Andean Geology ISSN: 0718-7092 [email protected] Servicio Nacional de Geología y Minería Chile

Coloma, Felipe; Valin, Ximena; Oliveros, Verónica; Vásquez, Paulina; Creixell, Christian; Salazar, Esteban; Ducea, Mihai N. Geochemistry of Permian to Triassic igneous rocks from northern Chile (28º-30º15’S): Implications on the dynamics of the proto-Andean margin Andean Geology, vol. 44, núm. 2, mayo, 2017, pp. 147-178 Servicio Nacional de Geología y Minería Santiago, Chile

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Geochemistry of Permian to Triassic igneous rocks from northern Chile (28º-30º15’S): Implications on the dynamics of the proto-Andean margin

Felipe Coloma 1, Ximena Valin 2, *Verónica Oliveros 2, Paulina Vásquez 1, Christian Creixell 1, Esteban Salazar 1, Mihai, N. Ducea 3,4

1
eco aconal de Geologa y Mnea, Ada.
ana Maa 0104,
anago,  le. el e.colo a enageo n.cl alna.ae enageo n.cl c an.ceell enageo n.cl eean.alaa enageo n.cl 2 e aa eno enca de la ea, nedad de once cn, co a a 120, alla 10-, once cn,  le. oleo dec.cl  ena.aln g al.co  e a en o Geocence, ney o Aona, con, A 8 721, 
A. dcea e al.aona.ed 4 neaea €ce, •aclaea de Geologe Geo ca,
ada . €alcec  1, €ce, ‚o ana

ƒ oe ondng a o: oleo dec.cl

ABSTRACT.
eian o iai igneo o  o ing o in  e oaa and ona odi ea in no en i e eeen 200 and 3015 ae ong een ine eed o e een od o agai e aed o an eeniona eoni eing ei e a  e e  o a anaei o a eno ei an e deo eion e ing in a aie oninena agin. ig -i a e o oni 1 and o ani 25 o  o  i egion ae  aaeied eoga ia  and geo eia .  e ae
eian o a  ai in age   e a€oi o  e died o  oe ond o  e •oe o ‚idd e iai o a
oni o e  e o eia  o i oan ni in  e aea.  e o a e ae eae  ia o aga deied o  -inded e ing o a de eed an e  a: oad ange o eoga i o oiion i edoinane o ineediae o aid ee ig  o i o ani o  agneie a  e e-i oide inea ae eni en in •ƒ• oe „ a ed de eion in … a i and
and odeae o no negaie  anoa ie. e o  e died o a e †10‡ ae a a ine ignae and ae e een onen e eenaie o anoogeni agai. ƒn  i o  e o oe  a dion o an oeani ae enea  e o ˆeian oninen i e oni e o  e eo ion o  e agin o  e
eian o a  ai a  e died aide. ˆ e iina ine eaion o  e agin a iee o  e ˆndean agin o  e
eian o  e iai o d e  a  e an o‰in and o a oni o ee e een  e oo o a agai a dee o ed o  e
eian o  e ‚idd e o ea  •ae iai  eea  e Šanao ono and
ao ‹ ano oaion o d e  e  a oe a o  a.  e •a ooa oaion and oe o eia  ino Œ e iai inie ni e een agai od i a a ine ignae  i dee o ed iediae  eoe  e ea i en o  e agai a in  e een-da oaa odi ea ding  e • aeian o a  ai.

„eywod: ac,
dcon, …e-andean, •onal codllea, Geoc e y .

RESUMEN. Geoquímica de rocas ígneas Permo-Triásicas del norte de Chile (28º-30º15’S): Implicancias en la dinámica del margen pre-Andino. •a oa Žgnea de
eo-i•io ‰e a oan en a odi ea de a oa  ona en e noe de i e ene o 200   3015  an ido ine eada i•iaene oo odo de agaio aoiado a n aiene eeniona  oo e e ado de n oeo de anaei oia o ien i•n de ano aeno‘io en n agen aio. e ana iaon  ea de a a e 1 oe onden a oa •nia  25 a oa o •nia a a ‰e e e io na aaeiai•n eog•ia  geo‰Žia. on de edad ‘ia a €•ia ineio eo a aoŽa de a ea de oa ana iada oe onden a o e€o
•nio o a de 14 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)... edad i•io ƒneio-‚edio iendo a nidad • i oane en e •ea de edio. •a ea ana iada ienen aaeŽia Ž ia de aga deiado de i•n de n ano e oeido oo: a io ango o oiiona on edoinio de o o onene ineedio a •ido oa o •nia a aene oŽdia agneia oo ae inea ini a de e-i eni‰eiieno en e eeno •ƒ• oe „ e oeiieno en … a i 

odeada a ineiene anoaa negai a de en a o a e diada ag na 10 ienen igna a a aina
onenido de eeeno aa eeenai o de agaio anoogni o. n ee aao e oone  e a  d in de na a a o eni a ao e oninene de  dai a e eonae de a e o in de agen ene e i o
e  i o n eio a a ai de e diada. €na ineea in eiina de a a ie  a de agen •ndino dede e i o a ‚ii o  ede e  e o oeo  ni o ƒ„an „o n
ƒ„oa
eeenen a a e de n a o agi o deaoado ene e i o
e ‚ii o …edio a  eio iena  e a oa ione † ana o ono
ao ‡an o odan e o ione   e i iae de ee a o. ˆa ‰oa in ˆa ‚ooa
ag no eo enoe de in i o de ‚ii o  eio eeenan od o on igna a a aina o  e e deaoaon inediaaene ane de eae iieno de a o agi o en a a  a odiea de a ƒoa d ane e Šaeiano a  i o n eio.

alaa clae: co, d cc n,
e-andno, odllea onal, Geo ca.

1. Introduction o „ •ei an agin ae ‹e eoed a„o g„ „ig„
de oed. n ai a ni oing o  in ‚„e eian o ‚iai i a ono eia eiod „e e odiea and ‰ona ƒodiea o no„en o „e o „‹een †ond‹ana agin e o ion ƒ„ie e‹een 2‘˜00— and 2•˜30— ae a good e od in e i i „o g„ o eeen a igni i an agai o „i Œe
ie ae io o „e •ndean  d ion.   „a e ed o a Œ o  d ion a e „e n •genina „e ˆae eian o ‚iai eiod oogeni oae oo‹ing „e eian •an i „aa eied 
„e ‹ideead agai Ša aeŽ oogeni e en •ai e al., 1••0 …odoi eeened 
„e ƒ„oi
oi go  ‹„oe oigin „ad and Šao 1•‘• …odoi and ’a
 1••2. ‚„e een ai ed o  a anaei d e o i„o„ei agai o  e ‹o d „a e „anged igni i an
 eenion ao iaed o an oogeni oae ˆaa de eaing „e  a oonen e‹een „e ˆae and ao 1••0 ˆaa e al., 1••3. • id eoi e eian and „e a
 ai . ‚„i „ange ‹„i „ o ani i ‹e do ened ni „e a
‚iai o ed d ing „e ‚iai  i eained 
oe and oo‹ed 
ediena
i  deoi ‹i„ a „o a „e eone o a „i  o  d ion in aai o Œ o anoogeni a iniie in „e ƒ
o a oei e eing o an eeniona oninena and  „ig aao ain Šao and ’a
 1••1. i -eaed e oni eing d e o angea eaŒ  ‚„e geoogi a aoga„
o no„en ƒ„ie …odoi and ’a
 1••2 “e  e al., 2014 o a e‹een 27˜00— and 30˜00— „a een daed o e eeniona de oaion in „e o eiding ae in a „e a de ade ‹i„ ‹oŒ e oed a 1:100.000 onin o   d ion eing V e e al., 2011  ae 
„e e i io •a iona de †eooga
…inea oa e al., 2014 ”e Še
e al., 201•.  Š••† ™…• šeŒne e al., 200• • ao n „e ƒoaa and ‰ona odiea o no„- and šeŒne 200‘ …o oo e al., 2010 aaa ena ƒ„ie „e ae eing „a a o „e •nde e al., 2013 ƒeie e al., 2012 ƒeie e al., aong „e ƒ„ie-•genina ode e‹een 2‘–20— and 2013 …ane e al., 2015 ™i and …eino 2015 31–  „a ea e i ed aeooi aeen o Œ aaa and ƒooa 201•. ‚„ee ‹oŒ in  de age  ei e ƒea eo  o …io ene de oaion on geo „onoogi a daaae in addiion o e ined ‹i„in „e en a- d ion egen o „e i„o aiga„i ni de iniion. n ai a •nde „a e geneaed o„ „in- and „i Œ-Œinned „e ˆae aeooi o ‚iai o Œ ni „a een de oaion in a od-and „  e …o oo and igni i an
odi ied in ooaing e ea ne‹ …odoi 1•‘‘ …ane e al., 2012 eoing ni and ede ining „oe e io 
Œno‹n. en age oion o ae aeooi and ea
…eooi „o g„ eeni e o  o o a idi o ani and aeen e‹een 27–00— and 30–00— Šia e al.,   o ani o Œ o „e ˆae ƒaoni eo  o 1•‘‘ aaa e al., 2013 “e  e al., 2014. ‚„  „e eian ae eoed in „e e odiea and „e geoogi a e od eeening „e †ond‹ana ‰ona ƒodiea and ineeed a e i aen and a
•ndean age o „e e o ion o „e o „e ƒ„oi
oi †o . ‚„e ‚iai o Œ ni ae oloa e al.
Andean Geology 44 (2): 147-178, 2017 14•

oe di ee and in  de age  oni oee • ˆ ao and †ene 200‡ ei e e al., 2012
. eoi e o ani e en e o da ii o „
oii • ong e ode ‰e o€oi in  i e ae e ai€a ooiion oninena o aine ediena
aŠo  oni o e  a i e o dioi e  a € e en e ‹i„ ino o ani oonen and dioi e  ganodioi e and gani e onded  o ani e en e o aai -andeie o „
oii n oni no a a and an age ange e een ooiion Še e 1•74 •ai e al., 1••0 20 and 20 ‰a e •godone ani e o o ed aaa e al., 2013 ™i and …eino 2015 aaa o on€ogani e and ganodioi e o 203-1 ‰a and ƒooa 201•. ‚„  „e de eoen o a and onded  a ioe oni e †ene oninena i  „ae in „e o „ •ei an ae e al., 200‡ •ˆ ao and †ene 200‡ ei e d ing „e ‚iai i no a aig„ o‹ad o e al., 2012
and e ‹eada a Va a onai e „e geoogi a e od in no„en ƒ„ie e‹een o o ed o onai e and a € dioi e anging 27– and 30– . ‰ „eoe eeni e geo „ei a in age o 13 o 11 ‰a †ene e al., 200‡ daa o „e ‚iai ni i a Œing e  ding ei e e al., 2012
. a e oni ineeaion o „e agai o i Œe ea aeo€oi and ‰e o€oi ni ae „ei a igna e. e ogni€ed in e ‚on a odiea e o ee an n „i ae ‹e een ne‹ eoga„i a o i  o e e en d ae i ed in ae 1. e and geo „ei a daa o e ea ˆae aeooi e ian and ia i  oni ni a e a di in o ‚iai   oni and o ani ni oing a ia di i ion aong e ‚on a odiea a o o  in „e ƒoaa 2‘–00— -2•–30—  and ‰ona aae og „-Œ ending e . e e en e odiea o no„en ƒ„ie 2‘˜30— -30 ˜15— . o i e enn  anian o i aian gani oid o ‚„e geo „onoog
o „ee ni „a een eened e an a and an oin  oni o e e a ee‹„ee ƒeie e al., 2012 Vain 2014 in de a e •e onian o ‰i i iian e a oi Vaeo 2014 aaa e al., 2013 ƒeie e al., o  and ene on e oaneo o ani deo i 201• ™i and …eino 2015 aaa and ƒooa ‚ig. 1
. e ea en e i o o ed ain  201•. ‚„e ne‹ daa ao‹  o e ie e io  o o o e oa  oni o e  in ding ode o „e e oni eing o „e aeooi o •e onian e a edi en  aonieo gani oid  ‚iai agai i o  e and o ee o e ian e a oi o  and onai e  and geneaion. ene on e oaneo o ani deo i i  ino o onen o e ian in  i e . Žn e een e o 2. Geological Setting e  a eed o o o aonieo gani oid and ig-gade gnei and e a oni o  ae n „e ƒoaa ƒodiea 2‘–-2•–  ‰ig. 1 ond Œaa€a e al., 2013‡ • i€ and ‰eino 2015‡ „e aeooi aeen i eeened 
„e Œaa€a and oo a 201
‚ig. 1
. ”e onian o eian  na de ƒ„oo …eao„i e an a  oni o e • i€ and ‰eino ƒoe ooed 
i a „i and eaaie 2015
 ei aen o e an a ni o „a i e al. ƒeie e al., 2012
and aaa i e a oi 15
 i o o ed o e o o e o a i  oa e o e e  i  on i ain o e a idi e o edi -gained a  oia ed io i e and and e a edi en a o  odo and aa a ioe onai e and ganodioi e  anging in age 1
and e aonieo o e ian ano o 300 o 20 ‰a „a i e al., 15‡ •e ˆ e al., de o oa e ed ei e e al., 2012 201
. 2014‡ • i€ and ‰eino 2015
. Žn on ini  o e e a e i a edi en a o  een e ain no  e an o ‘n  oni o e i a i e on inen a deo i ed in a de a en ion en i  o edi o oa e gained gani oid o o ed o o i a o ani deo i ei e e al., 201
. o- i a ganodioi e  on€ogani e  io i e and e e aeo€oi ni ae n ono a o eaid a ioe onai e and dioi e  a ange o 27  ia i o  o e an o de •ga ‚o a ion o 25 ‰a in age Œaa€a e al., 2013
. e ‹eada a geogai a e i ed edi en a een e  in ado onai e ae a oia ed  oni and e o ani ƒa i o  in ded in e a odie and oe ond o onai e and ganodioi e „ega ‚o a ion and in ded  e ea  oni o a ioe and io i e o ‰idde e ian age o e e anging in age o e …e ia i 272-2 ‰a Œaa€a and oo a 201
. • e o e oe e a eo †ene e al., 200‡ aoe en ioned ni ee e io  a igned o 150 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

71°W 70°W 28°S 28°S

N

W E

S

Vallenar

Alto del Carmen

29°S 29°S

28ºS

PC CC FC

La Serena 30ºS

30°S 30°S Vicuña

0 25 50 km 71°W 70°W

Intrusive units: MG, LTG, CBPC, AG Middle-Late Triassic Plutonic Complexes : (Late Triassic-Early Jurassic) ChoPC, LG, CG Pastos Blancos/La Totora/La Ternera Paleozoic plutonic complexes: GPC, ChPC, QEPT formations (Upper Triassic) (Late Carboniferous - Middle Permian) San Félix-Canto del Agua formations Metamorphic Complexes (Lower- Middle Triassic) (Carboniferous - Permian) Guanaco Sonso Formation Llano de Chocolate Beds (Upper Permian-Lower Triassic) (Carboniferous-Lower Permian) Montosa-El Potro Plutonic Complex Sample locality (Permian-Middle Triassic) Fault

