peliti- d iagram m a afm · and,ky,sil,prl st cld crd g rt chl bt bt bt peliti- d iagram m a afm d...
TRANSCRIPT
A n d , K y , S i l , P r l
S t
C l d C r d
G r t
C h l
B t
B t
B t
P e l i t i - D i a g r a m m a A F M
D a l s i s t e m a a s e i c o m p o n e n t i K F M A S H s i s c e n d e a t t r a v e r s o i l m e t o d o d e l l e p r o i e z i o n i a t r e c o m p o n e n t i A F M
S t : ( F e , M g ) 2 A l 9 O 6 ( S i O 4 ) 4 ( O H ) 2
C l d : ( F e 2 + , M g , M n ) ( A l , F e 3 + ) A l 3 O 2 ( S i O 4 ) 2 ( O H ) 4
C r d : ( M g , F e ) 2 A l 3 ( A l S i 5 ) O 1 8
C h l : ( M g , A l , F e ) 3 ( S i , A l ) 4 O 1 0 ( O H ) 2. ( M g , A l , F e ) 3 ( O H ) 6
P e l i t i - D i a g r a m m a A F M
I n a l t e r n a t i v a a l m e t o d o g e o m e t r i c o l a p r o i e z i o n e A F M d a l l ac o m p o s i z i o n e d e l l a m u s c o v i t e s i p u ò o t t e n e r e c a l c o l a n d o ip a r a m e t r i A , F e M s e c o n d o l e s e g u e n t i f o r m u l e :
C h l
B t
G r t G r t
B t
C h l
B t
C h l
G r t
B t
C h l
P e l i t i - D i a g r a m m a A F M
+ Q t z + H 2 O + M s
+ Q t z + H 2 O + M s
P h e + C h l = B t + Q t z + H 2 O
M s + C h l = B t + G r t + Q t z + H 2 O
G r t + M s + C h l = B t + S t + Q t z + H 2 O
M s + S t + C h l = B t + K y + Q t z + H 2 O
S t + M s + Q t z = A l 2 S i O 5 + B t + H 2 O
S t + M s + Q t z = G r t + S i l + B t + H 2 O
z o n a a B t
z o n a a G r t
z o n a a S t
z o n a a K y
z o n a a S i l
K y = S i l
P e l i t i - r e a z i o n i n e l m e t a m o r f i s m o b a r r o v i a n o
M s + C h l = B t + S t + Q t z + H 2 O
S t + Q t z = G r t + S i l + H 2 O
C l d + Q t z = S t + G r t + H 2 O
C l d
G r t C h l
B t
S t
G r t C h l
B t
K y , S i l
G r t
B tB t
G r t
S t
K y
P e l i t i - D i a g r a m m a A F M
+ Q t z + H 2 O + M s
+ Q t z + H 2 O + M s
G r t
G r t S t B t C h l
P e l i t i - v a r i a z i o n e d e l l a c o m p o s i z i o n e d e l l e f a s i n e l l a z o n a a s t a u r o l i t e
M s + C h l + G r t = S t + B t + Q t z + H 2 O
M s + S t + C h l = B t + K y + Q t z + H 2 O
S t + M s + Q t z = A l 2 S i O 5 + B t + H 2 O
S t + M s + Q t z = G r t + S i l + B t + H 2 O
S t + Q t z = G r t + S i l + H 2 O
C h l - o u t
M s - o u t ?
