Geological Society of America (GSA) South-Central Section 48-th Annual Meeting

Date: Monday, March 17, 2014 — Tuesday, March 18, 2014

Location: University of Arkansas, Fayetteville, Arkansas, USA

Web: http://www.geosociety.org/sections/sc/2014mtg/

Includes the following symposia session:

S3. Late Cretaceous tectonics, magmatism, and sedimentation of the South-Central region

Convenors: Bob Stern (rjstern@utdallas.edu), Peter Clift (pclift@lsu.edu), Asish Basu (abasu@uta.edu)

For the first 17 million years of the Late Cretaceous epoch (Cenomanian, Turonian, and Coniacian, and Santonian; 100–83.5 Ma) the south-central region of what is now the United States was affected by igneous activity. We invite geoscientists with different perspectives on the tectonics, igneous activity, and sedimentation of this enigmatic time period to share their insights and explore what might have been responsible for this regional unrest. Presentations that explore manifestations of unrest during this time interval both in the region and elsewhere around the globe are welcome.

European Geosciences Union (EGU) General Assembly

Date: Sunday, April 27, 2014 — Friday, May 2, 2014

Location: Austria Center Vienna, Vienna, Austria

Web: http://www.egu2014.eu/home.html

Includes the following sessions:

GMPV20 Granites - Archaean to present

Convenors: Jean-Francois Moyen (jean.francois.moyen@univ-st-etienne.fr), Tracy Rushmer, Michael Brown (mbrown@umd.edu)

Granitoids are the dominant component of the continental crust. This session examines all aspects of granite petrology and geochemistry: the formation and extraction of melts; the processes that control the evolution from melt to granite; the emplacement, cooling and textural development of granites; the ore systems associated. Contributions from the fields of experimental petrology, geochemistry, mineralogy, field studies, etc. are welcome in this session. A particular focus of this session is the long term evolution of granitic magmatism, from the past to the present.

GMPV21/TS7.9 Interplay of magmatism and plate tectonic processes in a complex geodynamic setting - case studies in the Mediterranean and surrounding regions

Convenors: Szabolcs Harangi (szabolcs.harangi@geology.elte.hu), Michele Lustrino (michele.lustrino@uniroma1.it), Prelevic Dejan (prelevic@uni-mainz.de)

Can plate-tectonic concepts explain the origin of the magmas and the style of magmatism? Can our models on magma generation and evolution be used to understand the geodynamic evolution of an area? In the Mediterranean region a wide range of magmas (from strongly silica undersaturated carbonatites, silico-carbonatites and melitilites to strongly silica-oversaturated rhyolites) erupted for the last 50 Myr. They are related to a range of tectonic processes such as continental rifting and drifting, lithospheric boudinage, back-arc basin opening, formation of volcanic arcs and orogens, all of these linked in some way to the convergence between African and Eurasian plates and the associated micro-plates. Although there have been rapidly growing petrologic and tectonic models a number of highly controversial questions still remain. In this session we aim discussing the state-of-art particularly focusing on the origin of the magmas in this complex geodynamic setting.

We encourage the submission of contribution mostly in the following key issues: (1) Origin of magmas with ‘subduction signature’ in a post-collision setting: how such magmas can form without coeval subduction? (2) Origin of the alkaline sodic magmas in orogenic areas following or partly overlapping the calc-alkaline magmatism: are there any common points in the petrogenesis of the alkaline sodic magmas in the Mediterranean area and the western and central Europe rift zones? (3) Structural controls on the magmatism in complex areas: is it plate-tectonic controlled or deep mantle process controlled? (4) Presence of carbonatites and carbonate-rich igneous rocks: are these exotic compositions coming from the deep mantle or are the results of a normal CO2-bearing upper mantle?