‚Ž. 1. Œi iied geoogi a a o e died egion in ding a e o a ion. GPC: an a  oni o e  ChPC: an o - ‘n  oni o e€ QEPT: ‹eada e in ado onai e  ChoPC: oa  oni o e  LG: a agna ao CG: ooado Œenogani e MG: ‰on egande ani e‡ LTG: o io  on‡ CBPC : ai€a aŠo  oni o e ‡ AG: •godone ani e‡ CC: oa a odiea PC: e odiea FC: ‚on a odiea. oloa e al.
Andean Geology 44 (2): 147-178, 2017 151

e i Œeni  an a o ia ion o aonieo o i i e e e and a i o in e edia e a a o e ian aa oa e gained  oni odie in e e o e e Œaa€a e al., 2013
. eie ed o ee ignii an  ai€a ion • og e age ange o i o a ion o i e de  „a i e al., 15
. e oa  oni e en ie ia i eiod o i on en and …- o e  ei aen o e oa ni o „a i e geo onoog indi a e a o o e edi en a ion al. 15
 ange in age o 24 o 23 ‰a and i oo a e o e oe o e ‰idde ia i o o ed o i e dieen i oa ie  i  edi and on e e o e e i a e ia i in o e oa e gained  on a in de gao- age i  i o eed  and in einge ea ad dioi e onai e enogani e ganodiodioi e and i  ande i i a a o e a o oa ‚o a ion on€ogani e eing e o a e e o andan “e e 174‡ Œaa€a e al., 2013
. e a o oa Œaa€a e al., 2013‡ Œaa€a and oo a 201
. e ‚o a ion i a o ani een e o o ed o a a ooado enogani e oe ond o a go o and  o a i and in e edia e o o i ion ooe o a i  ine-gained o oi i  oni anging in age o 221 o 212 ‰a “e e 174‡ odie o aa ei i eddi  oo a ange in Œaa€a e al., 2013‡ ‰a ae e al., 2014‡ Œaa€a age o 225 o 21 „a i e al., 15‡ Œaa€a  oo a 201
. a o e o o o e e al., 2013‡ ‰a ae e al., 2014
. Žn e a e Œan ‚ ˆi ‚o a ion a o oa ‚o a ion o e geogai o i ion a e ooado enogani e n ono a e oa  oni o e and e ea dioi i and ganodioi i ni a e een a e i o eed  e aine oe o ‰idde ƒa i de ied  • i€ and ‰eino 2015
 i  an age o o  o e a ao ‚o a ion. ca. 215 ‰a. • e e ia i in  i e o  ae e a agna ao ‰on egande ani e o 3. Samples and methods io anodioi e a o aed o io  on a e „a i e al., 10‡ •e ˆ e al., 2014
and ai die e o e e da a e in de eig - i a e a ‰odo€i and oneŠo 1‡ ‰a in e al., o  oni 1
and o ani 25
o  ae 1 1‡ ei e e al., 200‡ •e ˆ e al., 2014
. • ‚ig. 1
eonging o e e dieen aeo€oi and e e ni ee a igned o e Žngag’ Œeni ‰e o€oi ni . ‚o e o e o i d  „a i e al. 15
. e o ani o  oe ed o o o o e •ne o e ode

a iied ni i e …e e o e e o e Œan ‚ ˆi ‚o a ion ae e ian- oe ia i ana o Œon o ‚o a ion a igned o e a o oa ‚o a ion a oding o i  i n ono a o eain  e …e ia i e ino a ion gi en in e e io a e. e a o an o ‚o a ion „a i e al., 10‡ ‰a in i oogie o e ee ed a e ae: a a i  e al., 1‡ • i€ and ‰eino 2015‡ Œaa€a and a a i -ande i e and da i i a a   a and i i oo a 201
. e e ni ee oigina a igned aii   ganodioi e  onai e  gani e  gao o e a o an o ‚o a ion „a i e al., 10
and dioi e . Œi -i e a e ee oe ed o o e ana o Œon o and o io Œeen e ding e geoogi a aing o e e odiea o e a o an o o ‰a in e al., 1
. and ‚on a odiea e een 2 ”30 • and 2”00•Œ e on i ain o o a i and o ano a i  a ea o e Œe i io „a iona de eoog‘a  o   o in e edia e o a idi o o i ion i  ‰ine‘a Œ“„••‰Ž„
. e e ogai ino a a  ‰a in e al., 1‡ Œaa€a e al., de i ion and e od  ed in e geo e i a 2013‡ • i€ and ‰eino 2015‡ Œaa€a and oo a ana i o e e o  a e ae de aied in Œaa€a 201
  e ae a o in ding oa e and one  e al. 2013
- e an e o ained o a o ongo ea e and ei a i o  . †ie o  o oo a and Œaa€a on ee - and  ai€ed e ana o Œon o ‚o a ion n ono a o eie ee and in e ooing a e . e e aining aeo€oi e a oi a e en  e o  o a o en -one a e ee oe ed in e oa a an o ‚o a ion e o e e oa  oni odiea and e odiea e een 2” Œ and o e and i in n in ded  e ooado 30”15• Œ o e ogai and geo e i a ana i . enogani e and de . e Œan ‚ ˆi ‚o a ion e in e ion ee ana€ed nde e oai€ed- i a 000 i  a i on inen a- aine o  ig i o oe o a e a and ineaogi a  e ion o ia i age “e e 174
a on ain aa ei€a ion. e a e ee  ed and e  a e  aine and i i aii  e e in o e ag en andi ed nde ino a i o oe. 152 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

TABLE 1. GEOLOGICAL UNITS STUDIED IN THIS WORK WITH THEIR REPRESENTATIVE LITHOLOGIES AND AGE RANGE, ANALYZED SAMPLES FOR EACH UNIT AND THEIR ALTERATION DEGREE EXPRESSED AS % OF THE TOTAL VOLUME OF THE ROCK.

Alteration Unit Samples Lithologies Age range degree

ano de o oa e ed V-12-12 V-12-105 V-12-127 “oi e •a i e 0.24-0. 31-25 ‰a 1 “oi i 

an o‘n  oni o e Œ-04  -310  -311  -312  onai e 0.00-0.1 2-25 ‰a 2 and an a …ni -333  -340  -1  Œ-70  anodioi e Œ-71  -23  -334  -337  07-15

…e e ian •ie Œ- …nde e ined 0.1 -

‹eada de in ado onai e -10  -202  -2  Œ-7 onai e 0.02-0.0 272-25 ‰a 2

ana o Œon o ‚o a ion -213  -21  Œ-13  a a  a a i 0.13-0.35 25-240 ‰a 2 Œ-14  -2 •nde i e •a i e “oi e

a agna ao 07-10 07-11 ao 0.01-0.02 255 ‰a 3

oa  oni o e -22  Œ-1  -1  -237  anodioi e 0.015-0.17 247-237 ‰a 2 anodioi e
-24  Œ-10  -11  -1  -154

oa  oni o e Œ-02  -14•  -15  ‰on€ogani e 0.03-0.12 247-233 ‰a 2 ‰on€ogani e
-11  -1  -1  -233  -2  -20  -21  -24  -303  Œ-0  Œ-  Œ-17

oa  oni o e Œ-0  -14  -17  -173  onai e 0.04-0.27 237-234 ‰a 2 onai e
-250  -255  -300  -35

oa  oni o e -13 •ioi e 0.11 24-242 ‰a 2 ao-•ioi e

Œan ‚ˆi ‚o a ion V-12-3 V-12-4-75•  i i  •nde - 0.1-0.7 254-212 ‰a 2 4 Œ-212• i i  

…e ia i die -74 0.4 -

ooado Œenogani e Œ-14  Œ- Œenogani e 0.05-0.0 22-21 ‰a 2

a o oa ‚o a ion Œ-3•  Œ-1  Œ-11  Œ-1  •nde i i  0.0-0. 221-210 ‰a 2 5 V-12-23 V-12-24 V-12-0 “oi i  Œ-2  Œ-2  Œ-175  Œ-43 •nde i e a a   “oi e “oi i 

‰on egande ani e 07-07 07-0 ani e 0.01 215 ‰a anodioi e

o io  on 07-13 anodioi e 0.01 215 ‰a

ai€a aŠo o e V-12-1• V-12-1 •ioi e onai e 0.05-0.23 20-20 ‰a  V-12-3 anodioi e

•godone ani e V-12-2 •ioi e 0.4 203-1 ‰a 

1ei e e al. 201
‡ 2Œaa€a e al. 2013
‡ 3•e ˆ e al. 2014
‡ 4VaeŠo 2014
‡ 5‰a ae e al. 2014
‡ •ˆ ao and †ene 200
. oloa e al.
Andean Geology 44 (2): 147-178, 2017 153

e ee ed ag en  ei€ed nde 0 m age i €an…a i on a genea  ee i o e i a ana e o aŠo and a e ee en . ea een i …no n age o 5‰4•4 a 2 σ ‰aŠo ee en on en ee de e ined og eo i ed o oe  o i a ionaion ee
 
a  oe en e eea a e e eena ee  e al., 200• . ‚e n eain e ing o on enaion ee deeined on a  ad o e ing e e a i aion oe ion i genea  Š1‹ 2 σ o o e o - a e eo ien e eaen o o 20‰  / 207  and 20‰  / 23•  age. e niei o iona. na i a e ni e ‚e eoed age ae deeined o e a e eaaion o ed e and andad ee eiged ean o e 20‰  / 23•  age o e on odan eio   de i ed in aan e al. 2015 and and oe aing ana e € d ig 2003 . ‚e eoed oe e al. 2013 . n eain  a e ed ‘ean’ i aed on e  ae - geo ono og o i on a ond ed and e iion o e e o 20‰  / 23•  o 20‰  / 207   €--- a e iona €aeon age eiged a oding o ei ea een eo ene ee  e al., 200• . ‚e ana e ino e o n a 1 σ . ‚e eai eo i  in de a aion o i on i a ƒe „ae/€a da i… oni ion o e andad a i aion age o V1†3 ‡ˆ ie ae oeaing a a ae eng e a i aion andad ooiion o oon o 1†3 n ing a o diaee o 25 o 35 m.  and  de a onan i genea  Š1-2‹ 2 σ . ‚e a aed aeia i aied i e i  ga ino e  aa o  e o a V n en oo e 4. Petrography of the plutonic and volcanic rocks i  i e ied i a  ig  e o  i ien id a  ‚ and  iooe ae ea ed ‚e eoga o e  died a e a i aneo  .  ea een ae ade in ai aied o  ain  in in e ion in i  e ode ing aada dee o o 23•  and 232 ‚ an ain inea og o ia and e onda a ion- o ning anne o 204   and eie aada diing ied. oe iage o e in e ion o e o o ion o ning anne  o 20•-20‰  . on ae deai ed in ig e 2 and e deai  o ee ie d ae Š1 V  −1 . ‡a  ana i oni o de iion ae in e endiˆ 1. one 20 -inegaion on ea… i e ae o o a …go nd   en 1 -inegaion i e ae 4.1. Llano de Chocolate Beds iing and a 30  de a o  ge e eio  a e and o eae o e neˆ ana i. ‚e a aion i n i ni e o ani and o ai o … i Š15 m in de. ae ine edded in e doinan  ediena o ea  ana i e eo in deeining e en e Va e“o 2014” eiˆe e al., 201‰ and 20‰  / 23•  and 20‰  / 204  e  in a ea een eo e oeond o da ii aa and a ine ai i o Š1‹ a 2 σ ee in e 20‰  / 23•  age. ‚e eo  . ‚e da ie ae oi eˆ e  ig  in ea een o 20‰  / 207  and 20‰  / 204  a o eiaed i e ii go nda. ‚e eno  e  in Š1‹ 2 σ n eain in age o gain a oeond o ea o ed  a  agio ae and ae Œ1.0 a  ae  ania  age o o nge ioie.  eaion inea  eeen  o 5‹ o gain d e o o ineni o e 207  igna . o e o … i a ie and a inea  e a ing o ana e e ooe in e iion o 20‰  / 23•   agio ae and ioie i e a ed  eidoe and and 20‰  / 207  age o  a Š1.0 a. oon   oie. • a ioie a ie and ei ie a o o  oe ion i a o ied  ing e ea ed in ein e. ‚e   ae agena eˆ e i 204  and a ing an iniia  ooiion o iae and eno  o  a and  agio ae. a e and •ae 1†75  i n eainie e onda a ie and ioie o  in ein e. o 1.0 o 20‰  / 204  and 0.3 o 207  / 204  . ‚e ea een o 204  i nae ed  e een e 4.2. Chanchoquín Plutonic Complex o 204 Žg e a e a …go nd ae ea ed on ea… ee   a ing an a …go nd 204 Žg ‚e an o –n  oni o eˆ i ooed and 204   and e a e e i e Žg i een in ain  o ona ie and ganodioie i ino e agon ga. nee een a ionaion o  / i onoganie and dioie e  died a e genea  Š20‹ eea a ionaion o  iooe in de on  ona ii and ganodioii io ogie. i genea  •2‹. n- n ana i o agen o a anodioie ae ine o edi  gained and onain 154 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

Quartz

Biotite

Muscovite Prehnite Quartz Plagioclase

Quartz Biotite Plagioclase

Amphibole  —

Biotite Plagioclase Plagioclase

Amphibole Quartz

 Microcline 

Quartz

Biotite Quartz

Plagioclase Plagioclase Plagioclase ‡  1000 m

Plagioclase

Chlorite Plagioclase Quartz

Biotite  500 m Ž 500 m

. 2. i oooga o e o e ean io ogie o e  died ni: A. ‚ona ie an o –n  oni o eˆ” B. ‚ona ie • e ada e inado ‚ona ie” C. onoganie o a  oni o eˆ” D. ‚ona ie o a  oni o eˆ” E. anodioie o a  oni o eˆ” F. a ie € ano de o o ae —ed” G. ndeii a in o ani e ia €a ‚ooa oaion” H. a ine   an ˜ iˆ oaion. oloa e al.
Andean Geology 44 (2): 147-178, 2017 155

