Table Of ContentISSN 1514 - 4836
ISSN 1668 - 3242 en línea
INSTITUTO SUPERIOR DE CORRELACIÓN GEOLÓGICA
(INSUGEO)
Miscelanea 18
ELEMENTOS BASICOS DE
PETROLOGIA IGNEA
=+$%(",7!&>!#5&4?;@AA-
!"#$%!&'()*!"(+&,$&-".$#/*0()*!"$#& *$"/12)(#&3&45)"*)(#
Facultad de Ciencias Naturales e Instituto Miguel Lillo
6"*.$7#*,(,&'()*!"(+&,$&48)89:"
;("&<*08$+&,$&48)89:"
2009-2010
CONSEJO NACIONAL DE INVESTIGACIONES
CIENTIFICAS Y TECNICAS
Universidad Nacional de Tucumán
Instituto Superior de Correlación Geológica (INSUGEO)
Director: Dr. Florencio G. Aceñolaza
Director alterno:&B7C&=+$%(",7!&4!#$++*&
Editor: Dr. Florencio Gilberto Aceñolaza
Coordinador Editorial: Dr. Carlos A. Cónsole Gonella
Consejo Editor:
B7C&=+$%(",7!&>C&4!#$++*&D-';6E@?FG&B7C&=+H7$,!&4*"$!&D-';6E@?FG&B7C&I1)/!7&J(9!#&
DK8$"!#&=*7$#FG&B7C&J(H($+&L$7M#/&D-';6E@?FG&B7(C&>8("(&'C&J!##*&,$&4!#$++*&D-';6E@?FG&
B7(C&;8#("(&KC&@#/$M("&D-';6E@?FG&B7C&E8*++$79!&NC&=)$O!+(P(&D-';6E@?FG&B7C&<C&
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D @'Q=4S47$+$TFG&B7C&J*)(7,!&=+!"#!&D6"*.C&;(+/(FG&B7(C&K$(/7*P& !*7(&D6"*.C&&>8%83FG&B7C&
>8("& (7+!#&E8/*577$PS<(7)!&D ;- S@#U(O(FG&B7(C&-#(M$+&J:M("!&D-E<@S@#U(O(FG&B7C&>8+*!&
;((.$,7(&=+!"#!&D ;- S@#U(O(FG&B7C&LVM$7/&<*++$7&D6"*.C&&<V")R$"&S&=+$9("*(FG&B7C&=+-
)*,$#&'C&;*(+&D6"*.C&&Q$7"(9M8)!SK7(#*+FG&B7(C&I(+,$7$P&N$77$*7(&D6"*.C&Q$7"(9M8)!SK7(#*+FG&
B7(C&J$"(/(&E8*9(7($#&'$//!&D6'-;-'?;&S&K7(#*+FG&B7C& +(8,*!&E(8)R$7&D6"*.C&<!"/$.*-
,$!&W&67808(3FC&
Dirección:
-"#/*/8/!&;8U$7*!7&,$& !77$+()*X"&E$!+X0*)(C&<*08$+&A*++!&YZ[C& Q&\ZZZ&;("&<*08$+&,$&
48)89:"C&=70$"/*"(C&@S9(*+]&*"#80$!^)#"(/C8"/C$,8C(7&W&Q:0*"(&T$M]&TTTC*"#80$!C!70C(7
Miscelánea INSUGEO
@#/(&;$7*$&$#&$,*/(,(&U!7&$+&-';6E@?&)!"&$+&!M%$/!&,$&,(7&(&)!"!)$7&*"H!79()*X"&,$&
*"/$75#&0$!+X0*)!&3&,$+&9$,*!&(9M*$"/$G&#*$",!&+!#&/7(M(%!#&(++1&U8M+*)(,!#&7$U7$#$"/(/*.!#&
3&U8"/8(+$#C&@++(&*")+83$&081(#&,$&)(9U!G&7$#_9$"$#&,$&7$8"*!"$#&)*$"/12)(#&3&9!"!07(H1(#&