GD3.4/GMPV27/SM6.16 Plumes and hotspots: paradigms, models, and implications

Convenors: Carole Cordier (carole.cordier@ujf-grenoble.fr), Nicholas Arndt (nicholas.arndt@ujf-grenoble.fr), Anne Davaille

This session will focus on the origin of magmatism in intraplate tectonic settings. Questions to be discussed include whether such magmas form in mantle plumes or by alternative mechanisms; the nature, composition, temperature and other physical characteristics of the source; the depth of instigation, the structure, and the dynamics of plumes, etc. Contributions from the fields of geochemistry, petrology, volcanology and geodynamics will be welcome.

GMPV33/TS3.5 Physics of volcano plumbing systems

Convenors: Olivier Galland (olivier.galland@fys.uio.no), Steffi Burchardt, Eoghan Holohan (holohan@gfz-potsdam.de), Matthieu Kervyn (makervyn@vub.ac.be), Benoit Taisne

Volcanic systems evolve through the interaction of numerous processes governing the ascent, emplacement and eruption of magma. These highly-dynamic processes operate and interlink on scales of millimetres to kilometres, from the Mantle to the Earth’s surface, and involve complex physics that are challenging to tackle. Understanding the physics of volcanic systems, whether single edifices or volcanic fields, is nonetheless crucial for forecasting the location, style and violence of volcanic eruptions, and for providing accurate hazard and risk assessments.

This session aims to bring together those who address the physical and temporal development of sub-volcanic and volcanic phenomena by using field or geophysical observations, theoretical or analytical solutions,, and experimental or numerical models . This session includes, but is not restricted to, the following topics:

• Physics of melt segregation in magmatic sources;
• Fluid mechanics of crystal-bearing melts;
• Fracture mechanics in rocks related to dyke, sill and cone sheet emplacement;
• Deformation of both magma and host rock related to pluton and laccolith emplacement;
• Effects of regional-tectonics on intrusions, edifices and volcanic fields;
• Prediction of volcanic vent location and distribution;
• Fragmentation of the magma and the host rock during magmatic and phreatomagmatic explosions;
• Dynamics of volcanic jets and plumes;
• Depositional processes in turbulent flows.

This session is process-oriented, and it aims to trigger cross-disciplinary interactions. We therefore strongly encourage comparisons and validation of modelling results with field and/or geophysical observations, as this is a crucial step toward fully unravelling the complex processes beneath, within and upon volcanoes.

GMPV41/SSP4.8 Mass extinctions and rapid global warming in deep time

Convenors: Sverre Planke (planke@vbpr.no), Wolfram Kuerschner (w.m.kuerschner@geo.uio.no), Richard Ernst (richard.ernst@ernstgeosciences.com), Henrik Svensen

Mass extinction and global warming events in Earth history are often temporarily associated with the eruption of Large igneous provinces (LIPS), e.g. the end-Permian, the end-Triassic, and the Paleocene-Eocene Thermal Maximum (PETM) events. Currently, LIPS and their effects on ancient crises are hot research topics. In this session, we invite a broad range of contributions on Earth crises in the Phanerozoic times. We envision a session where experts from different fields can meet and share new ideas and data that may shed new light on some of the biggest extinction and climate events in Earth history. Session topics include igneous intrusive and extrusive rates and processes, formation and faith of volcanic and metamorphic gases, proxy data from sedimentary sequences, the fossil extinction records, and climate modeling.

GMPV42/ERE3.2/TS3.7 Ore deposits: origin, exploration and mining

Convenors: Nicholas Arndt (nicholas.arndt@ujf-grenoble.fr), Mei-Fu Zhou, John Ludden (jludden@bgs.ac.uk), Christina Wang (wyanang@hotmail.com)

This session will deal with theories of origin of all types of ore deposits as well as techniques used to find and mine them. The emphasis will be on deposits in Europe but contributions on deposits in other regions will be welcome. Issues related to the environmental impact of mining and the "social licence to mine" could also be discussed. Of particular interest is the relationship between mineral deposits and supercontinental cycles. It is well known that some mineralization events were related to assembly and breakup of supercontinents, and deposits in certain regions may be comparable to those in previously adjacent blocks. We welcome contributions about mineral deposits whose formation is linked with either the breakup or assemblage of superconitnents, including Columbia, Rodinia and Gondawanaland. These deposits include stratiform sediment-hosted copper deposits formed in the great oxidization events during the assemble of Columbia, Proterozoic iron-oxide copper gold (IOCG) deposits, orogenic gold deposits, and super plume related magmatic ore deposits.