 a i nd ao eˆin ion  agio ae o aenie i i i ai ainaed ong oeae oo ae ioie and ino   oie o ai o e” and edi  o oae gained andone ae o nd a eo inea  ae e-‚i oˆide ain  agneie a ong i  a e o  o o a ine  done and ene. eii eˆ e i o eed in oe and e. ‚e ain io og i a and ii - e da a . ‚ee io ogie ae  ig  eaing ii ai i   i  agio ae  a a eed  e an 10‹ o e o e o … i and ai o e eno  a id o ani agen ei ie e a ing e da and enie and eidoe and  i e o i iei o eniei ie. e a ing ioie. ‚ona ie ae edi  o ine gained e onain  a i nd ao eˆin ion and 4.6. Chollay Plutonic Complex o  a ine oned  agio ae oo ae ioie   oie ino ai o e i e-‚i oˆide and ‚e o a  oni o eˆ i e age aaie a a eo inea .  eaion inea  ae in ie ni in e  died aea ig. 1 and i i genea  e an e •‹ o e o …  in ee ooed ain  o onoganie and ganodioie a e e ea  e 15‹ i ei ie e a ing a ong i dioie o ga o ona ie and enoganie. e da and  oie eidoe and enie e a ing ‚e onoganie ae in… and oae gained ai inea .  e o  o  a e e o … ae o … i  onain  a i nd ao o iaed o aia e degee. eˆin ion and o a  o  a ine oeie oned  agio ae oo ae i eii eˆ e 4.3. Los Tilos Granodiorite ino i o ine ioie   oie i e-‚i oˆide ain  agneie and ene a a eo ‚i ni i aa eied  e een e o inea ” a eaion inea  eeen  o e odieie in i inea og i a oooi 10‹ o e o … o e i ei ie e a ing ine igan a eˆ e” i ooiion aie e een e da and  oie and eidoe e a ing ioie. ganie and ganodioie and i ooed   a ‚e ganodioie ae gai ie ine o edi  a …a i e da  agio ae ioie ie i a i gained o … i oned  agio ae  a i  ig deoaion and odieie. ‚e  a a nd ao eˆin ion and o a  o  a ine nd ao eˆin ion and o a  o  a gano ai oo ae i eii eˆ e ioie ai o e eˆ e ioie i a eed o  oie and eidoe and and   oie i ene aaie and  i e a o   ig deoaion ii a o e ie i a. a eo inea  e a eaion inea  an ea  15‹ in o e o e o … i ain  ei ie 4.4. Quebrada El Pintado Tonalites e a ing e da and  oie e a ing ioie i e eidoe and enie ae a o o eed e a ing ‚e o … o i ni ae ge ine o edi  ai inea . ‚e dioie and ga o ae da… gained ona ie i o a i iei o eniei ge edi  o ine gained o … e onain o iaion. ‚e onain o  a ine  a i oned  agio ae and aia e ao n o o iine nd ao eˆin ion  agio ae ino oo ae and inooˆene e ae i ai o e i ioie ai o e oˆene   oie and e-‚i ino ioie and e-‚i oˆide aaie and  i e a oˆide i aaie a a eo inea . e…ii a eo inea ” a eaion inea  an ea  and eii eˆ e ae o eed in e e da. 12‹ o e o e o e o … i ei ie e a ing e onda inea eeen e an e ‰‹ o e  agio ae and  a e  oie and enie. ‚e o e o e o … i ei ie e a ing e da ona ie ae edi  o ine gained ge o … and  oie and eidoe e a ing ioie. onain  a i nd ao eˆin ion oned  agio ae  a e oo ae ioie on ende 4.5. Guanaco Sonso Formation and e-‚i oˆide ain  agneie  i aaie and ene a a eo inea  and a eaion ‚i o ani and ediena ni i o ei - inea  eeen e een 7 o 25‹ o e oa a  ioan in e ona odi ea ig. 1 and o e o e o … i ei ie e a ing  agio ae i i ooed ain  o da ii o o ii  a  4-15‹   oie e a ing ioie and ai o e 3- e ded   and aa  o  o aa i  da ii and 12‹ and dieinaed eidoe. ‚e enoganie o ii ooiion. ino ediena ed o ae oange edi  gained o … onain  a e 15‰ Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

 agio ae oo ae i eii eˆ e  a 1†•• i o… . ‚e ga o ae oae-gained i nd ao eˆin ion  a e e-‚i oˆide and i idiooi ine igan a eˆ e i i on a a eo inea .  agio ae inei ia inooˆene oooˆene oa e inea  and ino  a and inei ia 4.7. Colorado Syenogranites oo ae. €o a  e o … eˆi i gai eˆ e.  inooˆene o d e een a ea ion i ‚e io ogie in i  oni ni a o i  en oe oa e inea . ‚e a eaion in enoganie o onoganie i e…ii ee o … i  a e oˆene ae a eed o  oie and gai eˆ e in e e da. ‚e o … eidoe and oa e inea  eea  agio ae ae in…-oange oae o edi  gained i ae  ig  a eed o ei ie. oi o aneii eˆ e. • a i nd ao eˆin ion oo ae  agio ae and ioie ae e 4.11. La Totora Formation ain inea  i  a e oa e inea  e-‚i oˆide  and aaie and  i e a a eo inea ” ‚i o ani ni i ooed  andeii aa a eaion i ea… and e onda inea  ae  o  o ani e ia and a   ee ine edded eeen e an e ‰‹ o e oa o e o in e e en e. ‚e aa ae eddi-io e andeie e o … i ei ie e a ing  agio ae  oie and aa  i aanii o  ig  oi e a ing ioie and dieinaed eidoe. eˆ e o aiona ei e and agda e. ‚e eno  oeond o oˆene and  agio ae 4.8. San Félix Formation i iee eˆ e and e go nda i a oi ii  o a  inegan a i  agio ae oˆene and ‚e o ai deoi ae ine edded in e o iine. ‚e g a i a eed o  oie and e-‚i ain  i i i ai o … e en e e e 1†74” oˆide. e onda inea  eeen  o 15‹ i a 1†•5” a aa e al., 2013” Va e“o 2014  o e o … i a inea  eidoe and a ie and e oeond o eniee i … ed o ai i e a ing  agio ae a ie in i oein a ie and a  . ‚e o ani o … ae agena and eo ie i ing ei e. ‚e e ia ae andeii eˆ e and o a  e aˆii  i i i a eaion ae ed in ooiion. ‚e a eeen 15 o 40‹ o e aiˆ and  agio ae eno  ae e a ed e oa o e. ‚e ae aa i oi and  ei ie and a ine ein i ed i ei ie a oi eˆ e  agio ae eno  iee ioie and  a o  e o …. eˆ e and g a e a ed   oie and e-‚i oˆide. ‚e aiˆ i ii a in ooiion. ‚e 4.9. Montegrande Granite o … ae a eed o a ie  a and a inea . a ie i e a ing  agio ae eno  and i ‚e onegande ganie i an ƒƒ„ e ongaed ein e i  a. in ie i an aea o ca. 1‰ … 2 aada 1†•4 . ‚e ganie i a oiooi ine igan a and 4.12. Carrizal Bajo Plutonic Complex and i ooed  a …a i e da  a  agio ae Algodones Granite and ino ai o e inooˆene ioie and ie i a.  …a i e da i aneda and e - ‚ee  oni odie ae a ae ei ed ii  i e ai o e i ineiia  aneda and dii ion in e oaa odi ea „e …ne e oen in de oˆidied oˆene ioie and ie al., 200‰” ˜a o and „e …ne 200• ig. 1 . ‚e i a ae a o ineiia . €o a  e ai o e i a e o e  godone ganie oeond o o ee  e a ed   oie i ino ioie. edi  gained  a dioie i  agio ae ‚e  agio ae i  eda  i ino e onda  a inooˆene and ioie. ‚ee io ogie ei ie and oen i ied  a ie. ae  ig o ong  a eed 5 o 40‹ o   oie and ai o e e a e inooˆene eidoe and 4.10. La Laguna Gabbro  oie e a e ioie and  agio ae a  ae e a ed  ei ie and a inea . ‚e a e  oni o a o … i e  nded o e aia —a“o  oni o eˆ oeond o ee in diaee odoi and one“o o edi  o ine gained e igan a ioie oloa e al.
Andean Geology 44 (2): 147-178, 2017 157

ona ie and ganodioie and ai o e ona ie. o o de  a o … d ing aga geneaion ‚e ae  ig o odeae  a eed i  oie o eo ion. ‚i age i in ageeen i e and eidoe e a ing ai inea  and ei ie geo ono ogi a daa eio   eoed i  and a inea  e a ing e da. ange e een 1†2•11 and 215.‰•1.4 a —oo… e al., 1†•7” Že˜ e al., 2014 . n e ae o e €a 4.13. Dikes €ag na a o a e ™7-11   a aii aion  e ‚iai aga i a o a i…e  o e in e ‚e ae a ia o … i  oii eˆ e e o … eˆi i a ioda age dii ion i ea… and aa i -andeii o andeii in ooiion. a 21•.•••.3 a and 2‰5.0•2.4 a. Že˜ e al. ‚e eno  ae in ia   agio ae i 2014 eoed an age o 255.2•1.• a  ee odeae a eaion o ei ie and a inea  a o di aded  o o nge ing e-gain age e-‚i oˆide and oˆene i  i oen a eed a ca. 215 a and 225 a. „e eeoe in… a o ai o e and  oie. e €ae ‚iai age i a  a i e dae o igneo  a iaion o e ga oi o … a o g oe 5. Geochronological results and interpretation  a aeia ig ae een aii aed in e o e. ooe ono og daa ae een  ied e e ee o o o e  died o … ni ee 6. Geochemistry ain e al., 1†††” „e …ne e al., 200‰” a aa e al., 2013” Že˜ e al., 2014” eiˆe e al., 201‰” a“o and a e e een a ndan e o e ™i and eino 2015” a aa and o oa 201‰  died o ani and  oni o … ae ied in and  aied in ‚a e 1. n i o… o  a e ‚a e 2 and in a aa e al. 2013 . io o e o a in ie o … ni ee e e ed o - de iion o e geo ei a e  e i e o daing in igneo  i on ig. 3 . ‚e deai ed e  e e onda a eaion o ee a ae ed e ae ied in e endiˆ 2.  died o … i addeed. ™ne a e o e  ana ni ™7-15  e ia en o e an o –n  oni o eˆ 6.1. Alteration di a an age dii ion aen i a ing e-ea… o i  e e eiaed age i 2†7.0•4.0 a. ™ne e onda inea  ae e oon in e a e o a od aignaed o €o ‚i o  on  died a e ee ‚a e 1 and endiˆ 1 . ‚e ™7-13 a o ie ded a ing e-ea… age dii ion a eaion inea  in e o ani o … an e  o aen i a e eiaed age o 2†0.3•3.0 a. e 25‹ o e oa o e o e o … eea in n o ae ee ae no di odan age o e  oni o … i genea  e an e 10‹ i indiid a gain. ‚e age o e  ana ni agee oe eˆ eion  o 40‹  godone ganie . i eio  eoed daa ƒai e al., 1†•5” Že˜ ‚e eˆ eion ae: a e V-12-105 € ano de e al., 2014” a…ae e al., 2014 . n ona e o o ae ed  a i i iied o ie o o ii €o ‚i o  on a een eoe aigned o e   o i  e e ognied o e o e onda ngag š  e ni ƒai e al., 1†•5 and daed a  a ea e e •5‹” a e V-12-3• an 215.‰•1.† a Že˜ e al., 2014 di odan i e ˜ iˆ oaion  a ii   i a oa o e e  o ained in i o… 2†0.3•3.0 a . ien o a eaion inea  ain  e onda  a o a ee ae no o nge ing e-gain age eie 3†‹” o  a e o oaa odi ea in ie on odan o di odan in e ana ed a e i V-12-†1 V-12-†2 V-12-†3 and V-12-03 i dii  o di ad e e  o ained o a e i oa o e o a eaion inea  anging o ™7-13  i i oi e a i doe no e ong o e 2‰ o 12‹ eing  oie e ain e onda ae” €o ‚i o  on in e e oe daa oin o a €ae and o  a e o e o a  oni o eˆ ‚iai ae an ‡a  eian age. ‚-1‰4 ‚-173 ‚-1•4 ‚-1†1 i oa ™n e oe and a e ™7-07 o e o e o a eaion inea  anging o 2‰ o one gande anie ie ded a e eiaed age 12‹ eing ei ie e ain e onda ae. n o 214.‰•1.5 a i one ing e gain age o addiion ee a e o o ai o … a e 2‰0.3•25.2 a  ggeing oi e aii aion V-12-3• and V-12-4†  an ˜ iˆ oaion” 15• Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

380 360 0.060 07-15 0.056 07-13

0.056 0.052 320 340

0.052 0.048 U U 238

238 280 0.048 300 0.044 Pb/ Pb/ 206 206 0.044 0.040 240 260 Concordia Age 296.9 ±3.1Ma Concordia Age 290.3 ±3.0 Ma 0.040 MSWD = 0.094 0.036 MSWD = 0.095 Probability = 0.76 Probability = 0.76 0.036 0.032 0.05 0.15 0.25 0.35 0.45 0.55 0.65 0.0 0.2 0.4 0.6 207 Pb/ 235 U 207 Pb/ 235 U 320 340 07-13 Final Age = 297.0 ±4.0 Ma 07-15 310 330 Mean = 297.0 ±3.1 [1.1%] 2 σ 0 of 21 rej. MSWD = 0.53 Probability = 0.96 300 320

290 310 Best age Best Best age Best 280 300

270 290 Final Age = 290.3 ±3.7 Ma Mean = 290.3 ±3.0 [1.0%] 2 σ 280 260 0 of 18 rej. MSWD = 1.4 Probability = 0.12 270 250 . 0.050 0.054 . 300 07-11 Concordia Age 214.7 ±1.7Ma 320 07-07 0.050 0.046 MSWD = 1.8 280 Probability = 0.18 0.046 0.042 U 280 260 238 U 0.042 Pb/ 238 240

0.038 206 Pb/ 0.038 240 206 220 0.034 0.034 200 200 0.030 0.030 180

0.026 0.026 0.0 0.1 0.2 0.3 0.4 0.0 0.1 0.2 0.3 0.4 0.5 207 Pb/ 235 U 207 Pb/ 235 U 07-11 232 280 Final Age = 265.0 ±2.4 Ma Final Age = 214.6 ±2.5 Ma 276 [92%] 2 σ 0 of 8 rej. MSWD = 1.7 07-07 Mean = 214.6 ±1.7 [0.77%] 2 σ 228 272 Probability = 0.11 0 of 20 rej. MSWD = 1.4 Probability = 0.13 268 224 264 220 260

224 216 Best age Best Best age Best 220 212

216 Final Age = 218.1 ±8.3 Ma 208 212 Mean = 218.1 ±8.0 [3.7%] 2 σ 0 of 4 rej. MSWD = 0.0 204 208 Probability = 1.0 200

. 3. ‚ea-„ae g on odia and eiaed e - age  o o ana ed a e e onging o e  ana ni ™7-15  e €o ‚i o  on ™7-13  e €a €ag na a o ™7-11 and e onegande anie ™7-07 . oloa e al.
Andean Geology 44 (2): 147-178, 2017 15†

TAB LE 2. XRF AND ICP-MS GEOCHEMICAL DATA FOR THE ANALYZED SAMPLES.

