Petrogenesis of Permian alkaline lamprophyres and diabases from the Spanish Central System ...

24 Pages·2011·1.44 MB·English

PetrogenPeesrimsi aaolnfk allianmep rophaynrdde isa bases
from Stphaen ish CSeynsttraeanmld t hegiero dynacmoinct ext
withwiens teErunr ope
D.O rejana V.i llCa.s .e cKaB. i llst.r om
B.A .P aterson
AbstracBta sitcou ltrabaalskiacll ianmep rophyresKe yawnodr dLs amproph·y Arleksalmiangem ati.s m
diabaisnetsr uwdietdht ihnSe p aniCsehn tSryaslt (eSmC S)A sthenosmpahnetr·li Pece rrniarni ft.iW negs teErnu rope
during PUeprpmeirTa hne.hi ir gLhRE E.L ILEa ndH FSE
contetnotgse,t whietrph o sitNibv-eT aa nomalliiensk,
theoirri gwiint thh ien filtroafts iuobnl ithoKs·prhiecrhiI cnt roduction
fluids. aTlhkeasldeiy nkeem sa yb ec lassiinfit ewdod is·
tingcrto uapcsc ordtiotn hgeS r-Nids otoraptei (o1sa): Alkallianmep rophayrcreoe nss idteobr eet dh eeq uivalent
deplePtReEdM A·laiskteh enoscpohmeproincae nndt(.2 a ) ofb asalrtoiccwk ist hhi gvho lactoinltee bnetisn,g related
BSE·lliikteh ospchoemrpiocn eAn stl.i gehntr ichimenn tto p artial omefl thaiy ndgr atmeadn tleen crhiedin
radiog2e07nPbia cn d20 8Pabl lotwhsec ontribuotfi oani ncompaetliebmleen ts 19(R91o)c.Tkh ei ncorporation of
recycclreuds otral li thospchoemrpiocn iennt th mea ntlev olatiistl heosu gthobt e d uet om etasomabtyii snmfi l­
souerscT.h ei ntruosfti hoinas l kalrniangern atiissl rni keltrya tiflnugi dosrs ilimcealttaess c endfrionmlg i thospheric
toh ave occduuretr oea dd iabadteicco mpreasnsdi oorn sub-lithossopuhre(creei.sHc ga .w keswoerta t11h.9 90).
mantulpew elliintn hgce onteoxftt h wei desprriettaidn g Mafica lkaline lamwperroiepn htyrrudeduserd i tnhge
develofrpoemd CarbonitfoeP reorurnsii annw esternU ppePre rrniant hiSenp aniCsehn tSryaslt (eSmC SO)t.h er
EuropTeh.ec ledairfr feencients h gee ochemaifficnailt y moofd eraatellkya lrioncekfr so mt hIeb eriPaenn insaurlea
LowePre rrnibaans ic mafrgomma nso rth-weasntde rnb roadcloye vwailtt hh ese lamp(rmoapfihdcyy rkeefrsso m
south-western Eubreio nptee rmpiirgneth teter dmo sf aP yrneeesD;eb oann dZ immerma19nn9) 3,o r are very
moree xtenssievpea raotfib oont rhe giodnusr itnhga ts imilar (iNno ratPghoe rg taulP;o rtugal-Faenrdr eira
periuondt.ti hle wye raes sembdluerdiU npgp ePre rmianM.a ced19o7 )7t,h outghhe eixra gceto chronhoalysoe tgtoy
bec onstraIinna endy. ctahsieis,n trapmlaagtmea tism
represae snmtaslv lo lumoefi ntrumdaegdm aP.r evious
stiudesw,hi cfhoc useodnt hPee rmo-Carbomnaigf­erous
matisfmro cme ntSrpaali n (peetar 1i2.n0 i0) 4a nd tohne
Hercynainadpn o sHte-rcynbiaasnri occ okfst hSeC S(B ea
eta 11.9 99h)a,v aed vocaat leidt hospohreirgfiiocntr h e
mantsloeu rcoefts h e SaClSk allianmep roepshO.yt rher
studhiaevsre e veatlheapdta rotft hSeC SP ermiaalnk aline
basic instrhuosawin oi nsso topidcepallelctyoe mdp onent,
indicaotfigr veea theert erogetnheapinrt eyv iosuusgl­y
gestaenddt hei nvomlevneto fs ub-lithossopuhrecreisc
(Vlialseectaa 1 2.0 0;4O reajnae ta 12.0 0)5.
Theg eodynasmeitctp irnogp ofsoetrdh edsyek sew arms
isa lstoh es ubejcto fd ebatSeo.m e autlhiontrkhs e ir
generattioo mna nifestaotfiP oenrsm o-Carboniferous
magmatirseml attote dhi em pingeomfe nmata ntplleu me consiosfst esv egrraaln ibtoidcie emsp laciendtPo a laeo­
pritootr h e opoeftn hiAent gl anOtcieca(D no bleatas 1 1.9 9;8 zoitcoN eoproteroorztohiocg neaindsm seetsa sediments.
Perientai l2 .0 04)w,h ereoatsh ecrosn sitdheart riinttt hiinsgT hefi rsmta nifestoaftt ihoignsr animtaeg matihsams
regicoonu rleds ufrlotml ithostphhienrneai nndag d iabatbiece nd ateadt 3 46 ±M a6 3 (Villeatsa e1c.1a 9 9a8),
upwelloiftn hghe o ats phenos(pOhraeenrjeaet a 12.0 0)6. approxim5a0t eMlaayft etrh eb eginnoiftn hge H ercy­
In thisst udwyep resneenwtd atian,c lumdaijnogr annida cno lli(s4i0o8n- M3a8;7G utieMrarerzce ota 11.9 90).
traeclee memnitn eral analysceosm,p obsuiltki-ornIno vcaoknl du mtee rmtsh em ositm portpalnutt ownesr eem ­
isotroaptei( oSsr -NPdb-)w,h icahl luoswt oe lucitdhaet ep lacientd h re ang3e2 3-2M8a4 (Villeatas 1e1.9c 9a8b ;
petrogeonfte hseiassle k aldiynkeeT sh.e nseawm psleet Beae ta 11.9 9;9 Zeck 2e0t70) .Tah 1e.S CSH ercynian
covetrhswe h oloeu tcroprpeigniogofe n v edryy ke swargrma,n itoairdems a inlpye ralumifneolusvsia cr iedtiise­s
andc onsideernalbalrytg hipenr ge vioauvsaliyl aanballey ­playiann ga rrcoowm positriaonngaaenl,dw hicdhon ot
ticadla tasPeatr.t iceumlpahra siissp laceodn the shoawn ym arkecdo mposittiroennadl with time (Villas­
heterogeonfte himeta yn tsloeu rces, threo lopefo sesciaab nldHe e rre2r0o0s0 ).