GMPV48 Mantle roots of deep seated magmas. Origin and evolution of layered mantle lithosphere in different geodynamic settings

Convenors: Igor Ashchepkov (igor.ashchepkov@igm.nsc.ru), Evgenii Sharkov (sharkov@igem.ru), Yana Fedorchuk

Possible topics:

Mantle roots of deep seated magmas. Mntle inclusions in different types of the magmas in intraplate, arc and oceanic island magmatism containing major information about composition, structure and processes of mantle evolution in different tectonic settings. Magmas are sampling mainly their way to the surface and allow to reconstruct the polybaric conduit and chamber systems and wall rocks. The mechanisms of melt mantle magmas transformation during their rise.

Intraplate magmatism allows to judge about composition and thermal conditions and heterogeneity of the mantle and it modification by plume and subduction related melts. Magma compositions depend on structure of magmatic systems, and changing their primary features due to differentiation, mixing and contamination by country rocks.

Key questions are:

1. Subdivision from the xenoliths sets primary varieties and melt modified types in the different levels of mantle columns. Reconstruction of primary mantle layering and position of the fusion zones primary host rock composition, PTXFO2 conditions, degree of hydration and accounting the chemistry and the physics of intruding melts and deriving fluids.
2. Dynamics of the developing of melt conduits accounting mantle layering.
3. Role and mechanism of presiding metasomatism in the transformation of mantle melts.

The questions for xenoliths in alkali basalts: (1) depth of the generation of mantle diapirs and mechanism of the emplacement and divergence of the mantle material during uplift, what was the reason of rising of structure of mantle diapirs and possible role of the plumes (or fluid flows) in their generation. The key questions for xenoliths from the cratonic lithosphere are: (1) signs and methods of mantle layering detection changes of mantle and variations of lithology in space in time using petrological, geochemical and geophysical techniques; (2) growth mechanisms of the continental lithosphere accounting the melting of submerging slabs and possible interaction with plums and rising melts; (3) types of mantle metasomatism and their relationship to tectonic setting; (4) mechanisms of melt migration through the lithosphere, etc.

The special interest is also spatial and compositional distribution of magmatic system within large igneous provinces (LIPs); (5) evolution of LIPs in time and its reasons.

GD6.1/GMPV54/SM6.5/TS8.4 The African continent - large-scale crust and mantle geodynamic processes

Convenors: Manel Fernandez (mfernandez@ictja.csic.es), Susan Webb, Jorg Ebbing (joerg.ebbing@ngu.no), Dominique Frizon De Lamotte

The African continent covers a very wide range of tectonothermal ages; it is affected by well-known deep geodynamic processes such as mantle plumes, continental rifting, and Alpine compression; and has recently been the target of regional and global geological and geophysical studies. The aim of this topical session is to bring together the main results of these recently finalized or still ongoing projects/studies to have a multidisciplinary approach on the large-scale geodynamic processes affecting the African continent. Therefore, a wide range of contributions are welcome (geodynamics, tectonophysics, tectonics, geochemistry, numerical and analogue modeling, seismics, seismology, potential fields, geomorphology, etc.) with the only condition that deal with large-scale regions/processes in Africa.

Invited speakers:
Carla Bratenberg
Ray Durrheim
Stewart Fishwick
Francois Guillocheau
Nick White

PS2.6 Volcanism, tectonics, impacts and other geological processes across the solar system

Convenors: Thomas Platz (thomas.platz@fu-berlin.de), Alexander Deutsch (deutsca@uni-muenster.de), Harald Hiesinger, Fred Jourdan (f.jourdan@curtin.edu.au), Matteo Massironi (matteo.massironi@unipd.it), Pascal Allemand (pascal.allemand@univ-lyon1.fr), Stephanie Werner, Paul Bryne (pbyrne@dtm.ciw.edu)