.*")8+(,(#&(+&!M%$/*.!&U7*")*U(+C&;$&7$`8*$7$&`8$&+!#&9("8#)7*/!#&#$("&7$9*/*,!#&$"&(U!3!&
*"H!79:/*)!&3&U(U$+a&+(#&*+8#/7()*!"$#&,$&*08(+&9("$7(&$"&)(%(&bcdYZ&)9&3&)!"&M8$"&)!"/7(#/$C&
4!,!#&+!#&/7(M(%!#&/*$"$"&7$.*#!7$#&3&/(9M*5"&#!"&U8$#/(#&$"&)!"#*,$7()*X"&,$+& !"#$%!&
@,*/!7C&E7("&U(7/$&,$&$#/$&9(/$7*(+&U8$,$&)!"#8+/(7#$&07(/8*/(9$"/$&3&!M/$"$7&$"&+(&U:0*"(&
e$M&,$+&-';6E@?]&TTTC*"#80$!C!70C(7C&@#/(&)!+$))*X"&$#/:&7$H$7$")*(,(&$"&A(/*",$fG&
@K; ?G&6+7*)R&-"/$7"(/*!"(+&Q$7*!,*)(+&B*7$)/!73G&4R!9#!"&J$8/$7#&-;-G&g!!+!0*)(+&J$)!7,G&
E(+$& $")(0$&A$(7"*"0&3&E$!7$HG&B*7$)/!73&!H&?U$"&=))$##&>!87"(+#&B?=>C&-"/$07(&$+&
'_)+$!&K:#*)!&,$&J$.*#/(#& *$"/12)(#&=70$"/*"(C
Miscelánea Insugeo nº 1:& !+$))*X"&,$&Q(+$!"/!+!01(&A*++!C& (/:+!0!&,$&HX#*+$#&U8M+*)(,!#&bhiZS
1993
Miscelánea Insugeo nº 2:&A!T$7&Q(+$!P!*)&!H&4(7*%(&J$0*X"G&;!8/R$7"&K!+*.*(&D(0!/(,!F
Miscelánea Insugeo nº 3:&=)/*.*,(,&,$#(77!++(,(&,87("/$&+!#&(O!#&bhhbSbhhc&D(0!/(,!F
Miscelánea Insugeo nº 4:&4R$&>87(#*)&(",& 7$/()$!8#&/$77$#/7*(+&M$,#&H7!9&;!8/R$7"&'$8`85"&
K(#*"G&=70$"/*"(
Miscelánea Insugeo nº 5:& 8(,7!&0$"$7(+&,$&+(&)*8,(,&,$&Q(7(":
Miscelánea Insugeo nº 6:& (9M7*("&H7!9&/R$&;!8/R$7"&@,0$
Miscelánea Insugeo nº 7:&4R$&?7,!.*)*("&!H&<$",!P(
Miscelánea Insugeo nº 8: ?7,!.*)*("&j&;*+87*("&#$)/*!"#&*"&/R$&Q7$)!7,*++$7(G&T$#/$7"&=70$"/*"(
Miscelánea Insugeo nº 9: (9M7!&j&?7,!.*)*("&#$)/*!"#&*"&'e&=70$"/*"(
Miscelánea Insugeo nº 10:&?7,!.*)*("&(",&;*+87*("&!H&/R$&Q7$)!7,*++$7(G&;("&>8("&Q7!.*,$")$G&
Argentina
Miscelánea Insugeo nº 11: ?7,!.*)*("&(",&;*+87*("&!H&/R$& !7,*++$7(&?7*$"/(+&(",&;*$77(#&
;8M(",*"(#G&'e&=70$"/*"(
Miscelánea Insugeo nº 12:&4$9(#&,$&+(&K*!,*.$7#*,(,&,$+&A*/!7(+&N+8.*(+&=70$"/*"!&-
Miscelánea Insugeo nº 13:&;*9U!#*!&K!,$"M$",$7
Miscelánea Insugeo nº 14:&4$9(#&,$&+(&K*!,*.$7#*,(,&,$+&A*/!7(+&N+8.*(+&=70$"/*"!&--