Sample CPV-12-105 CPV-12-12 CPV-12-127 O7-15 O7-10 O7-11 SCL-02q Unit € ano de € ano de € ano de  ana ni €a €ag na €a €ag na o a  oni o o ae —ed o o ae —ed o o ae —ed a o a o o eˆ Lithology o ie a ie ‚  o ii ‚ona ie a o a o onoganie UTM East 2•‰402 2•†0•4 2•7052 3‰‰1‰3 3†‰451 3†‰2‰‰ 410†4• UTM North ‰7•†103 ‰7†45‰2 ‰7†233• ‰‰†705‰ ‰‰‰†570 ‰‰‰††13 ‰•04†‰4

SiO 2 % ‰7.42 72.24 ‰•.71 5‰.25 47.44 4‰.25 77.72 TiO 2 •0.01 0.1‰ 0.2• 0.75 1.4• 1.25 0.0† Al 2O3 †.50 †.•7 12.41 13.33 17.0• 17.30 11.•† Fe 2O3 0.00 0.77 0.‰5 0.•3 0.†5 1.04 0.1† FeO 0.00 1.53 1.31 5.55 ‰.35 ‰.†2 0.3• MnO 0.04 0.0‰ 0.04 0.0† 0.0• 0.0• 0.05 MgO 0.1• 0.53 0.5• 3.24 4.21 4.72 0.0• CaO 0.31 1.13 1.23 5.57 10.70 †.5† 0.27

Na 2O 3.†‰ 2.10 2.35 2.‰‰ 2.72 2.51 3.†2 K2O 4.‰1 3.53 3.†1 2.0‰ 1.00 1.40 3.†4 P2O5 0.02 0.05 0.0‰ 0.1† 0.‰3 0.•† 0.02 LOI 12.7† 7.†• •.45 7.34 7.7• •.0‰ 0.40 Total % †•.•2 ††.†‰ ††.†• †7.•7 100.43 100.01 †•.†5 La ppm 4.3 3•.0 3•.‰ •.4 27.2 2‰.3 13.3 Ce ‰.† ‰‰.7 ‰7.‰ 31.† 5‰.0 53.5 25.5 Pr 1.4 ‰.1 11.1 3.2 7.2 5.1 2.† Nd •.0 2†.• 2•.1 1•.0 31.4 2•.4 10.0 Sm 1.• ‰.1 5.5 4.3 7.0 ‰.0 1.† Eu 0.4 1.3 1.0 1.0 2.4 1.7 0.3 Gd 1.† 5.• 5.1 4.3 ‰.7 5.7 1.‰ Tb 0.3 0.† 0.† 0.7 1.0 0.• 0.3 Dy 1.• 5.2 4.7 4.1 5.‰ 4.‰ 2.1 Ho 0.4 1.1 1.0 0.• 1.1 0.† 0.5 Er 1.0 3.2 3.1 2.4 3.0 2.5 1.3 Tm 0.1 0.5 0.5 0.3 0.4 0.3 0.2 Yb 0.† 3.2 3.4 2.2 2.‰ 2.1 1.‰ Lu 0.1 0.5 0.5 0.3 0.4 0.3 0.2 Y 7.‰ 20.0 1•.5 1•.• 2†.4 14.• 14.1 Sc 1.‰ 5.5 ‰.4 13.0 1•.• 12.7 2.0 Hf 1.2 2.• 3.3 0.‰ 5.1 3.0 2.2 Nb 4.1 †.• †.† 7.‰ •.1 ‰.4 †.5 Ta 0.3 0.7 0.† 0.5 0.4 0.4 1.0 Th 5.1 13.7 27.7 4.2 ‰.0 ‰.4 •.‰ Zn 117.• 5•3.1 20.1 5†.7 •2.4 74.4 •30 Co 0.4 3.5 3.3 17.† 44.3 25.7 •1 Ni •.0 3.0 2.1 24.3 37.† 33.4 •20 Ba 2††.• 2075.‰ ‰24.0 377.2 427.† 431.0 ‰77.0 Cr 53.1 15.2 ‰.† 1•.• 1•.• 22.4 •20 V 11.1 2.‰ 27.2 2•.7 12.0 10.2 75.0 Se 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Br 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Cu 15.3 3.‰ 4.3 •.• 52.• ‰0.4 10.0 Sr 44.7 1‰7.1 ‰7.1 23‰.3 530.• 420.2 42.0 Zr 21.† 72.5 •5.2 5.† 21†.2 11•.2 ‰1.0 Rb 3•.• 153.3 177.1 54.7 1†.2 2‰.2 13•.0 As 0.0 0.0 0.0 0.0 0.0 0.0 •5 Be 0.0 0.0 0.0 0.0 0.0 0.0 3.0 Sb 2.1 0.5 1.2 0.1 0.† 0.3 0.4 Sn 2.3 ‰.1 7.† 4.5 3.‰ 3.• 1.0 U 1.‰ 2.‰ 3.2 1.7 1.• 1.• 2.3 W 1.• 2.3 2.5 5.4 0.• 0.7 1.2 Bi 0.0 0.0 0.0 0.0 0.0 0.0 •0.1 Cd 0.1 0.1 0.0 0.0 0.0 0.0 0.0 Cs 1.‰ 2.3 14.‰ 2.0 3.1 2.5 2.0 Ga ‰.† 33.1 17.4 1•.4 27.4 20.0 13.0 Ge 0.1 0.4 0.4 0.† 1.3 1.1 2.• In 0.0 0.0 0.0 0.0 0.0 0.0 •0.1 Mo 0.† 0.1 0.2 1.2 0.5 0.4 •2 Pb ‰1.5 4.1 12.2 15.† 11.† 10.3 †.0 Ag 0.0 0.0 0.0 0.0 0.0 0.0 1.2 Tl 0.0 0.0 0.0 0.0 0.0 0.0 0.7 1‰0 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

Table 2 continued.

Sample SCL-09q CPV-12-38* CPV-12-49b* CPV-12-23 CPV-12-24 CPV-12-60 SCL-26q* Unit o a  oni an ˜ iˆ an ˜ iˆ €a ‚ooa €a ‚ooa €a ‚ooa €a ‚ooa o eˆ oaion oaion oaion oaion oaion oaion Lithology ‚ona ie ‚  ii ‚  ii ndeie ndeie —aa  ‚  UTM East 410.315 3‰2.530 35†.174 37‰.4•4 3•3.333 3•2.34• 414.172 UTM North ‰.7†4.•‰5 ‰.77•.‰57 ‰.•05.415 ‰.•14.323 ‰.•2‰.71• ‰.•27.‰55 ‰.•0•.0‰4

SiO 2 % ‰•.47 •‰.5† 72.23 5‰.‰1 43.0‰ 44.•1 •1.32 TiO 2 0.4‰ 0.17 0.14 1.34 1.5• 1.10 0.11 Al 2O3 14.55 5.40 13.20 14.‰1 1‰.33 15.21 †.†3 Fe 2O3 1.02 0.00 0.25 1.‰1 1.•1 1.43 0.40 FeO 2.54 0.00 0.50 5.3• †.05 7.1‰ 0.7† MnO 0.07 0.02 0.03 0.11 0.1† 0.14 0.01 MgO 1.43 0.12 0.‰2 2.17 †.0† •.†‰ 0.15 CaO 3.4‰ 0.13 0.27 5.57 7.50 •.•‰ 0.57

Na 2O 3.5† 0.31 1.•‰ 3.55 3.77 4.•2 1.‰† K2O 2.†2 1.†5 3.50 1.30 0.0• 0.2† 3.7‰ P2O5 0.10 0.00 0.03 0.43 0.37 0.33 0.01 LOI 1.1‰ 5.1• 7.34 7.31 7.17 ‰.•1 1.†4 Total % ††.7• ††.•7 ††.†† ††.†† ††.†† ††.†2 100.‰† La ppm 23.7 •.† 37.• 2‰.1 1.3 •.† 31.2 Ce 44.3 31.0 73.4 52.• ‰.3 2•.5 ‰2.• Pr 5.0 2.• 12.0 5.1 0.• 3.7 7.2 Nd 1•.1 13.7 32.‰ 2•.4 5.0 17.7 2‰.• Sm 3.4 3.0 7.0 ‰.2 1.4 3.‰ 4.• Eu 0.• 0.‰ 1.4 2.0 0.5 1.1 0.3 Gd 2.7 3.3 ‰.• ‰.3 1.4 3.3 3.‰ Tb 0.5 0.‰ 1.1 1.0 0.2 0.5 0.7 Dy 2.‰ 3.2 ‰.7 5.‰ 1.3 2.3 4.2 Ho 0.5 0.‰ 1.3 1.1 0.3 0.4 0.† Er 1.7 1.‰ 3.† 3.2 0.7 1.‰ 2.‰ Tm 0.3 0.2 0.5 0.4 0.1 0.1 0.4 Yb 1.‰ 1.4 3.‰ 2.• 0.‰ 1.0 3.1 Lu 0.3 0.2 0.5 0.4 0.1 0.1 0.4 Y 15.• 12.1 42.• 33.3 2.5 13.3 24.5 Sc †.0 2.1 4.• 12.0 ‰.2 20.5 3.0 Hf 4.• 1.1 4.• ‰.0 2.7 1.† 4.5 Nb ‰.7 ‰.‰ 15.‰ †.3 3.7 4.• 11.† Ta 0.‰ 0.3 0.† 0.5 0.2 0.2 0.† Th •.7 5.† 27.2 3.1 0.3 2.0 14.‰ Zn 50.0 †.4 20.1 †2.† 101.‰ 114.‰ • 30 Co 7.0 2.1 1.1 1‰.1 43.4 35.1 • 1 Ni • 20 3.7 ‰.7 5.1 102.1 153.7 • 20 Ba 7†4.0 4‰7.• 1‰‰2.7 3†1.7 17.• 43.4 471.0 Cr • 20 1‰.4 17.2 5.7 103.• 550.• • 20 V 157.0 15.0 7.5 4.† 203.• 120.‰ ‰.0 Se 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Br 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Cu 30.0 3.0 2.2 1•.1 7‰†.• 7.• • 10 Sr 24†.0 ‰.‰ 151.0 444.2 14‰.5 1††.2 41.0 Zr 1•†.0 1†.• †•.• 2•0.7 127.• 7•.† 127.0 Rb 111.0 105.1 13‰.• 20.• 0.1 3.2 105.0 As • 5 0.0 0.0 0.0 0.0 0.0 • 5 Be 2.0 0.0 0.0 0.0 0.0 0.0 2.0 Sb 0.3 13.3 0.3 0.0 0.2 0.1 0.4 Sn 2.0 4.3 •.† 3.† 2.5 1.1 4.0 U 1.‰ 1.1 3.7 0.7 0.2 0.1 2.2 W 2.3 1.• 1.‰ 0.3 0.2 0.1 1.5 Bi • 0.1 0.0 0.0 0.0 0.0 0.0 • 0.1 Cd 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Cs 2.7 21.1 2.7 0.5 0.0 0.• 2.3 Ga 1‰.0 14.3 33.• 20.5 13.7 1‰.3 11.0 Ge 2.5 0.1 0.3 1.0 1.• 1.2 1.4 In • 0.1 0.0 0.0 0.0 0.0 0.0 • 0.1 Mo • 2 0.2 0.4 0.† 0.3 0.3 • 2 Pb 13.0 2.5 12.† •.† 10.4 †.3 17.0 Ag 2.0 0.0 0.0 0.0 0.0 0.0 2.2 Tl 0.7 0.0 0.0 0.0 0.0 0.0 1.0 oloa e al.
Andean Geology 44 (2): 147-178, 2017 1‰1

Table 2 continued.

Sample O7-13 O7-07 O7-06 CPV-12-91A CPV-12-91B CPV-12-93 CPV-12-92 Unit €o ‚i o one ande one ande aia —a“o aia —a“o aia —a“o  godone ni ni  oni o eˆ  oni o eˆ  oni o eˆ anie Lithology anie anie anie ioie ‚ona ie anodioie ioie  o i a UTM East 3‰•.473 3‰1.047 357.424 301.52‰ 301.52‰ 2••.•5† 2†•.03• UTM North ‰.‰†5.†42 ‰.‰‰‰.7‰1 ‰.‰‰•.‰30 ‰.••4.54‰ ‰.••4.54‰ ‰.•7•.‰34 ‰.••7.501

SiO 2 % ‰7.•0 ‰7.42 74.31 51.74 ‰•.22 ‰7.•3 53.‰1 TiO 2 0.0• .d. . 0.0• 1.33 0.41 0.12 0.†1 Al 2O3 12.71 †.50 †.53 12.‰2 •.73 10.44 13.5† Fe 2O3 0.35 0.15 .d. . 1.5‰ 1.04 0.37 1.73 FeO 1.15 1.02 .d. . 7.7† 2.0† 0.74 5.7‰ MnO 0.0‰ 0.04 0.03 0.11 0.05 0.04 0.10 MgO 0.52 0.1• 0.20 4.23 0.52 0.33 4.3‰ CaO 1.•5 0.31 0.‰1 7.32 2.20 1.01 ‰.21

Na 2O 3.41 3.†‰ 2.7‰ 2.•• 2.70 3.‰3 3.1• K2O 1.†1 4.‰1 4.70 1.44 1.25 3.†‰ 1.5• P2O5 0.07 0.02 .d. . 0.50 0.11 0.07 0.2‰ LOI †.44 •.03 •.†3 •.44 12.54 11.12 •.‰2 Total % ††.3‰ †5.24 101.14 ††.†‰ ††.•7 ††.‰5 ††.†0 La ppm 25.† 45.5 5.2 11.3 57.1 11.5 †.• Ce 44.1 •‰.‰ 7.2 42.4 10‰.‰ 3•.† 3‰.1 Pr 4.‰ 12.1 0.† 4.† 1‰.‰ 3.2 3.‰ Nd 1‰.7 3•.4 3.† 24.0 45.1 15.7 1†.7 Sm 2.• •.2 0.‰ ‰.1 •.5 3.† 4.5 Eu 0.† 0.† 1.4 1.‰ 1.5 0.5 1.1 Gd 2.4 7.5 0.5 ‰.‰ 7.† 4.2 4.2 Tb 0.3 1.1 0.1 1.2 1.1 0.• 0.‰ Dy 1.3 ‰.1 0.3 7.0 5.2 4.7 3.‰ Ho 0.2 1.2 0.1 1.4 1.0 1.0 0.7 Er 0.‰ 3.4 0.2 4.2 2.• 3.0 2.0 Tm 0.1 0.5 0.0 0.‰ 0.4 0.5 0.3 Yb 0.5 3.2 0.2 3.† 2.4 3.3 1.• Lu 0.1 0.5 0.0 0.‰ 0.4 0.5 0.3 Y 4.3 25.• 1.1 43.0 2‰.0 33.‰ 12.3 Sc 2.1 1.† 2.0 17.4 3.• 2.‰ 10.† Hf 0.3 0.† 0.3 1.3 2.• 2.4 0.7 Nb ‰.‰ •.5 7.5 14.3 ‰.1 ‰.• 4.0 Ta 0.4 0.4 0.4 0.• 0.3 0.‰ 0.3 Th 3.2 3.4 2.1 7.7 55.• 14.4 4.2 Zn 55.‰ 72.0 1‰.2 ‰7.† 22.2 31.‰ ‰1.† Co 1.† 0.2 0.5 23.• 3.4 2.4 21.1 Ni 3.2 1.3 2.7 31.2 3.‰ 3.† 30.3 Ba 5†•.5 505.0 15‰1.‰ 233.0 432.† 231.4 214.0 Cr 112.1 4.7 ••.† 74.1 5.• 5.5 ‰•.4 V 2.† 1.2 1.0 1•2.• 22.‰ 7.1 17•.4 Se 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Br 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Cu 3.2 1.2 3.1 24.4 3‰.‰ 2.7 44.† Sr 335.† •.• 101.1 20‰.‰ 130.3 50.0 31•.† Zr 3.7 •.0 ‰.1 25.‰ 102.1 74.7 7.3 Rb 30.3 37.7 121.0 33.1 27.‰ 234.2 1•.2 As 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Be 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Sb 0.1 0.1 0.0 0.3 0.2 0.0 0.1 Sn 1.† 3.4 1.1 3.† 5.‰ 10.3 3.0 U 0.4 0.7 0.3 1.‰ 1.7 3.• 0.7 W 0.2 0.2 0.4 0.• 0.5 0.2 0.4 Bi 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Cd 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Cs 1.3 0.† 1.4 0.‰ 0.† •.2 0.3 Ga 20.1 21.• 27.4 17.3 17.7 15.2 14.• Ge 0.4 0.4 0.1 1.1 0.5 0.3 0.• In 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Mo 0.3 0.‰ 0.1 0.4 0.5 0.4 0.3 Pb 15.‰ 15.4 2†.• •.5 14.† 20.5 5.5 Ag 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Tl 0.0 0.0 0.0 0.0 0.0 0.0 0.0

ong aeed oania i a e i ino ii onen. 12 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

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Andean Geology 44 (2): 147-178, 2017 1Š3

A) Q B)

3 Peraluminous Metaluminous

2 T o n a Al/(Na+K) l it e

1 Peralkaline Monzogranite Granodiorite Q z - D io Qz- r it Qz-Monzonite Monzodiorite e A P 0 Monzonite Monzodiorite Gabbro 0.1 1.0 1.5 2.0 Diorite C) D) Al/(Ca+Na+K) 16 Phonolite 14 Phonolite 1 Com/Pant Tephri- 12 phonolite Rhyolite Trachyte Rhyolite 10 Phono-

O Trachyte Tephrite 2 2 Trachy- andesite Trachydacite .1 8 Rhyodacite/

O+K Basaltic

Tephrite or Zr/TiO 2 trachy- Dacite TrachyAnd Basanite andesite

Na Trachy- 6 basalt Andesite Bsn/Nph 4 .01 Dacite Basaltic Andesite Andesite/Basalt 2 Picro- basalt Basalt andesite SubAlkaline Basalt Alk-Bas

0 .001 40 45 50 55 60 65 70 75 .1 1 10 SiO 2 Nb/Y Chanchoquin Complex (t) Chollay Complex (gd) Montegrande and Los Tilos granite (g)

Chanchoquin Complex (gd) Chollay Complex (g) Colorado granite (g) Carrizal Bajo Complex (gd) Guanta Unit (t) Chollay Complex (t) La Laguna gabbro (gb) Algodones granite (g) Pintado tonalite (t) Permian Dike San Félix Fm. Middle Triassic Dike Llano Chocolate Beds Guanaco Sonso Fm. Chollay Complex (gb) La Totora Fm.