crusctoamlp oneanntds t ohnne a tuorfae n mye tasomatisiHnegr cynbiaasnii nct rusiinto hnSesC Sa rveo lumetrically
agenFtusr.t hoerrewm,ea lso dtihsseci ugnsisfi coafnt chee smaalnld oacscs umra glalb brtooqi uca rtz-dmiaosrsietsi.c
geochernidcieafrlfe ntcheaset x iisntt h wei despPreeramd­ Agesr angfer om3 22± 5Ma (Rb-wShro le-rock iso­
iabna smiacg matism deavtte hleeon pdoe ftd h Hee rcyniacnh roCna;s ileltaa 1s1.9 91)t o3 06± 2Ma (SlMSU -Pb
orogeinny north-awnedss otuetrhn- weEsutreornp e. dationfgz i rcon;e taZ 1e2.c0 k0) 7.B aseodn t hegiero ­
chemisttrhyer soec ks bheaevlnie n kteocd r usrteacly cling
int hmea ntolrem eltionfg s au budction-momdainfitelde
Geologisceatlt ing sour(cVei llaestae 1c2.a0 0)4.In addittioto hne msien or
basiincut srivtehsSe, C Si sc rossb-yca un tu mbeorfd if­
TheS CS liosc awtietdh tihnCe e ntral-ZIobneoerf it ahne ferepnots t-colldiyskies ownaarlm(F si g1.) :( 1E)- W
IberiMaans si(fF i1g)..T hiiss laa rge batholoirtihe ncttaheladct - almkiaclriondei (o2r9i±0t 1e s0M a,R b-Sr
Fig.1 Schemamtaipcs howing
:....,='�=-'iIO Kill
the Penamlakna line
BeTlluy
lamprophaynrde sd iafbraosme s
Salif/em
theS CSt,o getwhietroh t her
pos-tc ollimsaigomnaatilc
intrusoifco anlsc -alaknadl ine
tholeiaiftfiinciT tyh.en ameosf
thne indey ke swarms sampled
int hisst udy inadriec aitne d
italics 1'illufQro
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isochGraolni;ne dtao 1 1.9 9)4,( 2s)h oshomniictriocs­ iotnu> 13[l0lIl thipcokl issheecdtbi yol nassa ebrl ation
gabbarno(ds3 ,N) - So rientedd yakleTksha.fiel r itsnwteo (LA-ICP-aMttS h)U en iverosfBi rtiys utsoilan VgG
setasra es socwiiattcheo de vgarla npiotrep hyTrhieesseE. l emenPtlaals maQ3u IaCdP -McSo uplteoad VG
thrdeyek sew arsme thsa vbee ecnl assbiyVfi ieldl asLeacsae rPIrIo( b26en6 m frequency-quNadYd-ArGu pled
eta 1(2.0 04)i nttohf eo llowing Ggrbo2Gu,bp 3ia nngds l,a seEra)ca.hn alcyosnissi osf1t 0es0do fc ounttiinmge
Gb4,r espectTihveGe bllgry o.u pw asa ssignteotd h e (incl4u0ds oi fnb ga ckgrmoeuansdu reumseinantl g)a ,s er
previmoeunstliyHo enrecdy gnaibabnrt ooqi uca rtz-dbieoarwmii ttiahdc i ameotfae rro u2n0[ld lIl .N IS6T1 0g lass
massTehsel. a msatg maetviecrn etc oridnte hdSe C Si s wasu sefdo irn strument acnadNl IiSbTr aw6ta1is2o n,
represbeytn htieen dt ruosfti holena rggaeb brMoeiscs eu­seads seac onsdtaarny(d raersdau rlseth so winne Table
jana-Plasencdiyak( en tahmoGelbde5 bi yiV tiilcl as1e)cE.aa cahn alwyassin so rmaltioCs ae( dc linopyroxene,
eta1 2.0 0)4d,a taet2d0 ±3 2M a( Ar-Ari nb iotDiutnen; a mphibaoplaet,oi rtS ei() f eldspphalrosg,ou psiitneg) ,
eta1 1.9 9)8w,h iicshl inkteotd ho ep enoifnt ghA et lantciocn centrdaettieornmbsiy en leedc mtircorno probe.
Ocean. Fourtneeewwn h orloec ska mpwleersae n alyastte hde
Thea lkasluiin(teGe b4 g roumpa)yb ef urtshuebrd iC­NRS-CRNPaGn cfyow rh olreo cmka jaonrtd r aeclee ­
videidn t(ol:b )a stiocu ltrabasic alnadm pmreonpthasyd,rd eitsno gt hee xistsienvged ny kaen alyses
diabaasned(s 2,m) o nzogabtbosr yoeincpi otripch yr(iVeisl.l eatas 1e2.0c 04a; O rejeatna 1a2.0 0)6.T hes amples
Them osrte cegneotc hrondoaltooagb itcaaiflnot erhd e sew erfeu suesdi LnigB 20a nddi ssowlivtHehNd 0 3S.o lu­
rockgsi vUep per Peirnrntiraunas gievbsee tweetni ownesra en alybsyie ndd uctciovuepplllyea ds amtao mic
264 ± 1M a (Ar-Ar on amphfriobmol laem propheymries ssipoenc tro(ImCePt-rAyEf So)mr a joerl ements,
dykePse;r ientai 1 2.0 0;4 Scarroaw1 2.0 e0t)6 and whiltsrtae clee mehnatvbsee edne termbiyIn CePmd a ss
252± 3M a( U-Pobnz ircfroonma s yenpiotripch yrsyp;e ctro(ImCePt-rMySU )n.cr etaiinntm iaejseo lre ments
FernanSdueazr eaz1 2.0e 0t)6 .T hel ampropchayrrreyrs a nfrgoem 1 to3 %, excMenpOt( i5n-g1 0a%n)Pd2 0,
xenocraynsdtrn se gacry(smtasi ncllyi nopyro(x>e1n0eC%,a) r.i gentaa 1(n2.0 01) haevvea lutahtpeer de ci­
amphibaonldpe l agiocalndaa slesx)oe, n oltihtaahtrs e sioonfN ancIyC P-aMnSa laytls oecwso ncentration levels
relataibvlelllyi1 nsd oamnoetu tcrTohpels a.tt cearbn e fromr epeaatnealdoy fst ihisen ternsattainodnBaaRrl,d s
broasdulbyd iviindtgeord a nualniudtl etr amxaefinco litDhRs-.N , UABN--NaG,n G dH .T hper ecifsoRirbo S,nr Z,r ,
Mosotft hSeC Sg ranuhlaivbteee esin n terapsrl eotweedrY ,V ,G aH,f a nmdo sotft hReE Ei si nt hrea n1g-e5 %,
crusrteasltf iotremsae std h ree soufle tx traocftt ihoen w hereas tfrhoemy5 tro1a 0n%fg oetr h ree osftt race
granmietlewt hsi lcehtd ot hfeo rmaotfti hoSenC Sb ath­elemeinntcsl,uT dmi.An nga lyosfBe Rs( ainn dependent
oli(tVhi lleatas 1e1.c9 a9) 9M.a fitco u ltraxmeanfiocl itshtsa,n daarrsedh )o winne Tab1l.e
ont hceo ntradreye,pp y arroex ecnuimtuiltca htacertsy s­Pbi sotroaptehi aovsbe e edne termoinsn eevdle anm ­
talldiisreedfrc otmlP ye rmiaalnk ablaisnmieac g maosr prophaynrdde isa baasnedts w oh ornblexnedniotliict hs
