The Early Izu-Bonin-Mariana Arc Mark Reagan University of Iowa Osamu Ishizuka Geological Survey of Japan/AIST Barry Hanan, Rosemary Hickey- Vargas, Matthew Heizler, Sherman Bloomer, Patricia Fryer, Jim Hawkins, Teruaki Ishii, Katie Kelley, Jun-Ichi Kimura, Yasuhiko Ohara, Robert Stern, Melinda Woods
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The Early Izu-Bonin-Mariana Arc Mark Reagan University of Iowa Osamu Ishizuka Geological Survey of Japan/AIST Barry Hanan, Rosemary Hickey-Vargas, Matthew.
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The Early Izu-Bonin-Mariana Arc
Mark ReaganUniversity of Iowa
Osamu IshizukaGeological Survey of Japan/AIST
Barry Hanan, Rosemary Hickey-Vargas, Matthew Heizler, Sherman Bloomer, Patricia
Sources: Meijer et al. (1983); Taylor (1992); Lee et al. (1995); Gill et al. (1994); Cosca et al. (1998); Pearce et al. (1999); Deschamps and Lallemand (2002); Straub et al. (2003); Ishizuka et al. (2006); This study
Cs Rb K Ba Sr Pb Th U Nb Ta La Ce Pr Nd Zr Hf Sm Eu Gd Ti Tb Dy Ho Er Yb Lu
0.10
1.00
10.00
100.00
Cs Rb K Ba Sr Pb Th U Nb Ta La Ce Pr Nd Zr Hf Sm Eu Gd Ti Tb Dy Ho Er Yb Lu
31 Ma Mariana trench slope
"First Arc" lavas PM
Nor
mal
ized
Con
cent
rati
ons
42 Ma Guam
ca. 36 Ma Rota, Saipan
30 Ma Bonin TurbiditesGill et al. (1994)
32
34
36
38
40
42
44
46
48
50
South NorthGuam
Mar. Trn.SaipanRota
DSDP458-9
Haha-jima
Chichi-jima
Ogasa.Ridge
ODP786
Adakitic forearc lavas
Boninites
Rhyolites
Transitional boninites
44
41
42.7
45.1
38.3
36
46.7-45.348.2-46.0
44.7
42.9 41.843.944
>47
MORB-like (FAB)
Agein
Ma
Ages and compositions of protoarc and first arc lavas
Ages from this study; Ishizuka et al. (2006); Cosca et al. (1998); Meijer et al. (1983)
49.3
32
?
“Normal” arc lavas
??
?
After Ishizuka et al. (2006)
31?
0
50
100
150
200
250
300
350
K/Ba
0
2
4
6
8
10
12
14
La/Nb
0
5
10
15
20
30 35 40 45 50
Age in 106 years
Rb/La
Mesozoic volcanogenic sed.
Silicic sedimentMORB
Arc
MORBOIB
Total slab flux+melting
-10
-5
0
5
10
15
20
25
30
-10 -5 0 5 10 15
Ndo
Hfo
OIB+Pacific volcanogenic sediment
Silicic sediment
Indian Ocean MORB-OIB+Philippine basins
Pacific MORB
Sources: GEOROC; PETDB; Woodhead et al. (2001); Pearce et al. (1999), this study
458, 459, first arc
Guam
Second arc, modern arc
Chichijima
782,786
37.5
38.0
38.5
39.0
39.5
17.5 18.0 18.5 19.0 19.5 20.0
206Pb/204Pb
208
Pb/
204
Pb Philippine basins
Jurassic volcaniclastic sediment
Average Asian loess
Cenozoic silicic sediments
NHRLIP
Sources: Meijer (1976); Hickey-Vargas and Reagan (1987); Hickey-Vargas (1989); Dobson and Tilton (1989); Taylor et al. (1994); Elliott et al. (1997); Hickey-Vargas (1998); Taylor and Nesbitt (1998); Pearce et al. (1999); Debari et al. (1999); Pettke et al. (2000); Sun and Stern, (2001); Woodhead et al. (2001); Ishizuka et al. (2006), this study