D i a g r a m m a T - X p e r l e m e t a p e l i t i d e l C o n n e m a r a ( I r l a n d a )
C h l + M s = S t + B t + Q t z + H 2 O
P e l i t i - m e t a m o r f i s m o d i a l t a t e m p e r a t u r a
M s + Q t z = A l 2 S i O 5 + K f s + H 2 O
M s + Q t z + H 2 O = S i l + m e l t
M s + B t + Q t z + H 2 O = S i l + m e l t
M s + Q t z = S i l + K f s + m e l t
B t + S i l + Q t z = C r d + K f s + m e l t
B t + S i l + Q t z = G r t + K f s + m e l t
B t + S i l + Q t z = G r t + C r d + K f s + m e l t
S i l + O p x = S p r + Q t z
M a p p a d e l b a s a m e n t o m e t a m o r f i c o d e l M a s s a c h u s e t t s
F a c i e s e z o n e m e t a m o r f i c h e
G = G r e e n s c h i s t f a c i e sS K y = S t a u r o l i t e - C i a n i t eS S = S t a u r o l i t e - S i l l i m a n i t eS M = S i l l i m a n i t e - M u s c o v i t eS M K = S i l l i m a n i t e - M u s c o v i t e - K - f e l d s p a t oS K = S i l l i m a n i t e - K - f e l d s p a t oS K G C = S i l l i m a n i t e - K - f e l d s p a t o - G r a n a t o - C o r d i e r i t e
Bt
+A
l s+
H2
O
St
+M
s+
Qt z
Ms
+Q
t zK
f s+
Al s
+H
2O
Cl d
+A
l sS
t+
Qt z
Cl d
+Q
t z
St
+G
r t
St
+Q
t z
Gr t
+S
i l
G r t + Q t z + S i l
St
+Cr d
Gr t
+Si l
S t + G r t + Q t z
C r dC r d
S t +Q t z
C r d+
A l s
Cl d
+Q
t zCr d
g r a n i t es o l i d u s
P e l i t i - S e r i e d i p r e s s i o n e i n t e r m e d i a e d i b a s s a p r e s s i o n e
A - A ’B - B ’
C - C ’
D - D ’
m e t a m o r f i s m o b a r r o v i a n o ( s e r i e d i P i n t e r m e d i a )
m e t a m o r f i s m o B u c h a n o A b u k u m a ( s e r i e d i b a s s a P )
m e t a m o r f i s m o d i c o n t a t t o
A n d
C r d C r d
C h l
B t
C h l
B t
B t
A n d
C r d
P e l i t i - m e t a m o r f i s m o d i b a s s a p r e s s i o n e
C h l + M s = C r d + B t + Q t z + H 2 O
C h l + M s + Q t z = C r d + B t + A n d + H 2 O
C r d + M s + Q t z = B t + A n d + H 2 O
A n d = S i l ( f i b r o l i t e )
F e - C r p
P r l
C h l
T l c
P r l
F e - C l d M g - C r p
C h l
T l c
K y K y
C l d
T l c
C h lG r t
C l d
G r t
T l c
P e l i t i - m e t a m o r f i s m o d i a l t a p r e s s i o n e
C r p = C l d + Q t z + H 2 O
F e - C h l + Q t z = G r t + T l c + H 2 O
F e M g - C h l + Q t z = F e M g - C l d + T l c + H 2 O
M g - C h l + Q t z = K y + T l c + H 2 O
P e l i t i - a s s o c i a z i o n i d i a l t a p r e s s i o n e i n z o n e c i r c u m - p a c i f i c h e
M g - C r p
F e - C r pA l m + R t
I l m + K y + Q t z
Grt
-in
Bt -
i n
Cl d
+Al s
St +
Qt z
+H
2O
A l m + S i l + Q t zF e - C r d
P r p + S i l + Q t zM g - C r d
S p r + Q t z + O p x
C r d
O p x+ S i
lS p
r +Q t z
M s +Q t z
K f s +A l s +
H 2O
Fe-S
t+Q
tz
K y
S i l
G r s +K y +
Q t z
A n
Alm
+Als
+H
2O
Ms+
Kfs
+Q
tz+
H2O
mel
t
Ab+
Kfs
+Q
tz+
H2O
mel
t
S t +Q t z
C r d + A l s +H 2
O
Ms +
Qt z
Kf s
+Al s
+m
e lt
K y
A n d
P rl
Al s
+Q
t z+
H 2O
S i lA n d
P e l i t i - g r i g l i a p e t r o g e n e t i c a
P e l i t i - g r i g l i a p e t r o g e n e t i c a p e r i l s i s t e m a K F M A S H ( A F M )
D a K l e i n & P h i l p o t t s ( 2 0 1 3 )
Qt z
+M
s+
St
Bt
+G
r t+
Al s
+H
2O
Ms
+Q
t zKf s
+Al s
+H2O
S i lA n d
K yS il
P e l i t i - l e b a t o z o n e