melrtesl attoHe edr cycnailacn- amlakfiaucln idneer pla(tpirnegv iaonuasllyfyso eSrdr -Nids otroapteiV oisl;l aseca
even(tOsr ejeatan1 2a.0 0)6. eta 12.0 40;O rejeatan 1a2. 0 0)a6 tt hLea boraotfIo sroy­
topGee oloogfyt heN aturHails toMruys euomf
StockhTohlemss.ea mpwleersde i ssoulsvieand 1g 0 1:
Analyticmale thods mixtoufHr Fea nHdN 03a ccortdori onugt pirnoec edures
oft hlea borPabtw oarssye .p arfraotmte hdse a mpulseisn g
Them ajoerl emceonmtp osoiftm iionne rfraolmSs C S elemsepnetc iiofinc- excchoalnugmTenh ses. a mpwleerse
205
alkallaimnper opahndydri easbw aesredese termaittn heed s pikweidta h Pbt rascoelru otfki noonw cno ncentration
CentdreaM icrascEalpercGt ro"nLiucias (BCraum"p lut­od etertmhilene eac do ncentrIastoitrooanptsewi. eo rse
tentUsnei verosfMi atyd riud)s ianJ ge oJlZ A-8M9 00m easuurseidanF gi nniMgAaT2n 6 m1u lticoTlIMlSe ctor
electmriocnr opwriotbfheo uwra velednigstphe rsiinsv team toidceE .m pirmiecaaslu reomfme anstfssr action­
spectroAmcecteelresrv.ao lttiwanaggs1e 5 k Va ndt he atiaosn f au ncotfit oenm perwaetreuesr tea bluissihnegd
elecbteraocmnu rr2e0nn At, w itah b eadmi ameotfe trh ien ternaPtbii osnoatlo pe NsBtSa9 n8d1aa nrdNd BsS
5[l lIl.E lemewnetrcseo unftoe1rd0s o nt hpee aakn 5d s9 82. Datuan kfnrosowamnm plwehse,nc orreicnt ed
one acohft wob ackgrpoousnidt Siiolnlsi.m aalnbiittaeen,,a nalowgaoyua,sr ree prodauncdai cbcluer waitthei n
almandkianeer,s umtiictreo,ci llimneenfl,iu toer,a pa0t.i%t1 (e T,a b4)l aen da nalyosfeB sC Rl- gavree sults
scapoNliai ltleco,ry o,m giathen,bi etnet,o annisdtt er one­0P6bF4Pob 18.27079P,b20'1 /pb 15.26803P,b F4Pob
= = =
tianmiitnees rtaaln dwaerredems p loCyoerdr.e cwteiroen3 s8 .7i4na) g reewmietnlhti tervaatluuere°es" p4bPFbo
=
2 2 280 2
madues itnhgZe A Pm ethod. 18.8071P,b0'1 /pb 15.62P,b0'1 /pb 38.70).
= =
Traeclee mceonmtp osi(RtEiEo,Bn asR, b P,b T,h U,, We arael sroe poSrrt- Nids otdoaptifaco trw on ew
Nb,T aS,r Z,r H,f Y,,C rN,i V, a nSdc w)e rdee termiinn leadm propshaymrpelT ehse.sw ee rdee termaitnt ehde
SouthamOpcteoann ogCreanptruhesy,i nVgG S ae c5t4o rc linopykraoxeernseub,ti iottiet,e -pThil-omgaogpniet­e,
multi-cToIMlSlw eicttdhoa rta ac quiirnme udl tidyntaimtiec- ulvoolsipvii(nnneeol r,m aplsleyu domorphosed),
modIes.o troaptioicfSo ras n Ndd w ermee asuornae s du b­plagioacnldaa lskefa ellid swpiatlrhe; s saemro unotfs
sampolfwe h olreo cpko wdReerp.e aatneadl oyfsN iBsS apataintael,cc ailtceFi,et -es,u lpbhairdiietlsme,e, an nidt e
87 86
987g aveS r/Sr 0.74150± 2 06 (2aa)n dt he monazTihteesc.er ysatraeelu sh edtrosa ulb hewdirtahl ,
134Nd1/4N4d ratio= of theJ M Nd standwaarsd theex cepotfai loknfa ellid scpaalrcai,nat den alwchiitceh,
0.15815±6 0 5( 2a). arues uailnltye rstitial.
Theaslek arloicnskehs o dwi ffeorceeanlntlvd ie sicles
type(s1f:)e lds(p2ac)ta ircb,o annad(t 3icc)h lorite-rich
Petrography (wiatchi ccullianro pyrFoexlednseop)ca.et( lislcyi e nitic)
arei rregoursl eamri roucnodnesdi,so tfki anegr sutite,
TheS CSa lkallaimnper opahnyddr ieasb adsiesspa l abyi otaintadel kfaellid lsaptaohrcs c,a sisohnoawlialnnyg
heterogpeonrepohuystr eixttiwucir teah b undrnaanfitc inncearl citeg/laonbaCulalcreib.to eno acteilclsi i mairlea r
phenoc(rciy1nsotpsy rokxaeenres,uo tliitvpeis,ne eu dot­ot hecsael cgiltoeb uwlietmshi, n oarm ounotffs e ldspar
morpphhsl,o gouplivtoes,pN ienveelr)t.ht ehrleee lsast,ia vnedc hlorCihtleo.r itvee-sriaicrcloeheu st lbinyse mda ll
abundaanncdde i striobftu hteimsoienn ervaalrsis eisg ­clinopycrroyxsettnhaeaol tcs c ausrp rismlaattiThchs e.
nificafrnotmol nyde y kteoa notFhoelrl.o twhicenr gi teirninaze orno eft heoscee slhloicw hsl ocrailtceai,lt beai,ntd e
ofL eM aitertae 1( 2. 00)w2 ec acnl astshiSefyC Sl am­minobra riTtheik.si nodfo cealrlteiy piocfaa llk aline
prophdyyrki(ecls e aavsiinddgie a baassce asm)p toniltaemsp,r opahnydr ieansrt ee rparsve otleaedtx isloel autt ion
duet ot haeb lll1odfca 1nniocpey roaxrnepnhei,ba onlde s halelmopwl acelmeev(neRtlo s1c 9k91 ).
phlogopphietneo carbyssetonsfcf, ee lpshiecn ocrystsM osaotnft d h SeC Sa lkadlyiknaeers re e markfraebslhy.
predomionfpa lnacgei oocvleaarls kea li wfietlhtdihsnep Aalrt eroaftt ihsoean m pilsem sa inrleys trtiopc steeudd o­
groundNmoag slsah.sa sbs e efno und. morphoeldi v(ibntyea lacl)t,h otuhgsihes c ondary process
Mafic daylksecosa rdreye p-crymsetgaalclriysisesltd is k teolb yed uet oa utometasdoumraivtnoigls amt ile
(clinopyroxenaen,dp laamgpihoicwblhoailscaeehr ) e, e xsoluTthiuoisnti,. s l iktehlayats elecltoiPwv -lea te­
moraeb undiantn htde i abdayskee s,x eannodlo ift hmsa gmatic aolfst uesrpaetnsidooelndi( dxse noalnidt hs
distipnrcotvievne(a wnaclel -lroowccerkru, s grtaanlu litpehse nocorcycsutrdsur)re idln agm propmhaygrmdiaec v ola­
andp yroxexneintoelfr iotmht sh uep pemra ntle-ltoiwleirz atioann Vd(i Olrlea2js0ae0)nc8.aa
crubsotu nda(rVyi)l leatsa e1c1.9a 9 ;9O rejaentaa 1 .
