1Porphyry2014Geneva_P1

7/26/2019 1Porphyry2014Geneva_P1

1/19

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Jeffrey W. Hedenquist

Ottawa

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2/19

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3/19

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4/19

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5/19

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6/19

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Satsuma Iwojima, S. Kyushu:

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7/19

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8/19

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9/19

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10/19

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11/19

"#$%& (&()*+(, )#-.(/)/". )" 0/)%"1-$( 2*.*3-4 56)% 71)"8*# 9:5;

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Batu Hijau porphyry, Sumbawa Arif and Baker, 2003

A

veins: early, high temperature (potassic stage, no alteration halo- bn, ccp). Wavy veins; ductile plastic rock (high T hypersaline liquid+ vapor inclusions): lithostatic P

B

veins: transitional

D

veins: later, lower temperature (phyllic stage, with alterationhalo - ccp, py, shallow bn + py, cv, en). Straight and center line;brittle rock (350 C 5-10 % NaCl inclusions): hydrostatic P

2B()-D(". -.@ ?B.)4 5ZPU

c/00/)"*4 9:5:

Typical porphyry

intrusion and vein

relationship


12/19

"#$%& (&()*+(, )#-.(/)/". )" 0/)%"1-$( 2*.*3-4 56)% 71)"8*# 9:5;

>= ?*@*.AB/() 59

?-0/0-F- SBIVB $"#$%&4 CB#H*& %))$,oo$/0")F"0@=1"+o

!#"DD*))4 9::6


13/19

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N/*@*00 *) -0=4 9:56

5;::

5:::

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9;: K) "D K4JRJ -) :=P;X SB -.@

:=:56X K" O:=UX SBEA 1B)"DD D"#

^24 )"$ ;:: + 8*0"Y (B#D-1*Q


14/19

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N/*@*00 *) -0=4 9:56

E-#0& 8) 3.

V 3.

E-#0& %-0" 3.

i OA($Q 3.

N/*@*00 *) -0=4 9:56

Vein abundance at surface (>5%

EH & 5% D), over 0.5% Cu grade

shell at ~350-700 m depth

5 H+


15/19

"#$%& (&()*+(, )#-.(/)/". )" 0/)%"1-$( 2*.*3-4 56)% 71)"8*# 9:5;

>= ?*@*.AB/() 5U

Damiana exotic

El Salvador, to eastc. late 1950s

pyrophyllite

muscovite

!"#$%& *L-+$0*(

2*"0"F& "D E0 c-03-@"#

S"#.*h" *) -0=4 5ZZP


16/19

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17/19

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SB "#* -)9f:: +

$"$%&00/)*

+B(1"3/)*

9 +B(1"3/)* j f A)g m 6 $"$%&00/)*

KAl3Si3O10(OH)2 + 2 H+ + 6 SiO2 =

3 Al2Si4O10(OH)2 + 2 K+

5= S""0/.F

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1".@*.(-)/".


18/19

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$"$%&00/)*-0B./)* 0/)%"1-$O0-)*Q

El Salvador, looking ~SE

Watanabe and

Hedenquist, 2001


19/19

"#$%& (&()*+(, )#-.(/)/". )" 0/)%"1-$( 2*.*3-4 56)% 71)"8*# 9:5;

Watanabe and

Hedenquist, 2001

]#*11/-(Yo -@3 -#F

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`"01-./1 3-$"#2/FF*.8-1%4 5ZZ9

>-)*# /. D*0(/1 +-F+-(]= C-&0"# *) -0=4 5Zbf

Deep

potassic

(biotite)

KB(1"3/)*"3*#$#/.)

Documents

1Porphyry2014Geneva_P1