Miscelánea Insugeo nº 15:&4$f/87(&3&$#/78)/87(&,$&+(#&J!)(#&-0"$(#
Miscelánea Insugeo nº 16:&L*#/!7*(&,$&+(&E$!+!01(&=70$"/*"(
Miscelánea Insugeo nº 17 (1):&4$9(#&,$&+(&K*!,*.$7#*,(,&,$+&A*/!7(+&N+8.*(+&=70$"/*"!&---
Miscelánea Insugeo nº 17 (2):&4$9(#&,$&+(&K*!,*.$7#*,(,&,$+&A*/!7(+&N+8.*(+&=70$"/*"!&---
Instituto Superior de Correlación Geológica
Miguel Lillo 205 – San Miguel de Tucumán – República Argentina
ELEMENTOS BASICOS DE PETROLOGIA IGNEA
I
NDICE
Q7X+!0!& 12
=M#/7()/&S&J$#89$" 13
=07(,$)*9*$"/!# 14
1. CONCEPTOS FUNDAMENTALES
Introducción 15
7*/$7*!#&,$&)(9U! 15
7*/$7*!#&/$f/87(+$# 15
B$UX#*/!#&U*7!)+:#/*)!# 15
-"/$7U7$/()*X"&,$&+(#&7!)(#&10"$(# 16
@+&*"/$7*!7&,$&+(&4*$77( 16
?7*0$"&,$+&#*#/$9(&#!+(7&3&,$&+(&4*$77( 19
B*H$7$")*()*X"&,$&+(&4*$77( 21
k X9!&#$&R("&+!07(,!&$#/!#&)!"!)*9*$"/!#l 22
Meteoritos 23
I(7*()*!"$#&,$&U7$#*X"&3&/$9U$7(/87(&)!"&+(&U7!H8",*,(, 25
E7(,*$"/$#&,$&Q7$#*X" 26
E7(,*$"/$#&,$&4$9U$7(/87( Yi
2. CLASIFICACION Y NOMENCLATURA DE LAS ROCAS IGNEAS
Introducción 29
4579*"!#&)!9U!#*)*!"(+$# 29
Índice de color 30
+(#*2)()*X"&,$&+(&-6E; 30
J!)(#&H("$71/*)(# 31
'!9$")+(/87(&,$&+(&2087(&YSb&Dm=QN&U+8/X"*)(#F 32
4579*"!#&9!,*2)(/!7*!# 33
J!)(#&9:2)(#&3&8+/7(9:2)(# 34
'!9$")+(/87(&,$&+(&2087(&YS[&Dm=QN&.!+):"*)(#F 36
J!)(#&U*7!)+:#/*)(# 36
+(#*2)()*!"$#&`819*)(# ci
@"&+(&"!79(& -Qe&D.$7&("$f!&-F 38
A(&)+(#*2)()*X"&4=; 38
!")$U/!&,$&#(/87()*X" 40
3. TEXTURAS
Introducción 43
4$f/87(#&U7*9(7*(#&D-"/$7())*X"&H8",*,!S)7*#/(+F 44
A80(7$#&U7$H$7$")*(+$#&,$&"8)+$(9*$"/! 49
J$())*X"&3&7$#!7)*X"&9(09:/*)( 52
<!.*9*$"/!#&,*H$7$")*(+$#&,$&)7*#/(+$#&3&H8",*,! 52
4$f/87(#&)898+:/*)(# 53
<()+(#&U7*9(7*(# 54
N:M7*)(#&.!+):"*)(# 54
N:M7*)(#&U*7!)+:#/*)(# [i
4$f/87(#&#$)8",(7*(#&D)(9M*!#&U!#/9(09:/*)!#F 58
47("#H!79()*!"$#&U!+*9X72)(# 59
Maclas secundarias 60
J$())*!"$#&#$)8",(7*(#&3&,$&7$$9U+(P! 61
B$H!79()*X" 63
4. PROCESOS VOLCÁNICOS
Introducción 65
I8+)("*#9!&L(T(*("!&!&$"&@#)8,! 66