200)6.
Phenocdroyn sotutss uaelxlcye 3em dm andv ariyn Mineralc hemistry
thetiort maold uep t o4 0%i ns amp1l0e83 11C.l ino­
pyroxaenndke a ersaurtneio trem azlolnyet dh,fe o rmeCrl inopyroxene
sometismheosw ing mruilmatsni dop slcei llzoantionrgy
(Orejeatan 12a.0 07).T hey eaurhee dtrosa ulb hebdurta lTh,e m ajoerl emceonmtp osoItIOfnr epresentative clino­
maye xhisbpiotni gnyn zeorn iensfi ltbryga rtoeudn drnaspsy.r oxfreonmeS sC Sa lkablaisndieyc k iesss u mmariinz ed
Freoslhi vhianosen lbye eonb serivnoe ndde i abdayskee ,T ab1l (es etehw eh oldea toane Table 2a)r.Te i ­They
wheroelaisv pisneeu domowrhpihcashr,m e a intlrya nsd­iopsoirTd ie-sa ufgoiltleostw,hi cenr gi toefMr oirai moto
formteodt algcr oumpi neraarlceso ,m moinnm oste ta 1(.1 98)8.M atrcilxi nopyirsso ixmeinilenma arj or
lampropahnyddr ieasb aPsleasg.i opchleansoec arryes etlse mceonmtp ostiotp ihoenn ocrbyusdtti ss,pl loawye r
onlpyr esiennd ti abdayskee wsh,i cahl sooc casionMagl#vl ayl u(e0s. 60-(F0i.g28).1. C) l inopyyrioexlaed nse
contmaaifincp henocrIynas atnsa.l ogfoaussht ioo nh eterogceonmepooussci htairoanc tehriigTzhie 0ad2n db y
plagiopchllaosgeop,ph ietneo carryneso tptsr esienan ltl A h03c oncent(ruatpto i5 o.n7s 1a1n.dw4 t %r,e spec­
dykebsu,at r ree strtiosc otmeKed- rilcahm prophytirveesNl.a2y 0) c.o ntreanntgf erso0 m. 3t3o1 .1w0t %a nd
Twod istinscptiinpvehele nocarryesf tosu nbdl:a ckC r203m ayr eaucpht o0 .w9t %N.o rmzaoln iinsrg e la­
ulvospwihniectlhr, a ntsoiT tis- magnaentdCi rt-er,i tcihv ceolmym oinnt hpeh enocarnyidstg t isv,te rse nodfs
browsnp inmeilc rophenOotchrpeyhrse tnso.cf royusntdis n creFaesA,iI Tn,iga nCda c oncentarnaddte icornesa sing
inv ariaqbulaen tiatriee si lmeniatned,F e­aMpga#tS,ii ta en Cd rfr omc orteor i(mO rejeatan 12a.0 0)7.
sulphides. Clinopyprhoexneoncer yshtisg cheo xnhciebnitotrf a tions
Thger oundrniasts ysp ichaollloyc rywsittaafihl n lei­nmeo,s ttr aeclee me(netTsa3 b)lR:eE E( 48-p1p2m0L) lL,E
graiinneedq uigtreaxnt(uuglrraesar ii znre asn gfirno1gm0 (Rb 0.6-p5p.m9B; a 1.5-p3p.ma6)n HdF S(ET h
= = =
to8 00[l lI1)a,l though traicsfh oyutniidncs omtee 0xt.u1r-pe0p .m4;T a= 0.1-p0p.m7;Nb = 0.5-p1p.m6;
samplTehsem. a imni nerfaoluisnn dt hger oundrnaarses Z r 43-1p5p3m )T.h eyd isplcaoyn veuxp ward
=
TableR epr1e sentatimvaej oerl emencto mpositioofn clinopyraonxdae mnpeh ibofrloem SCS alkalilnaem prophyarnedsd iabases
Mineral Clinopyroxene Amphibole
Type Phenocrysts Matrix Phenocrysts Matrix Ocelli
Sampl#e 10212190 3474 101308318111 10 3473 1034731 021104178A9 2 108404301318 0 33331B0 347130 347130 3473 1018921 041400334 73U 13074 534A 104551
31 9 60 62 91 92 150 79 329 8 999 2110 4 145 125 3251 3146
core core core ,im core ,in; core core core ,im core
Si02 45.974 5.484 8.094 3.904 6.914 5.754 4.625 0.27 44.413 8.3389 .27 38.633 9.013 8.373 9.383 8.503 7.123 8.243 8.32 40.88
Ti02 3.532 .51 1.43 3.98 2.50 2.62 4.40 1.50 3.076 .50 5.29 6.09 6.32 6.13 5.35 6.74 7.89 3.56 6.03 3.33
Ah03 7.288 .32 5.55 7.56 8.42 8.87 7.19 2.45 9.67 141.31.92 2 13.781 3.871 3.841 1.331 2.871 3.771 4.061 3.06 9.20
FeOa 7.905 .49 4.76 6.29 4.62 6.61 9.101 0.32 7.101 1.1181 .03 11.629 .111 0.071 6.56 9.48 9.331 8.9172 .68 23.37
Cr203 0.000 .Q7 0.20 0.18 0.05 0.Q4 0.00 0.02 0.170 .00 0.00 0.00 om 0.05 0.00 0.00 0.00 0.00 0.00 0.00
MnO 0.Q70 .06 0.09 0.13 0.08 om 0.14 0.20 0.13 0.02.60 8 0.05 om 0.Q7 0.21 0.11 0.16 0.35 0.28 0.42
MgO 11.171 3.291 5.401 2.661 3.661 2.801 1.101 1.68 12.45 1121..5709 11.531 3.161 2.319 .041 2.991 2.43 7.461 1.04 5.06
CaO 22.822 2.832 2.6424 .02 22.282 2.132 2.202 2.09 23.16 1111.6.17 4 11.831 2.251 1.921 1.371 2.111 3.451 1.261 1.93 11.13
Na20 0.570 .68 0.61 0.38 0.67 0.77 0.58 0.55 0.75 2.072 .06 1.82 1.83 2.03 2.85 2.09 1.95 2.43 2.49 2.71
K,O 0.000 .00 0.00 0.00 om 0.00 0.02 om 0.00 2.071 .93 2.26 2.24 2.10 0.87 1.66 1.52 1.68 1.65 1.65
Total 99.319 8.729 8.779 9.109 9.209 9.609 9.359 9.09 100.9918 .7966 .41 97.619 7.819 6.899 6.969 6.559 7.629 8.019 7.48 97.75
Mg# 0.720 .81 0.85 0.80 0.84 0.78 0.69 0.67 0.76 0.670 .66 0.64 0.72 0.69 0.49 0.71 0.70 0.41 0.61 0.28
