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Short title
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Mixed volatiles in subduction zones
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Oral presentation
Date/Room/Chair
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May 25 AM2 (12:00 - 12:45)
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303
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Bjorn Mysen
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May 25 PM1 (14:15 - 16:00)
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303
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Bjorn Mysen
/ Dapeng Zhao
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May 25 PM2 (16:15 - 18:00)
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303
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Eiji Ohtani
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Poster presentation
Date/Room
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May 25 (Core Time 18:15 - 19:30)
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Convention Hall
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Contact
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Bjorn Mysen
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Email
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bmysen@ciw.edu
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Convener
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Bjorn Mysen
/ Eiji Ohtani
/ Dapeng Zhao
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Scope
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The principal volatiles in subduction zones and CO2 and H2O derived from devolatilization of carbonate and hydrous minerals in subducted oceanic crust and upper mantle. In the forearc region, highly reduced CH4 may be formed via deserpentinization of forarc mantle. Halogens (F and Cl) are can also be transported at least to upper mantle depth. Fluorine may, in fact, enhance the P-T stability of hydrous minerals.
Release of volatiles causes changes in elastic properties of the residual devolatilized rocks, which, in turn, governs seismic velocities, density, shear strength, and compressibility. The intergranular pore fluid also affects these properties. Whether or not fluid forms an interconnected network is critical for these properties. Fluid interconnectivity also controls the extent to which the fluid fluxes melting in and above subducting slabs and the trace and isotopic signatures of the source materials of melting. Physical properties of magma affect style of eruption. These properties, in turn, are affected by H2O/CO2 and F/Cl abundance ratios.
This session will focus on observations, experiments and theory to aid our understanding of
1.Relationship between fluid composition, pressure and temperature and connectivity of intergranular fluid.
2.Shear strength and elastic properties of volatile-bearing mineral assemblages
3.Pressure(depth)-temperature and redox-controlled stability of volatile-bearing minerals in subduction zones and beyond.
4.Melting phase relations and volatile compositions in subduction zones
5.Seismic activity and its relation to volatiles in minerals and in fluids and in melts.
6.Solubility and solution mechanisms of major, mineral, and trace elements in silicate-saturated mixed fluids.
7.Silicate-saturated fluids and volatile-saturated melts and alteration processes in subduction zones.
8.Volatiles and style of volcanic eruption
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Notes
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| Time |
Presentation No |
Title |
Author |
Presenter |
Abstract |
|
Oral Presentation May 25 AM2 (12:00-12:45) 303 to the top
|
|
12:00 - 12:30
|
Invited
SCG14-01
|
Carbon mobility by hydrous carbonate liquids at subduction zones
|
POLI, Stefano
|
POLI, Stefano
|
|
|
12:30 - 12:45
|
SCG14-02
|
H/D isotope salt effects in electrolyte-bearing aqueous solutions: In situ experiments at supercritical conditions
|
FOUSTOUKOS, Dionysis
MYSEN, Bjorn
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FOUSTOUKOS, Dionysis
|
|
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Oral Presentation May 25 PM1 (14:15-16:00) 303 to the top
|
|
14:15 - 14:45
|
Invited
SCG14-03
|
IMAGING FLUIDS AND FLUID REACTIONS IN SUBDUCTION ZONES
|
REYNARD, Bruno
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REYNARD, Bruno
|
|
|
14:45 - 15:00
|
SCG14-04
|
Intergranular fluid compositions in mantle xenoliths inferred from direct observation of crystal surfaces
|
OHTANI, Mari
NAKAMURA, Michihiko
YOSHIDA, Takeyoshi
other
|
OHTANI, Mari
|
|
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15:00 - 15:15
|
SCG14-05
|
Dehydration of chlorite and formation of a new hydrous phase
|
CAI, Nao
INOUE, Toru
FUJINO, Kiyoshi
|
CAI, Nao
|
|
|
15:15 - 15:30
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SCG14-06
|
Concentration dependence of water diffusion in silica glass at water pressure of 50 bar
|
KURODA, Minami
TACHIBANA, Shogo
OKUMURA, Satoshi
other
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KURODA, Minami
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|
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15:30 - 15:45
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SCG14-07
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Behavior of water, major and trace elements in subduction zone magmatism
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KIMURA, Jun-ichi
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KIMURA, Jun-ichi
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15:45 - 16:00
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SCG14-08
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Phase diagrams for CaCO_{3} + H_{2}O and their bearing on the genesis of carbonate melts
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POLI, Stefano
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POLI, Stefano
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|
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Oral Presentation May 25 PM2 (16:15-18:00) 303 to the top
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|
16:15 - 16:30
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SCG14-09
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C-O-H volatiles, redox variation and hydrogen isotope fractionation in silicate-COH systems in subduction zones
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MYSEN, Bjorn
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MYSEN, Bjorn
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|
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16:30 - 16:45
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SCG14-10
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Deep slab structure, dehydration and the Changbai intraplate volcanism
|
CHEN, Chuanxu
ZHAO, Dapeng
TIAN, You
other
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ZHAO, Dapeng
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16:45 - 17:00
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SCG14-11
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Hydrogen isotope fractionation between melts and aqueous fluid: Implications for magmatic processes
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DALOU, Celia
LE LOSQ, Charles
MYSEN, Bjorn
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DALOU, Celia
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17:00 - 17:15
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SCG14-12
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Experimental study on the origin of the D/H fractionation between silicate melts and aqueous fluids at HT/HP conditions
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LE LOSQ, Charles
CODY, George D.
DALOU, Celia
other
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LE LOSQ, Charles
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17:15 - 17:30
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3-min talk in an oral session (SCG14-P01)
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| Presentation No |
Title |
Author |
Presenter |
Abstract |
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Poster Presentation May 25 Core Time (18:15-19:30) Convention Hall to the top
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|
SCG14-P01
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GHz P wave buffer rod-transducer and its application to DAC experiments
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YONEDA, Akira
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YONEDA, Akira
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