I8+)("*#9!&@#/7!9M!+*("! ni
I8+)("*#9!&I8+)("*("! ni
I8+)("*#9!&Q$+$("! 68
I8+)("*#9!&Q+*"*("! 69
!9U!7/(9*$"/!&,$+&9(/$7*(+&$3$)/(,! 69
A(.(#&U(R!$R!$&!&)!7,(,(# 69
Lavas AA o escoriaceas iZ
A(.(#&U*++!T&!&(+9!R(,*++(,(# ib
A(.(#M9(7*"(# ib
B!9!#&,$&+(.( iY
J!)(#&U*7!)+:#/*)(# ic
@.$"/!#&U*7!)+:#/*)!#&U$`8$O!# i[
Caidas de cenizas in
Flujos de cenizas ii
A(R(7# io
L*(+!)+(#/*/(# io
B$UX#*/!#&U*7!)+:#/*)!#&+(9*"(7$# io
7(/$7$#&3&)(+,$7(# ih
;8U$7S.!+)("$#&3U$7S$78U)*!"$#&$fU+!#*.(# 80
;8U$7S.!+):" 80
;8U$7S$78U)*X" 80
J$#$7.!7*!#&9(09:/*)!#&`8$&(+*9$"/("&(&+(#U$7S$78U)*!"$# 81
Calderas 83
E7(",$#&U7!.*")*(#&10"$(#&S&A-Q#C 85
Q+(/$(8&M(#:+/*)!#&!)$:"*)!# 85
Q+(/$(8&,$&M(#(+/!#&)!"/*"$"/(+$# 86
?7*0$"&,$&+!#&9(09(# oi
J8U/87(&)!"/*"$"/(+ oi
5. CUERPOS INTRUSIVOS O PLUTONICOS
Introducción 91
8$7U!#&+(9*"(7$# 91
8$7U!#&0+!M!#!# 94
J$+()*!"$#&,$&)!"/()/!&,$&+!#&U+8/!"$# 95
4*$9U!&,$&*"/78#*X" hi
Q7!H8",*,(,&,$&+!#&*"/78#*.!# hi
-"3$))*!"$#&9_+/*U+$#&3&U+8/!"$#&P!"(,!# 100
A!#&U7!)$#!#&,$&(#)$"#!&,$+&9(09(&3&$9U+(P(9*$"/!&3&$+&U7!M+$9(&,$+&$#U()*! 100
6. REGLA DE LAS FASES: SISTEMAS DE UNO Y DOS COMPONENTES
Introducción 103
N(#$#&$"&$`8*+*M7*!&3&7$0+(&,$&+(#&H(#$# 104
+(#*2)()*X"&,$&+!#&#*#/$9(# 106
;*#/$9(#&,$&8"&#!+!&)!9U!"$"/$ 106
Fusión Congruente 106
;*#/$9(&;1+*)$ bZi
Fusión incongruente 108
;*#/$9(#&,$&,!#&)!9U!"$"/$# 109
;*#/$9(#&,$&/*U!&$8/5)/*)! 109
;*#/$9(&,*XU#*,!S("!7/*/( 109
N8#*X"&$"&$`8*+*M7*! 111
7*#/(+*P()*X"&H7())*!"(,( 111
N8#*X"&U(7)*(+&$"&$`8*+*M7*! 111
B*#!+8)*X"&#X+*,(&)!9U+$/( 112
;*#/$9(&,$&+(#&U+(0*!)+(#(# 112
g!"$(,!&)!9U!#*)*!"(+ 113
N8#*X"&,$&$`8*+*M7*!&*")!"078$"/$ 114
N8#*X"&H7())*!"(,( 114
;*#/$9(&H!7#/$7*/(SH(3(+*/( 114
Fusión incongruente 115
;*#/$9(#&U$7*/5)/*)!#&M*"(7*!# 115
;*#/$9(&N!7#/$7*/(S#1+*)$ 115
7*#/(+*P()*X"&H7())*!"(,( bbi
J$+()*!"$#&,$&H8#*X" bbi
B$#9$P)+(&,$&,*#!+8)*!"$#&#X+*,(# 118
;*#/$9(&,$&+!#&H$+,$#U(/!#&(+)(+*"!# 118