Cationcsa lculaotnet dh eb asiosf 6 °fo rc linopyroaxnedn24 e (0, OH, Fa)m pfhoirb ole
Si 1.7314. 693 1.7761 .6461 .7341 .6941 .6901 .910 1.6285 .6585 .958 5.8135 .8065 .7906 .0775 .8125 .6285 .8655 .824 6.508
Ti 0.100 0.00.7004 00 .1120 .0700 .0730 .1250 .043 0.0850 .7210 .604 0.6890 .7070 .6960 .6210 .7650 .9000 .4110 .689 0.399
AI 0.323 0.03.62451 0.3340 .3660 .3870 .3210 .110 0.4172 .4632 .362 2.4422 .4312 .4592 .0582 .2882 .4592 .5402 .338 1.724
Fe 0.2490 .1710 .1470 .1970 .1430 .2040 .2880 .328 0.2181 .3791 .400 1.4621 .1341 .2712 .1371 .1971 .1832 .4331 .612 3.111
C, 0.000 0.00.0020 60 .0050 .0010 .0010 .0000 .001 0.005 00..000000 0.0000 .0010 .0060 .0000 .0000 .0000 .0000 .000 0.000
Mn 0.002 0.00.0020 30 .0040 .0030 .0000 .0040 .006 0.004 00..003120 0.0060 .0010 .0090 .0270 .0140 .0210 .0450 .036 0.057
Mg 0.6208. 7380 .8480 .7080 .7530 .7070 .6270 .662 0.6802 .7427. 667 2.5872 .9202 .7692 .0802 .9232 .8101 .7062 .501 1.201
Ca 0.9202. 9110 .8960 .9650 .8820 .8780 .9010 .899 0.910 1.1.893048 1.9071 .9531 .9271 .8801 .9592 .1851 .8501 .943 1.898
Na 0.042 0.00.4094 40 .0280 .0480 .0550 .0430 .040 0.0530. 5910 .606 0.5310 .5280 .5940 .8520 .6120 .5730 .7230 .733 0.837
K 0.000 0.00.0000 00 .0000 .0000 .0000 .0010 .001 0.000 00..338794 0.4340 .4250 .4040 .1710 .3200 .2940 .3290 .320 0.335
Cationssu m. 4.000 4.40.0010 23 .999 4.000 4.30.09049 .90 00 4.00105 .81145 .8891 5.87115 .906 1155..9920513 5 .890 16.053 15.902 15.996 16.070
a TotaFle e xpressaesdF eO
{_
Fig.2 Majoarn dtr aceel ement 8, core 1.5
composiotifco 1ni nopyroxene Phenocry.s ts
onn1
frotmh eS CSa lkalbiansei c Ti02 Matri+x Nap
dykeTsh.en ormalising values
6
ofc hondraintdpe r imitive
mantalree aSfutne ra nd ++
McDonou(g1h9 )8a 9nd
McDonouagnhdS un( 19)9,5 4 +
respectively
0.5
2
0
0.6 0.7 0.8
Mg# Mg#
IC px/chondrite
102
10'
100���-L�-L�������� IO·��'����-L��-L��-L�
La Pr SrOnd Dy ErY b Rb K UT aC eP rN d ZrE uT b Yb
Ce Nd Eu Tb HoT m Lu BaT h NbL aP b Sr SHmf Ti Y Lu
chondrite-RnEoErp maatlti(esFrein2d)gs ..s imiltaor l(y> 1.p1p5m0c) o ncenttrhaiitssi o nrse.fli enpc otseidt ive
clinopyrcorxyesnteaasltd l eipzfrteohdm b asaltica nmoemlatflsoi treh se eslee meinnpt rsi mimtainvtel e-norma­
(lrvinagn dF re19y8 )4.N egatBiavK.e. Nb . Pba ndSr lispeadt terns.
anomamlaiybe es fOlll1idnt hepirri mimtainvtel e-norma­
listreadce el ement patterns. Olivine
Freoslhi viison nelp yr esienan s tc agrrcoeo ufpd iabases
Arnphibole
(boatsph h enocarnywdsi ttsht ihgner oundrnaNsesv)e.r ­
theless. thoef p saebuudnodmaionnrcm peoh ssSt C S
Them ajeolre mceonmtp osoiftr ieopnr eseanmtpahtii­ve
alkadlyiknheeis g hliitgpsho ttse nitmipaolr tdaunrcien g
bolfreosm S CSa lkablaisndieyc k eisss ummariinz ed
crysfrtaaclt ionFaotrisotcneo.rn itvteaenr tfi reosFm 0 7t7o
Tab1l (e seteh weh oldea toan e Tab4l)eT. h eayr e
Fo90i np henoc(riynsctlsu sdliinggFh etl-yrr iicmhs )
classaiskfi aeedr suatcictoretdsoLi enagke eta 1(.1 997).
(eaTb l5e)T .h ese valtuheMesg /mFaet corhfac tliions­
Thearnspeh iboalreAesI -Ti-wriitAchl2h0 .3u pt o1 4.8
opyropxheenneo c(r0y.s6t7s- i0n.d8i8c)ea.qt uiinlgi brium
wt%a nTdi 20u pt o7 .w7t %(F ig3).P. h enocsrhyosawt s
crystalOlliizvaMitgni#ceo o nr.r eploastietwsii vtNehil Oy
homogenceoomupso siwtiitMhog n#i. n t hrea n0g.e6 1-
cont(e0n.t0 5-0.(2e8F 1iw)gMt..a% t)r oilxi vcionmep o­
0.7M2a.t rarnipxh iboolveesrp lhaepn occroymsptoss ition.
sitioovnesr ltahposos fep henocrbyusttth see,yx tend
bugte nerhaalvmleoy r eev olcvoemdp osirteisoenmsb ling
thmea jeolre mceonmtp osoiftarn ipohni bfroloemf eldst­owalrodwsMe gr(F 057-F8o3)a nNdi O( 0.0.51-w30t %)
concentrations.
patiocc el(Fliig 3).. Arnphiboltrea cee lement
composi(teiToa3nb)slm ei mitch oosfec oexicsltiinn­g
opyropxheenneo cwriytcshht asr,a ctceornivuseptxw iacr :Md icas
chondrite-RnEoErp maatlt(Fieisrnges3).d . N evertheless
thesyh oaws liegnhrti chimnme onstttr aeclee mewnittshT hecyo nstaih teutteer oggernoeruoapun sg frionmgT i­
respteocc tl inopyrTohxeehyna evh.ei gBha ( 537-biottiotT ei -phlowghoopsimeta ei,cn h aractiesr istic
82p6 pm)Nb .( 40-p1p2m6)T .a( 2.3p-p5m.a)6n dS r higThi 0(2u tpo 1 0.w5t %a)n Adl 203( utpo 1 7.w8t %)
{core.