Pennsylvanian Cisuralian Lopingian Lower-Middle Triassic Upper Triassic

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a ond 1. 1Š4 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

10 3 Chanchoquin Plutonic Complex Guanta Unit 10 2 Q El Pintado Tonalite 10 2

10 1 10 1

10 0 10 0

Chollay Plutonic Complex La Laguna Gabbro 10 2 10 2

10 1 10 1

Colorado, Montegrande, Los Tilos, 10 0 Carrizal Bajo & Algodones 10 0

Llano Chocolate Beds Guanaco Sonso Fm 10 2 10 2

10 1 10 1

San Félix Fm La Totora Fm 10 0 10 0

Permian dike Middle Triassic dike 10 2 10 2

10 1 10 1

10 0 10 0 Ce Nd Sm Gd Dy Er Yb Rb Th Nb K Ce Pr P Zr Eu Dy Yb LaLa Pr Pm Eu Tb Ho Tm LLuu CCss Ba U Ta La Pb Sr Nd Sm Ti Y LuLu

‚•. 5. ide diag a
o ond ie-no ai•ed a e ea  e and  iiie ane-no ai•ed  ig  ae eeen
a ndane in e
died o
. o ai•ing ae
a e  o n and Œ“onog 1†…†. “a
ed ine
e e
en e o
 ong ae ed
ae
o oania
i o
 o e an ‡i V-12-3… and a oo a -2Š• o aion. oloa e al.
Andean Geology 44 (2): 147-178, 2017 1Š5

2.0 30

25 1.6

20 1.2 N /Yb N

La 15 Eu/Eu* 0.8 10

0,4 5

0,0 0 200 250 300 200 250 300 Age (Ma) Age (Ma)

‚•. Š. ge e •/•Ž and a / o e
died
ae
.  €•• ae
no ai•ed o ond ie a ndane
n and Œ“onog 1†…†.  o
i da
ed ine
and oo g adien e e
en e o
 ong ae ed
ae
o oania
i o
 o e an ‡i V-12-3… and a oo a -2Š• o aion.

7. Discussion e ooed  on•og anie and g andio ie ig. 4a. Ve  e a
i in 
ion

 a
ga o o 7.1 . Sources and evolution of the proto-Andean dio ie a e ond aong e
died in 
ie ni
magmatism ig. 4a. ‚n e eoni di
 iinaion diag a
o ea e e al. 1†…4 nea  a
ae
o in e
died o
a e e  ee ogeneo
o e ”Voani   • anie• ied ig. 7d . „n e og aia and  o ei a o eeen o
ae
o e oo ado enog anie ni a e oo
iion. e  ae eeen
onen i
a
o o
ide i
ae n oing in e ied o ”iin a ia e  e di
a
iia geoeia ae n
ae agai
• ig. 7d. e.g., €••
gge
ing nio  eia eaio e oo ado enog anie e a agna ig. 5. ‚n a ia  e a ed en ien in ‚• •a o and e Œoneg ande g anie a e aong e oe • i
 e
en in a e
ide diag a
o in 
ie ni
i aaine iin ae aini a ig e 5 o o oni and oani o
. e a e de
 i ed in e ie a e a ada 1†…1 1†…2‹ oani o
a e a
 aaine and o iin e 1†……‹ a
i e al., 1†…5‹ Œodo•i
and ‰a 1††2 a-aaine ied o e Œ diag a ig. 7a.  a
e e
enaie
o e ’e  ia

i agai
.  one o e a
i and ine ediae
ae
V- aing ino aon e oo ado enog anie and 12-24 o e a oo a o aion ae a
o • e a oo a o aion
ae
ana•ed in i
onen
e e
enaie o a-aaine ainiie

d i i
ea a aaine agai
 did o ig. 7  and e o e aidi o
o in e ied o d ing e ’e  ia

i in e  e
en-da  ona a  g anie
a
ed on ei ‚• and • onen
o die a. ‚
oe and a ea di
 i ion oee  ig. 7 e. og e n e o ana•ed oani
ee o e
igniian o e e
 ied ig. 1 an o
doe
no ao a o 

ai
ia ana
i
 i i
a o e a-aaine agai
 a
i a
 oo
ed noeo  o oin o a e o i
e e eni e eo e and i anno e on
ide ed a
e e
enaie e og ai ange o
 aaine oani
  o o e ain agai een
o e
a i a
a o oie
and e e i
no ioda di
 i ion e oninena  
 d ing e  ia

i. e o igin in ei oo
iion ig. 4 d. e oni o
o i
aaine agai
 a e eaed o e a
o a ioda di
 i ion o ei oo
iiona e
a i
en o e a  in e  e
en-da oa
a ange
 and onaie i
e o
 a ndan ioogia o die a 
ee eo. 1ŠŠ Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

AFeO* B Hf/3

A = N-MORB B = E-MORB C = OIB (Rift) D = Arc-basalts A Tholeiitic

B D

Calc-Alkaline C

Alk MgO Th Nb/16 C D 100 100

WPG WPG 10 10 syn-COLG syn-COLG Ta Ta

1 1

VAG ORG ORG

VAG .1 .1

.1 1 10 100 .1 1 10 100 Yb EYb F

1000 syn-COLG 1000 syn-COLG WPG WPG

100 100

Rb Rb

10 ORG 10 ORG

VAG VAG

1 1 10 100 1000 10 100 1000 Y+Nb Y+Nb

‚•. 7. eoni di
 iinaion diag a
o e
died
ae
. A . Œ ‚ ine and ˆa aga  1†71 and B. - - o a
i and ine ediaed oani o
‹ e a diag a ea e e al., 1†…4 o C. aid oani and D.
oni o e  eae e al., 14 o E. aid oani and D.
oni o.  o i daed ine and oo gadien e
een e o ong aeed a
e o oaniai o o e an i V-12-3 and a €ooa  -2•‚ oaion. oloa e al.
Andean Geology 44 (2): 147-178, 2017 1•7

ƒ oani o ae ig
o
ii„ a e a onainaion o e aga oe ggeing a
o a  eeaed ae onen o e deeaed eadi o e a onieo o e aga a aoed a go oe neaion €iai. €i i in ageeen i e egiona
io o oaie inii ii o degaing aan eenion a od ae aen
ae a oninena and …nd„ 2000 †ine„ 2010. €e  i‡io agin a i a een
o
oed  eea ao
eene o agneie a e ain e-€i oide  ai e al., 15 Œ
odo‹i and ao„ 1 inea
ae in o
oni and oani o Œ
odo‹i and Ža„ 12 and an ao e eaed i ao an indiao o ae eeaed  ˆ2 ondiion o a inning ine a / o €iai o in e aga …ddingon and inde„ 1•4. ae oe an ei eian one
a ig. • . ‰daed inea  a a
i oe and ioie €e deeae o a a o
onen in e aga o in a e
eoga
i ange o e
oni oe ding e €iai eeoe gge a e o„ o ga o o enoganie„ i i an geoeia ignae o e died o anno ndo ed eidene a e aga ee daed. e oe ai ed o eiage o
aia eing €ee
eoga
i and geoeia
aen ae o a a
ooi oed ding e •ondana oen ine
eed a e e o -eing o an oogen o eaie. aeno
ei ane oe„ a
oe a a ae
ae a onegen agin ee an oeani 7.2. Tectonic framework for the Triassic
ae i  ded nde e oninen en„ 2002 magmatism: passive or active continental and eeene eein. margin? Š e agai oe a indeed a de
eed ane„  e‡en eaoai‹ed  id a en ode o e eoni eing o e o enied i in o ie eeen eeaed  inea ƒeian agin ding e €iai„
o
oe a eadon o daed inea o e  ded  dion eaed o i a igniian diinied a „ en an aiiaion o e oninena  de o go a eeniona oe o
eaing on e ding e aen o  ane-deied e i eoni
ae a i ie Œ
odo‹i and ao„ ie ‰ide and Œoo a„ 1„ e
eia 1 o o
ed ino a o oiion de o aeion eae e aid o
onen in e
oni o an aoono eain o e oninena agin and oani o ae oeia doinan. Œ
odo‹i and Ža„ 12. •idene 

oing €e  dion-eaed ignae i
een in ee ode oe o o ied geoog and o
eaino and eaino inie„ geoei o eian o €iai o o

ing ggeing a  igna i no on deied o o in ie and ƒgenina. ‰oee„ in ig o e

a aiiaion. •en og ig iˆ 2„ a 2ˆ„ een 
daed geoogia aoga
 and e

Ž2ˆ and •• onen ae o eed„ eidene o oe o  geoeia daa ae o eean aiona ai‹aion ae no enie o
ed o ni„ aenaie eoni eing anno e ed i igna. o ea
e e o i e ige o •e e e al., 201•. •• onen a e aaeii negaie •- €e ine o eidene o e eeniona-eing anoa aoiaed o aionaion o
agioae ode in
een-da ƒgeninean eio ae in ding aga dieeniaion €a e 2. €e degee a: a. e eiene o ge oe o aid o a aiiaion ding e €iai  ae agai geneia eaed o a anaei„ een„ oee„ eied o a ea oe an a e
eened  e oioi go
„ a ni a i oaed o e aeo‹oi agai. €i i ineed o aong e eaen an o e ƒnde„ eeen 20‘ e aina onen o e
oni o„ i i and 40‘  a ’a and ao„ 10„ 15 a ’a genea oe o e oa and oe €iai e al., 13„ 2003 b. e geneaion o aai o inie an o e eian
on ig. 4 . ƒ o aaine o iin
ae geoeia ignae„ iia 
oei a een
eened  ‰e e geneia eaed o e a age o e oioi al. 2014 and de e e al. 201• o e
oni •o
agai ao and Ža„ 11„ c. e o o e ona odiea a e ae aide edienoogia and a aeo o i o e
een d. …aed on e o
ed aiaion aii in e o and Šigaao ain„ o o eeen 17• ‰/ 177 ‰ and d1 ˆ and e ai‹aion age oe o “

e €iai age 
aei„ 17 
aei o ‹ion o ee ni„ ee ao onded e al., 200• •ia iagi and Œa ’ne‹„ 200 •ia iagi 1• Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)... e al., 2011 and d e
eoogia„ edienoogia ongoing
oe a ea ni e €iai and did and a aeo o i„ and  dion- no o

io o e a onieo a i a een eaed„ aii o e “

eo €iai- oe
o
oed eoe aada e al., 1 ”ai e-o go
o e e‡n …ain in €e dieene in e agai
od a ƒgenina 
aei„ 17 an‹ee and 
aei„ o ide o e ƒndean ange ae  i
oan 2001 …ei e al., 2010 •••ia e al., 2012a„ . and a o ie diin
aen o io
ei ƒong e een an o e ƒnde and e eoion ding e €iai. Šn e oninena oea egion o noen ie eeen 2 and ineio„ eing o e io
ee inded a 31– „ oee„ e agai  ni a an e eaed anaei de o aen o e aeno
ei ane o i aii ae ae. …ioda agai i geneaing e deeo
ed †-oiened de
oene a o ina
ae ignae a een e
oed in a aoodaed e i deoaion 
aei„ e Œidde o “

e €iai iidangi oaion 17 a ’a e al., 2003 •ia iagi e al., 2011. Œoaa e al., 2000 and in e ia’ o
e €e geoeia and
eoogia aaeii aada e al., 11„ 1 a e oaa odiea o e oani and
oni o died in i o no ena ie and ioda inion o
a
e ong gge a e ee geneaed in a “

e €iai age ad ong een eogni‹ed in e  dion eing and e  dion a a onino ona odiea —2-30–  aada„ 12„ 1
oe a geneaed o o e agai in e ai e al., 15 Œ
odo‹i and Ža„ 12 ‰e e a egion ig. a. al., 2014. Šn o ae„ e oe o agai i eied o e oa oe o oani and 7.3. Permian to Triassic margin architecture in
oni o e €iai
eiod ee ig. 1. oe the studied segment o e eian o oe €iai oani ni a ae onideed o e e‡iaen o e oioi •o
•en og eidene 

oing e idea a  a €a a„ ananoo and •anao ono/ao oninena agin a  ˜eed o aie  dion …ano oaion do no ei i geoeia o an oeani
ae ding e €iai ae een eae o eenie a oni ion„ eoe„ oeed o
eoog and geoei„ e e aaia e ioo
i daa o e ieae„ od aiee o e 
a- dion ‹one i i ao e 
oei o ied aga oe„ a ndeeined. €e ano de ooae ed ae de
eed ane and e oninena  aada„ een ine
eed a oea agai oed 2013 ‰e e al., 2014 •e e e al., 201•. ding e eian eae o ei oaion oe ƒaine and/o oeiii aa aoiaed o e o e oea aeiona
i eie e al., ae age o i aid agai„ and oon 201•. •ien e ee and o
oiion o e ine
eed a d
iiie oani eing ano‡in and oa
oni o
ee oae o o degee o deo
eion eing o e gained„ ain ganodioii o onaii„ ioie and aending aeno
ei ane in a i one„ on ende- eaing inie„ e an e ine
eed i no ond. …aai and aai-andeii o a e
eenaie o e oo o an aie oninena a od oe
ond o i aii ae dei ed agai a deeo
ed o e eian o e in ni  a e a €ooa„ a €enea and Œidde €iai ie e al., 15 ie„ 13 ‚e ada de aie oaion in e eodiea †ine„ 2010. €e €iai •anao ono and ao and ona odiea eeen 27– and 30– „  …ano oaion od en e
een aoe e a aaine geoeia ignae and ei
a o e a egion„ and e an i oaion age i onained o e ae €iai ee„ od e
een a
oia oea ain a a 174 i a e al., 1 …ano„ 1• one˜o and aie a ea ni e •a €iai. …o ni Œ
odo‹i„ 17„ oe an 20 Œa ae eaing o ae o
oed o oii oani o iia e oioi-eaed aid oani  a ’a e al., in ee and o
oiion o e  dion-eaed 13. een o ae e
oed €iai age o Œioene o een aid oani e
aed in e oe o e aeiona
i in noeno ie ae egen o e ƒndean a Ža and Œ
odo‹i„ a‡e e al., 2014„ ggeing a geneaion o 2001„ 2002 Ža e al., 2013. an aeiona edge a e e o  dion €e a €ooa oaion on e oe and„ i o an oeani
ae a e oninena agin a an o
oed o oe ndieeniaed oani and oloa e al.
Andean Geology 44 (2): 147-178, 2017 1•