Geological processes such as volcanism, tectonics, and impacts are fundamental to the formation and evolution of the planets, moons, asteroids and comets of our Solar System. These processes are the primary agents responsible for the shaping of planetary surfaces, each of them in different ways and at different rates. For example, asteroids and comets have played a critical role during planetary evolution, by delivering the primary constituents of planetary bodies and by promoting resurfacing via impacts. Volcanic and tectonic processes are efficient mechanisms to reshape planetary surfaces and provide valuable information about planetary interiors and evolution. The study of geological processes in the Solar System is at the crossroad of many scientific disciplines using either in-situ sampling and analysis, remotely sensed data, or experimental and numerical modelling.

This session aims to compile all facets of volcanism, tectonism, impact cratering, and their associated interactions with other geological processes observed in our Solar System. By providing a forum for a broad range of discussions, these observations and interpretations will be investigated and (re)viewed in the light of our current understanding of related processes on Earth. Comparative studies on volcanic/tectonic systems, impact structures, and other processes on Earth using multi-instrumental, remotely sensed, experimental, computational, or field data are particularly welcome.

Geological Society of America (GSA) Rocky Mountain Section/Cordilleran Section Joint Meeting

Date: Monday, May 19, 2014 — Wednesday, May 21, 2014

Location: Bozeman, Montana, USA

Web: http://www.geosociety.org/Sections/rm/2014mtg/index.htm

Includes the following sessions:

T3. Precambrian I: Archean and Paleoproterozoic crustal evolution of Western Laurentia

Convenors: David Mogk (mogk@montana.edu), Paul Mueller (pamueller@ufl.edu)

This session will cover all aspects of the earliest creation and growth of the North American continent, including contributions from tectonics, geochemistry, and geochronology; studies of surficial deposits and environments; and the record of earliest life on Earth.

T4. Precambrian II: Meso- and Neoproterozoic evolution of Western Laurentia: in honor of Don Winston

Convenors: Paul Link (linkpaul@isu.edu), Reed Lewis (reedl@uidaho.edu)

This session will cover the continued growth and evolution of the North American continent through the Proterozoic and into the Cambrian, including tectonic reconstructions; petrologic and geochemical additions and modifications; metallogenesis; and evidence of early life, with special attention to the formation and development of the Belt Basin and the succeeding rifted margin. This session is associated with Field Trip 8 (Mesoproterozoic tectonics and sedimentation along the southern margin of the Belt Basin: in honor of Dan Winston).

T6. Yellowstone-Snake River Plain-Columbia River Volcanic Province: geology, petrology, geophysics, and geodynamics

Convenors: Bill Phillips (phillips@uidaho.edu), Dan Moore (moored@byui.edu)

New petrologic, seismic, and geodetic results have reinvigorated debate on the origin of Miocene-Recent volcanism within the Yellowstone-Snake River Plain-Columbia River Volcanic Province. This theme session seeks contributions in the fields of geology (including geologic mapping), petrology, geophysics, and geodynamics. Contributions from throughout the province are encouraged.

T10. The Early Triassic magmatic firestorm of the US and Canadian Cordillera: geochemical, petrological, and tectonic constraints

Convenors: Richard Gaschnig (gaschnig@umd.edu), Genet Duke

The Eocene and Paleocene Epochs were characterized by a widespread flare-up of volcanism and plutonism in the Cordillera, stretching east from central Oregon to South Dakota, north into British Columbia, and south into Colorado and New Mexico. We seek contributions dealing both with the petrology and geochemistry of individual magmatic centers and the larger space-time-composition patterns and links between magmatism and tectonism of this unusual time in the history of the Cordillera.