Fig.3 Majoarn trda ceel ement 9 Phenoerysts 4
composiotifao mnp hibforloem TiO, ri+<>m Na,OI
thSeC Sa lkalbiansdeiy ck es. � Matrix +
8 OeelliO �
Then onnalviasliunoegfs ++
chondraintdpe r imimtainvtel e
araef tSeurna nMd cDonough 7 + & 3 0 ++
cP 0
(19)8a 9nMdc Donough and 6 +O� 0,.0 +
Sun( 9195),r espectively
+
5 .-+ 2
4 0 +
+
0
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Mg# Mg#
Amph/cnhdorite iti1v e
10'
10'
10'
10'
10"
10��-L-L�L"-��-L-L���
La Pr Sm Gd Dy Er Yb Rb Th Nb La Pr Nd ZEru Tb Yb
Ce Nd Eu Tb Ho Tm Lu Ba U Ta Ce SrS rn Hf Ti Y Lu
(eFigT.a b21l a;en de Tab6l)eS. i mitloaarn rp hibolzeo,n ewdi tcho rceo mposiotfAi no61n7-0s a ndr imosf
micpah enoc(rwyhsiatcrshme a inplhyl ogodpiistpelsAa)ny , 96-2( eF2i)g..
higMhg #v alu(e0s. 65-a0n.dm7 a8j)oe rl emecnotn ­
centrastiimoitnlosta hro osfegr oundrnamsisc awsi,t hO thmeirn erals
theex cepotfiM og#nw, h icmha yb e laoswa s0 .2i8n
them atrriexs,e mbcloimnpgo siotfbi ioont iftreosmS pinceolm posiatrsieho onwsi nne Tab5l.Pe h enocrysts
feldsopcaet(lielcFi i 1g)T..h emya ya lshoa vhei gFh arTei -magnetitea-nCudrl -vsopsTiphnifieenr 1egs.lrt o up
concentra(tuipto on3 s. 4%P)h.l ogopphietneo criyssm tosra eb undaannddti spalr aeylsa thievteelryo geneous
exhihbiigttrh a ceel emecnotn centr(aeatTbi l3oen) s,c omposwiittFiheo O+n Fe203= 52-7wt6% a nTdi 0i2n
notaBbal( y3 ,000-p6p,m0)R0,b(0 2 80-p3p6m0)Nb , threa ng1e2 -3w6t %w,h ilAsl20t3 a ndM gOd on ot
(15-p5p0m a)n dT a( 0.9p-p2m.)T2.h esceo mpositeixocne9sea dn 3dw t%r,e spec(teiFv3ie)gCl..ry - spairnee ls
arvee rsyi mitlota hro osfep hlogopphietneo cfrryosmte su hedral aonvde raglrbwoyuaw lynvs o srpiimnTseh.le ir
othaelrk allarnipnreo ph(yFroe1sea y11 .9e 9)t6( eF1i)g..C r203a nAdl2 03c oncentrraantfgireoo 1nm0st o3 8w t%
anfrdo m2 8t o5 2w t%r,e specAt nievgealtyci.ov rer ela­
Feldspars tion beextiwsAetlesa n n Cdr (M g)c onteGnrtosu.n drnass
spinaerrlees s trtioTc it-emda gnetites-euralinvedos s pinel
Thmea jeolre mceonmtp osoifrt eiporne sefnetladtsipvoaevr esr tlhacepo mposifiteiloodfnu allv ospphienneolc rysts,
(plagiaoncadll aksfaeelsli d sipnSa CrSa) l kadlyiknieess althotuhgethye ntdo wasrldisg Fhet-leyn rciocmhpeods i­
summariinze eTda b7l.eP henocarryes tse xclutsiio(vneesFl 3iy)g ..
plagio(cfrloamsa ensd estionl ea bradAonr23-iAtn0e7 , Apatmiatyae p peaaspr h enocorrwy istthtsih mnea trix.
(eF2i)ga).n adr ree strtiodc itaebdda yskeeT sh.ec ompo­Thipsh aissae l waFy-sr (i1c.h4 w-t2%.()7e Ta5b)a lneid s
sitifioenlaodlf g roundrnfaeslsd sipsaw risd ewri,t hc lassaisflfi ueodr apCaldt oietnseo e.tx ce0e.dw5t %a nd
plagioocvlearsleatsph ppehi enngo crraynsbgtuepst,l ottiSnrgOr angfreosm0 .0t1o0 .3w5t %I.l meinsri etset rtioc ted
towards maonroder tahlobciltcaeos mep-orsiicathnid o tnhsSe,a Bna rtodel oPmien adryekasen idit sc haracterized
alkfaellid fsaplalrw iintght ihnse a nidcionmep ositbiyoh niaglMh g O( 0.02w-t1%0a) n dMn O (0.5w-t1%0)
fiel(dO r-'0r)I.P lagiopchleansoec arryuess tusa l(leyT a5b)lM.eg -Mn-rich hialvbmeee epnnri otpeoss ed by
4 00
TablRee p2r esenmtaajtoeirlv eem ecnotm posiotfmi iocnaa sn do livfirnoeSm C Sa lkallianmep ropahnydrde isa bases
Mineral Mica Olivine
Type Phenocrysts Matrix Ocelli Phenocrysts Matrix
Sample 80318-lD3474- lD36l8D43-473-lD1892-lD3811- lD21102495-51l-D1892Al-D1892A- lD18l9D24A8-67l-D1892-lD1892-
53 25 107 123 138 67 37 11 60 62 68 57 119 129
core rim core core
Si02 35.773 4.82 355.1 36.91 34.lD 34.73 34.77 35.96 40.34 403.1 38.80 38.78 37.62 38.47
Ti02 8.85 8.66 7.65 6.68 7.64 8.48 8.19 4.54 0.00 0.03 0.05 0.02 0.03 0.01
A1203 165.1 160.5 144.8 15.12 13.48 156.5 140.0 126.5 0.08 0.15 0.05 0.07 0.01 0.04
Cr203 O.lD 0.03 0.00 01.3 0.00 0.03 0.00 0.02 NA NA NA NA NA NA
FeOa 8.98 9.66 110.5 12.03 24.00 lD5.1 181.4 23.55 9.99 181.2 20.05 12.96 25.36 17.94
NiO NA NA NA NA NA NA NA NA 0.28 0.09 0.06 0.28 0.00 0.11
MnO 0.01 00.4 0.12 0.01 0.22 0.04 0.09 01.7 0.28 0.39 0.42 0.20 0.26 0.22
MgO 169.3 151.4 154.5 14.71 5.88 148.7 9.80 9.09 49.20 39.99 41.25 46.54 36.44 41.61
CaO 0.00 0.25 0.04 0.05 0.02 O.lD 0.03 0.07 0.30 0.24 0.25 0.28 01.6 01.4
NA20 0.42 0.65 0.55 0.69 0.52 0.53 0.78 0.45 0.00 0.04 0.03 0.00 0.03 0.02
K20 9.57 8.21 8.75 9.47 8.46 8.39 8.29 8.81 0.02 0.00 0.00 0.00 0.00 0.01
BaO 0.00 0.69 1.34 01.9 0.00 12.9 0.00 0.03 NA NA NA NA NA NA
F NA 0.00 0.49 1.28 NA 0.36 NA 01.7 NA NA NA NA NA NA
Total 97.149 4.20 95.43 97.27 94.32 94.98 94.09 95.51 lD0.49 99.36 lDO9.6 99.13 999.1 98.56
Mg# 0.77 0.74 0.71 0.68 0.30 0.72 0.49 0.41 0.90 0.80 0.79 0.87 0.72 0.81
Catiocanlsc uloantt heed boaf2s 4i( s0 ,O H,F ,C l) for m4i0 c fao oral nidvi ne
Si 5.3605 4.00 5.550 56.70 56.60 5.420 5.6lD 5.880 0.988 1.031 0.990 09.78 09.95 09.96
Ti 1.0001 0.lD 0.900 07.70 09.50 1.000 0.990 0.560 0.000 0.001 0.001 00.00 0.001 00.00
AI 2.9152 9.34 2.665 27.38 26.37 2.876 2.660 2.436 0.002 0.005 0.002 00.02 00.00 0.001
Cr O.OlD0 0.00 0.000 00.20 00.00 0.000 0.000 0.000 0.000 0.000 0.000 00.00 00.00 00.00
Fe 1.1301 2.50 1.440 15.50 33.30 1.370 2.450 3.220 0.205 0.388 0.428 02.73 0.561 03.88
Ni 0.0000 0.00 0.000 00.00 00.00 0.000 0.000 0.000 0.006 0.002 0.001 00.06 00.00 00.02
Mn 0.000O .OlD 0.020 00.00 00.30 O.OlD O.OlD 0.020 0.006 0.008 0.009 00.04 00.06 00.05
Mg 3.7803 5.00 3.600 33.70 14.60 3.460 2.360 2.220 1.796 1.525 1.569 17.50 14.37 16.06
Ca 0.0000 0.40 O.OlD O.OlD 00.00 0.020 O.OlD O.OlD 0.008 0.007 0.007 00.08 00.05 0.004
Na 01.20 02.00 01.70 0.2lD 01.70 01.60 0.240 01.40 0.000 0.002 0.001 00.00 00.02 0.001
K 1.8301 6.30 1.740 18.60 17.90 1.670 1.7lD 1.840 0.001 0.000 0.000 00.00 00.00 00.00
Ba 0.0000 0.40 0.080 O.OlD 00.00 0.080 0.000 0.000 0.000 0.000 0.000 00.00 00.00 00.00
Cations 161.45 160.14 161.75 16.208 160.27 160.66 160.40 163.26 3.012 2.969 3.008 3.021 30.07 30.03
sum.