7. SISTEMAS DE TRES COMPONENTES
Introducción 123
;*#/$9(#&$8/5)/*)!#&/$7"(7*!#&D="!7/*/(SN!7#/$7*/(SB*XU#*,!F 123
7*#/(+*P()*X"&H7())*!"(,( 124
N8#*X"&$"&$`8*+*M7*! 125
N8#*X"&U(7)*(+ 125
;*#/$9(&/$7"(7*!&U$7*/5)/*)!&D="!7/*/(SN!7#/$7*/(S;1+*)$F 125
7*#/(+*P()*X"&H7())*!"(,( bYi
;*#/$9(#&/$7"(7*!#&)!"&#!+8)*X"&#X+*,(&DB*XU#*,!S=+M*/(S="!7/*/(F bYi
;*#/$9(#&)!"&9:#&,$&/7$#&)!9U!"$"/$#&D=+M*/(S="!7/*/(SB*XU#*,!SN!7#/$7*/(F 129
Series de reacción 130
@H$)/!#&,$&+(&U7$#*X"&#!M7$&$+&)!9U!7/(9*$"/!&,$&+!#&H8",*,!# 131
@H$)/!#&,$&+!#&p8*,!#&)!"&$+&)!9U!7/(9*$"/!&,$&+!#&H8",*,!# 131
-")+8#*!"$#&p8*,(# 132
A!#&$H$)/!#&,$+&(08( 133
J!+&,$+&(08(&$"&$+&)!9U!7/(9*$"/!&9(09:/*)! 134
!"/7!+$#&#!M7$&+(#&$78U)*!"$#&.!+):"*)(#&$fU+!#*.(# 136
@M8++*)*X"&7$/7X07(,(]&$#/(,*!#&/(7,1!#&,$&#*#/$9(#&9(09:/*)!#&)!"2"(,!# 136
;*#/$9(#&R*,7!/$79(+$# bci
-#X/!U!#&3&+!#&#*#/$9(#&)!".$)/*.!#&,$&(08(&9$/$X7*)( 139
@H$)/!#&,$+&("R1,7*,!&)(7MX"*)! 139
!9U!"$"/$#&.!+:/*+$# 140
8. PETROLOGÍA QUÍMICA: ELEMENTOS MAYORES Y MENORES
Introducción 143
<*"$7(+$#&"!79(/*.!#C 144
B*(07(9(#&,$&.(7*()*X" 146
Q7!3$))*!"$#&M*.(7*("/$#C 146
q",*)$&,$&,*H$7$")*()*X"&D4R!7"/!"&3&48//+$F 149
q",*)$&,$&)7*#/(+*P()*X"&DQ!+,$.((7/&3&Q(7r$7F 150
!9$"/(7*!# 151
B*(07(9(&/7*:"08+(7&=N<C 152
B*(07(9(#&,$&.(7*()*X"&U(7(&9!,$+(7&+(&$.!+8)*X"&9(09:/*)( 152
J$+()*X"&$"/7$&$+$9$"/!#&,$&Q$(7)$ 153
<!,$+!#&07:2)!#&3&9(/$9:/*)!#&,$&$.!+8)*X"&9(09:/*)( 154
;$7*$#&,$&9(09(# 158
9. PETROLOGIA QUIMICA II: ELEMENTOS TRAZAS E ISOTOPOS
Introducción 165
B*#/7*M8)*X"&,$&+!#&$+$9$"/!# 165
<!,$+!#&,$&U7!)$#!#&#X+*,!SH8",*,! 168
K(O!&,$&H8#*X" 168
N7())*!"(9*$"/!&J(3+$*0R 169
A(#&/*$77(#&7(7(#]&8"&078U!&$#U$)*(+&,$&$+$9$"/!#&/7(P(# biZ
B*(07(9(#&;U*,$7&!&<8+/*$+$9$"/!# bib
=U+*)()*X"&,$&+!#&$+$9$"/!#&/7(P(#&(&#*#/$9(#&10"$!# biY
7*/$7*!#&0$!`819*)(#&U(7(&,*#)7*9*"(7&$"/7$&(9M*$"/$#&/$)/X"*)!# bi[
-#X/!U!# bin
-#X/!U!#&,$&!f10$"! bin