Goldschmidt 2014 Conference

Date: Sunday, June 8, 2014 — Friday, June 13, 2014

Location: Sacramento Convention Center, Sacramento, California, USA

Web: http://goldschmidt.info/2014/index

Includes the following sessions:

02c: Compositions of the interiors of the terrestrial planets - causes and consequences

Convenors: James Day (jmdday@ucsd.edu), Radjeep Dasgupta (radjeep.dasgupta@rice.edu)

Planetary interior compositions are fundamentally controlled by the material accreted to form a planet and the physical processes of differentiation. This session aims to draw together experimental petrologists, geochemists, and modelers to discuss the interior compositional constraints for rocky Solar System planets. Topics of interest include - but are not limited to - constraints on the planetary interior compositions based on geophysical and geochemical observations, relative contributions of accretion, magma ocean differentiation versus late, heavy bombardment on the volatile and other trace element budgets and redox state of bulk mantle, the presence and causes of lithologic heterogeneities in mantles, and compositional controls on physical processes occurring on planetary bodies (c.f. plate tectonics, plumes).

05e: Intra-plate magmatism from recycled crust and mantle

Convenors: Andreas Stracke (stracke.andreas@uni-muenster.de), John Lassiter (lassiter1@mail.utexas.edu)

The origin and magnitude of mantle heterogeneity is governed by the nature, extent, and timing of geochemical cycling between the planets’ major silicate reservoirs: the crust, lithosphere, and mantle. The spatial scale and distribution of the geochemically and lithologically diverse materials in the Earth’s mantle is thereby determined by the fluid dynamics of mantle convection. During intra-plate magmatism, partial melting preferentially samples geochemically enriched source components. These enriched components likely represent a variety of materials that have been recycled into the mantle and distributed heterogeneously by a range of mechanisms over Earth’s history. The enriched geochemical signatures observed in intra-plate volcanic rocks may therefore identify the large-scale geochemical processes responsible for continuous silicate Earth differentiation. This session welcomes innovative contributions employing a broad spectrum of analytical and computational methods to study the origin, mode of sampling, and length scale of mantle heterogeneities sampled by intra-plate magmatism.

06a: The scum of the Earth - the composition of the continental crust and mechanisms for its production through time

Convenors: Catherine Chauvel (catherine.chauvel@ujf-grenoble.fr), Roberta Rudnick (rudnick@geol.umd.edu), Bruno Dhuime (b.dhuime@bristol.ac.uk), Oliver Jagoutz (jagoutz@mit.edu)

Mantle melting produces basalts but the continental crust is andesitic on balance. Petrology, geochemistry, geodynamics and geophysics provide insights into how continental crust is extracted from the mantle. In spite of great progress in these fields, the process of crust formation is still enigmatic to a significant extent. How is continental crust made and differentiated? What is our best estimate of continental crust? Why does the crust appear andesitic on average if mantle melting appears to produce basalt? This session is devoted to cross-pollination and integration for the purpose of progressing research in crustal petrogenesis.

Keynote: Peter Cawood (University of St Andrews, UK)

06b: The supercontinent cycle

Convenors: John Goodge (jgoodge@d.umn.edu), Peter Cawood (pac20@st-andrews.ac.uk), Wouter Bleeker (wouter.bleeker@nrcan.gc.ca), Adam Maloof (maloof@princeton.edu)

Supercontinents come and go, causing massive shifts in continental climate, biotope, and geodynamic systems. The episodic existence of supercontinents exerts a fundamental control on secular changes in the Earth system, and may reflect a deeper geodynamic periodicity. This session aims to bring together geodynamicists, petrologists, biogeochemists, sedimentologists, and economic geologists to explore the full spectrum of causes and consequences of supercontinent formation. We propose to focus attention on episodicity gleaned from the geochronological record to assess tectonic and environmental process associated with supercontinent formation over time. How much new crust is generated? Is it long-lived? What mechanisms are involved in supercontinent assembly? How is supercontinent amalgamation manifested by mineral deposits? What are the implications of supercontinent formation on environmental systems in the continental realm? What biogeochemical feedbacks are there between the continents, atmosphere and oceans that influence development of living systems? What’s happening across the remainder of the non-amalgamated surface system (oceans)? What are the effects of supercontinent assembly on seafloor dynamics? How are deep-earth and near-surface processes linked in the deep geologic past? In general, the session will focus on supercontinent assembly, rather than breakup, and the implications of supercontinent formation for geodynamic process, crustal growth history, geochemical and paleoenvironmental linkages across the continent-atmosphere-ocean system, mineral deposit distributions, and periodicity.