aT otFaele xpresassFe edO N.A noatn alised
Rock( 199) 1as a diagnostfeiact uorfe a lkalitnheo osfeO IB,b uts hohwi ghRebr,B aT,h ,U , K,a nNbd
lamprophyres. Tac ontents.
Sr-Nd-iPsbo troaptei os
Whole-rogceko chemistry
Alli sotodpaitfcao SrC Sa lkallianmep rophyrdeisa ­and
Majoarn dt raeclee ments baseasr ec orrectto2e d6 M5a (Tab4l)e,t akiinngt o
considertahtemi oosnt regceeoncth ronorleosgui.lc tasl
Them aojr atnrda ceel emecnotm posIotfIt OhneS CS Figu7rs eh ows bontehwS rt-hNead n alypsreess einnte d
alkaldiynkeei ss shoTwanb l3i.enA lthouaglshla mpletsh iwso rka ndt hosree cenotbltya ibnyeo du rr esearch
havhei gLhO I numbers 2(.m9a-wi5tn.%l7)y , tdotu hee group( Villaestae 12c.0a 0;O4 reajnaet a 12.0 0)6T.h ed ata
abundaonfch ey dromuisn er(aalmsp hibaonldpe h logoo­vertlhawepi dceo mpositfiieolondfOa IlB , fwailtlhiinng
ptiet)h,o sdies platyhien gh ivgahleuscetos r reswpiotnhd t hme antalrer ay. Threa dimoogsceton mipco siptairo­ns
ocelliv-arrtiiiceehs . tialcloyi ncwiidteph r evidoautsfa r oBme ae ta 1(.19 9)9
Duet ot hesiirl aincdaa lkacloinst e(nrtasn gfirnogm andP erientia 1(.20 0)4,co nfirmtihnemga rkehde tero­
41.t2o4 7.w4t %a nd fr3o.mt 0o7 .w4t %r,e spectivgeelnye;oc uosm posiotfti hoenPs eer rniainn trusriovcek ass,
Tabl3)et heS CSl amprophyrdeisa baapnsldeo wsti thinp reviously sVuiglgleasesttaee 1cd(2.a 0 b04)ya ndO reajna
thael kalairneea t hiTenA Sd iagr(atma kfreonm LBea s eta 1(2. 00)6T.h ihse terogeanlelioutwsyts o d iefrfentiate
eta 11.9 8)m6,a inwliyt htihnbe a sanciotmep ositfiieolnda.tl w og ropus(:l o)n ei sotaolplidyce pleptleodt,tc ilnotgs oe
87 86
TheK 20IN2a0 ratoifto h lea mprop(haypr aersa meutseerd MORB composaintdwi iotn(hs Sr/ Sri)nto h er ange
tod iefrfentpioattaes frsoimcs odriocc kissh) i ghtehra n 0.7023-a0n.dc7 N0di3on8t h rea ng+e4 .t0o+ 7.1a,nd( 2)
unit(Fyi g4.) (L e Base ta 11.9 8;L6 eM aitertea 12.0 0)2, ani sotopiecnarlilcgyhr eodu rpe,s emblinsgi lbiuclakt e
wheretahsde i abaasreseso meNe.v eertlhetswso,l amproe­ar(BtSh E)i sotopic va(7l8SureS/sr8,)r 6oaw nigtifrhon mg
phyrsea mplwehsi cyhi elKd20 IN2a0 > 2c ould 0be. 70t4o04 . 70a5n2ds Ndfroo m- 0.t9o+ 1.(F4i g7.) A.l l
incluwdietdh ainnu ltrapogtraosusfpiol,cl owitnhegc ri­diabaasnedas n u ltrapoltaamspsriocp hyrteh Sefri oemr ra
teroifaF o1eeyta 1(.19 87)a nd MLaei treet a 1(.20 02) del aP aramera dyke tphledo etp lweittehdi ng roup. The
(Fig4.) A.p arfrto mb eihnigg h itnhe ayKr ,ce h aracteriiszoetdao lplieycn ricghreodu cpo rresptoonc dasm ptonitic
by hiTgih20 (1.4w-t4%.)a1 n dP 20,( 0.28w-t1%.)0 d ykes. iTsh eare rcelsoesmnebc leba etwetehneS r-Nd
concentraatnidom nosd erattoel owM g# (0.43-0i.so7t)oc poimcp osiotfti hoeSnC Sa lkalbiansedi yck es and
(Tab3l)e. thaotf t hem ostd epleatlekda lrioncekfr so m western
Thesael kaldiynkeea srm ea rkehdeltye rogeinnte hoeuisrE uroPpeer mo-Carbomnaigfmeraotui(ssF mi7 g).,t h iiss
major traancedel emecnotm posi(tei.Moggn.O 4.5-12d.i2s cubsesleodw .