Early to Middle Triassic

Guanaco Sonso Fm W Chollay Plutonic Complex E San Félix Fm Cuyo-Ischigualasto basins

Late Triassic

La Totora Fm WLatest Triassic - Jurassic Arc E Colorado Syenogranite & other intrusives Carrizal Bajo Putonic Complex Cuyo-Ischigualasto basins & Algodones Granite

Š•. . o
oed eoni eing o e €iai agai a 2–-30–15•  in e o ƒeian agin.

eied o e oian-aeian„ aog i i and i e‡iaen oge and ‰aeo„ eain e  dion-eaed geoeia and 1 ioia e al., 10 ioia„ 14
eoogia ignae. •ing e “

e €iai  gien e ignae o e oaa odiea
oni odie i aaine o iin
ae ainiie
oni odie died in i o„ e a ee inded  a agna •a o„ ooado ae een e e o e eaie a aii in enoganie„ Œonegande ganie. €e daa e
een-da oaa egion. eoe„ een
eened in i d indiae a ee ni ao die ae e
oed aeian oani in e ae e geoeia ignae o a aga„ 
oaa
odiea a 20-22  e  eda e al., aong i e a €ooa oaion e o
ie 2014 .
ange in  e geoe o  e ded e ie ae
io o e ea ien o e a i o ee o in eoni ondiion o  e  e a e oaa odiea ding e ‰eangian ae a a e inded  i in  e a o o Œ
odo‹i and ao„ 1 aada e al., 1  e ona
odiea o  e
oaa
odiea ig.  . €e i
e o e e-non ea   e eie iing an oigin o   iing ƒndean a ae e
eened  e a ega oaion i e nnon. 170 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

8. Concluding remarks References

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ani eeied: a‚ 20 201•Š eied/ae ed: ‘oee 21 201•Š aai a e on ine: ‘oee 21 201•. oloa e al.  Andean Geology 44 (2): 147-178 , 2017 175

APPENDIX 1. SUMMARY OF THE PETROGHRAPHIC DESCRIPTION OF THE STUDIED SAMPLES.

Sample Lithology UTM Unit Igneous components Alteration minerals EN Phn Gls Lith Gdms Mtr TOTAL Pl Qz Ort Mic Bt Amp Mv Cpx Opx Ol Indet Opa Sph Ap Rut TOTAL Q A P Cc Ser Chl Ep Qz Prh Cl Bt Fe-mx TOTAL

‰V-12-105 Œ ‚o i e 2•402 •7103 † ano de oo a e ’ed 0.05 000.5 0100.15 000000000.05 0000 0.20 0.00 0.00 0.00 0.12 0000.•5 000.03 0 0.0 ‰V-12-12 ai e 204 •745•2 † ano de oo a e ’ed 0.4 0.2 0 0.4 010.05 0.4 0.3 000000000000 0.75 0.00 0.00 0.00 0 0.1 0.1 0.02 0.02 0000.01 0.25 ‰V-12-127   ‚o i i 27052 •7233 † ano de oo a e ’ed 0.4 000.• 010.11 0.3 0.21 0 0.05 0000000000 0.7• 0.00 0.00 0.00 0.1 0.02 0.01 0 0.0 000.01 0.02 0.24 -04 ona i e 37402 •25547 an o‡n ‰  oni o e… 1000 0 10.4 0.5 0.005 0 0.03 0 0.01 00000.02 000 0.• 0.55 0.00 0.44 0 0.02 0.01 0.01 00000 0.04 -310 ‹anodioi e 3•43 •0157 an o‡n ‰  oni o e… 1000 0 10.33 0.37 0.1• 0 0.01 0 0.02 00000.005 0.005 00 0.0 0.43 0.1 0.3 0 0.04 0.03 0.02 000.01 00 0.10 -311 ‹anodioi e 3•707 •02740 an o‡n ‰  oni o e… 1000 0 10.3 0.31 0.15 0 0.025 0.035 000000.015 0.005 00 0.3 0.3• 0.1 0.4• 0 0.05 0.02 000000 0.07 -340 ona i e 374514 •25••1 an o‡n ‰  oni o e… 1000 0 10.37 0.3 0.05 0.05 0.01 0000000.01 000 0.7 0.45 0.12 0.44 0.03 0.0• 0.03 000.01 00 0.13 -1 ona i e 3700 •3077• an o‡n ‰  oni o e… 1000 0 10.37 0.37 0.1 0000.0 00000.01 000 0.3 0.44 0.12 0.44 0 0.0• 0.01 000000 0.07 -70 ona i e 37452 •1537 an o‡n ‰  oni o e… 1000 0 10.3 0.5 0.005 0 0.025 0 0.01 0.01 0000.015 0 0.005 0 0.• 0.5• 0.01 0.44 0 0.02 0 0.02 000.005 00 0.04 -71 ona i e 374343 •2307• an o‡n ‰  oni o e… 1000 0 10.•2 0.2 0.02 0 0.03 0.0 000000.02 000 0.7 0.24 0.02 0.74 0 0.01 0.01 000.01 000 0.03 -23• ona i e 3•25 •7405 an o‡n ‰  oni o e… 1000 0 10.41 0.3• 0.0 0000.02 00000.04 000 0.2 0.42 0.10 0.4 0 0.07 0000.01 000 0.0 -334 ona i e 37340 •22573 an o‡n ‰  oni o e… 1000 0 10.4 0.35 0.05 0000.04 00000.015 000 0.• 0.44 0.0• 0.50 0 0.13 00000.015 00 0.15 -337 ona i e 37321 •22372 an o‡n ‰  oni o e… 1000 0 10.• 0.02 0.02 000.1 000000.02 000 0.4 0.03 0.03 0.4 0 0.05 0.1 0.01 00000 0.1• 07-15 ona i e 3••1•3 ••705• ‹an a ni 1000 0 10.34 0.3 0 0.01 0.11 0.1• 000000000 1.00 0.52 0.01 0.47 000000000 0.00 -• i•e 3741 •25•44 i•e- an o‡n ‰  oni o e… 0.1 000. 010.45 0.45 0.005 000000000000 0.0 0.00 0.00 0.00 0.01 0.0 0000000 0.10 -1•0 ona i e 35024 •153• •eada • ‰in ado ona i e 1000 0 10.37 0.51 0.005 0 0.035 0 0.02 00000.01 0 0.005 0 0.5 0.5 0.01 0.42 0 0.03 0.01 0.01 00000 0.05 -202 ona i e 40347 •252 •eada • ‰in ado ona i e 1000 0 10.5• 0.22 0.005 0 0.04 0.0 000000.02 0.01 00 0.4 0.2 0.01 0.71 0 0.03 0.01 0.01 0 0.01 000 0.0• -2• ona i e 35541 •1575 •eada • ‰in ado ona i e 1000 0 10.5 0.24 0.04 0 0.03 000.01 0000.01 000 0.2 0.2 0.05 0.• 0 0.05 0.01 0.01 000.01 00 0.0 -7 ona i e 4020• •1320 •eada • ‰in ado ona i e 1000 0 10.45 0.4 0.005 0 0.03 0000000.01 000 0. 0.52 0.00 0.4 0 0.01 0.01 000000 0.02 -213 ai e 352 •2454 ‹anao ono ƒ 0.15 0 0.5 0010.55 0.0 0000000000.02 000 0.•5 0.00 0.00 0.00 0.05 0 0.0 0.05 0.15 000.02 0 0.35 -21• ’aa 35•• •2•02 ‹anao ono ƒ 0.15 0 0.5 0010.• 00000.04 0 0.01 0000.1 000 0.75 0.00 0.00 0.00 0.05 0 0.1 00000.1 0 0.25 -13 ’aa 31425 •32423 ‹anao ono ƒ 001 0 10.7 00000000000.05 000 0.75 0.00 0.00 0.00 0.05 0 0.1 00000.1 0 0.25 -14 Œ ‚o i e 31157 •32231 ‹anao ono ƒ 0.4 0.1 0.5 00100.55 0.15 000000000.05 000 0.75 0.00 0.00 0.00 0.05 0.05 0.05 0000.1 00 0.25 -2• ’aa i andei e 3212 •3127• ‹anao ono ƒ 0.15 000.5 010.72 00000.12 000000.03 000 0.7 0.00 0.00 0.00 0 0.0• 0.02 0000.05 00 0.13 07-10 ‹ao 3•451 •••570 †a †agna ‹ao 1000 0 10.•5 0.01 0.05 00000.2 0000.0 000 1.00 0.01 0.07 0.2 000000000 0.00 07-11 ‹ao 3•2•• •••13 †a †agna ‹ao 1000 0 10.53 0.02 0.05 00000.25 0.05 000.05 000 0.5 0.03 0.0 0. 0 0.02 0.03 000000 0.05 -22 ‹anodioi e 3350 •2773 o a‚ ‰  oni o e… 1000 0 10.335 0.37 0.1•5 0 0.035 0.02 000000.01 000 0.4 0.43 0.1 0.3 0 0.05 0.01 000.005 000 0.07 -1• ‹anodioi e 3135 •73400 o a‚ ‰  oni o e… 1000 0 10.3• 0.53 0.02 0 0.015 0 0.02 00000.005 000 0.5 0.5 0.02 0.40 0 0.04 0.01 000000 0.05 -1 ‹anodioi e 3337 •2451 o a‚ ‰  oni o e… 1000 0 10.35 0.5 0.05 0 0.03 0000000.01 000 0.4 0.5• 0.0• 0.3 0 0.04 0.01 0.005 0 0.005 000 0.0• -237 ‹anodioi e 3047 •050•3 o a‚ ‰  oni o e… 1000 0 10.44 0.41 0.05 0 0.01 0000000.015 0 0.005 0 0.3 0.4• 0.0• 0.4 0 0.04 0.015 0.01 0 0.005 000 0.07 -24 ‹anodioi e 34 •3231 o a‚ ‰  oni o e… 1000 0 10.4 0.34 0.07 000000000.02 000 0.3 0.42 0.0 0.4 0 0.15 00000.02 00 0.17 -1•0 ‹anodioi e 30014 •2•44 o a‚ ‰  oni o e… 1000 0 10.55 0.27 0.03 0 0.02 0.02 000000.02 000 0.1 0.32 0.04 0.•5 0 0.0• 0.03 000000 0.0 -11 ‹anodioi e 3•550 •0042 o a‚ ‰  oni o e… 1000 0 10.415 0.3 0.04 0 0.0• 0.025 000000.01 000.005 0.4 0.4• 0.05 0.50 0 0.045 0.005 0.01 0 0.005 000 0.07 -1’ ‹anodioi e 3337 •2451 o a‚ ‰  oni o e… 1000 0 10.47 0.3 0.04 0 0.035 0000000.015 000 0.4 0.43 0.04 0.53 0 0.05 0.01 000000 0.0• -154 ‹anodioi e 402037 •145 o a‚ ‰  oni o e… 1000 0 10.4 0.37 0.07 0 0.035 0000000.01 0.005 0.002 0.003 0. 0.40 0.0 0.53 0 0.005 0 0.01 00000 0.02  †-02 onˆogani e 4104 •04•4 o a‚ ‰  oni o e… 1000 0 10.25 0.33 0.32 0 0.02 0 0.01 00000.01 000 0.4 0.37 0.3• 0.2 0 0.03 0.005 000.01 0.01 0 0.005 0.0• -14•„ onˆogani e 401•3 •72472 o a‚ ‰  oni o e… 1000 0 10.245 0.37 0.2 0 0.01 0 0.005 00000.015 000 0.3 0.41 0.31 0.27 0 0.04 0.015 0.005 000.015 00 0.0 -15 onˆogani e 3740 •147• o a‚ ‰  oni o e… 1000 0 10.27 0.3 0.2• 0.05 0.01 0 0.01 00000.015 000 0.2 0.34 0.35 0.31 0 0.045 0.02 0.005 000.015 00 0.0 -1•1 onˆogani e 33442 •1523 o a‚ ‰  oni o e… 1000 0 10.2 0.33 0.2• 0 0.015 0 0.015 00000.015 000 0.3 0.3 0.30 0.33 0 0.035 0.015 0.01 000.015 00 0.0 -1• onˆogani e 37555 •72323 o a‚ ‰  oni o e… 1000 0 10.2 0.3 0.21 0.0 0.02 0 0.005 00000.015 000 0.2 0.43 0.34 0.23 0 0.05 0.01 0.005 000.015 00 0.0 -1 onˆogani e 404 •2131 o a‚ ‰  oni o e… 1000 0 10.25 0.3 0.3 0.07 0.02 0000000.01 000 0.5 0.33 0.40 0.27 0 0.03 0.01 0000.01 00 0.05 -233 onˆogani e 403253 •27221 o a‚ ‰  oni o e… 1000 0 10.25 0.335 0.305 0000.02 00000.015 000 0.3 0.3 0.34 0.2 0 0.0• 0.005 0000.01 00 0.0 -20 onˆogani e 32242 •2713 o a‚ ‰  oni o e… 1000 0 10.315 0.2 0.25 0.03 0.005 0000000.01 000 0.4 0.32 0.34 0.34 0 0.04 0.025 000000 0.07 17• Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

Appendix 1 continued.