12-th International Platinum Symposium

Date: Monday, August 11, 2014 — Thursday, August 14, 2014

Location: Ural Federal University, Yekaterinburg, Russia

Web: http://conf.uran.ru/default.aspx?cid=12ips##3

Includes the following sessions:

Magma dynamics, cumulates and ore genesis

Convenors: Rais Latypov (rais.latypov@wits.ac.za), Steve Barnes (steve.barnes@csiro.au)

Magmatic ore deposits produced by mafic-ultramafic magmatism (e.g. massive sulphide bodies, chromitite and Fe-Ti oxide layers, platinum group element-rich horizons) are igneous cumulate rocks that are generated by processes of magma differentiation, crystallization and solidification in crustal chambers. Therefore a key to understanding the origin of these deposits and consequently to developing a better strategy for their exploration is the deep knowledge of physico-chemical processes that govern magma evolution in crustal chambers and conduits. This session will emphasize the physical and fluid dynamic aspects of igneous petrology that bear on three major ore-related questions: where are ore deposits located? How did they get there? and how were they produced? The following fundamental aspects of magmatic processes will be addressed by this session: the relative importance of in situ crystallization versus crystal settling in evolving magma chambers and the origin of layering; the role of thermal and compositional convection in magma differentiation; the effects of compaction and post-cumulus melt migration within the cumulate pile on compositional profiles of magmatic bodies; the interactions between resident melt in the chamber and inflowing magma during chamber replenishment events; and the fluid dynamics and emplacement mechanisms of magmas, crystal slurries and emulsions. This session welcomes field, textural, mineralogical, geochemical, isotopic, experimental and numerical examination of igneous intrusions that provide us with new ideas on how magma chambers and conduits work to produce magmatic ore deposits.

Keynote speaker: Christian Tegner

PGE mineralization in mafic-ultramafic intrusions of Russia: geology and petrogenesis

Convenors: Alexey Ariskin (ariskin@rambler.ru), Wolfgang Maier (maierw@cf.ac.uk)

The session will focus on PGE mineralized mafic to ultramafic intrusive complexes of Russia. We invite presentations that provide information on their geology, petrology, mineralogy, and geochemistry and that help to constrain the petrogenesis of the intrusions and their different styles of PGE mineralization. Contributions dealing with sulfide and chromite transport in the parental magmas, and percolation of sulfides and volatiles through the cumulate pile are particularly welcome, as are talks and posters that have implications for exploration targeting, using a variety of techniques and vectors.

PGE-Cu-Ni sulphide-bearing ultramafic-mafic intrusions of the Noril'sk Province: insights into ore genesis and exploration

Convenors: Kreshimir Malitch (dunite@yandex.ru), Chusi Li (cli@indiana.edu)

Despite the long-term study of the ‘Noril’sk-type’ intrusions (e.g., Noril`sk-1, Talnakh and Kharaelakh), they remain a subject of ongoing debate related to their origin. A broad range of different or contradictory ideas for the formation of ore-bearing ultramafic-mafic intrusions in the Noril’sk region has been proposed. These include (a) differentiation of a single magma, (b) emplacement of multiple magmas with distinct compositions, (c) volcanic feeder systems, (d) a crust-mantle interaction model, (e) assimilation and (f) metasomatic models. A common assumption in these models is that the intrusions are coeval with the 250 Ma Siberian flood basalts, which erupted over a period of ~1 Ma or less, despite the fact that the age range of the intrusions is considerably larger. We invite contributions that use mineralogy, petrology, geochemistry, geochronology and structural controls to improve our understanding on the origin of ultramafic-mafic intrusions with different degrees of PGE-Cu-Ni sulphide mineralisation (i.e., economic, subeconomic and non-economic) in the Polar Siberia. New isotope-geochemical data that can be used for the exploration of PGE-Cu-Ni sulphide deposits are particularly welcome.