=
wt%; Al203= 10.3-1w6t%.;8 C aO= 5-13w t%; TheP bi sotaonpael ydsiessp mloayrr ee stricctoemd­
Rb 46-1p4p5mZ ;r 121-3p6p7m ; Y2 2-6pp6m ) positivoanraila twiiotnh(" 60PbFO'Ipb)1o 8.16-18.51,
(T=a b3l)eT. h ed iaba= csaebnse d iefrfent= iated fro(m"o 7PlbFao4mPpbr)oo­1 5.54-a1n5d(".o P86bF4O= 'Ipb)3o7 .93-
= =
phyrest odt uheel iorw eKr- Ti-Ta-Zr-aHnfdh- iVg her3 8.(4T4a b4l).eT heo nlpyr eviPobui ss otdoapteaa v ail­
Mn-Cs conte(Fnitgs5. ) .W henc onsidseerpeadr atealbylo,en t heS CSa lkaldiynkeei sst haotf P erientia 1.
samplfreosm a singdlyek ues ually cosrnhpoows iti(o20n04a)l,t hersoec kbse lotnotg h Ser -Nids otopiecnrail­ly
variatcihoanrsa ctbeyra iniz necdr eianSs ie, NAaIK,, a nd ched grooflu apm prophyre8)s. O v(Feirga.tl hleP, b
mositn compattriabeclleee mtesan,n dad ecreoafTs ie, Cai,s otocpoem positairoecn lso steoP REMA (Prevalent
CrN,i a ndV towards Mgl#o(F wiegr5.) . Mantlaen)dB SE( mainwlhye nc onside206rPibFnOg'I Pb),
Thed ykeasr ea lscoh aracteriesntriiccahilenld y a lthoutghhe y dissopmleat ye ndentcoyw arbdesi ng
207 208
incompattriabcleeel emse.nT the REarEe fr actionastleidg htPlby a nd Pb_iecnhreNde.v etltehsetsh,eP b
showisntge ecph ondrite-npoartmtaelwriinstsheh id g hlyr adiogreantiicio nsd icdaetrei vafrtoimo an relatively
encrhieLdR EEa ndd epleHtReEdE (F ig6.) .T hec hon­deplestoeudr cWehe.n c onsidienrd eedti alt,h es ame
drite-norvmaalluiaesrseeb d e twe1e0n0 a nd4 00w ith divismiaodnoe n t he boafSs ri-sN ids otroapteic oasan l so
respteoct th Lea c ontewnhte,r eYabs aLnudv aluaerse bem adeo nt hbea soifsP bi sotope trhaSetr i-Noidss ;o ­
predomin<a2n0tTl.hy i s reiflse citnet dh eir (Lha!i ght opiceanlrliyc lhaemdp rophcylreeasr ly tdhimeso pslta y
Yb)Nv alufreosm 9 .t6o 2 3.L3IL.E and HaFlSsEo r adiogPebn viacl uweist htihne nacrormopwo sitional
displayc ohnicgehn trgaitviiornnigsst ,eop ositRihv-eB a rangoefS CSa lkaldiynkee( sF i8g)..A b senocfeh ighly
andNb- Ta anomaliinep sr imitmiavnet le-normarlaidsieodgP ebnd iact iam plitehsat th eP REMAc omponent
patte(Frnisg 6.) .It isa lswoo rtnho titnhgeK peak an(da nndo tH IMU)i sd ominainntt h ei sotopically depleted
theT h-Ua ndP bt roughs. These recosmepmobslSieCt Sia olnksa lgrionuep ( Oraenjae ta 12. 00)5.A similar
TablMea j3oa rn dt raeclee mecnotm posiotfSi CoSna lkallianmep ropahnydrd eisa bases
Lamprophyres
Dyke MaragatPou erdteoPl i co VillatoPraor amera SanB artoloTmoem adizos-Avila
deP inares
b
Sampl1e0 3811 103818 103681 103333A 7657477 753' 104541 80318 103474 103473'
GC' UK UK UK UK UK UK UK 703879 UK UK UK
286775 258893 289655 151890 433819 433819 660973 660973 660973
Si20 43.84 44.91 44.82 47.44 42.62 41.20 43.96 43.59 45.37 45.66
Ti20 3.09 3.71 3.72 3.47 2.47 2.75 2.85 4.09 3.68 3.61
Ah03 10.34 13.98 15.72 15.23 14.40 13.28 14.67 16.17 16.49 16.68
F�03d1 0.14 11.44 11.18 11.32 3.18 12.33 10.25 12.23 12.42 12.39
FeO NA NA NA NA 7.32 NA NA NA NA NA
MnO 0.13 0.17 0.16 0.15 0.17 0.16 0.13 0.12 0.13 0.12
MgO 12.22 7.63 6.04 6.07 10.78 11.05 7.83 5.83 5.37 4.91
CaO 12.91 7.91 6.82 5.52 9.81 10.24 8.32 5.95 5.89 5.07
Na,O 1.31 2.30 2.83 2.89 2.09 1.18 2.31 1.60 3.17 2.97
K20 1.69 3.59 3.90 3.77 2.58 3.52 3.79 4.26 3.86 4.39
P205 0.28 0.43 0.38 0.43 0.51 0.58 0.72 0.75 0.74 0.78
LOI 3.99 3.53 4.50 3.69 3.70 3.31 5.29 4.22 2.92 3.58
Total9 9.94 99.60 100.079 9.98 99.63 99.60 100.12 98.81 100.041 00.16
Mg# 0.70 0.57 0.52 0.51 0.65 0.64 0.60 0.49 0.46 0.44
Ba 1353 1429 1083 1078 968 854 1425 1021 1203 2475
Rb 48.9 107 145 113 46 74 115 132 105 137
Cs 4.31 1.51 3.75 2.11 NA NA 6.49 NA 3.68 5.5
Sr 514 631 705 591 536 585 1266 781 923 803
Pb 2.96 4.67 5.19 51. NA 3.28 6.09 NA 6.24 6.56
111 2.65 5.17 4.98 5.96 NA 5 6.94 6 6.25 6.21
U 0.64 1.03 1.12 1.55 NA 1.32 1.82 NA 1.63 1.75
Zr 177 241 274 283 112 167 356 329 355 367
Nb 45.7 74.7 79.3 86.6 NANA 69 107 110 107 110
Y 42.5 24.2 25.6 26.8 31 25 235. 43 54.2 662.
Se NA NA NA NA NA 34 NA 31 NA NA
Co 47.2 36.2 31.5 30 NA 48 344. 32 36.7 341.
V 288 321 296 354 NA 280 256 420 384 377
Ni 103 55.8 27 18.6 165 176 103 40 25 225.
Cr 767 183 66.4 52.4 NA 415 272 60 40.6 354.
Cu 25.3 44.9 21.6 39.4 NA 80 392. 44 30.5 287.
Zn 75.8 102 112 116 NA 83 959. 90 107 110
Ga 15.9 20.4 20.9 21.6 10 22 201. 27 22.2 225.
Ta 3.81 6.14 6.57 6.62 NA NA 8.52 NA 8.69 8.87
Ht 4.76 6.05 63. 6.76 NA NA 7.47 NA 7.99 7.61
La 29.1 40.9 43.6 53.2 50 39.7 613. 96 69.3 823.
Ce 54.4 84.3 85.5 108 56 69.7 120 1185. 128 137
Pr 78. 10.1 10.4 12.9 NA NA 136. NA 17.8 213.
Nd 33.2 39.6 40.8 49.3 NA 35.2 509. 742. 72.3 844.
Srn 7.07 7.37 7.62 8.49 NA 7.12 8.69 14.91 13.4 169.
Eu 2.07 2.11 2.43 26. NA 2.27 2.82 3.56 3.93 4.64
Gd 7.31 6.02 6.31 70.4 NA 6.56 6.85 11.37 11.9 146.
Tb 1.01 0.86 0.92 0.98 NA NA 0.88 NA 1.73 2.11
Dy 5.56 4.72 4.84 5.39 NA 49. 4.82 8.57 9.31 119.