Sample Lithology Location Unit Igneous components Alteration minerals EN Phn Gls Lith Gdms Mtr TOTAL Pl Qz Ort Mic Bt Amp Mv Cpx Opx Ol Indet Opa Sph Ap Rut TOTAL Q A P Cc Ser Chl Ep Qz Prh Cl Bt Fe-mx TOTAL

-233 onˆogani e 403253 •27221 o a‚ ‰  oni o e… 1000 0 10.25 0.335 0.305 0000.02 00000.015 000 0.3 0.3 0.34 0.2 0 0.0• 0.005 0000.01 00 0.0 -20 onˆogani e 32242 •2713 o a‚ ‰  oni o e… 1000 0 10.315 0.2 0.25 0.03 0.005 0000000.01 000 0.4 0.32 0.34 0.34 0 0.04 0.025 0 00000 0.07 -21 onˆogani e 32172 •243 o a‚ ‰  oni o e… 1000 0 10.25 0.325 0.27 0.02 00000000.03 000 0.0 0.3 0.34 0.2 0.01 0.045 0.03 0.01 00 0.02 00 0.12 -24 onˆogani e 35•1 •154 o a‚ ‰  oni o e… 1000 0 10.515 0.2 0.0 0.02 0.005 0000000.015 000 0.4 0.32 0.12 0.5• 0 0.025 0.02 0000.02 00 0.07 -0 onˆogani e 3•37 •7424• o a‚ ‰  oni o e… 1000 0 10.1 0.3 0.3• 0.02 0.005 0 0.005 00000.005 000 0.7 0.41 0.40 0.1 0 0.02 0.005 0000.01 00 0.04 -’ onˆogani e 3244 •1375 o a‚ ‰  oni o e… 1000 0 10.22 0.53 0.1• 0.02 0.03 0000000.01 0.005 00 0. 0.57 0.1 0.24 0 0.02 0 0.005 00000 0.03 -17 onˆogani e 3••3 •75057 o a‚ ‰  oni o e… 1000 0 10.22 0.34 0.3 0.04 000.005 00000.015 000 0.2 0.3 0.3 0.24 0 0.045 0.015 0.005 00 0.015 00 0.0  †-0 ona i e 410315 •74•5 o a‚ ‰  oni o e… 1000 0 10.4 0.3 0.1 0 0.035 0.07 000000.015 0.015 00 0.4 0.3 0.13 0.50 0 0.045 0.01 0000.01 00 0.07 -1•4 ona i e 374 •10101 o a‚ ‰  oni o e… 1000 0 10.53 0.21 0.005 000.0 000000.035 0.005 00 0.• 0.2 0.01 0.71 0 0.1 0.03 0.01 00000 0.14 -1•7 ona i e 3447 •0455• o a‚ ‰  oni o e… 1000 0 10.52 0.15 0.005 0 0.04 0.17 000000.02 0 0.005 0 0.1 0.22 0.01 0.77 0 0.04 0.02 0.01 0 0.02 000 0.0 -173 ona i e 3135 •72135 o a‚ ‰  oni o e… 1000 0 10.37 0.2 0.005 000.11 000000.03 0.01 0.01 0 0.73 0.35 0.01 0.•4 0 0.13 0.1 0.02 0 0.02 000 0.27 -250 ona i e 3425 •77022 o a‚ ‰  oni o e… 1000 0 10.4 0.3• 0.01 0 0.04 0 0.03 00000.01 000 0.3 0.42 0.01 0.5• 0 0.0• 0.01 0 00000 0.07 -255 ona i e 32332 •71 o a‚ ‰  oni o e… 1000 0 10.45 0.3• 0.02 0 0.045 0 0.04 00000.01 000 0.• 0.42 0.02 0.5• 0 0.035 0.005 0 00000 0.04 -300 ona i e 3535 •73507 o a‚ ‰  oni o e… 1000 0 10.57 0.22 0.005 0 0.05 0.05 0 0.02 0000.02 000 0.3 0.2 0.01 0.72 0 0.0• 00 00.01 000 0.07 -35 ona i e 32•7 •717•5 o a‚ ‰  oni o e… 1000 0 10.5 0.2 0.005 0 0.075 0000000.01 0 0.005 0 0.5 0.32 0.01 0.•7 0 0.04 0.005 0.005 00000 0.05 -13 ‹ao- ioi e 375•0 •0033 o a‚ ‰  oni o e… 1000 0 10.54 0.03 0.02 0 0.07 0.22 000000.01 000 0. 0.05 0.03 0.2 0 0.1 0 0.005 0 0.005 000 0.11 ‰V-12-3–  i i 3•2530 •77•57 an ƒ i… ƒoa ion 0 0.1 0.• 0 0.3 1 0.1 0.2 0000000000000 0.30 0.00 0.00 0.00 0 0.1 0 0.0• 0.4 0 0.1 0.02 0.02 0.70 ‰V-12-4–  i i 35174 •05415 an ƒ i… ƒoa ion 0.3 0.3 00 0.4 1 0.15 0.3 0.05 000000000000 0.50 0.00 0.00 0.00 0 0.15 0.1 0 0.2 0000.05 0.50 -75„  andei i 35175 •02•1• an ƒ i… ƒoa ion 0.15 0.05 0.15 0 0.•5 1 0.22 0.2 00000.02 00000.02 000 0.54 0.00 0.00 0.00 0.02 0.1 0.1 - 0.2 0 0.03 0 0.01 0.4• -212„  350 •031•0 an ƒ i… ƒoa ion 0.1 0.05 0.1 0 0. 1 0.03 0.35 0.01 000000000.005 000 0.40 0.00 0.00 0.00 0.15 0.2 0.05 0 0.2 0000 0.•0  †-14 ienogani e 417451 •7• o oado ‚enogani e 1000 0 10.24 0.35 0.2• 0.025 0.02 0000000.015 000 0.1 0.40 0.33 0.27 0 0.04 0.01 0.01 00 0.03 00 0.0 -4 ienogani e 32 •0•2 o oado ‚enogani e 1000 0 10.1• 0.43 0.33 0.01 000.01 00000.01 000 0.5 0.4• 0.37 0.17 0 0.03 0.01 0000.01 00 0.05 -74 i•e 352• •0257• i•e-an ƒ i… ƒoa ion 0.1 000. 010.5 0.02 0.005 000000000000 0.•0 0.00 0.00 0.00 0.05 0.0 0.2 0.02 00 0.05 00 0.40 -3„  andei i 3•440 •257 †a o oa ƒoa ion 0.1 0.0 0.2 0 0.53 1 0.05 0.02 0.03 000.02 00000.0 0.03 000 0.23 0.00 0.00 0.00 0 0.3 00 0.35 0.02 0.1 00 0.77 -1•   ‚o i i 3721 •373• †a o oa ƒoa ion 0.1 0.07 0.3 0 0.53 1 0.0• 0.01 000000000.05 0.02 000 0.14 0.00 0.00 0.00 0.03 0.2 0.0 0.05 0.45 0 0.05 00 0.• -11 „ndei e 37•3 •113 †a o oa ƒoa ion 0.2 000. 010.75 00000000.03 0000.03 00 0.1 0.00 0.00 0.00 0.1 0 0.02 0000.05 0 0.02 0.1 -10 „ndei e 32312 •372 †a o oa ƒoa ion 0.05 000.5 010.2 000000000000.1 00 0.2 0.00 0.00 0.00 0.07 000 000.01 00 0.0 ‰V-12-23 „ndei e 37•44 •14323 †a o oa ƒoa ion 0.05 000.5 010.7 0000000.1 0000.05 000 0.5 0.00 0.00 0.00 0000 00000.15 0.15 ‰V-12-24 „ndei e 33333 •2•71 †a o oa ƒoa ion 0.05 000.5 010.52 00000.03 0000.03 0.1 0000 0.• 0.00 0.00 0.00 0.07 0 0.1 000000.15 0.32 ‰V-12-•0 ’aa 3234 •27•55 †a o oa ƒoa ion 0.• 0.32 00 0 10.7• 00000000000.0• 000 0.2 0.00 0.00 0.00 0.0 000 000.1 00 0.1  †-2•‡–  414172 •00•4 †a o oa ƒoa ion 0.05 0.03 0.02 0 0. 1 0.02 0.03 000000000.05 0.01 000 0.11 0.00 0.00 0.00 0.2 0.1 0.02 0 0.5 0 0.07 00 0. -•2 Œ ‚o i e 3•31•5 •2370• †a o oa/an ƒ i… ƒoa ion 0.4 0.02 0.05 0 0.53 1 0.15 0.15 000000000.02 0.02 000 0.34 0.00 0.00 0.00 0.07 0.1 0.01 0 0.45 0 0.03 00 0.•• -175   ‚o i i 3•2224 •141• †a o oa/an ƒ i… ƒoa ion 0.15 0.1 0.4 0 0.35 1 0.55 0.0 000000000.1 0.03 000 0.7• 0.00 0.00 0.00 0.02 0.05 0.05 0 0.05 0 0.02 0 0.05 0.24 -43 ’aa 3•223 •11342 †a o oa/an ƒ i… ƒoa ion 0 0.1 0 0. 010.•3 000000000.02 0.05 0.05 000 0.75 0.00 0.00 0.00 0.1 0.05 0.1 0 00000 0.25 07-07 ‹ani e 3•1047 ••••7•1 on e ‹ande ni 1000 0 10.15 0.3 0.4 0 0.04 0.07 0 0.04 0000000 1.00 0.35 0.47 0.1 0000 00000 0.00 07-0• ‹ani e 357424 ••••30 on e ‹ande ni 1000 0 10.25 0.3 0.1 0.2 0.03 0.05 00000.05 0000 0. 0.35 0.35 0.2 0 0.01 0.01 0 00000 0.02 07-13 ‹ani e ”o-ia 3•473 ••542 †o i o ‹ani e 1000 0 10.27 0.3• 0.14 0 0.1 0.07 0.0• 00000000 1.00 0.47 0.1 0.35 0000 00000 0.00 ‰V-12-1„ ioi e 30152• •454• aiˆa ’a€o ‰  oni o e… 1000 0 10.3 0.15 0.003 000.2 000000.03 000 0.77 0.2 0.01 0.72 0 0.02 0.1 0.01 00 0.1 00 0.23 ‰V-12-1’ ona i e 30152• •454• aiˆa ’a€o ‰  oni o e… 1000 0 10.34 0.3 0.004 0 0.0 0000000.02 0.02 00 0.4 0.52 0.01 0.47 0 0.02 0.03 0.01 00 0.1 00 0.1• ‰V-12-3 ‹anodioi e 25 •7•34 aiˆa ’a€o ‰  oni o e… 1000 0 10.43 0.2 0.14 0 0.1 0000000000 0.5 0.33 0.1• 0.51 0000 000.05 00 0.05 ‰V-12-2 ioi e 203 •7501 „ godone ‹ani e 1000 0 10.34 0.0 0.005 0 0.03 000.12 0000.02 000 0.•0 0.21 0.01 0.7 0 0.1 0.1 0.05 00 0.15 00 0.40

a e i ing e inea oonen  o e  died o• e…eed a — o o e o e o a o•.  e i and id •„† o n ee o e o a aon o igneo and a ea ion oonen  ee ie ‚ een in e o• egad e o e doain in ” i e‚ o.  e eond •„† o n ee o e dieen igneo inea  de e a e a io a e. n e ae o  anei i o• igneo ‚ a  ae i ed in e o n ˜ eno‚ ™. Phn : ‰ eno‚ Š Gls : ‹ aŠ Lith : †i iŠ Gdms : ‹ondaŠ Mtr : a i…Š Pl :  agio aeŠ Qz : ‡a ˆŠ Ort : o o aeŠ Mic : io ineŠ Bt : io i eŠ Amp : a io eŠ Mv : oi eŠ Cpx :  ino‚o…eneŠ Opx : o o‚o…eneŠ Ol : o iine Indet Š ai nde einedŠ opa : oa‡e inea nde einedŠ Sph :  eneŠ Ap : aa i eŠ Rut :  i eŠ Q: ‡a ˆŠ A: a •a ine e daŠ P:  agio ae o  ei•een  aiia ion o  anei i o• ”i — o ai inea  nde 0—Š Cc : a i e/aona e nde einedŠ Ser : eii eŠ Chl :  oi eŠ Ep : eido eŠ Qz : ‡a ˆ  a edon‚ ao o i iaŠ Prh : e ni eŠ Cl :  a‚ inea Š Bt : io i eŠ Fe-ox : ƒe o…ide/ ‚do…ide. – e‚ a ea ed a e ” i ae no eaa ed i i agen . oloa e al.  Andean Geology 44 (2): 147-178 , 2017 177

APPENDIX 2. U- Pb GEOCHRONOLOGIC ANALYSES.

Sample: 07-07 UTM N 6,666,761 UTM E 361,047 Unit Monte Isotope ratios Apparent ages (Ma) Grande Unit Analysis U 206 Pb/ 204 Pb U/Th 206 Pb*/ 207 Pb* ± (1 σ) 207 Pb*/ 235 U* ± (1 σ) 206 Pb*/ 238 U ± (1 σ) error 206 Pb*/ 238 U* ± (1 σ) 207 Pb*/ 235 U ± (1 σ) 206 Pb*/ 207 Pb* ± (1 σ) Best age ± (1 σ) Conc (ppm) (%) (%) (%) corr. (Ma) (Ma) (Ma) (Ma) (Ma) (%)

07-07-1 š› 527.541 702.0• 0.•2 1.72• 1.340 0.231 2.353 0.033 1.35 0.22 20.745 3.2 211.15 4.4• 22•.3 30.•2 20.745 3.2 ‘„ 07-07-11 š› 122.51• 2321•.10 1.014 1.174 7.222 0.23 7.70• 0.033 2.• 0.34 20.12 5.554 21•.77 15.044 22.105 1•5.112 20.12 5.554 ‘„ 07-07-12 š› 3•.523 1157.•• 0.0 1.•2 1.4 0.233 2.1•0 0.033 0.55 0.3• 210.•5 1.772 212.4 4.151 23.45 45.734 210.•5 1.772 ‘„ 07-07-1 š› 111.3 1730.740 0.54 21.17• 12.•14 0.217 12.31 0.033 2.45 0.220 210.7 5.05 1.04 23.32 •0.535 301.57 210.7 5.05 ‘„ 07-07-1 š› 125.70 23574.•4 0.100 1.550 10.3•5 0.235 10.•03 0.033 2.234 0.211 211.27• 4.•44 214.300 20.47 247.•45 23.14 211.27• 4.•44 ‘„ 07-07-17 š› 40.04• ••.117 0.7 20.37• 37.154 0.227 37.407 0.034 4.343 0.11• 212.4•5 .077 207.50• 70.31• 151.557 .347 212.4•5 .077 ‘„ 07-07-2 š› 710.42 7005•.25 1.135 1.35 1.42 0.233 1.30 0.034 1.27 0.•72 212.00 2.717 213.004 3.70 214.10 33.10• 212.00 2.717 ‘„ 07-07-10 š› 10.002 1147.45 0.0 1.14 5.33• 0.234 5.5 0.034 2.41 0.422 213.11 5.203 213.44 11.331 21•.721 123.•1• 213.11 5.203 ‘„ 07-07-15 š› 25.7 17254.335 0.7•1 1.04 4.3•3 0.244 4.7• 0.034 1.24 0.403 213.7•2 4.044 221.72 .4 307.130 .405 213.7•2 4.044 ‘„ 07-07-3 š› .72 5747.337 0.4• 21.7•• 15.35 0.214 15.71 0.034 3.514 0.223 213.•5 7.32 1•.•35 2.21 -5.33 373.0•3 213.•5 7.32 ‘„ 07-07-13 š› 73.5 4070.21 0.•33 1.02 3.757 0.244 4.2•0 0.034 2.007 0.471 214.044 4.225 221.537 .47 301.75 5.•77 214.044 4.225 ‘„ 07-07-4 š› 0.•0 140.41• 1.121 1.730 13.507 0.23• 13.2 0.034 3.3• 0.244 214.04• 7.151 215.04 27.002 22•.47 313.37 214.04• 7.151 ‘„ 07-07-21 š› 40.•4 4403.0•0 0.5 1.54 4.013 0.23 5.251 0.034 3.3• 0.•45 214.177 7.132 21•.•52 10.244 243.•5• 2.51• 214.177 7.132 ‘„ 07-07-1• š› 3•.005 3420.5• 0. 1.22 2.70• 0.23• 2.42 0.034 1.155 0.32 214.•75 2.43 214.7•4 5.•5 215.745 •2.•72 214.•75 2.43 ‘„ 07-07-7 š› 17••.257 101433.027 0.03 1.731 0.•3 0.23 1.50 0.034 1.•5 0.70 215.•5 3.•01 21•.40 3.07 22•.3•2 22.2• 215.•5 3.•01 ‘„ 07-07-5 š› 1•0.727 52113.7 0.47 1.75 •.57 0.23 •.775 0.034 1.55 0.234 217.752 3.34 217.43 13.2 220.002 152.543 217.752 3.34 ‘„ 07-07-• š› 574.4•2 1530•0.3• 0.31 1.7•4 2.03 0.243 2.40 0.035 1.414 0.570 220.553 3.0•5 220.725 4.20 222.55• 47.130 220.553 3.0•5 ‘„ 07-07-14 š› 705.414 14144.051 1.10 1.45• 1.7 0.247 3.407 0.035 2.43 0.34 220.13 •.174 224.1 •.54 25.725 43.155 220.13 •.174 ‘„ 07-07- š› 40.47 234.03• 0.71 1.443 2.15 0.250 2.•1 0.035 1.43 0.5•• 223.21 3.254 22•.514 5.31• 2•0.23 4.57 223.21 3.254 ‘„ 07-07- š› 4.33 1131.5•2 0.74 22.15 13.423 0.215 13.•13 0.03• 2.2•7 0.1•7 225.04 5.014 17.43 24.43• -120.155 332.327 225.04 5.014 ‘„ 07-07-20 š› 1•7.2• 233•.70 2.4•• 1.325 .071 0.310 12.7•3 0.041 .7 0.775 2•0.270 25.221 274.17 30.•7• 34.•1 11.2 2•0.270 25.221 ‘„