-#X/!U!#&,$&Q!/(#*!&3&=70X" bii
-#X/!U!#&,$&J8M*,*!&3&@#/7!")*! bii
-#X/!U!#&,$&;(9(7*!&3&'$!,*9*! 180
;*#/$9(#&67("*!G&4!7*!&3&Q+!9! 182
;*#/$9(&A8/$)*!&3&L(H"*! 184
;*#/$9(&,$&J$"*!&3&?#9*! 185
10. MAGMAS
Introducción boi
!9U!#*)*X"&,$&+!#&9(09(# 188
Q7!U*$,(,$#&H1#*)(#&,$&+!#&9(09(# 189
4$9U$7(/87(# 189
'(/87(+$P(&H1#*)!S`819*)(&,$&+!#&+1`8*,!#&#*+*):/*)!# 191
I*#)!#*,(, 192
@H$)/!#&,$+&$"H7*(9*$"/!&$"&+(&)7*#/(+*P()*X" 194
Densidad 196
4*$9U!&7$`8$7*,!&U(7(&+(&)7*#/(+*P()*X" bhi
=#)$"#!&,$+&9(09(&(&/7(.5#&,$+&9("/!&3&,$&+(&)!7/$P( bhi
47("#H$7$")*(&,$&9(#(&3&$"$701(&U!7&,*H8#*X" 199
Convección 200
B*H$7$")*()*X"&9(09:/*)( 202
+(#*2)()*X"&,$&+!#&U7!)$#!#&,$&,*H$7$")*()*X" 202
;*#/$9(#&`8$&*".!+8)7("&#X+!&+1`8*,!# 203
;*#/$9(#&`8$&*".!+8)7("&#X+*,!#&3&+1`8*,!# 203
;*#/$9(#&`8$&*".!+8)7("&+1`8*,!&3&.(U!7 204
;*#/$9(#&&`8$&*".!+8)7("&+1`8*,!G&#X+*,!&3&.(U!7 204
=#*9*+()*X"&9(09:/*)( 204
J$())*!"$#&)!"&+(#&7!)(#&,$&)(%( 204
=#*9*+()*X" 205
J!)(#&R1M7*,(# YZi
<*f*"0&W&9$P)+(&R!9!05"$( 208
<*"0+*"0&W&9$P)+(&R$/$7!05"$( 208
=+/$7()*X"&U!#/S#!+*,*2)()*X" 208
E$"$7()*X"&,$+&9(09(& 209
N8#*X"&U(7)*(+ 211
11. ROCAS PLUTONICAS
Introducción 213
Categorías de granitos 213
Q(7:9$/7!#&0$!`819*)(# 215
*"/87X"&M(/!+1/*)!&9$#!P!*)!&(",*"! Ybi
@+$9$"/!#&/7(P(#&)(7()/$71#/*)!#&,$&+!#&07("*/!# Ybi
(7()/$7*P()*X"&#$0_"&U(7/*)*U()*X"&,$+&9("/!&3&)!7/$P( 219
Granitos en zonas de colisión continente-continente 220
E7("*/!#&/*U!S= 221
Q$/7!05"$#*# 222
+(#*2)()*X"&0$!/$)/X"*)(&,$&+!#&07("*/!# 224
Q$09(/*/(# 224
Q$/7!05"$#*# 225
12. DORSALES OCEANICAS
Introducción 229
'(/87(+$P(&,$&+(&)!7/$P(&!)$:"*)( 231
g!"(&,$&H(++(#&/7("#H!79("/$# 231
B!7#(+$#&(#1#9*)(# 231
N+8%!&)(+X7*)!&3&#*#/$9(#&R*,7!/$79(+$#C 232
<$/(9!72#9!&,$+&H!",!&!)$:"*)!C 232
K(#(+/!#&,$&+(#&,!7#(+$#&9$,*!S!)$:"*)(#&D<?JKFC 232
!9U!#*)*X"&`819*)(C 233
?7*0$"&,$&+!#&9(09(#&<?JK&3&H8$"/$&9("/5+*)( 235
J$#$7.!7*!#&9("/5+*)!# Yci