Keynote speakers: Nicholas Arndt and Nadezhda Krivolutskaya

Includes the following fieldtrips:

Ultramafic-mafic intrusions, volcanic rocks and PGE-Cu-Ni deposits of the Noril'sk Province, Polar Siberia

Date: 1^st-8^th August

Leaders: Sergey Sluzhenikin (sluzh@igem.ru), Nadezhda Krivolutskaya (nakriv@mail.ru), Oleg Simonov

The Kondyor zoned clinopyroxenite-dunite massif and related platinum placers, Aldan Shield, Siberian Craton

Date: 1^st-8^th August

Leaders: Vladimir Prihod'ko

Platinum Belt of the Urals: world-class Nizhny-Tagil and Volkovsky massifs and associated ore deposits

Date: 15^th-16^th August

Leaders: Elena Anikina (elena.anikina@igg.uran.ru), Kreshimir Malitch (dunite2009@mail.ru)

Platinum Belt of the Urals: Kachkanar and Svetly Bor massifs and associated ore deposits

Date: 15^th-16^th August

Leader: Evgeny Pushkarev (pushkarev@igg.uran.ru)

The Ioko-Dovyren mafic-ultramafic layered intrusion in the Northern Baikal region and associated PGE-Cu-Ni deposit

Date: 15^th-25^th August

Leader: Evgeny Kislov (evg-kislov@yandex.ru)

Geological Society of America (GSA) Annual Meeting

Date: Sunday, October 19, 2014 — Wednesday, October 22, 2014

Web: http://community.geosociety.org/gsa2014/home

Includes the following sessions:

T117. Magmas and their sources: a tribute to the distinguished career of Fred Frey

Convenors: Michael Garcia (mogarcia@hawaii.edu), Michael Rhodes (jmrhodes@geo.umass.edu), Rosemary Hickey-Vargas (hickey@fiu.edu)

Fred Frey, 2014 MGPV Distinguished Career Award recipient, has devoted his career to studying magmas, their sources, and formation. We encourage research by those who are inspired by or have worked with this distinguished geoscientist.

P2/T206. Mass extinctions: volcanism, impacts, and catastrophic environmental changes

Convenors: David Bond (d.bond@hull.ac.uk), Gerta Keller (gkeller@princeton.edu), Thierry Adatte (thierry.adatte@unil.ch)

This session explores recent advances in the stratigraphic and geochemical records of mass extinctions and impacts that have seen the impact-kill scenario recede in favor of terrestrial causes that may ultimately derive from massive volcanism.

T6. Birth and death of supercontinents

Convenors: Daniel Pastor-Galan (d.pastorgalan@uu.nl), Brendan Murphy (bmurphy@stfx.ca), William Collins (bill.collins@newcastle.edu.au)

Earth's landmasses amalgamate altogether into supercontinents following a quasi-periodic cycle since the origin of tectonics. This session will review the tectonic evolution of supercontinents from amalgamation to break up at every level of Earth's structure.

T20. Magmatism, tectonics, and metallogeny of the Central Asian Orogenic Belt

Convenors: Wenjiao Xiao (wj-xiao@mail.igcas.ac.cn), Bo Wan (wanbo@mail.iggcas.ac.cn)

This session will provide an international forum for interdisciplinary discussions on accretionary orogenic belts, specifically on the Central Asian Orogenic Belt (CAOB).

T2. Emplacement of upper crustal magmatic intrusions: field studies of laccoliths, sills, and subvolcanic plugs

Convenors: Paul Wetmore (pwetmore@cas.usf.edu), Eric Horsman (horsmane@ecu.edu), Charles Connor (cbconnor@usf.edu), Scott Giorgis (giorgis@geneseo.edu)

This session is focused on the emplacement and melt-host rock interactions of shallow crustal intrusions including sills, laccoliths, and subvolcanic conduits.

Recent advances in igneous processes

Convenors: Sheila Seaman (sjs@geo.umass.edu), Diane Smith (dsmith@trinity.edu)