Sample: 07-11 UTM N 6,669,913 UTM E 396,266 Unit La Laguna Isotope ratios Apparent ages (Ma) Gabbro Analysis U 206 Pb/ 204 Pb U/Th 206 Pb*/ 207 Pb* ± (1 σ) 207 Pb*/ 235 U* ± (1 σ) 206 Pb*/ 238 U ± (1 σ) error 206 Pb*/ 238 U* ± (1 σ) 207 Pb*/ 235 U ± (1 σ) 206 Pb*/ 207 Pb* ± (1 σ) Best age ± (1 σ) Conc (ppm) (%) (%) (%) corr. (Ma) (Ma) (Ma) (Ma) (Ma) (%)

07-11-3 š› •.4 133.• 0.70 1.4• 7. 0.23 .•32 0.034 3.503 0.40• 21•.14 7.4• 21•.42 1•.30 212.57 13.002 21•.14 7.4• ‘„ 07-11-4 š› 7.44 10004.•45 0.• 1.34 .4•0 0.245 10.207 0.034 3.34 0.37• 21.151 .225 222.737 20.417 271.442 217.25 21.151 .225 ‘„ 07-11-2 š› 7.47 14457.1 0.55 1.711 2.310 0.241 2.73 0.034 5.1 0.11 21.23 11.15 21.17 5•.02 22.702 ••5.15 21.23 11.15 ‘„ 07-11-1 š› 120.• 7•2.23 0.52 20.3•3 11.025 0.234 11.45• 0.035 3.114 0.272 21.145 •.70 213.•0 22.072 153.017 25.• 21.145 •.70 ‘„ 07-11-• š› 444.310 541.510 1.•25 1.503 2.••3 0.21 3.111 0.041 1.•0 0.517 2•0.22 4.105 25.522 7.125 253.122 •1.245 2•0.22 4.105 ‘„ 07-11- š› 1147.112 14043.702 0.3 1.17 0.5 0.27 2.2• 0.041 2.075 0.0 2•1.213 5.313 2•4.23 5.31 21.•10 21.03 2•1.213 5.313 ‘„ 07-11-7 š› 1353.111 7•20•.•24 0.50• 1.350 0.71 0.2 1.•4 0.042 1.43 0.00 2•4.531 3.45 2•5.21• 3.47 271.255 1•.4•7 2•4.531 3.45 ‘„ 07-11-10 š› 150.211 3•723.••3 0.50• 1.332 0.•7• 0.301 1.•1 0.042 1.471 0.0 2••.102 3.34 2••.51 3.7 273.40 15.471 2••.102 3.34 ‘„ 07-11-11 š› 113.445 747143.10 0.572 1.375 0.73 0.300 2.121 0.042 1.33 0.11 2••.331 5.042 2••.52• 4.71 2•.21 20.011 2••.331 5.042 ‘„ 07-11-5 š› 300.1•2 40103.777 0.5• 1.3•4 3.55• 0.301 3.2 0.042 1.420 0.371 2•7.132 3.71• 2•7.30 .001 2•.•33 1.57 2•7.132 3.71• ‘„ 07-11-12 š› 147.3 37.13 0.420 1.421 0.71 0.302 3.•41 0.042 3.5• 0.0 2•.21 .37• 2•7.•• .5•7 2•2.4• 1•.50 2•.21 .37• ‘„ 07-11- š› 1•55.44 •523.205 0.43 1.30 0.•72 0.302 1.55 0.042 1.3• 0.3 2•.2 4.25 2•.111 4.•0 2••.4•2 15.451 2•.2 4.25 ‘„ 17 Geochemistry of P ermian to triassic iGneous rocks from northern chile (28º-30º15’ s)...

Appendix 2 continued.

Sample: 07-13 UTM N 6,695,942 UTM E 368,473 Unit Los Tilos Isotope ratios Apparent ages (Ma) Analysis U 206 Pb/ 204 Pb U/Th 206 Pb*/ 207 Pb* ± (1 σ) 207 Pb*/ 235 U* ± (1 σ) 206 Pb*/ 238 U ± (1 σ) error 206 Pb*/ 238 U* ± (1 σ) 207 Pb*/ 235 U ± (1 σ) 206 Pb*/ 207 Pb* ± (1 σ) Best age ± (1 σ) Conc (ppm) (%) (%) (%) corr. (Ma) (Ma) (Ma) (Ma) (Ma) (%)

07-13-• 122.5• 1•21.7 0.71 1.15 10.20 0.323 10.3• 0.044 1.47• 0.142 277.30 4.014 24.010 25.73• 335.14 233.524 277.30 4.014 ‘„ 07-13-1 202.2 42041.32 3.20• 1.04 3.••0 0.320 4.•7• 0.044 2.11 0.•22 27.•1• 7.37 21.•0 11.503 307.1• 3.377 27.•1• 7.37 ‘„ 07-13-15 31.043 741.47 1.13• 1.54• 32.102 0.315 32.27 0.045 3.371 0.104 21.201 .275 277.•73 7.57• 24.051 75•.4•7 21.201 .275 ‘„ 07-13-4 152.2• 11104.75 1.232 1.352 4.4•1 0.31 •.045 0.045 4.00 0.•75 21.2 11.252 20.715 14.2 270.77 102.323 21.2 11.252 ‘„ 07-13-17 20.730 25•1.72 0.71 1.•33 11.470 3.777 11.4 0.045 .442 0.005 22.0 23.302 157.35 ‘„ ‘„ ‘„ 22.0 23.302 ‘„ 40372 120.020 12050.42• 1.4 17.755 14.4• 0.34 15.52 0.045 5.7• 0.371 23.557 1•.051 304.12• 40.74 4•5.07 322.030 23.557 1•.051 ‘„ 07-13-11 1•.431 2515.4 1.32• 23.••5 5.717 0.2•4 •0.54• 0.045 .2 0.1•5 25.20 27.57 237.57 12.4 -211.1 1•37.7 25.20 27.57 ‘„ 07-13-7 42.0•2 11755.700 1.53 21.42 25.7•2 0.25 2•.151 0.045 4.4 0.172 2•.00 12.5•0 254.735 5.2 -24.7•3 •32. 2•.00 12.5•0 ‘„ 07-13-21 5.74 1121.330 0.•20 1.720 1•.5• 0.31 17.3 0.04• 3.5• 0.222 27.27 10.34 20.55 42.•1 227.•71 34.253 27.27 10.34 ‘„ 07-13-12 120.17 27547.24 1.00 1.75 .35 0.31 .32 0.04• 3.1 0.33 2.77 .003 21.230 23.075 21.20 204.77• 2.77 .003 ‘„ 07-13- 541.302 10523.3 3.07 1.35 2.31 0.33 2.51 0.04• 1.15• 0.44• 20.•2• 3.24 25.334 •.•3 332.74 52.5•0 20.•2• 3.24 ‘„ 07-13-14 35.4• •002.5•5 1.50 3.275 102.37• 1.42 102.34 0.04• •.210 0.00• 20.72 17.•53 105.712 ‘„ 347.441 37.4• 20.72 17.•53 ‘„ 07-13-1 57.45• 1•072.54 1.43• 1.0•0 22.43 0.33• 23.425 0.047 5.1• 0.221 23.074 14.5 24.41 5.50 305.737 52•.501 23.074 14.5 ‘„ 07-13-20 121.7 21•0.3 0.72• 1.55 .73 0.32 10.12 0.047 2.2•3 0.223 23.457 •.41 2.2• 25.42 24•.•42 227.0 23.457 •.41 ‘„ 07-13-1• 20.7• •143.120 1.•2 1.47 3.144 0.33 3.33 0.047 1.277 0.37• 23.•04 3.••5 2•.4 .725 31.37 71.44 23.•04 3.••5 ‘„ 07-13-2 7.10 10•11.45 0.•34 21.15 13.712 0.304 14.25 0.047 3.0• 0.274 23.07 11.223 2•.211 33.72 5.5•4 32.107 23.07 11.223 ‘„ 07-13-3 13.5•3 31073.233 1.5•5 1.532 •.410 0.34 7.255 0.047 3.37 0.4• 24.524 .71 303.072 1.012 3•.34 144.532 24.524 .71 ‘„ 07-13-5 11.31 201•3.7• 1.32 1.5• 4.23 0.332 4.•14 0.047 1.• 0.3•• 27.13 4.04 21.021 11.•74 242.175 .7 27.13 4.04 ‘„ 07-13-13 0.57 12•3.201 0. 20.214 13.35 0.323 14.217 0.047 2.20 0.1 2.414 .225 24.341 35.273 170.157 32•.72 2.414 .225 ‘„ 07-13-1 •35.1 23503.11• 0.737 1.773 1.•05 0.352 2.2 0.04 1.•4• 0.71• 301.37 4.53 30•.27• •.07 340.240 3•.340 301.37 4.53 ‘„

Sample: 07-15 UTM N 6.697.056 UTM E 366.163 Unit Guanta Isotope ratios Apparent ages (Ma) Unit Analysis U 206 Pb/ 204 Pb U/Th 206 Pb*/ 207 Pb* ± (1 σ) 207 Pb*/ 235 U* ± (1 σ) 206 Pb*/ 238 U ± (1 σ) error 206 Pb*/ 238 U* ± (1 σ) 207 Pb*/ 235 U ± (1 σ) 206 Pb*/ 207 Pb* ± (1 σ) Best age ± (1 σ) Conc (ppm) (%) (%) (%) corr. (Ma) (Ma) (Ma) (Ma) (Ma) (%)

07-15-5 250.0 4120.23 0.• 1.123 .50 0.331 .54 0.04• 4.10 0.43 2.•3 11.3 2.1 24.01 2.10 1•.043 2.•3 11.3 ‘„ 07-15-15 24.575 45137.14• 1.133 1.••2 5.•2 0.341 •.407 0.04• 3.0•0 0.47 20.•• .• 27.750 1•.53• 353.•44 127.257 20.•• .• ‘„ 07-15-1 22.337 15723.700 1.13 1.422 7.2• 0.34• .•05 0.04• 3.57 0.41• 20.30 10.17 301.351 22.441 32.31 17•.10 20.30 10.17 ‘„ 07-15-2 110.•• 10001.77• 1.357 22.1•5 17.154 0.2 17.37 0.04• 2.7 0.1•7 21.435 .254 25•.733 3.45 -4.34• 41.1 21.435 .254 ‘„ 07-15-1 321.01 2411.15 1.270 1.5 .250 0.32• .37 0.04• 1.50 0.10 21.00 4.303 2•.454 20.35 243.07 10.3• 21.00 4.303 ‘„ 07-15-10 152.24 170•.•75 1.411 17.• .11 0.35 10.051 0.047 2.13 0.217 24.013 •.274 310.770 2•.15 43.445 21.44 24.013 •.274 ‘„ 07-15-11 125.•0• 1375.02 2.35 1.505 1•.745 0.34 1•.7• 0.047 2.0 0.124 24.50• •.043 303.433 44.21 372.•33 37.341 24.50• •.043 ‘„ 07-15-13 224.•30 1•.112 0.5 1.• •.423 0.345 7.305 0.047 3.40 0.47• 24.• 10.023 300.2 1.024 34.153 145.340 24.• 10.023 ‘„ 07-15-7 2•7.170 33•70.104 1.151 1.74 .044 0.345 .144 0.047 1.34 0.147 25.7 3. 300.•2 23.14 33.1 205.211 25.7 3. ‘„ 07-15-• 205.77 12501.551 1.05• 1.5•1 2•.1 0.350 27.21• 0.047 4.•34 0.170 2•.4•1 13.427 304.424 71.705 3•5.7 •14.42 2•.4•1 13.427 ‘„ 07-15- 11.5 24130.5 1.27 1.457 1.505 0.335 1.42 0.047 5.17 0.305 27.45• 17.200 23.110 4.502 25.•24 42.370 27.45• 17.200 ‘„ 07-15-17 214.01 1315.•40 1.40• 20.21 12.•70 0.313 13.05 0.047 3.1•2 0.242 27.43 .12 27•.320 31.5 100.•44 300.••• 27.43 .12 ‘„ 07-15-1• 25.131 52174.5• 1.0 20.12• 4.415 0.325 4.3• 0.047 1.72 0.40 2.••4 5.755 25.•3• 12.040 10.304 102.5• 2.••4 5.755 ‘„ 07-15-3 202.3 2502.13 0.40 17.740 4.1• 0.3• 4.5 0.047 2.53 0.51 2.4 7.414 31.52 13.3• 4••.5 2.753 2.4 7.414 ‘„ 07-15-14 •5.555 ••015.••5 1.725 1.•0 3.31 0.34• 4.174 0.04 1.404 0.33• 2.722 4.112 301.77 10.7 317.7•3 .3 2.722 4.112 ‘„ 07-15-21 23•.55 33.52• 1.025 1.•03 5.217 0.35 •.22 0.04 4.3• 0.•44 304.447 13.071 311.051 1.20 3•0.2 117.7•• 304.447 13.071 ‘„ 07-15-4 255.354 204.47 1.00• 1.35 7.•0• 0.35• .272 0.04 5.302 0.572 305.45 15.43 30.072 24.711 332.75• 172.• 305.45 15.43 ‘„ 07-15-12 •11.•2 4525.•2• 0.54• 1.3• 4.37 0.347 4.00 0.04 1.47 0.40• 30•.520 5.27 302.223 12.547 2•.157 100.•5• 30•.520 5.27 ‘„ 07-15- 1.72 133.507 1.340 1.52 7.0 0.33 .153 0.04 4.•57 0.50 30.430 14.024 2•.174 23.51 200.•13 13.20 30.430 14.024 ‘„ 07-15-20 2•4.327 40•.43 1.31 1.1 5.•0 0.344 10.2 0.04 .57 0.34 310.57 2•.032 2.72 2•.72• 21•.00 131.•00 310.57 2•.032 ‘„ 07-15-1 222.452 230•.0 1.30 1.44 .50• 0.375 10.55• 0.050 4.50 0.435 31•.413 14.174 323.550 2.25• 375.212 214.350 31•.413 14.174 ‘„