 0.76 0.71
0.3t6o0 .,5A 6l230fr om5 0to 60 wtan.d%s lightl5.y2 T.ra ceel ements
highTeir0c 2o ncentrTahtebi loanscspk)i o.nf es lam ­
pl1e 0819(2s p-clinoxpeynroolxsiehthno)iwc tsoe m ­ 5.2.C1l.ip nyoroxenes
positcihoarnaaclt ethraictso tninbceoscth gt r ou(piFg.s Clinopyrfrooxmeb noetpshy roxeanndi htoern ­
3)N.e vtheelresssp,i nfreolmts h ciast aasctclilci nopybrl­endxietniocl hiathvsve e rsyi mihliarg RhE E
oxensihtoehw i gheesrt imaet23e0c do nFc entratcioonntse(T,nab tlse5 )s,h owing convpeaxt-tueprnwsar d
plototuitnsgti hdgeee netrrael(n iFd.g3 ). onc hondrite-naobrumnadlanpiclseoe wtdis t thh e
Theh ornblenxdeintoilhcia thvTsei -rCirc-hp,o orp eaka bundanccleo tos eS rn or Eu.T heR EEa re
phlogopit(eT-ibr0ian2og tefrisot m4e . t7o 6 1.wt .% typicgarlelatyth eanr1 0t imcehso ndcrointcee ntra­
and Cr230< 0.wt2. %()Ta lbe4 )T.h earseeh eterogtei­o(nFsi 4gA.) .
neoiunsc omposirteifloenci,tnt e hdem igr n umbers MutIielepmreinmti mtanitvlee -normdailai­sed
(.0601.-)8an 0d Si0(23 43-7.wt5.% )a nKd2 0( .73- grams displsaiym ihloamro genpeaotust efrnosr
9.wt3.% )c oncentAraswt iithto hnceso .e xicsltiinn­gb otthy peosf x enoliwthist,Bh a ,Nb , SrZ,r
opyroxanedn amep hibothleem ,i css ahoaw s lightan d Tis howicnhgar actetrriosutgEihxcsc .e fpotr
compositrteinoodnf da elc reaSsiTi,in K,g a ndN a LILanEd somoeth eirn compaetliebmle(enN tbs,
witdhe creamgsn iunmgb er. Ta,S ran d Zr)th,e c linopyraroexar eonuens1d 0
Plagioocnlloaycs ceiu hnrosrn blexnendoiltiicth s antdi meesn ricwhietdrh e sptoe cptr imimtanitvlee
hsa hao mogenanedoeussic noem pos(iAtino-3nA l4S)'( Fi4gB.) .
4