Several sessions of interest to the GeoPRISMS community will take place at ucpoming meetings. Abstract submission and registration deadlines are approaching.
1) 2015 GSA South Central Section Meeting, March 19-20, 2015, in Stillwater. OK and
2) Japanese Geoscience Union Meeting, May 24-28, 2015, at Makuhari Messe, Japan.
See below for more details.
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1) GSA South Central Section Meeting | March 19-20, 2015 | Stillwater, OK
Abstract deadline: December 16, 2014
Theme session T1. East African Rift, Southern Oklahoma Aulacogen, Rio Grande Rift, and other Continental Rifts: A tribute to the career of G. Randy Keller.
Description: Understanding the formation and evolution of continental rifts is important for both academic and industrial geoscientists, as evidenced by the selection of East African Rift as a focus site for the NSF GeoPRISMS program “Rift Initiation and Evolution”. This session invites presentations on the many examples of active and fossil rifts in Africa, North America and elsewhere. The session hopes to attract oral and poster presentations of original research and syntheses that will advance our understanding of processes, using geological, geophysical, structural, geochemical, and petrological approaches, that will lead to an improved knowledge of the origin of continental rifts, melt formation and hydrocarbon generation in them.
Convenors: Mohamed Abdelsalam, mohamed.abdel_salam@okstate.edu, Oklahoma State Univ.; Estella Atekwana, estella.atekwana@okstate.edu, Oklahoma State Univ.; Asish Basu, abasu@uta.edu, Univ. of Texas at Arlington; Kevin Mickus, kevinmickus@missouristate.edu, Missouri State Univ.; Robert Stern, rjstern@utdallas.edu, Univ. of Texas at Dallas.
Charlie Gilbert is running a one day Field Trip to see Cambrian igneous rocks of the Wichita Mountains, part of the S Okahoma Aulacogen.
Please visit the website at: http://www.geosociety.org/Sections/sc/2015mtg/ for more information about the meeting.
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2) Japanese Geoscience Union Meeting | May 24-28, 2015 | Makuhari Messe, Japan
Registration period is: Jan. 8-12, 2015
Cost JPY16,000- (JPGU member)
Abstract submission period: Jan. 8-Febr. 3 (JPY 3,000-)
Final submission period: Febr. 3-Febr. 18 (JPY 4,000-)
We would like to draw your attention to a symposium entitled “Mixed volatiles in subduction zones; Physical and chemical properties and processes” planned as a part of the International Session of the Annual Meeting of the Japanese Geoscience Union Meeting (JPGU2014) to be held at Makuhari Messe, May 24-28, 2015.
The objectives of this session, co-convened by B. O. Mysen (Carnegie Institution of Washington), E. Ohtani (Tohoku University), and D. Zhao (Tohoku University), are:
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
Please visit URLs: http://www.jpgu.org/index-e.html, and http://www.jpgu.org/meeting_e, for more information about the meeting, relevant dates, its objectives, history and venue and/or contact us directly.
We truly hope you would want to contribute to this session.
Bjorn O. MYSEN
Eiji OHTANI
Dapeng Zhao