<!,$+!#&U$/7!0$"5/*)!# Yci
?2!+*/(# 240
Introducción 240
Características distintivas 240
?7*0$"&3&$9U+(P(9*$"/! 241
;$7U$"/*"*P()*X" 244
13. MAGMATISMO DE INTRAPLACA
Introducción 245
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:9(7(#&,$&9(09(&$"&(+/!#&"*.$+$# 248
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-#X/!U!#&7(,*!05"*)!# 253
<!,$+!&U$/7!0$"5/*)! 255
Q7!H8",*,(,&,$&#$07$0()*X"&,$&+!#&9(09(# 255
14. FLUJOS BASALTICOS CONTINENTALES
Introducción Y[i
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!9U!#*)*X"&`819*)( 260
@+$9$"/!#&/7(P(# 260
-#X/!U!#&7(,*!05"*)!# 261
<!,$+!#&U$/7!0$"5/*)!# 262
15. MAGMATISMO EN MARGENES ACTIVOS DE PLACAS
Introducción 265
=7)!#&,$&*#+(#&!)$:"*)(# 265
@#/78)/87(&,$&+!#&(7)!#&,$&*#+(# Yni
@#/78)/87(&/579*)(&3&U7!)$#!#&,$&H8#*X"&U(7)*(+ Yni
;$07$0()*X"G&(#)$"#!&3&(+9()$"(9*$"/!&,$+&9(09( 268
(7()/$71#/*)(#&,$&+(#&#$7*$#&,$&9(09(# 269
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16. MAGMATISMO DE MARGENES CONTINENTALES ACTIVOS
Introducción Yih
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J$#$7.!7*!#&,$&9(09(&$"&+(&)!7/$P( 281
(7()/$71#/*)(#&U$/7!07:2)(#&,$&+(#&7!)(#&.!+):"*)(#&3&U+8/X"*)(# 283
Andesitas 283
J*!+*/(# 285
!9U!#*)*X"&`819*)(&,$&+!#&9(09(# 286
@+$9$"/!#&9(3!7$# Yoi
@+$9$"/!#&/7(P(# 288
-#X/!U!#&7(,*!05"*)!# 288
<!,$+!#&U$/7!0$"5/*)!# 289
17. MAGMATISMO EN CUENCAS DE RETRO-ARCO
Introducción 293
Q$/7!07(H1(&,$&+(#&7!)(#&.!+):"*)(# 295
!9U!#*)*X"&`819*)(&,$&+!#&9(09(# 295
@+$9$"/!#&9(3!7$# 295
@+$9$"/!#&/7(P(# 296
-#X/!U!#&7(,*!05"*)!# Yhi
<!,$+!&U$/7!0$"5/*)! Yhi
18. MAGMATISMO POTASICO DE INTRAPLACA
Introducción 301
s*9M$7+*/(# 302
Q$/7!07(H1(&,$&+(#&r*9M$7+*/(# 303
A(9U7!*/(# 304
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A(9U7X27!# 305
!9U!#*)*!"$#&`819*)(#&,$&r*9M$7+*/(#G&+(9U7!*/(#&3&+(9U7X27!# 306
@+$9$"/!#&9(3!7$# 306
@+$9$"/!#&/7(P(# 310
-#X/!U!#&7(,*!05"*)!# 311